Andrew's git - gitweb.git/blob - git-difftool--helper.sh

   1#!/bin/sh
   2# git-difftool--helper is a GIT_EXTERNAL_DIFF-compatible diff tool launcher.
   3# This script is typically launched by using the 'git difftool'
   4# convenience command.
   5#
   6# Copyright (c) 2009, 2010 David Aguilar
   7
   8TOOL_MODE=diff
   9. git-mergetool--lib
  10
  11# difftool.prompt controls the default prompt/no-prompt behavior
  12# and is overridden with $GIT_DIFFTOOL*_PROMPT.
  13should_prompt () {
  14        prompt_merge=$(git config --bool mergetool.prompt || echo true)
  15        prompt=$(git config --bool difftool.prompt || echo $prompt_merge)
  16        if test "$prompt" = true
  17        then
  18                test -z "$GIT_DIFFTOOL_NO_PROMPT"
  19        else
  20                test -n "$GIT_DIFFTOOL_PROMPT"
  21        fi
  22}
  23
  24# Indicates that --extcmd=... was specified
  25use_ext_cmd () {
  26        test -n "$GIT_DIFFTOOL_EXTCMD"
  27}
  28
  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"
  38
  39        # $LOCAL and $REMOTE are temporary files so prompt
  40        # the user with the real $MERGED name before launching $merge_tool.
  41        if should_prompt
  42        then
  43                printf "\nViewing: '$MERGED'\n"
  44                if use_ext_cmd
  45                then
  46                        printf "Launch '%s' [Y/n]: " \
  47                                "$GIT_DIFFTOOL_EXTCMD"
  48                else
  49                        printf "Launch '%s' [Y/n]: " "$merge_tool"
  50                fi
  51                if read ans && test "$ans" = n
  52                then
  53                        return
  54                fi
  55        fi
  56
  57        if use_ext_cmd
  58        then
  59                export BASE
  60                eval $GIT_DIFFTOOL_EXTCMD '"$LOCAL"' '"$REMOTE"'
  61        else
  62                run_merge_tool "$merge_tool"
  63        fi
  64}
  65
  66if ! use_ext_cmd
  67then
  68        if test -n "$GIT_DIFF_TOOL"
  69        then
  70                merge_tool="$GIT_DIFF_TOOL"
  71        else
  72                merge_tool="$(get_merge_tool)" || exit
  73        fi
  74fi
  75
  76if test -n "$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