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45a4f5d9f9
At the moment difftool's "trust exit code" logic always suppresses the exit status of the diff utility we invoke. This is useful because we don't want to exit just because diff returned "1" because the files differ, but it's confusing if the shell returns an error because the selected diff utility is not found. POSIX specifies 127 as the exit status for "command not found", 126 for "command found but is not executable" and values greater than 128 if the command terminated because it received a signal [1] and at least bash and dash follow this specification, while diff utilities generally use "1" for the exit status we want to ignore. Handle any value of 126 or greater as a special value indicating that some form of fatal error occurred. [1] http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_08_02 Signed-off-by: John Keeping <john@keeping.me.uk> Signed-off-by: Junio C Hamano <gitster@pobox.com>
105 lines
2.2 KiB
Bash
Executable file
105 lines
2.2 KiB
Bash
Executable file
#!/bin/sh
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# git-difftool--helper is a GIT_EXTERNAL_DIFF-compatible diff tool launcher.
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# This script is typically launched by using the 'git difftool'
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# convenience command.
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#
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# Copyright (c) 2009, 2010 David Aguilar
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TOOL_MODE=diff
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. git-mergetool--lib
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# difftool.prompt controls the default prompt/no-prompt behavior
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# and is overridden with $GIT_DIFFTOOL*_PROMPT.
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should_prompt () {
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prompt_merge=$(git config --bool mergetool.prompt || echo true)
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prompt=$(git config --bool difftool.prompt || echo $prompt_merge)
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if test "$prompt" = true
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then
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test -z "$GIT_DIFFTOOL_NO_PROMPT"
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else
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test -n "$GIT_DIFFTOOL_PROMPT"
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fi
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}
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# Indicates that --extcmd=... was specified
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use_ext_cmd () {
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test -n "$GIT_DIFFTOOL_EXTCMD"
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}
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launch_merge_tool () {
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# Merged is the filename as it appears in the work tree
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# Local is the contents of a/filename
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# Remote is the contents of b/filename
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# Custom merge tool commands might use $BASE so we provide it
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MERGED="$1"
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LOCAL="$2"
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REMOTE="$3"
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BASE="$1"
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# $LOCAL and $REMOTE are temporary files so prompt
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# the user with the real $MERGED name before launching $merge_tool.
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if should_prompt
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then
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printf "\nViewing (%s/%s): '%s'\n" "$GIT_DIFF_PATH_COUNTER" \
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"$GIT_DIFF_PATH_TOTAL" "$MERGED"
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if use_ext_cmd
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then
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printf "Launch '%s' [Y/n]? " \
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"$GIT_DIFFTOOL_EXTCMD"
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else
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printf "Launch '%s' [Y/n]? " "$merge_tool"
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fi
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read ans || return
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if test "$ans" = n
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then
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return
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fi
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fi
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if use_ext_cmd
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then
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export BASE
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eval $GIT_DIFFTOOL_EXTCMD '"$LOCAL"' '"$REMOTE"'
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else
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run_merge_tool "$merge_tool"
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fi
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}
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if ! use_ext_cmd
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then
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if test -n "$GIT_DIFF_TOOL"
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then
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merge_tool="$GIT_DIFF_TOOL"
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else
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merge_tool="$(get_merge_tool)" || exit
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fi
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fi
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if test -n "$GIT_DIFFTOOL_DIRDIFF"
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then
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LOCAL="$1"
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REMOTE="$2"
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run_merge_tool "$merge_tool" false
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else
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# Launch the merge tool on each path provided by 'git diff'
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while test $# -gt 6
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do
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launch_merge_tool "$1" "$2" "$5"
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status=$?
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if test $status -ge 126
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then
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# Command not found (127), not executable (126) or
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# exited via a signal (>= 128).
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exit $status
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fi
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if test "$status" != 0 &&
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test "$GIT_DIFFTOOL_TRUST_EXIT_CODE" = true
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then
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exit $status
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fi
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shift 7
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done
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fi
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exit 0
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