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Teach git mergetool to use custom commands defined at config time

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Currently git mergetool is restricted to a set of commands defined
in the script. You can subvert the mergetool.<tool>.path to force
git mergetool to use a different command, but if you have a command
whose invocation syntax does not match one of the current tools then
you would have to write a wrapper script for it.

This patch adds two git config variable patterns which allow a more
flexible choice of merge tool.

If you run git mergetool with -t/--tool or the merge.tool config
variable set to an unrecognized tool then git mergetool will query the
mergetool.<tool>.cmd config variable. If this variable exists, then git
mergetool will treat the specified tool as a custom command and will use
a shell eval to run the command with the documented shell variables set.

mergetool.<tool>.trustExitCode can be used to indicate that the exit
code of the custom command can be used to determine the success of the
merge.

Signed-off-by: Charles Bailey <charles@hashpling.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Charles Bailey 2008-02-21 23:31:12 +00:00 committed by Junio C Hamano
parent b3ea27e4de
commit 964473a042
2 changed files with 49 additions and 4 deletions
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25
Documentation/config.txt
View File

@ -749,8 +749,10 @@ merge.summary::
merge.tool::
Controls which merge resolution program is used by
linkgit:git-mergetool[1]. Valid values are: "kdiff3", "tkdiff",
"meld", "xxdiff", "emerge", "vimdiff", "gvimdiff", and "opendiff".
linkgit:git-mergetool[1]. Valid built-in values are: "kdiff3",
"tkdiff", "meld", "xxdiff", "emerge", "vimdiff", "gvimdiff", and
"opendiff". Any other value is treated is custom merge tool
and there must be a corresponing mergetool.<tool>.cmd option.
merge.verbosity::
Controls the amount of output shown by the recursive merge
@ -777,6 +779,25 @@ mergetool.<tool>.path::
Override the path for the given tool. This is useful in case
your tool is not in the PATH.
mergetool.<tool>.cmd::
Specify the command to invoke the specified merge tool. The
specified command is evaluated in shell with the following
variables available: 'BASE' is the name of a temporary file
containing the common base of the files to be merged, if available;
'LOCAL' is the name of a temporary file containing the contents of
the file on the current branch; 'REMOTE' is the name of a temporary
file containing the contents of the file from the branch being
merged; 'MERGED' contains the name of the file to which the merge
tool should write the results of a successful merge.
mergetool.<tool>.trustExitCode::
For a custom merge command, specify whether the exit code of
the merge command can be used to determine whether the merge was
successful. If this is not set to true then the merge target file
timestamp is checked and the merge assumed to have been successful
if the file has been updated, otherwise the user is prompted to
indicate the success of the merge.
mergetool.keepBackup::
After performing a merge, the original file with conflict markers
can be saved as a file with a `.orig` extension. If this variable

28
git-mergetool.sh
View File

@ -251,6 +251,18 @@ merge_file () {
fi
status=$?
;;
*)
if test -n "$merge_tool_cmd"; then
if test "$merge_tool_trust_exit_code" = "false"; then
touch "$BACKUP"
( eval $merge_tool_cmd )
check_unchanged
else
( eval $merge_tool_cmd )
status=$?
fi
fi
;;
esac
if test "$status" -ne 0; then
echo "merge of $MERGED failed" 1>&2
@ -296,12 +308,20 @@ do
shift
done
valid_custom_tool()
{
merge_tool_cmd="$(git config mergetool.$1.cmd)"
test -n "$merge_tool_cmd"
}
valid_tool() {
case "$1" in
kdiff3 | tkdiff | xxdiff | meld | opendiff | emerge | vimdiff | gvimdiff | ecmerge)
;; # happy
*)
return 1
if ! valid_custom_tool "$1"; then
return 1
fi
;;
esac
}
@ -369,10 +389,14 @@ else
merge_keep_backup="$(git config --bool merge.keepBackup || echo true)"
if ! type "$merge_tool_path" > /dev/null 2>&1; then
if test -z "$merge_tool_cmd" && ! type "$merge_tool_path" > /dev/null 2>&1; then
echo "The merge tool $merge_tool is not available as '$merge_tool_path'"
exit 1
fi
if ! test -z "$merge_tool_cmd"; then
merge_tool_trust_exit_code="$(git config --bool mergetool.$merge_tool.trustExitCode || echo false)"
fi
fi