Git 1.8.5
[git/git.git] / git-difftool--helper.sh
CommitLineData
5c38ea31 1#!/bin/sh
afcbc8e7 2# git-difftool--helper is a GIT_EXTERNAL_DIFF-compatible diff tool launcher.
5c38ea31
DA
3# This script is typically launched by using the 'git difftool'
4# convenience command.
5#
c8a5672e 6# Copyright (c) 2009, 2010 David Aguilar
5c38ea31 7
21d0ba7e
DA
8TOOL_MODE=diff
9. git-mergetool--lib
10
a904392e
DA
11# difftool.prompt controls the default prompt/no-prompt behavior
12# and is overridden with $GIT_DIFFTOOL*_PROMPT.
5c38ea31 13should_prompt () {
4cacc621
SS
14 prompt_merge=$(git config --bool mergetool.prompt || echo true)
15 prompt=$(git config --bool difftool.prompt || echo $prompt_merge)
fdd7aa17
DA
16 if test "$prompt" = true
17 then
a904392e
DA
18 test -z "$GIT_DIFFTOOL_NO_PROMPT"
19 else
20 test -n "$GIT_DIFFTOOL_PROMPT"
21 fi
5c38ea31
DA
22}
23
1c6f5b52
DA
24# Indicates that --extcmd=... was specified
25use_ext_cmd () {
26 test -n "$GIT_DIFFTOOL_EXTCMD"
27}
28
5c38ea31
DA
29launch_merge_tool () {
30 # Merged is the filename as it appears in the work tree
31 # Local is the contents of a/filename
32 # Remote is the contents of b/filename
33 # Custom merge tool commands might use $BASE so we provide it
34 MERGED="$1"
35 LOCAL="$2"
36 REMOTE="$3"
37 BASE="$1"
5c38ea31
DA
38
39 # $LOCAL and $REMOTE are temporary files so prompt
40 # the user with the real $MERGED name before launching $merge_tool.
fdd7aa17
DA
41 if should_prompt
42 then
2a9ccfff 43 printf "\nViewing: '%s'\n" "$MERGED"
fdd7aa17
DA
44 if use_ext_cmd
45 then
ba959de1 46 printf "Launch '%s' [Y/n]: " \
1c6f5b52
DA
47 "$GIT_DIFFTOOL_EXTCMD"
48 else
ba959de1
SC
49 printf "Launch '%s' [Y/n]: " "$merge_tool"
50 fi
51 if read ans && test "$ans" = n
52 then
53 return
1c6f5b52 54 fi
5c38ea31
DA
55 fi
56
fdd7aa17
DA
57 if use_ext_cmd
58 then
4a689afb 59 export BASE
9f3d54d1 60 eval $GIT_DIFFTOOL_EXTCMD '"$LOCAL"' '"$REMOTE"'
1c6f5b52
DA
61 else
62 run_merge_tool "$merge_tool"
63 fi
5c38ea31
DA
64}
65
fdd7aa17
DA
66if ! use_ext_cmd
67then
68 if test -n "$GIT_DIFF_TOOL"
69 then
1c6f5b52
DA
70 merge_tool="$GIT_DIFF_TOOL"
71 else
72 merge_tool="$(get_merge_tool)" || exit
73 fi
47d65924 74fi
5c38ea31 75
7e0abcec
TH
76if test -n "$GIT_DIFFTOOL_DIRDIFF"
77then
78 LOCAL="$1"
79 REMOTE="$2"
80 run_merge_tool "$merge_tool" false
81else
82 # Launch the merge tool on each path provided by 'git diff'
83 while test $# -gt 6
84 do
85 launch_merge_tool "$1" "$2" "$5"
86 shift 7
87 done
88fi