[ANNOUNCE] tig - text-mode interface for git

[ANNOUNCE] tig - text-mode interface for git

[Jonas Fonseca]

Hello,

I am pleased to announce tig, a simple git repository browser written
using ncurses. Basically, it just acts as a front-end for git-log and
git-show/git-diff. Additionally, you can also use it as a pager for git
commands.

Currently, it just provides a minimum support for looking through
changes. I hope to slowly extend it to also be usable as a front-end for
git-blame and for tree browsing. Also, it doesn't do any fancy revision
graph rendering, but I want to at least give it a shot at some point. :)

Following is the man page. I've attached the tig.c file if you want to
try it out. Compile it with:

	$ cc -o tig tig.c -lncurses

More project files (including a Makefile) can be found at:

	http://jonas.nitro.dk/tig/

Obligatory screenshots at:

	http://jonas.nitro.dk/tig/screenshots/

---

NAME

   tig - text-mode interface for git

SYNOPSIS

   tig [options]
   tig [options] [--] [git log options]
   tig [options] log  [git log options]
   tig [options] diff [git diff options]
   tig [options] show [git show options]
   tig [options] <    [git command output]

DESCRIPTION

   Browse changes in a git repository. Additionally, tig(1) can also act
   as a pager for output of various git commands.

   When browsing repositories, tig(1) uses the underlying git commands
   to present the user with various views, such as summarized commit log
   and showing the commit with the log message, diffstat, and the diff.

   Using tig(1) as a pager, it will display input from stdin and try to
   colorize it.

OPTIONS

   -l
           Start up in log view using the internal log command.

   -d
           Start up in diff view using the internal diff command.

   -n[INTERVAL], --line-number[=INTERVAL]
           Prefix line numbers in log and diff view. Optionally, with
           interval different than each line.

   -t[NSPACES], --tab-size[=NSPACES]
           Set the number of spaces tabs should be expanded to.

   -v, --version
           Show version and exit.

   --
           End of tig(1) options. Useful when specifying command options
           for the main view. Example:

		$ tig -- --since=1.month

   log [git log options]
           Open log view using the given git log options.

   diff [git diff options]
           Open diff view using the given git diff options.

   show [git show options]
           Open diff view using the given git show options.

   [git log options]
           tig(1) will stop the option parsing when the first command
           line parameter not starting with "-" is encountered. All
           options including this one will be passed to git log when
           loading the main view. This makes it possible to say:

		$ tig tag-1.0..HEAD

  Pager mode

   If stdin is a pipe, any log or diff options will be ignored and the
   pager view will be opened loading data from stdin. The pager mode can
   be used for colorizing output from various git commands.

   Example on how to colorize the output of git-show(1):

	$ git show | tig

  Git command options

   All git command options specified on the command line will be passed
   to the given command and all will be shell quoted before they are
   passed to the shell.

        If you specify options for the main view, you should not use the
   Note --pretty option as this option will be set automatically to the
        format expected by the main view.

   Example on how to open the log view and show both author and
   committer information:

	$ tig log --pretty=fuller

   See the "Specifying revisions" section below for an introduction to
   revision options supported by the git commands. For details on
   specific git command options, refer to the man page of the command in
   question.

ENVIRONMENT VARIABLES

   Several options related to the interface with git can be configured
   via environment options.

  Repository references

   Commits that are referenced by tags and branch heads will be marked
   by the reference name surrounded by [ and ]:

	2006-03-26 19:42 Petr Baudis       | [cogito-0.17.1] Cogito 0.17.1

   If you want to filter out certain directories under .git/refs/, say
   tmp you can do it by setting the following variable:

	$ TIG_LS_REMOTE="git ls-remote . | sed /\/tmp\//d" tig

   Or set the variable permanently in your environment.

   TIG_LS_REMOTE

           Set command for retrieving all repository references. The
           command should output data in the same format as
           git-ls-remote(1).

  View commands

   It is possible to alter which commands are used for the different
   views. If for example you prefer commits in the main view to be
   sorted by date and only show 500 commits, use:

	$ TIG_MAIN_CMD="git log --date-order -n500 --pretty=raw %s" tig

   Or set the variable permanently in your environment.

   Notice, how %s is used to specify the commit reference. There can be
   a maximum of 5 %s ref specifications.

   TIG_DIFF_CMD

           The command used for the diff view. By default, git show is
           used as a backend.

   TIG_LOG_CMD

           The command used for the log view. If you prefer to have both
           author and committer shown in the log view be sure to pass
           --pretty=fuller to git log.

   TIG_MAIN_CMD

           The command used for the main view. Note, you must always
           specify the option: --pretty=raw since the main view parser
           expects to read that format.

The viewer

   tig(1) presents various views of a repository. Each view is based on
   output from an external command, most often git log, git diff, or git
   show.

   The main view
           Is the default view, and it shows a one line summary of each
           commit in the chosen list of revisions. The summary includes
           commit date, author, and the first line of the log message.
           Additionally, any repository references, such as tags, will
           be shown.

   The log view
           Presents a more rich view of the revision log showing the
           whole log message and the diffstat.

   The diff view
           Shows either the diff of the current working tree, that is,
           what has changed since the last commit, or the commit diff
           complete with log message, diffstat and diff.

   The pager view
           Is used for displaying both input from stdin and output from
           git commands entered in the internal prompt.

   The help view
           Displays the information from the tig(1) man page. For the
           help view to work you need to have the tig(1) man page
           installed.

KEYS

   Below the default key bindings are shown.

  View switching

   m       Switch to main view.
   d       Switch to diff view.
   l       Switch to log view.
   p       Switch to pager view.
   h       Show man page.
   Return  If on a commit line show the commit diff. Additionally, if in
           main or log view this will split the view. To open the commit
           diff in full size view either use d or press Return twice.
   Tab     Switch to next view.

  Cursor navigation

   Up      Move cursor one line up.
   Down    Move cursor one line down.
   k       Move cursor one line up and enter. When used in the main view
           this will always show the diff of the current commit in the
           split diff view.
   j       Move cursor one line down and enter.
   PgUp    Move cursor one page up.
   PgDown  Move cursor one page down.
   Home    Jump to first line.
   End     Jump to last line.

  Scrolling

   Insert  Scroll view one line up.
   Delete  Scroll view one line down.
   w       Scroll view one page up.
   s       Scroll view one page down.

  Misc

   q       Quit
   r       Redraw screen.
   z       Stop all background loading. This can be useful if you use
           tig(1) in a repository with a long history without limiting
           the revision log.
   v       Show version.
   n       Toggle line numbers on/off.
   :       Open prompt. This allows you to specify what git command to
           run. Example:

		:log -p

Revision specification

   This section describes various ways to specify what revisions to
   display or otherwise limit the view to. tig(1) does not itself parse
   the described revision options so refer to the relevant git man pages
   for futher information. Relevant man pages besides git-log(1) are
   git-diff(1) and git-rev-list(1).

   You can tune the interaction with git by making use of the options
   explained in this section. For example, by configuring the
   environment variables described in the "View commands" section.

  Limit by path name

   If you are interested only in those revisions that made changes to a
   specific file (or even several files) list the files like this:

	$ tig log Makefile

   To avoid ambiguity with repository references such as tag name, be
   sure to separate file names from other git options using "--". So if
   you have a file named master it will clash with the reference named
   master, and thus you will have to use:

	$ tig log -- master

        For the main view, avoiding ambiguity will in some cases require
   Note you to specify two "--" options. The first will make tig(1) stop
        option processing and the latter will be passed to git log.

  Limit by date or number

   To speed up interaction with git, you can limit the amount of commits
   to show both for the log and main view. Either limit by date using
   e.g. --since=1.month or limit by the number of commits using -n400.

   If you are only interested in changed that happened between two dates
   you can use:

	$ tig -- --after=May.5th --before=2006-05-16.15:44

        The dot (".") is used as a separator instead of a space to avoid
   Note having to quote the option value. If you prefer use --after="May
        5th" instead of --after="May 5th".

  Limiting by commit ranges

   Alternatively, commits can be limited to a specific range, such as
   "all commits between tag-1.0 and tag-2.0". For example:

	$ tig log tag-1.0..tag-2.0

   This way of commit limiting makes it trivial to only browse the
   commits which haven't been pushed to a remote branch. Assuming origin
   is your upstream remote branch, using:

	$ tig log origin..HEAD

   will list what will be pushed to the remote branch. Optionally, the
   ending HEAD can be left out since it is implied.

  Limiting by reachability

   Git interprets the range specifier "tag-1.0..tag-2.0" as "all commits
   reachable from tag-2.0 but not from tag-1.0". Where reachability
   refers to what commits are ancestors (or part of the history) of the
   branch or tagged revision in question.

   If you prefer to specify which commit to preview in this way use the
   following:

	$ tig log tag-2.0 ^tag-1.0

   You can think of ^ as a negation operator. Using this alternate
   syntax, it is possible to further prune commits by specifying
   multiple branch cut offs.

  Combining revisions specification

   Revisions options can to some degree be combined, which makes it
   possible to say "show at most 20 commits from within the last month
   that changed files under the Documentation/ directory."

	$ tig -- --since=1.month -n20 -- Documentation/

  Examining all repository references

   In some cases, it can be useful to query changes across all
   references in a repository. An example is to ask "did any line of
   development in this repository change a particular file within the
   last week". This can be accomplished using:

	$ tig -- --all --since=1.week -- Makefile

BUGS

   Known bugs and problems:

     * If the screen width is very small the main view can draw outside
       the current view causing bad wrapping. Same goes for title and
       status windows.

TODO

   Features that should be explored.

     * Searching.

     * Locale support.

COPYRIGHT

   Copyright (c) Jonas Fonseca <fonseca@diku.dk>, 2006

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or (at
   your option) any later version.

SEE ALSO

   git(7),
   cogito(7)
   gitk(1): git repository browser written using tcl/tk,
   gitview(1): git repository browser written using python/gtk.

-- 
Jonas Fonseca

tig.c

[Jonas Fonseca]

/* Copyright (c) 2006 Jonas Fonseca <fonseca@diku.dk>
 * See license info at the bottom. */
/**
 * TIG(1)
 * ======
 *
 * NAME
 * ----
 * tig - text-mode interface for git
 *
 * SYNOPSIS
 * --------
 * [verse]
 * tig [options]
 * tig [options] [--] [git log options]
 * tig [options] log  [git log options]
 * tig [options] diff [git diff options]
 * tig [options] show [git show options]
 * tig [options] <    [git command output]
 *
 * DESCRIPTION
 * -----------
 * Browse changes in a git repository. Additionally, tig(1) can also act
 * as a pager for output of various git commands.
 *
 * When browsing repositories, tig(1) uses the underlying git commands
 * to present the user with various views, such as summarized commit log
 * and showing the commit with the log message, diffstat, and the diff.
 *
 * Using tig(1) as a pager, it will display input from stdin and try
 * to colorize it.
 **/

#ifndef	VERSION
#define VERSION	"tig-0.3"
#endif

#ifndef DEBUG
#define NDEBUG
#endif

#include <assert.h>
#include <errno.h>
#include <ctype.h>
#include <signal.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <time.h>

#include <curses.h>

static void die(const char *err, ...);
static void report(const char *msg, ...);
static void set_nonblocking_input(bool loading);

#define ABS(x)		((x) >= 0  ? (x) : -(x))
#define MIN(x, y)	((x) < (y) ? (x) :  (y))

#define ARRAY_SIZE(x)	(sizeof(x) / sizeof(x[0]))
#define STRING_SIZE(x)	(sizeof(x) - 1)

#define SIZEOF_REF	256	/* Size of symbolic or SHA1 ID. */
#define SIZEOF_CMD	1024	/* Size of command buffer. */

/* This color name can be used to refer to the default term colors. */
#define COLOR_DEFAULT	(-1)

#define TIG_HELP	"(d)iff, (l)og, (m)ain, (q)uit, (h)elp, (Enter) show diff"

/* The format and size of the date column in the main view. */
#define DATE_FORMAT	"%Y-%m-%d %H:%M"
#define DATE_COLS	STRING_SIZE("2006-04-29 14:21 ")

/* The default interval between line numbers. */
#define NUMBER_INTERVAL	1

#define TABSIZE		8

#define	SCALE_SPLIT_VIEW(height)	((height) * 2 / 3)

/* Some ascii-shorthands fitted into the ncurses namespace. */
#define KEY_TAB		'\t'
#define KEY_RETURN	'\r'
#define KEY_ESC		27


/* User action requests. */
enum request {
	/* Offset all requests to avoid conflicts with ncurses getch values. */
	REQ_OFFSET = KEY_MAX + 1,

	/* XXX: Keep the view request first and in sync with views[]. */
	REQ_VIEW_MAIN,
	REQ_VIEW_DIFF,
	REQ_VIEW_LOG,
	REQ_VIEW_HELP,
	REQ_VIEW_PAGER,

	REQ_ENTER,
	REQ_QUIT,
	REQ_PROMPT,
	REQ_SCREEN_REDRAW,
	REQ_SCREEN_RESIZE,
	REQ_SCREEN_UPDATE,
	REQ_SHOW_VERSION,
	REQ_STOP_LOADING,
	REQ_TOGGLE_LINE_NUMBERS,
	REQ_VIEW_NEXT,

	REQ_MOVE_UP,
	REQ_MOVE_UP_ENTER,
	REQ_MOVE_DOWN,
	REQ_MOVE_DOWN_ENTER,
	REQ_MOVE_PAGE_UP,
	REQ_MOVE_PAGE_DOWN,
	REQ_MOVE_FIRST_LINE,
	REQ_MOVE_LAST_LINE,

	REQ_SCROLL_LINE_UP,
	REQ_SCROLL_LINE_DOWN,
	REQ_SCROLL_PAGE_UP,
	REQ_SCROLL_PAGE_DOWN,
};

struct ref {
	char *name;		/* Ref name; tag or head names are shortened. */
	char id[41];		/* Commit SHA1 ID */
	unsigned int tag:1;	/* Is it a tag? */
	unsigned int next:1;	/* For ref lists: are there more refs? */
};

struct commit {
	char id[41];		/* SHA1 ID. */
	char title[75];		/* The first line of the commit message. */
	char author[75];	/* The author of the commit. */
	struct tm time;		/* Date from the author ident. */
	struct ref **refs;	/* Repository references; tags & branch heads. */
};


/*
 * String helpers
 */

static inline void
string_ncopy(char *dst, char *src, int dstlen)
{
	strncpy(dst, src, dstlen - 1);
	dst[dstlen - 1] = 0;

}

/* Shorthand for safely copying into a fixed buffer. */
#define string_copy(dst, src) \
	string_ncopy(dst, src, sizeof(dst))


/* Shell quoting
 *
 * NOTE: The following is a slightly modified copy of the git project's shell
 * quoting routines found in the quote.c file.
 *
 * Help to copy the thing properly quoted for the shell safety.  any single
 * quote is replaced with '\'', any exclamation point is replaced with '\!',
 * and the whole thing is enclosed in a
 *
 * E.g.
 *  original     sq_quote     result
 *  name     ==> name      ==> 'name'
 *  a b      ==> a b       ==> 'a b'
 *  a'b      ==> a'\''b    ==> 'a'\''b'
 *  a!b      ==> a'\!'b    ==> 'a'\!'b'
 */

static size_t
sq_quote(char buf[SIZEOF_CMD], size_t bufsize, const char *src)
{
	char c;

#define BUFPUT(x) ( (bufsize < SIZEOF_CMD) && (buf[bufsize++] = (x)) )

	BUFPUT('\'');
	while ((c = *src++)) {
		if (c == '\'' || c == '!') {
			BUFPUT('\'');
			BUFPUT('\\');
			BUFPUT(c);
			BUFPUT('\'');
		} else {
			BUFPUT(c);
		}
	}
	BUFPUT('\'');

	return bufsize;
}


/**
 * OPTIONS
 * -------
 **/

/* Option and state variables. */
static bool opt_line_number	= FALSE;
static int opt_num_interval	= NUMBER_INTERVAL;
static int opt_tab_size		= TABSIZE;
static enum request opt_request = REQ_VIEW_MAIN;
static char opt_cmd[SIZEOF_CMD]	= "";
static FILE *opt_pipe		= NULL;

/* Returns the index of log or diff command or -1 to exit. */
static bool
parse_options(int argc, char *argv[])
{
	int i;

	for (i = 1; i < argc; i++) {
		char *opt = argv[i];

		/**
		 * -l::
		 *	Start up in log view using the internal log command.
		 **/
		if (!strcmp(opt, "-l")) {
			opt_request = REQ_VIEW_LOG;
			continue;
		}

		/**
		 * -d::
		 *	Start up in diff view using the internal diff command.
		 **/
		if (!strcmp(opt, "-d")) {
			opt_request = REQ_VIEW_DIFF;
			continue;
		}

		/**
		 * -n[INTERVAL], --line-number[=INTERVAL]::
		 *	Prefix line numbers in log and diff view.
		 *	Optionally, with interval different than each line.
		 **/
		if (!strncmp(opt, "-n", 2) ||
		    !strncmp(opt, "--line-number", 13)) {
			char *num = opt;

			if (opt[1] == 'n') {
				num = opt + 2;

			} else if (opt[STRING_SIZE("--line-number")] == '=') {
				num = opt + STRING_SIZE("--line-number=");
			}

			if (isdigit(*num))
				opt_num_interval = atoi(num);

			opt_line_number = TRUE;
			continue;
		}

		/**
		 * -t[NSPACES], --tab-size[=NSPACES]::
		 *	Set the number of spaces tabs should be expanded to.
		 **/
		if (!strncmp(opt, "-t", 2) ||
		    !strncmp(opt, "--tab-size", 10)) {
			char *num = opt;

			if (opt[1] == 't') {
				num = opt + 2;

			} else if (opt[STRING_SIZE("--tab-size")] == '=') {
				num = opt + STRING_SIZE("--tab-size=");
			}

			if (isdigit(*num))
				opt_tab_size = MIN(atoi(num), TABSIZE);
			continue;
		}

		/**
		 * -v, --version::
		 *	Show version and exit.
		 **/
		if (!strcmp(opt, "-v") ||
		    !strcmp(opt, "--version")) {
			printf("tig version %s\n", VERSION);
			return FALSE;
		}

		/**
		 * \--::
		 *	End of tig(1) options. Useful when specifying command
		 *	options for the main view. Example:
		 *
		 *		$ tig -- --since=1.month
		 **/
		if (!strcmp(opt, "--")) {
			i++;
			break;
		}

		/**
		 * log [git log options]::
		 *	Open log view using the given git log options.
		 *
		 * diff [git diff options]::
		 *	Open diff view using the given git diff options.
		 *
		 * show [git show options]::
		 *	Open diff view using the given git show options.
		 **/
		if (!strcmp(opt, "log") ||
		    !strcmp(opt, "diff") ||
		    !strcmp(opt, "show")) {
			opt_request = opt[0] == 'l'
				    ? REQ_VIEW_LOG : REQ_VIEW_DIFF;
			break;
		}

		/**
		 * [git log options]::
		 *	tig(1) will stop the option parsing when the first
		 *	command line parameter not starting with "-" is
		 *	encountered. All options including this one will be
		 *	passed to git log when loading the main view.
		 *	This makes it possible to say:
		 *
		 *	$ tig tag-1.0..HEAD
		 **/
		if (opt[0] && opt[0] != '-')
			break;

		die("unknown command '%s'", opt);
	}

	if (!isatty(STDIN_FILENO)) {
		/**
		 * Pager mode
		 * ~~~~~~~~~~
		 * If stdin is a pipe, any log or diff options will be ignored and the
		 * pager view will be opened loading data from stdin. The pager mode
		 * can be used for colorizing output from various git commands.
		 *
		 * Example on how to colorize the output of git-show(1):
		 *
		 *	$ git show | tig
		 **/
		opt_request = REQ_VIEW_PAGER;
		opt_pipe = stdin;

	} else if (i < argc) {
		size_t buf_size;

		/**
		 * Git command options
		 * ~~~~~~~~~~~~~~~~~~~
		 * All git command options specified on the command line will
		 * be passed to the given command and all will be shell quoted
		 * before they are passed to the shell.
		 *
		 * NOTE: If you specify options for the main view, you should
		 * not use the `--pretty` option as this option will be set
		 * automatically to the format expected by the main view.
		 *
		 * Example on how to open the log view and show both author and
		 * committer information:
		 *
		 *	$ tig log --pretty=fuller
		 *
		 * See the <<refspec, "Specifying revisions">> section below
		 * for an introduction to revision options supported by the git
		 * commands. For details on specific git command options, refer
		 * to the man page of the command in question.
		 **/

		if (opt_request == REQ_VIEW_MAIN)
			/* XXX: This is vulnerable to the user overriding
			 * options required for the main view parser. */
			string_copy(opt_cmd, "git log --stat --pretty=raw");
		else
			string_copy(opt_cmd, "git");
		buf_size = strlen(opt_cmd);

		while (buf_size < sizeof(opt_cmd) && i < argc) {
			opt_cmd[buf_size++] = ' ';
			buf_size = sq_quote(opt_cmd, buf_size, argv[i++]);
		}

		if (buf_size >= sizeof(opt_cmd))
			die("command too long");

		opt_cmd[buf_size] = 0;

	}

	return TRUE;
}


/*
 * Line-oriented content detection.
 */

#define LINE_INFO \
/*   Line type	   String to match	Foreground	Background	Attributes
 *   ---------     ---------------      ----------      ----------      ---------- */ \
/* Diff markup */ \
LINE(DIFF,	   "diff --git ",	COLOR_YELLOW,	COLOR_DEFAULT,	0), \
LINE(DIFF_INDEX,   "index ",		COLOR_BLUE,	COLOR_DEFAULT,	0), \
LINE(DIFF_CHUNK,   "@@",		COLOR_MAGENTA,	COLOR_DEFAULT,	0), \
LINE(DIFF_ADD,	   "+",			COLOR_GREEN,	COLOR_DEFAULT,	0), \
LINE(DIFF_DEL,	   "-",			COLOR_RED,	COLOR_DEFAULT,	0), \
LINE(DIFF_OLDMODE, "old file mode ",	COLOR_YELLOW,	COLOR_DEFAULT,	0), \
LINE(DIFF_NEWMODE, "new file mode ",	COLOR_YELLOW,	COLOR_DEFAULT,	0), \
LINE(DIFF_COPY,	   "copy ",		COLOR_YELLOW,	COLOR_DEFAULT,	0), \
LINE(DIFF_RENAME,  "rename ",		COLOR_YELLOW,	COLOR_DEFAULT,	0), \
LINE(DIFF_SIM,	   "similarity ",	COLOR_YELLOW,	COLOR_DEFAULT,	0), \
LINE(DIFF_DISSIM,  "dissimilarity ",	COLOR_YELLOW,	COLOR_DEFAULT,	0), \
/* Pretty print commit header */ \
LINE(PP_AUTHOR,	   "Author: ",		COLOR_CYAN,	COLOR_DEFAULT,	0), \
LINE(PP_COMMIT,	   "Commit: ",		COLOR_MAGENTA,	COLOR_DEFAULT,	0), \
LINE(PP_MERGE,	   "Merge: ",		COLOR_BLUE,	COLOR_DEFAULT,	0), \
LINE(PP_DATE,	   "Date:   ",		COLOR_YELLOW,	COLOR_DEFAULT,	0), \
LINE(PP_ADATE,	   "AuthorDate: ",	COLOR_YELLOW,	COLOR_DEFAULT,	0), \
LINE(PP_CDATE,	   "CommitDate: ",	COLOR_YELLOW,	COLOR_DEFAULT,	0), \
/* Raw commit header */ \
LINE(COMMIT,	   "commit ",		COLOR_GREEN,	COLOR_DEFAULT,	0), \
LINE(PARENT,	   "parent ",		COLOR_BLUE,	COLOR_DEFAULT,	0), \
LINE(TREE,	   "tree ",		COLOR_BLUE,	COLOR_DEFAULT,	0), \
LINE(AUTHOR,	   "author ",		COLOR_CYAN,	COLOR_DEFAULT,	0), \
LINE(COMMITTER,	   "committer ",	COLOR_MAGENTA,	COLOR_DEFAULT,	0), \
/* Misc */ \
LINE(DIFF_TREE,	   "diff-tree ",	COLOR_BLUE,	COLOR_DEFAULT,	0), \
LINE(SIGNOFF,	   "    Signed-off-by", COLOR_YELLOW,	COLOR_DEFAULT,	0), \
/* UI colors */ \
LINE(DEFAULT,	   "",			COLOR_DEFAULT,	COLOR_DEFAULT,	A_NORMAL), \
LINE(CURSOR,	   "",			COLOR_WHITE,	COLOR_GREEN,	A_BOLD), \
LINE(STATUS,	   "",			COLOR_GREEN,	COLOR_DEFAULT,	0), \
LINE(TITLE_BLUR,   "",			COLOR_WHITE,	COLOR_BLUE,	0), \
LINE(TITLE_FOCUS,  "",			COLOR_WHITE,	COLOR_BLUE,	A_BOLD), \
LINE(MAIN_DATE,    "",			COLOR_BLUE,	COLOR_DEFAULT,	0), \
LINE(MAIN_AUTHOR,  "",			COLOR_GREEN,	COLOR_DEFAULT,	0), \
LINE(MAIN_COMMIT,  "",			COLOR_DEFAULT,	COLOR_DEFAULT,	0), \
LINE(MAIN_DELIM,   "",			COLOR_MAGENTA,	COLOR_DEFAULT,	0), \
LINE(MAIN_TAG,     "",			COLOR_MAGENTA,	COLOR_DEFAULT,	A_BOLD), \
LINE(MAIN_REF,     "",			COLOR_CYAN,	COLOR_DEFAULT,	A_BOLD),

enum line_type {
#define LINE(type, line, fg, bg, attr) \
	LINE_##type
	LINE_INFO
#undef	LINE
};

struct line_info {
	char *line;		/* The start of line to match. */
	int linelen;		/* Size of string to match. */
	int fg, bg, attr;	/* Color and text attributes for the lines. */
};

static struct line_info line_info[] = {
#define LINE(type, line, fg, bg, attr) \
	{ (line), STRING_SIZE(line), (fg), (bg), (attr) }
	LINE_INFO
#undef	LINE
};

static enum line_type
get_line_type(char *line)
{
	int linelen = strlen(line);
	enum line_type type;

	for (type = 0; type < ARRAY_SIZE(line_info); type++)
		/* Case insensitive search matches Signed-off-by lines better. */
		if (linelen >= line_info[type].linelen &&
		    !strncasecmp(line_info[type].line, line, line_info[type].linelen))
			return type;

	return LINE_DEFAULT;
}

static inline int
get_line_attr(enum line_type type)
{
	assert(type < ARRAY_SIZE(line_info));
	return COLOR_PAIR(type) | line_info[type].attr;
}

static void
init_colors(void)
{
	int default_bg = COLOR_BLACK;
	int default_fg = COLOR_WHITE;
	enum line_type type;

	start_color();

	if (use_default_colors() != ERR) {
		default_bg = -1;
		default_fg = -1;
	}

	for (type = 0; type < ARRAY_SIZE(line_info); type++) {
		struct line_info *info = &line_info[type];
		int bg = info->bg == COLOR_DEFAULT ? default_bg : info->bg;
		int fg = info->fg == COLOR_DEFAULT ? default_fg : info->fg;

		init_pair(type, fg, bg);
	}
}


/**
 * ENVIRONMENT VARIABLES
 * ---------------------
 * Several options related to the interface with git can be configured
 * via environment options.
 *
 * Repository references
 * ~~~~~~~~~~~~~~~~~~~~~
 * Commits that are referenced by tags and branch heads will be marked
 * by the reference name surrounded by '[' and ']':
 *
 *	2006-03-26 19:42 Petr Baudis         | [cogito-0.17.1] Cogito 0.17.1
 *
 * If you want to filter out certain directories under `.git/refs/`, say
 * `tmp` you can do it by setting the following variable:
 *
 *	$ TIG_LS_REMOTE="git ls-remote . | sed /\/tmp\//d" tig
 *
 * Or set the variable permanently in your environment.
 *
 * TIG_LS_REMOTE::
 *	Set command for retrieving all repository references. The command
 *	should output data in the same format as git-ls-remote(1).
 **/

#define TIG_LS_REMOTE \
	"git ls-remote . 2>/dev/null"

/**
 * [[view-commands]]
 * View commands
 * ~~~~~~~~~~~~~
 * It is possible to alter which commands are used for the different views.
 * If for example you prefer commits in the main view to be sorted by date
 * and only show 500 commits, use:
 *
 *	$ TIG_MAIN_CMD="git log --date-order -n500 --pretty=raw %s" tig
 *
 * Or set the variable permanently in your environment.
 *
 * Notice, how `%s` is used to specify the commit reference. There can
 * be a maximum of 5 `%s` ref specifications.
 *
 * TIG_DIFF_CMD::
 *	The command used for the diff view. By default, git show is used
 *	as a backend.
 *
 * TIG_LOG_CMD::
 *	The command used for the log view. If you prefer to have both
 *	author and committer shown in the log view be sure to pass
 *	`--pretty=fuller` to git log.
 *
 * TIG_MAIN_CMD::
 *	The command used for the main view. Note, you must always specify
 *	the option: `--pretty=raw` since the main view parser expects to
 *	read that format.
 **/

#define TIG_DIFF_CMD \
	"git show --patch-with-stat --find-copies-harder -B -C %s"

#define TIG_LOG_CMD	\
	"git log --cc --stat -n100 %s"

#define TIG_MAIN_CMD \
	"git log --topo-order --stat --pretty=raw %s"

/* ... silently ignore that the following are also exported. */

#define TIG_HELP_CMD \
	"man tig 2>/dev/null"

#define TIG_PAGER_CMD \
	""

/**
 * The viewer
 * ----------
 *
 * tig(1) presents various 'views' of a repository. Each view is based on output
 * from an external command, most often 'git log', 'git diff', or 'git show'.
 *
 * The main view::
 *	Is the default view, and it shows a one line summary of each commit
 *	in the chosen list of revisions. The summary includes commit date,
 *	author, and the first line of the log message. Additionally, any
 *	repository references, such as tags, will be shown.
 *
 * The log view::
 *	Presents a more rich view of the revision log showing the whole log
 *	message and the diffstat.
 *
 * The diff view::
 *	Shows either the diff of the current working tree, that is, what
 *	has changed since the last commit, or the commit diff complete
 *	with log message, diffstat and diff.
 *
 * The pager view::
 *	Is used for displaying both input from stdin and output from git
 *	commands entered in the internal prompt.
 *
 * The help view::
 *	Displays the information from the tig(1) man page. For the help view
 *	to work you need to have the tig(1) man page installed.
 **/

struct view {
	const char *name;	/* View name */
	char *cmd_fmt;		/* Default command line format */
	char *cmd_env;		/* Command line set via environment */
	char *id;		/* Points to either of ref_{head,commit} */
	size_t objsize;		/* Size of objects in the line index */

	struct view_ops {
		/* What type of content being displayed. Used in the
		 * title bar. */
		char *type;
		/* Draw one line; @lineno must be < view->height. */
		bool (*draw)(struct view *view, unsigned int lineno);
		/* Read one line; updates view->line. */
		bool (*read)(struct view *view, char *line);
		/* Depending on view, change display based on current line. */
		bool (*enter)(struct view *view);
	} *ops;

	char cmd[SIZEOF_CMD];	/* Command buffer */
	char ref[SIZEOF_REF];	/* Hovered commit reference */
	char vid[SIZEOF_REF];	/* View ID. Set to id member when updating. */

	int height, width;	/* The width and height of the main window */
	WINDOW *win;		/* The main window */
	WINDOW *title;		/* The title window living below the main window */

	/* Navigation */
	unsigned long offset;	/* Offset of the window top */
	unsigned long lineno;	/* Current line number */

	/* Buffering */
	unsigned long lines;	/* Total number of lines */
	void **line;		/* Line index; each line contains user data */
	unsigned int digits;	/* Number of digits in the lines member. */

	/* Loading */
	FILE *pipe;
	time_t start_time;
};

static struct view_ops pager_ops;
static struct view_ops main_ops;

static char ref_head[SIZEOF_REF]	= "HEAD";
static char ref_commit[SIZEOF_REF]	= "HEAD";

#define VIEW_STR(name, cmd, env, ref, objsize, ops) \
	{ name, cmd, #env, ref, objsize, ops }

#define VIEW_(id, name, ops, ref, objsize) \
	VIEW_STR(name, TIG_##id##_CMD,  TIG_##id##_CMD, ref, objsize, ops)

static struct view views[] = {
	VIEW_(MAIN,  "main",  &main_ops,  ref_head,   sizeof(struct commit)),
	VIEW_(DIFF,  "diff",  &pager_ops, ref_commit, sizeof(char)),
	VIEW_(LOG,   "log",   &pager_ops, ref_head,   sizeof(char)),
	VIEW_(HELP,  "help",  &pager_ops, ref_head,   sizeof(char)),
	VIEW_(PAGER, "pager", &pager_ops, "static",   sizeof(char)),
};

#define VIEW(req) (&views[(req) - REQ_OFFSET - 1])

/* The display array of active views and the index of the current view. */
static struct view *display[2];
static unsigned int current_view;

#define foreach_view(view, i) \
	for (i = 0; i < ARRAY_SIZE(display) && (view = display[i]); i++)


static void
redraw_view_from(struct view *view, int lineno)
{
	assert(0 <= lineno && lineno < view->height);

	for (; lineno < view->height; lineno++) {
		if (!view->ops->draw(view, lineno))
			break;
	}

	redrawwin(view->win);
	wrefresh(view->win);
}

static void
redraw_view(struct view *view)
{
	wclear(view->win);
	redraw_view_from(view, 0);
}

static void
resize_display(void)
{
	int offset, i;
	struct view *base = display[0];
	struct view *view = display[1] ? display[1] : display[0];

	/* Setup window dimensions */

	getmaxyx(stdscr, base->height, base->width);

	/* Make room for the status window. */
	base->height -= 1;

	if (view != base) {
		/* Horizontal split. */
		view->width   = base->width;
		view->height  = SCALE_SPLIT_VIEW(base->height);
		base->height -= view->height;

		/* Make room for the title bar. */
		view->height -= 1;
	}

	/* Make room for the title bar. */
	base->height -= 1;

	offset = 0;

	foreach_view (view, i) {
		/* Keep the size of the all view windows one lager than is
		 * required. This makes current line management easier when the
		 * cursor will go outside the window. */
		if (!view->win) {
			view->win = newwin(view->height + 1, 0, offset, 0);
			if (!view->win)
				die("Failed to create %s view", view->name);

			scrollok(view->win, TRUE);

			view->title = newwin(1, 0, offset + view->height, 0);
			if (!view->title)
				die("Failed to create title window");

		} else {
			wresize(view->win, view->height + 1, view->width);
			mvwin(view->win,   offset, 0);
			mvwin(view->title, offset + view->height, 0);
			wrefresh(view->win);
		}

		offset += view->height + 1;
	}
}

static void
update_view_title(struct view *view)
{
	if (view == display[current_view])
		wbkgdset(view->title, get_line_attr(LINE_TITLE_FOCUS));
	else
		wbkgdset(view->title, get_line_attr(LINE_TITLE_BLUR));

	werase(view->title);
	wmove(view->title, 0, 0);

	/* [main] ref: 334b506... - commit 6 of 4383 (0%) */

	if (*view->ref)
		wprintw(view->title, "[%s] %s", view->name, view->ref);
	else
		wprintw(view->title, "[%s]", view->name);

	if (view->lines) {
		wprintw(view->title, " - %s %d of %d (%d%%)",
			view->ops->type,
			view->lineno + 1,
			view->lines,
			(view->lineno + 1) * 100 / view->lines);
	}

	wrefresh(view->title);
}

/*
 * Navigation
 */

/* Scrolling backend */
static void
do_scroll_view(struct view *view, int lines)
{
	/* The rendering expects the new offset. */
	view->offset += lines;

	assert(0 <= view->offset && view->offset < view->lines);
	assert(lines);

	/* Redraw the whole screen if scrolling is pointless. */
	if (view->height < ABS(lines)) {
		redraw_view(view);

	} else {
		int line = lines > 0 ? view->height - lines : 0;
		int end = line + ABS(lines);

		wscrl(view->win, lines);

		for (; line < end; line++) {
			if (!view->ops->draw(view, line))
				break;
		}
	}

	/* Move current line into the view. */
	if (view->lineno < view->offset) {
		view->lineno = view->offset;
		view->ops->draw(view, 0);

	} else if (view->lineno >= view->offset + view->height) {
		if (view->lineno == view->offset + view->height) {
			/* Clear the hidden line so it doesn't show if the view
			 * is scrolled up. */
			wmove(view->win, view->height, 0);
			wclrtoeol(view->win);
		}
		view->lineno = view->offset + view->height - 1;
		view->ops->draw(view, view->lineno - view->offset);
	}

	assert(view->offset <= view->lineno && view->lineno < view->lines);

	redrawwin(view->win);
	wrefresh(view->win);
	report("");
}

/* Scroll frontend */
static void
scroll_view(struct view *view, enum request request)
{
	int lines = 1;

	switch (request) {
	case REQ_SCROLL_PAGE_DOWN:
		lines = view->height;
	case REQ_SCROLL_LINE_DOWN:
		if (view->offset + lines > view->lines)
			lines = view->lines - view->offset;

		if (lines == 0 || view->offset + view->height >= view->lines) {
			report("Cannot scroll beyond the last line");
			return;
		}
		break;

	case REQ_SCROLL_PAGE_UP:
		lines = view->height;
	case REQ_SCROLL_LINE_UP:
		if (lines > view->offset)
			lines = view->offset;

		if (lines == 0) {
			report("Cannot scroll beyond the first line");
			return;
		}

		lines = -lines;
		break;

	default:
		die("request %d not handled in switch", request);
	}

	do_scroll_view(view, lines);
}

/* Cursor moving */
static void
move_view(struct view *view, enum request request)
{
	int steps;

	switch (request) {
	case REQ_MOVE_FIRST_LINE:
		steps = -view->lineno;
		break;

	case REQ_MOVE_LAST_LINE:
		steps = view->lines - view->lineno - 1;
		break;

	case REQ_MOVE_PAGE_UP:
		steps = view->height > view->lineno
		      ? -view->lineno : -view->height;
		break;

	case REQ_MOVE_PAGE_DOWN:
		steps = view->lineno + view->height >= view->lines
		      ? view->lines - view->lineno - 1 : view->height;
		break;

	case REQ_MOVE_UP:
	case REQ_MOVE_UP_ENTER:
		steps = -1;
		break;

	case REQ_MOVE_DOWN:
	case REQ_MOVE_DOWN_ENTER:
		steps = 1;
		break;

	default:
		die("request %d not handled in switch", request);
	}

	if (steps <= 0 && view->lineno == 0) {
		report("Cannot move beyond the first line");
		return;

	} else if (steps >= 0 && view->lineno + 1 >= view->lines) {
		report("Cannot move beyond the last line");
		return;
	}

	/* Move the current line */
	view->lineno += steps;
	assert(0 <= view->lineno && view->lineno < view->lines);

	/* Repaint the old "current" line if we be scrolling */
	if (ABS(steps) < view->height) {
		int prev_lineno = view->lineno - steps - view->offset;

		wmove(view->win, prev_lineno, 0);
		wclrtoeol(view->win);
		view->ops->draw(view, prev_lineno);
	}

	/* Check whether the view needs to be scrolled */
	if (view->lineno < view->offset ||
	    view->lineno >= view->offset + view->height) {
		if (steps < 0 && -steps > view->offset) {
			steps = -view->offset;

		} else if (steps > 0) {
			if (view->lineno == view->lines - 1 &&
			    view->lines > view->height) {
				steps = view->lines - view->offset - 1;
				if (steps >= view->height)
					steps -= view->height - 1;
			}
		}

		do_scroll_view(view, steps);
		return;
	}

	/* Draw the current line */
	view->ops->draw(view, view->lineno - view->offset);

	redrawwin(view->win);
	wrefresh(view->win);
	report("");
}


/*
 * Incremental updating
 */

static bool
begin_update(struct view *view)
{
	char *id = view->id;

	if (opt_cmd[0]) {
		string_copy(view->cmd, opt_cmd);
		opt_cmd[0] = 0;
		/* When running random commands, the view ref could have become
		 * invalid so clear it. */
		view->ref[0] = 0;
	} else {
		char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;

		if (snprintf(view->cmd, sizeof(view->cmd), format,
			     id, id, id, id, id) >= sizeof(view->cmd))
			return FALSE;
	}

	/* Special case for the pager view. */
	if (opt_pipe) {
		view->pipe = opt_pipe;
		opt_pipe = NULL;
	} else {
		view->pipe = popen(view->cmd, "r");
	}

	if (!view->pipe)
		return FALSE;

	set_nonblocking_input(TRUE);

	view->offset = 0;
	view->lines  = 0;
	view->lineno = 0;
	string_copy(view->vid, id);

	if (view->line) {
		int i;

		for (i = 0; i < view->lines; i++)
			if (view->line[i])
				free(view->line[i]);

		free(view->line);
		view->line = NULL;
	}

	view->start_time = time(NULL);

	return TRUE;
}

static void
end_update(struct view *view)
{
	if (!view->pipe)
		return;
	set_nonblocking_input(FALSE);
	if (view->pipe == stdin)
		fclose(view->pipe);
	else
		pclose(view->pipe);
	view->pipe = NULL;
}

static bool
update_view(struct view *view)
{
	char buffer[BUFSIZ];
	char *line;
	void **tmp;
	/* The number of lines to read. If too low it will cause too much
	 * redrawing (and possible flickering), if too high responsiveness
	 * will suffer. */
	unsigned long lines = view->height;
	int redraw_from = -1;

	if (!view->pipe)
		return TRUE;

	/* Only redraw if lines are visible. */
	if (view->offset + view->height >= view->lines)
		redraw_from = view->lines - view->offset;

	tmp = realloc(view->line, sizeof(*view->line) * (view->lines + lines));
	if (!tmp)
		goto alloc_error;

	view->line = tmp;

	while ((line = fgets(buffer, sizeof(buffer), view->pipe))) {
		int linelen = strlen(line);

		if (linelen)
			line[linelen - 1] = 0;

		if (!view->ops->read(view, line))
			goto alloc_error;

		if (lines-- == 1)
			break;
	}

	{
		int digits;

		lines = view->lines;
		for (digits = 0; lines; digits++)
			lines /= 10;

		/* Keep the displayed view in sync with line number scaling. */
		if (digits != view->digits) {
			view->digits = digits;
			redraw_from = 0;
		}
	}

	if (redraw_from >= 0) {
		/* If this is an incremental update, redraw the previous line
		 * since for commits some members could have changed when
		 * loading the main view. */
		if (redraw_from > 0)
			redraw_from--;

		/* Incrementally draw avoids flickering. */
		redraw_view_from(view, redraw_from);
	}

	/* Update the title _after_ the redraw so that if the redraw picks up a
	 * commit reference in view->ref it'll be available here. */
	update_view_title(view);

	if (ferror(view->pipe)) {
		report("Failed to read: %s", strerror(errno));
		goto end;

	} else if (feof(view->pipe)) {
		time_t secs = time(NULL) - view->start_time;

		if (view == VIEW(REQ_VIEW_HELP)) {
			char *msg = TIG_HELP;

			if (view->lines == 0) {
				/* Slightly ugly, but abusing view->ref keeps
				 * the error message. */
				string_copy(view->ref, "No help available");
				msg = "The tig(1) manpage is not installed";
			}

			report("%s", msg);
			goto end;
		}

		report("Loaded %d lines in %ld second%s", view->lines, secs,
		       secs == 1 ? "" : "s");
		goto end;
	}

	return TRUE;

alloc_error:
	report("Allocation failure");

end:
	end_update(view);
	return FALSE;
}

enum open_flags {
	OPEN_DEFAULT = 0,	/* Use default view switching. */
	OPEN_SPLIT = 1,		/* Split current view. */
	OPEN_BACKGROUNDED = 2,	/* Backgrounded. */
	OPEN_RELOAD = 4,	/* Reload view even if it is the current. */
};

static void
open_view(struct view *prev, enum request request, enum open_flags flags)
{
	bool backgrounded = !!(flags & OPEN_BACKGROUNDED);
	bool split = !!(flags & OPEN_SPLIT);
	bool reload = !!(flags & OPEN_RELOAD);
	struct view *view = VIEW(request);
	struct view *displayed;
	int nviews;

	/* Cycle between displayed views and count the views. */
	foreach_view (displayed, nviews) {
		if (prev != view &&
		    view == displayed &&
		    !strcmp(view->vid, prev->vid)) {
			current_view = nviews;
			/* Blur out the title of the previous view. */
			update_view_title(prev);
			report("");
			return;
		}
	}

	if (view == prev && nviews == 1 && !reload) {
		report("Already in %s view", view->name);
		return;
	}

	if ((reload || strcmp(view->vid, view->id)) &&
	    !begin_update(view)) {
		report("Failed to load %s view", view->name);
		return;
	}

	if (split) {
		display[current_view + 1] = view;
		if (!backgrounded)
			current_view++;
	} else {
		/* Maximize the current view. */
		memset(display, 0, sizeof(display));
		current_view = 0;
		display[current_view] = view;
	}

	resize_display();

	if (split && prev->lineno - prev->offset >= prev->height) {
		/* Take the title line into account. */
		int lines = prev->lineno - prev->offset - prev->height + 1;

		/* Scroll the view that was split if the current line is
		 * outside the new limited view. */
		do_scroll_view(prev, lines);
	}

	if (prev && view != prev) {
		/* "Blur" the previous view. */
		if (!backgrounded)
			update_view_title(prev);

		/* Continue loading split views in the background. */
		if (!split)
			end_update(prev);
	}

	if (view->pipe) {
		/* Clear the old view and let the incremental updating refill
		 * the screen. */
		wclear(view->win);
		report("Loading...");
	} else {
		redraw_view(view);
		if (view == VIEW(REQ_VIEW_HELP))
			report("%s", TIG_HELP);
		else
			report("");
	}

	/* If the view is backgrounded the above calls to report()
	 * won't redraw the view title. */
	if (backgrounded)
		update_view_title(view);
}


/*
 * User request switch noodle
 */

static int
view_driver(struct view *view, enum request request)
{
	int i;

	switch (request) {
	case REQ_MOVE_UP:
	case REQ_MOVE_DOWN:
	case REQ_MOVE_PAGE_UP:
	case REQ_MOVE_PAGE_DOWN:
	case REQ_MOVE_FIRST_LINE:
	case REQ_MOVE_LAST_LINE:
		move_view(view, request);
		break;

	case REQ_SCROLL_LINE_DOWN:
	case REQ_SCROLL_LINE_UP:
	case REQ_SCROLL_PAGE_DOWN:
	case REQ_SCROLL_PAGE_UP:
		scroll_view(view, request);
		break;

	case REQ_VIEW_MAIN:
	case REQ_VIEW_DIFF:
	case REQ_VIEW_LOG:
	case REQ_VIEW_HELP:
	case REQ_VIEW_PAGER:
		open_view(view, request, OPEN_DEFAULT);
		break;

	case REQ_MOVE_UP_ENTER:
	case REQ_MOVE_DOWN_ENTER:
		move_view(view, request);
		/* Fall-through */

	case REQ_ENTER:
		if (!view->lines) {
			report("Nothing to enter");
			break;
		}
		return view->ops->enter(view);

	case REQ_VIEW_NEXT:
	{
		int nviews = display[1] ? 2 : 1;
		int next_view = (current_view + 1) % nviews;

		if (next_view == current_view) {
			report("Only one view is displayed");
			break;
		}

		current_view = next_view;
		/* Blur out the title of the previous view. */
		update_view_title(view);
		report("");
		break;
	}
	case REQ_TOGGLE_LINE_NUMBERS:
		opt_line_number = !opt_line_number;
		redraw_view(view);
		update_view_title(view);
		break;

	case REQ_PROMPT:
		/* Always reload^Wrerun commands from the prompt. */
		open_view(view, opt_request, OPEN_RELOAD);
		break;

	case REQ_STOP_LOADING:
		foreach_view (view, i) {
			if (view->pipe)
				report("Stopped loaded the %s view", view->name),
			end_update(view);
		}
		break;

	case REQ_SHOW_VERSION:
		report("Version: %s", VERSION);
		return TRUE;

	case REQ_SCREEN_RESIZE:
		resize_display();
		/* Fall-through */
	case REQ_SCREEN_REDRAW:
		foreach_view (view, i) {
			redraw_view(view);
			update_view_title(view);
		}
		break;

	case REQ_SCREEN_UPDATE:
		doupdate();
		return TRUE;

	case REQ_QUIT:
		return FALSE;

	default:
		/* An unknown key will show most commonly used commands. */
		report("Unknown key, press 'h' for help");
		return TRUE;
	}

	return TRUE;
}


/*
 * View backend handlers
 */

static bool
pager_draw(struct view *view, unsigned int lineno)
{
	enum line_type type;
	char *line;
	int linelen;
	int attr;

	if (view->offset + lineno >= view->lines)
		return FALSE;

	line = view->line[view->offset + lineno];
	type = get_line_type(line);

	wmove(view->win, lineno, 0);

	if (view->offset + lineno == view->lineno) {
		if (type == LINE_COMMIT) {
			string_copy(view->ref, line + 7);
			string_copy(ref_commit, view->ref);
		}

		type = LINE_CURSOR;
		wchgat(view->win, -1, 0, type, NULL);
	}

	attr = get_line_attr(type);
	wattrset(view->win, attr);

	linelen = strlen(line);

	if (opt_line_number || opt_tab_size < TABSIZE) {
		static char spaces[] = "                    ";
		int col_offset = 0, col = 0;

		if (opt_line_number) {
			unsigned long real_lineno = view->offset + lineno + 1;

			if (real_lineno == 1 ||
			    (real_lineno % opt_num_interval) == 0) {
				wprintw(view->win, "%.*d", view->digits, real_lineno);

			} else {
				waddnstr(view->win, spaces,
					 MIN(view->digits, STRING_SIZE(spaces)));
			}
			waddstr(view->win, ": ");
			col_offset = view->digits + 2;
		}

		while (line && col_offset + col < view->width) {
			int cols_max = view->width - col_offset - col;
			char *text = line;
			int cols;

			if (*line == '\t') {
				assert(sizeof(spaces) > TABSIZE);
				line++;
				text = spaces;
				cols = opt_tab_size - (col % opt_tab_size);

			} else {
				line = strchr(line, '\t');
				cols = line ? line - text : strlen(text);
			}

			waddnstr(view->win, text, MIN(cols, cols_max));
			col += cols;
		}

	} else {
		int col = 0, pos = 0;

		for (; pos < linelen && col < view->width; pos++, col++)
			if (line[pos] == '\t')
				col += TABSIZE - (col % TABSIZE) - 1;

		waddnstr(view->win, line, pos);
	}

	return TRUE;
}

static bool
pager_read(struct view *view, char *line)
{
	/* Compress empty lines in the help view. */
	if (view == VIEW(REQ_VIEW_HELP) &&
	    !*line &&
	    view->lines &&
	    !*((char *) view->line[view->lines - 1]))
		return TRUE;

	view->line[view->lines] = strdup(line);
	if (!view->line[view->lines])
		return FALSE;

	view->lines++;
	return TRUE;
}

static bool
pager_enter(struct view *view)
{
	char *line = view->line[view->lineno];

	if (get_line_type(line) == LINE_COMMIT) {
		if (view == VIEW(REQ_VIEW_LOG))
			open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT | OPEN_BACKGROUNDED);
		else
			open_view(view, REQ_VIEW_DIFF, OPEN_DEFAULT);
	}

	return TRUE;
}

static struct view_ops pager_ops = {
	"line",
	pager_draw,
	pager_read,
	pager_enter,
};


static struct ref **get_refs(char *id);

static bool
main_draw(struct view *view, unsigned int lineno)
{
	char buf[DATE_COLS + 1];
	struct commit *commit;
	enum line_type type;
	int col = 0;
	size_t timelen;

	if (view->offset + lineno >= view->lines)
		return FALSE;

	commit = view->line[view->offset + lineno];
	if (!*commit->author)
		return FALSE;

	wmove(view->win, lineno, col);

	if (view->offset + lineno == view->lineno) {
		string_copy(view->ref, commit->id);
		string_copy(ref_commit, view->ref);
		type = LINE_CURSOR;
		wattrset(view->win, get_line_attr(type));
		wchgat(view->win, -1, 0, type, NULL);

	} else {
		type = LINE_MAIN_COMMIT;
		wattrset(view->win, get_line_attr(LINE_MAIN_DATE));
	}

	timelen = strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time);
	waddnstr(view->win, buf, timelen);
	waddstr(view->win, " ");

	col += DATE_COLS;
	wmove(view->win, lineno, col);
	if (type != LINE_CURSOR)
		wattrset(view->win, get_line_attr(LINE_MAIN_AUTHOR));

	if (strlen(commit->author) > 19) {
		waddnstr(view->win, commit->author, 18);
		if (type != LINE_CURSOR)
			wattrset(view->win, get_line_attr(LINE_MAIN_DELIM));
		waddch(view->win, '~');
	} else {
		waddstr(view->win, commit->author);
	}

	col += 20;
	if (type != LINE_CURSOR)
		wattrset(view->win, A_NORMAL);

	mvwaddch(view->win, lineno, col, ACS_LTEE);
	wmove(view->win, lineno, col + 2);
	col += 2;

	if (commit->refs) {
		size_t i = 0;

		do {
			if (type == LINE_CURSOR)
				;
			else if (commit->refs[i]->tag)
				wattrset(view->win, get_line_attr(LINE_MAIN_TAG));
			else
				wattrset(view->win, get_line_attr(LINE_MAIN_REF));
			waddstr(view->win, "[");
			waddstr(view->win, commit->refs[i]->name);
			waddstr(view->win, "]");
			if (type != LINE_CURSOR)
				wattrset(view->win, A_NORMAL);
			waddstr(view->win, " ");
			col += strlen(commit->refs[i]->name) + STRING_SIZE("[] ");
		} while (commit->refs[i++]->next);
	}

	if (type != LINE_CURSOR)
		wattrset(view->win, get_line_attr(type));

	{
		int titlelen = strlen(commit->title);

		if (col + titlelen > view->width)
			titlelen = view->width - col;

		waddnstr(view->win, commit->title, titlelen);
	}

	return TRUE;
}

/* Reads git log --pretty=raw output and parses it into the commit struct. */
static bool
main_read(struct view *view, char *line)
{
	enum line_type type = get_line_type(line);
	struct commit *commit;

	switch (type) {
	case LINE_COMMIT:
		commit = calloc(1, sizeof(struct commit));
		if (!commit)
			return FALSE;

		line += STRING_SIZE("commit ");

		view->line[view->lines++] = commit;
		string_copy(commit->id, line);
		commit->refs = get_refs(commit->id);
		break;

	case LINE_AUTHOR:
	{
		char *ident = line + STRING_SIZE("author ");
		char *end = strchr(ident, '<');

		if (end) {
			for (; end > ident && isspace(end[-1]); end--) ;
			*end = 0;
		}

		commit = view->line[view->lines - 1];
		string_copy(commit->author, ident);

		/* Parse epoch and timezone */
		if (end) {
			char *secs = strchr(end + 1, '>');
			char *zone;
			time_t time;

			if (!secs || secs[1] != ' ')
				break;

			secs += 2;
			time = (time_t) atol(secs);
			zone = strchr(secs, ' ');
			if (zone && strlen(zone) == STRING_SIZE(" +0700")) {
				long tz;

				zone++;
				tz  = ('0' - zone[1]) * 60 * 60 * 10;
				tz += ('0' - zone[2]) * 60 * 60;
				tz += ('0' - zone[3]) * 60;
				tz += ('0' - zone[4]) * 60;

				if (zone[0] == '-')
					tz = -tz;

				time -= tz;
			}
			gmtime_r(&time, &commit->time);
		}
		break;
	}
	default:
		/* We should only ever end up here if there has already been a
		 * commit line, however, be safe. */
		if (view->lines == 0)
			break;

		/* Fill in the commit title if it has not already been set. */
		commit = view->line[view->lines - 1];
		if (commit->title[0])
			break;

		/* Require titles to start with a non-space character at the
		 * offset used by git log. */
		/* FIXME: More gracefull handling of titles; append "..." to
		 * shortened titles, etc. */
		if (strncmp(line, "    ", 4) ||
		    isspace(line[4]))
			break;

		string_copy(commit->title, line + 4);
	}

	return TRUE;
}

static bool
main_enter(struct view *view)
{
	open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT | OPEN_BACKGROUNDED);
	return TRUE;
}

static struct view_ops main_ops = {
	"commit",
	main_draw,
	main_read,
	main_enter,
};


/**
 * KEYS
 * ----
 * Below the default key bindings are shown.
 **/

struct keymap {
	int alias;
	int request;
};

static struct keymap keymap[] = {
	/**
	 * View switching
	 * ~~~~~~~~~~~~~~
	 * m::
	 *	Switch to main view.
	 * d::
	 *	Switch to diff view.
	 * l::
	 *	Switch to log view.
	 * p::
	 *	Switch to pager view.
	 * h::
	 *	Show man page.
	 * Return::
	 *	If on a commit line show the commit diff. Additionally, if in
	 *	main or log view this will split the view. To open the commit
	 *	diff in full size view either use 'd' or press Return twice.
	 * Tab::
	 *	Switch to next view.
	 **/
	{ 'm',		REQ_VIEW_MAIN },
	{ 'd',		REQ_VIEW_DIFF },
	{ 'l',		REQ_VIEW_LOG },
	{ 'p',		REQ_VIEW_PAGER },
	{ 'h',		REQ_VIEW_HELP },

	{ KEY_TAB,	REQ_VIEW_NEXT },
	{ KEY_RETURN,	REQ_ENTER },

	/**
	 * Cursor navigation
	 * ~~~~~~~~~~~~~~~~~
	 * Up::
	 *	Move cursor one line up.
	 * Down::
	 *	Move cursor one line down.
	 * k::
	 *	Move cursor one line up and enter. When used in the main view
	 *	this will always show the diff of the current commit in the
	 *	split diff view.
	 * j::
	 *	Move cursor one line down and enter.
	 * PgUp::
	 *	Move cursor one page up.
	 * PgDown::
	 *	Move cursor one page down.
	 * Home::
	 *	Jump to first line.
	 * End::
	 *	Jump to last line.
	 **/
	{ KEY_UP,	REQ_MOVE_UP },
	{ KEY_DOWN,	REQ_MOVE_DOWN },
	{ 'k',		REQ_MOVE_UP_ENTER },
	{ 'j',		REQ_MOVE_DOWN_ENTER },
	{ KEY_HOME,	REQ_MOVE_FIRST_LINE },
	{ KEY_END,	REQ_MOVE_LAST_LINE },
	{ KEY_NPAGE,	REQ_MOVE_PAGE_DOWN },
	{ KEY_PPAGE,	REQ_MOVE_PAGE_UP },

	/**
	 * Scrolling
	 * ~~~~~~~~~
	 * Insert::
	 *	Scroll view one line up.
	 * Delete::
	 *	Scroll view one line down.
	 * w::
	 *	Scroll view one page up.
	 * s::
	 *	Scroll view one page down.
	 **/
	{ KEY_IC,	REQ_SCROLL_LINE_UP },
	{ KEY_DC,	REQ_SCROLL_LINE_DOWN },
	{ 'w',		REQ_SCROLL_PAGE_UP },
	{ 's',		REQ_SCROLL_PAGE_DOWN },

	/**
	 * Misc
	 * ~~~~
	 * q::
	 *	Quit
	 * r::
	 *	Redraw screen.
	 * z::
	 *	Stop all background loading. This can be useful if you use
	 *	tig(1) in a repository with a long history without limiting
	 *	the revision log.
	 * v::
	 *	Show version.
	 * n::
	 *	Toggle line numbers on/off.
	 * ':'::
	 *	Open prompt. This allows you to specify what git command
	 *	to run. Example:
	 *
	 *	:log -p
	 **/
	{ 'q',		REQ_QUIT },
	{ 'z',		REQ_STOP_LOADING },
	{ 'v',		REQ_SHOW_VERSION },
	{ 'r',		REQ_SCREEN_REDRAW },
	{ 'n',		REQ_TOGGLE_LINE_NUMBERS },
	{ ':',		REQ_PROMPT },

	/* wgetch() with nodelay() enabled returns ERR when there's no input. */
	{ ERR,		REQ_SCREEN_UPDATE },

	/* Use the ncurses SIGWINCH handler. */
	{ KEY_RESIZE,	REQ_SCREEN_RESIZE },
};

static enum request
get_request(int key)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(keymap); i++)
		if (keymap[i].alias == key)
			return keymap[i].request;

	return (enum request) key;
}


/*
 * Status management
 */

/* Whether or not the curses interface has been initialized. */
bool cursed = FALSE;

/* The status window is used for polling keystrokes. */
static WINDOW *status_win;

/* Update status and title window. */
static void
report(const char *msg, ...)
{
	static bool empty = TRUE;
	struct view *view = display[current_view];

	if (!empty || *msg) {
		va_list args;

		va_start(args, msg);

		werase(status_win);
		wmove(status_win, 0, 0);
		if (*msg) {
			vwprintw(status_win, msg, args);
			empty = FALSE;
		} else {
			empty = TRUE;
		}
		wrefresh(status_win);

		va_end(args);
	}

	update_view_title(view);

	/* Move the cursor to the right-most column of the cursor line.
	 *
	 * XXX: This could turn out to be a bit expensive, but it ensures that
	 * the cursor does not jump around. */
	if (view->lines) {
		wmove(view->win, view->lineno - view->offset, view->width - 1);
		wrefresh(view->win);
	}
}

/* Controls when nodelay should be in effect when polling user input. */
static void
set_nonblocking_input(bool loading)
{
	static unsigned int loading_views;

	if ((loading == FALSE && loading_views-- == 1) ||
	    (loading == TRUE  && loading_views++ == 0))
		nodelay(status_win, loading);
}

static void
init_display(void)
{
	int x, y;

	/* Initialize the curses library */
	if (isatty(STDIN_FILENO)) {
		cursed = !!initscr();
	} else {
		/* Leave stdin and stdout alone when acting as a pager. */
		FILE *io = fopen("/dev/tty", "r+");

		cursed = !!newterm(NULL, io, io);
	}

	if (!cursed)
		die("Failed to initialize curses");

	nonl();         /* Tell curses not to do NL->CR/NL on output */
	cbreak();       /* Take input chars one at a time, no wait for \n */
	noecho();       /* Don't echo input */
	leaveok(stdscr, TRUE);

	if (has_colors())
		init_colors();

	getmaxyx(stdscr, y, x);
	status_win = newwin(1, 0, y - 1, 0);
	if (!status_win)
		die("Failed to create status window");

	/* Enable keyboard mapping */
	keypad(status_win, TRUE);
	wbkgdset(status_win, get_line_attr(LINE_STATUS));
}


/*
 * Repository references
 */

static struct ref *refs;
static size_t refs_size;

static struct ref **
get_refs(char *id)
{
	struct ref **id_refs = NULL;
	size_t id_refs_size = 0;
	size_t i;

	for (i = 0; i < refs_size; i++) {
		struct ref **tmp;

		if (strcmp(id, refs[i].id))
			continue;

		tmp = realloc(id_refs, (id_refs_size + 1) * sizeof(*id_refs));
		if (!tmp) {
			if (id_refs)
				free(id_refs);
			return NULL;
		}

		id_refs = tmp;
		if (id_refs_size > 0)
			id_refs[id_refs_size - 1]->next = 1;
		id_refs[id_refs_size] = &refs[i];

		/* XXX: The properties of the commit chains ensures that we can
		 * safely modify the shared ref. The repo references will
		 * always be similar for the same id. */
		id_refs[id_refs_size]->next = 0;
		id_refs_size++;
	}

	return id_refs;
}

static int
load_refs(void)
{
	char *cmd_env = getenv("TIG_LS_REMOTE");
	char *cmd = cmd_env && *cmd_env ? cmd_env : TIG_LS_REMOTE;
	FILE *pipe = popen(cmd, "r");
	char buffer[BUFSIZ];
	char *line;

	if (!pipe)
		return ERR;

	while ((line = fgets(buffer, sizeof(buffer), pipe))) {
		char *name = strchr(line, '\t');
		struct ref *ref;
		int namelen;
		bool tag = FALSE;
		bool tag_commit = FALSE;

		if (!name)
			continue;

		*name++ = 0;
		namelen = strlen(name) - 1;

		/* Commits referenced by tags has "^{}" appended. */
		if (name[namelen - 1] == '}') {
			while (namelen > 0 && name[namelen] != '^')
				namelen--;
			if (namelen > 0)
				tag_commit = TRUE;
		}
		name[namelen] = 0;

		if (!strncmp(name, "refs/tags/", STRING_SIZE("refs/tags/"))) {
			if (!tag_commit)
				continue;
			name += STRING_SIZE("refs/tags/");
			tag = TRUE;

		} else if (!strncmp(name, "refs/heads/", STRING_SIZE("refs/heads/"))) {
			name += STRING_SIZE("refs/heads/");

		} else if (!strcmp(name, "HEAD")) {
			continue;
		}

		refs = realloc(refs, sizeof(*refs) * (refs_size + 1));
		if (!refs)
			return ERR;

		ref = &refs[refs_size++];
		ref->tag = tag;
		ref->name = strdup(name);
		if (!ref->name)
			return ERR;

		string_copy(ref->id, line);
	}

	if (ferror(pipe))
		return ERR;

	pclose(pipe);

	if (refs_size == 0)
		die("Not a git repository");

	return OK;
}

/*
 * Main
 */

static void
quit(int sig)
{
	/* XXX: Restore tty modes and let the OS cleanup the rest! */
	if (cursed)
		endwin();
	exit(0);
}

static void
die(const char *err, ...)
{
	va_list args;

	endwin();

	va_start(args, err);
	fputs("tig: ", stderr);
	vfprintf(stderr, err, args);
	fputs("\n", stderr);
	va_end(args);

	exit(1);
}

int
main(int argc, char *argv[])
{
	struct view *view;
	enum request request;
	size_t i;

	signal(SIGINT, quit);

	if (!parse_options(argc, argv))
		return 0;

	if (load_refs() == ERR)
		die("Failed to load refs.");

	for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
		view->cmd_env = getenv(view->cmd_env);

	request = opt_request;

	init_display();

	while (view_driver(display[current_view], request)) {
		int key;
		int i;

		foreach_view (view, i)
			update_view(view);

		/* Refresh, accept single keystroke of input */
		key = wgetch(status_win);
		request = get_request(key);

		/* Some low-level request handling. This keeps access to
		 * status_win restricted. */
		switch (request) {
		case REQ_PROMPT:
			report(":");
			/* Temporarily switch to line-oriented and echoed
			 * input. */
			nocbreak();
			echo();

			if (wgetnstr(status_win, opt_cmd + 4, sizeof(opt_cmd) - 4) == OK) {
				memcpy(opt_cmd, "git ", 4);
				opt_request = REQ_VIEW_PAGER;
			} else {
				request = ERR;
			}

			noecho();
			cbreak();
			break;

		case REQ_SCREEN_RESIZE:
		{
			int height, width;

			getmaxyx(stdscr, height, width);

			/* Resize the status view and let the view driver take
			 * care of resizing the displayed views. */
			wresize(status_win, 1, width);
			mvwin(status_win, height - 1, 0);
			wrefresh(status_win);
			break;
		}
		default:
			break;
		}
	}

	quit(0);

	return 0;
}

/**
 * [[refspec]]
 * Revision specification
 * ----------------------
 * This section describes various ways to specify what revisions to display
 * or otherwise limit the view to. tig(1) does not itself parse the described
 * revision options so refer to the relevant git man pages for futher
 * information. Relevant man pages besides git-log(1) are git-diff(1) and
 * git-rev-list(1).
 *
 * You can tune the interaction with git by making use of the options
 * explained in this section. For example, by configuring the environment
 * variables described in the  <<view-commands, "View commands">> section.
 *
 * Limit by path name
 * ~~~~~~~~~~~~~~~~~~
 * If you are interested only in those revisions that made changes to a
 * specific file (or even several files) list the files like this:
 *
 *	$ tig log Makefile
 *
 * To avoid ambiguity with repository references such as tag name, be sure
 * to separate file names from other git options using "\--". So if you
 * have a file named 'master' it will clash with the reference named
 * 'master', and thus you will have to use:
 *
 *	$ tig log -- master
 *
 * NOTE: For the main view, avoiding ambiguity will in some cases require
 * you to specify two "\--" options. The first will make tig(1) stop
 * option processing and the latter will be passed to git log.
 *
 * Limit by date or number
 * ~~~~~~~~~~~~~~~~~~~~~~~
 * To speed up interaction with git, you can limit the amount of commits
 * to show both for the log and main view. Either limit by date using
 * e.g. `--since=1.month` or limit by the number of commits using `-n400`.
 *
 * If you are only interested in changed that happened between two dates
 * you can use:
 *
 *	$ tig -- --after=May.5th --before=2006-05-16.15:44
 *
 * NOTE: The dot (".") is used as a separator instead of a space to avoid
 * having to quote the option value. If you prefer use `--after="May 5th"`
 * instead of `--after="May 5th"`.
 *
 * Limiting by commit ranges
 * ~~~~~~~~~~~~~~~~~~~~~~~~~
 * Alternatively, commits can be limited to a specific range, such as
 * "all commits between 'tag-1.0' and 'tag-2.0'". For example:
 *
 *	$ tig log tag-1.0..tag-2.0
 *
 * This way of commit limiting makes it trivial to only browse the commits
 * which haven't been pushed to a remote branch. Assuming 'origin' is your
 * upstream remote branch, using:
 *
 *	$ tig log origin..HEAD
 *
 * will list what will be pushed to the remote branch. Optionally, the ending
 * 'HEAD' can be left out since it is implied.
 *
 * Limiting by reachability
 * ~~~~~~~~~~~~~~~~~~~~~~~~
 * Git interprets the range specifier "tag-1.0..tag-2.0" as
 * "all commits reachable from 'tag-2.0' but not from 'tag-1.0'".
 * Where reachability refers to what commits are ancestors (or part of the
 * history) of the branch or tagged revision in question.
 *
 * If you prefer to specify which commit to preview in this way use the
 * following:
 *
 *	$ tig log tag-2.0 ^tag-1.0
 *
 * You can think of '^' as a negation operator. Using this alternate syntax,
 * it is possible to further prune commits by specifying multiple branch
 * cut offs.
 *
 * Combining revisions specification
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 * Revisions options can to some degree be combined, which makes it possible
 * to say "show at most 20 commits from within the last month that changed
 * files under the Documentation/ directory."
 *
 *	$ tig -- --since=1.month -n20 -- Documentation/
 *
 * Examining all repository references
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 * In some cases, it can be useful to query changes across all references
 * in a repository. An example is to ask "did any line of development in
 * this repository change a particular file within the last week". This
 * can be accomplished using:
 *
 *	$ tig -- --all --since=1.week -- Makefile
 *
 * BUGS
 * ----
 * Known bugs and problems:
 *
 * - If the screen width is very small the main view can draw
 *   outside the current view causing bad wrapping. Same goes
 *   for title and status windows.
 *
 * TODO
 * ----
 * Features that should be explored.
 *
 * - Searching.
 *
 * - Locale support.
 *
 * COPYRIGHT
 * ---------
 * Copyright (c) Jonas Fonseca <fonseca@diku.dk>, 2006
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * SEE ALSO
 * --------
 * [verse]
 * link:http://www.kernel.org/pub/software/scm/git/docs/[git(7)],
 * link:http://www.kernel.org/pub/software/scm/cogito/docs/[cogito(7)]
 * gitk(1): git repository browser written using tcl/tk,
 * qgit(1): git repository browser written using c++/Qt,
 * gitview(1): git repository browser written using python/gtk.
 **/

Re: [ANNOUNCE] tig - text-mode interface for git

[Jakub Narebski]

Jonas Fonseca wrote:

> Hello,
> 
> I am pleased to announce tig, a simple git repository browser written
> using ncurses. Basically, it just acts as a front-end for git-log and
> git-show/git-diff. Additionally, you can also use it as a pager for git
> commands.

Thanks a lot.

Added to http://git.or.cz/gitwiki/InterfacesFrontendsAndTools
(under "Graphical Interfaces" section).

-- 
Jakub Narebski
Warsaw, Poland

Re: [ANNOUNCE] tig - text-mode interface for git

[Timo Hirvonen]

Jonas Fonseca <fonseca@diku.dk> wrote:

> Hello,
> 
> I am pleased to announce tig, a simple git repository browser written
> using ncurses. Basically, it just acts as a front-end for git-log and
> git-show/git-diff. Additionally, you can also use it as a pager for git
> commands.
> 
> Currently, it just provides a minimum support for looking through
> changes. I hope to slowly extend it to also be usable as a front-end for
> git-blame and for tree browsing. Also, it doesn't do any fancy revision
> graph rendering, but I want to at least give it a shot at some point. :)

Thanks.  This makes browsing repositories much easier.  It would be
great if the colors were customizable.

-- 
http://onion.dynserv.net/~timo/

Re: [ANNOUNCE] tig - text-mode interface for git

[Jonas Fonseca]

Timo Hirvonen <tihirvon@gmail.com> wrote Wed, May 17, 2006:
> Jonas Fonseca <fonseca@diku.dk> wrote:
> 
> > Hello,
> > 
> > I am pleased to announce tig, a simple git repository browser written
> > using ncurses. Basically, it just acts as a front-end for git-log and
> > git-show/git-diff. Additionally, you can also use it as a pager for git
> > commands.
> > 
> > Currently, it just provides a minimum support for looking through
> > changes. I hope to slowly extend it to also be usable as a front-end for
> > git-blame and for tree browsing. Also, it doesn't do any fancy revision
> > graph rendering, but I want to at least give it a shot at some point. :)
> 
> Thanks.  This makes browsing repositories much easier.  It would be
> great if the colors were customizable.

I am open to providing a better default color scheme, since my fondness
of green might be too dominating. For now you will have to edit the
colors defined under LINE_INFO, but sure. I think supporting something
similar to CG_COLORS will suffice.

-- 
Jonas Fonseca