[PATCH v4 2/3] Show items of interactive git-clean in columns

[Jiang Xin <worldhello.net@gmail.com>]

Signed-off-by: Jiang Xin <worldhello.net@gmail.com>
---
 builtin/clean.c | 63 +++++++++++++++++++++++++++++++++++++++++----------------
 1 file changed, 46 insertions(+), 17 deletions(-)

diff --git a/builtin/clean.c b/builtin/clean.c
index 407744e5..ac48e 100644
--- a/builtin/clean.c
+++ b/builtin/clean.c
@@ -13,9 +13,11 @@
 #include "refs.h"
 #include "string-list.h"
 #include "quote.h"
+#include "column.h"
 
 static int force = -1; /* unset */
 static int interactive;
+static unsigned int colopts;
 
 static const char *const builtin_clean_usage[] = {
 	N_("git clean [-d] [-f] [-i] [-n] [-q] [-e <pattern>] [-x | -X] [--] <paths>..."),
@@ -30,8 +32,12 @@ static const char *msg_warn_remove_failed = N_("failed to remove %s");
 
 static int git_clean_config(const char *var, const char *value, void *cb)
 {
-	if (!strcmp(var, "clean.requireforce"))
+	if (!prefixcmp(var, "column."))
+		return git_column_config(var, value, "clean", &colopts);
+	if (!strcmp(var, "clean.requireforce")) {
 		force = !git_config_bool(var, value);
+		return 0;
+	}
 	return git_default_config(var, value, cb);
 }
 
@@ -143,6 +149,34 @@ static int remove_dirs(struct strbuf *path, const char *prefix, int force_flag,
 	return ret;
 }
 
+void pretty_print_dels(struct string_list *dels, const char *prefix)
+{
+	struct string_list list = STRING_LIST_INIT_DUP;
+	struct string_list_item *item;
+	struct strbuf buf = STRBUF_INIT;
+	const char *qname;
+	struct column_options copts;
+
+	for_each_string_list_item(item, dels) {
+		qname = quote_path_relative(item->string, -1, &buf, prefix);
+		string_list_append(&list, qname);
+	}
+
+	/*
+	 * always enable column display, we only consult column.*
+	 * about layout strategy and stuff
+	 */
+	colopts = (colopts & ~COL_ENABLE_MASK) | COL_ENABLED;
+	memset(&copts, 0, sizeof(copts));
+	copts.indent = "  ";
+	copts.padding = 2;
+	print_columns(&list, colopts, &copts);
+
+	putchar('\n');
+	strbuf_release(&buf);
+	string_list_clear(&list, 0);
+}
+
 void interactive_clean_edit(struct string_list *dels, const char *prefix)
 {
 	struct dir_struct dir;
@@ -151,7 +185,6 @@ void interactive_clean_edit(struct string_list *dels, const char *prefix)
 	struct strbuf **ignore_list;
 	struct string_list_item *item;
 	struct exclude_list *el;
-	const char *qname;
 	int changed = -1, i;
 
 	while (1) {
@@ -170,12 +203,8 @@ void interactive_clean_edit(struct string_list *dels, const char *prefix)
 			putchar('\n');
 			putchar('\n');
 
-			/* Display dels in "Would remove ..." format */
-			for_each_string_list_item(item, dels) {
-				qname = quote_path_relative(item->string, -1, &buf, prefix);
-				printf(_(msg_would_remove), qname);
-			}
-			putchar('\n');
+			/* Display dels in columns */
+			pretty_print_dels(dels, prefix);
 		}
 
 		printf(_("Input ignore patterns> "));
@@ -230,20 +259,21 @@ void interactive_clean_edit(struct string_list *dels, const char *prefix)
 void interactive_clean(struct string_list *dels, const char *prefix)
 {
 	struct strbuf confirm = STRBUF_INIT;
-	struct strbuf buf = STRBUF_INIT;
-	struct string_list_item *item;
-	const char *qname;
 	int count = 0;
 
 	/* dels list may become empty after return back from edit mode */
 	while (dels->nr) {
-		/* Display dels in "Would remove ..." format */
-		for_each_string_list_item(item, dels) {
-			qname = quote_path_relative(item->string, -1, &buf, prefix);
-			printf(_(msg_would_remove), qname);
-		}
+		printf_ln(_(
+			    "WARNING: The following items will be removed permanently. Press \"y\"\n"
+			    "WARNING: to start cleaning, and press \"n\" to abort the cleaning.\n"
+			    "WARNING: You can also enter the \"edit\" mode, and select items\n"
+			    "WARNING: to be excluded from the cleaning."
+			   ));
 		putchar('\n');
 
+		/* Display dels in columns */
+		pretty_print_dels(dels, prefix);
+
 		/* Confirmation dialog */
 		printf(count > 0 ? _("Remove (Yes/no/edit) ? ") : _("Remove (yes/no/Edit) ? "));
 		strbuf_getline(&confirm, stdin, '\n');
@@ -271,7 +301,6 @@ void interactive_clean(struct string_list *dels, const char *prefix)
 		count++;
 	}
 
-	strbuf_release(&buf);
 	strbuf_release(&confirm);
 }
 
-- 
1.8.3.rc0.364.gbb5463f