[PATCH] mergetools: Simplify how we handle "vim" and "defaults"

[David Aguilar <davvid@gmail.com>]

Remove the exceptions for "vim" and "defaults" in the mergetool library
so that every filename in mergetools/ matches 1:1 with the name of a
valid built-in tool.

Make common functions available in $MERGE_TOOLS_DIR/include/.

Signed-off-by: David Aguilar <davvid@gmail.com>
---
This should make things ok on platforms where we don't have symlinks.

 Makefile                                     |  2 +-
 git-mergetool--lib.sh                        | 41 +++++++++++-----------------
 mergetools/gvimdiff                          |  1 +
 mergetools/gvimdiff2                         |  1 +
 mergetools/{defaults => include/defaults.sh} |  0
 mergetools/{vim => include/vim.sh}           |  0
 mergetools/vimdiff                           |  1 +
 mergetools/vimdiff2                          |  1 +
 8 files changed, 21 insertions(+), 26 deletions(-)
 create mode 100644 mergetools/gvimdiff
 create mode 100644 mergetools/gvimdiff2
 rename mergetools/{defaults => include/defaults.sh} (100%)
 rename mergetools/{vim => include/vim.sh} (100%)
 create mode 100644 mergetools/vimdiff
 create mode 100644 mergetools/vimdiff2

diff --git a/Makefile b/Makefile
index f69979e..3bc6eb5 100644
--- a/Makefile
+++ b/Makefile
@@ -2724,7 +2724,7 @@ install: all
 	$(INSTALL) $(install_bindir_programs) '$(DESTDIR_SQ)$(bindir_SQ)'
 	$(MAKE) -C templates DESTDIR='$(DESTDIR_SQ)' install
 	$(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(mergetools_instdir_SQ)'
-	$(INSTALL) -m 644 mergetools/* '$(DESTDIR_SQ)$(mergetools_instdir_SQ)'
+	cp -R mergetools/* '$(DESTDIR_SQ)$(mergetools_instdir_SQ)'
 ifndef NO_GETTEXT
 	$(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(localedir_SQ)'
 	(cd po/build/locale && $(TAR) cf - .) | \
diff --git a/git-mergetool--lib.sh b/git-mergetool--lib.sh
index aa38bd1..c866ed8 100644
--- a/git-mergetool--lib.sh
+++ b/git-mergetool--lib.sh
@@ -1,5 +1,7 @@
 #!/bin/sh
 # git-mergetool--lib is a library for common merge tool functions
+MERGE_TOOLS_DIR="$(git --exec-path)/mergetools"
+
 diff_mode() {
 	test "$TOOL_MODE" = diff
 }
@@ -44,25 +46,14 @@ valid_tool () {
 }
 
 setup_tool () {
-	case "$1" in
-	vim*|gvim*)
-		tool=vim
-		;;
-	*)
-		tool="$1"
-		;;
-	esac
-	mergetools="$(git --exec-path)/mergetools"
+	tool="$1"
 
-	# Load the default definitions
-	. "$mergetools/defaults"
-	if ! test -f "$mergetools/$tool"
+	if ! test -f "$MERGE_TOOLS_DIR/$tool"
 	then
 		return 1
 	fi
-
-	# Load the redefined functions
-	. "$mergetools/$tool"
+	. "$MERGE_TOOLS_DIR/include/defaults.sh"
+	. "$MERGE_TOOLS_DIR/$tool"
 
 	if merge_mode && ! can_merge
 	then
@@ -99,7 +90,7 @@ run_merge_tool () {
 	base_present="$2"
 	status=0
 
-	# Bring tool-specific functions into scope
+	# Bring tool specific functions into scope
 	setup_tool "$1"
 
 	if merge_mode
@@ -177,18 +168,17 @@ list_merge_tool_candidates () {
 show_tool_help () {
 	unavailable= available= LF='
 '
-
-	scriptlets="$(git --exec-path)"/mergetools
-	for i in "$scriptlets"/*
+	for i in "$MERGE_TOOLS_DIR"/*
 	do
-		. "$scriptlets"/defaults
-		. "$i"
-
-		tool="$(basename "$i")"
-		if test "$tool" = "defaults"
+		if test -d "$i"
 		then
 			continue
-		elif merge_mode && ! can_merge
+		fi
+
+		. "$MERGE_TOOLS_DIR"/include/defaults.sh
+		. "$i"
+
+		if merge_mode && ! can_merge
 		then
 			continue
 		elif diff_mode && ! can_diff
@@ -196,6 +186,7 @@ show_tool_help () {
 			continue
 		fi
 
+		tool=$(basename "$i")
 		merge_tool_path=$(translate_merge_tool_path "$tool")
 		if type "$merge_tool_path" >/dev/null 2>&1
 		then
diff --git a/mergetools/gvimdiff b/mergetools/gvimdiff
new file mode 100644
index 0000000..f5890b1
--- /dev/null
+++ b/mergetools/gvimdiff
@@ -0,0 +1 @@
+. "$MERGE_TOOLS_DIR/include/vim.sh"
diff --git a/mergetools/gvimdiff2 b/mergetools/gvimdiff2
new file mode 100644
index 0000000..f5890b1
--- /dev/null
+++ b/mergetools/gvimdiff2
@@ -0,0 +1 @@
+. "$MERGE_TOOLS_DIR/include/vim.sh"
diff --git a/mergetools/defaults b/mergetools/include/defaults.sh
similarity index 100%
rename from mergetools/defaults
rename to mergetools/include/defaults.sh
diff --git a/mergetools/vim b/mergetools/include/vim.sh
similarity index 100%
rename from mergetools/vim
rename to mergetools/include/vim.sh
diff --git a/mergetools/vimdiff b/mergetools/vimdiff
new file mode 100644
index 0000000..f5890b1
--- /dev/null
+++ b/mergetools/vimdiff
@@ -0,0 +1 @@
+. "$MERGE_TOOLS_DIR/include/vim.sh"
diff --git a/mergetools/vimdiff2 b/mergetools/vimdiff2
new file mode 100644
index 0000000..f5890b1
--- /dev/null
+++ b/mergetools/vimdiff2
@@ -0,0 +1 @@
+. "$MERGE_TOOLS_DIR/include/vim.sh"
-- 
1.8.0.6.ge6f188f.dirty