Git 2.9.3
[git/git.git] / git-difftool--helper.sh
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5c38ea31 1#!/bin/sh
afcbc8e7 2# git-difftool--helper is a GIT_EXTERNAL_DIFF-compatible diff tool launcher.
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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
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8TOOL_MODE=diff
9. git-mergetool--lib
10
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11# difftool.prompt controls the default prompt/no-prompt behavior
12# and is overridden with $GIT_DIFFTOOL*_PROMPT.
5c38ea31 13should_prompt () {
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14 prompt_merge=$(git config --bool mergetool.prompt || echo true)
15 prompt=$(git config --bool difftool.prompt || echo $prompt_merge)
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16 if test "$prompt" = true
17 then
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18 test -z "$GIT_DIFFTOOL_NO_PROMPT"
19 else
20 test -n "$GIT_DIFFTOOL_PROMPT"
21 fi
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22}
23
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24# Indicates that --extcmd=... was specified
25use_ext_cmd () {
26 test -n "$GIT_DIFFTOOL_EXTCMD"
27}
28
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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"
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38
39 # $LOCAL and $REMOTE are temporary files so prompt
40 # the user with the real $MERGED name before launching $merge_tool.
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41 if should_prompt
42 then
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43 printf "\nViewing (%s/%s): '%s'\n" "$GIT_DIFF_PATH_COUNTER" \
44 "$GIT_DIFF_PATH_TOTAL" "$MERGED"
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45 if use_ext_cmd
46 then
cce076e3 47 printf "Launch '%s' [Y/n]? " \
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48 "$GIT_DIFFTOOL_EXTCMD"
49 else
cce076e3 50 printf "Launch '%s' [Y/n]? " "$merge_tool"
ba959de1 51 fi
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52 read ans || return
53 if test "$ans" = n
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54 then
55 return
1c6f5b52 56 fi
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57 fi
58
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59 if use_ext_cmd
60 then
4a689afb 61 export BASE
9f3d54d1 62 eval $GIT_DIFFTOOL_EXTCMD '"$LOCAL"' '"$REMOTE"'
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63 else
64 run_merge_tool "$merge_tool"
65 fi
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66}
67
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68if ! use_ext_cmd
69then
70 if test -n "$GIT_DIFF_TOOL"
71 then
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72 merge_tool="$GIT_DIFF_TOOL"
73 else
74 merge_tool="$(get_merge_tool)" || exit
75 fi
47d65924 76fi
5c38ea31 77
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78if test -n "$GIT_DIFFTOOL_DIRDIFF"
79then
80 LOCAL="$1"
81 REMOTE="$2"
82 run_merge_tool "$merge_tool" false
83else
84 # Launch the merge tool on each path provided by 'git diff'
85 while test $# -gt 6
86 do
87 launch_merge_tool "$1" "$2" "$5"
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88 status=$?
89 if test "$status" != 0 &&
90 test "$GIT_DIFFTOOL_TRUST_EXIT_CODE" = true
91 then
92 exit $status
93 fi
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94 shift 7
95 done
96fi
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97
98exit 0