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git/mergetools/meld
Lin Sun dbd8c09bfe mergetool: allow auto-merge for meld to follow the vim-diff behavior
Make the mergetool used with "meld" backend behave similarly to "vimdiff" by
telling it to auto-merge non-conflicting parts and highlight the conflicting
parts when `mergetool.meld.useAutoMerge` is configured with `true`, or `auto`
for detecting the `--auto-merge` option automatically.

Helped-by: Đoàn Trần Công Danh <congdanhqx@gmail.com>
Helped-by: David Aguilar <davvid@gmail.com>
Signed-off-by: Lin Sun <lin.sun@zoom.us>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-09-16 17:11:20 -07:00

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Text

diff_cmd () {
"$merge_tool_path" "$LOCAL" "$REMOTE"
}
merge_cmd () {
check_meld_for_features
option_auto_merge=
if test "$meld_use_auto_merge_option" = true
then
option_auto_merge="--auto-merge"
fi
if test "$meld_has_output_option" = true
then
"$merge_tool_path" $option_auto_merge --output="$MERGED" \
"$LOCAL" "$BASE" "$REMOTE"
else
"$merge_tool_path" $option_auto_merge "$LOCAL" "$MERGED" "$REMOTE"
fi
}
# Get meld help message
init_meld_help_msg () {
if test -z "$meld_help_msg"
then
meld_path="$(git config mergetool.meld.path || echo meld)"
meld_help_msg=$("$meld_path" --help 2>&1)
fi
}
# Check the features and set flags
check_meld_for_features () {
# Check whether we should use 'meld --output <file>'
if test -z "$meld_has_output_option"
then
meld_has_output_option=$(git config --bool mergetool.meld.hasOutput)
case "$meld_has_output_option" in
true | false)
: use configured value
;;
*)
: empty or invalid configured value, detecting "--output" automatically
init_meld_help_msg
case "$meld_help_msg" in
*"--output="* | *'[OPTION...]'*)
# All version that has [OPTION...] supports --output
meld_has_output_option=true
;;
*)
meld_has_output_option=false
;;
esac
;;
esac
fi
# Check whether we should use 'meld --auto-merge ...'
if test -z "$meld_use_auto_merge_option"
then
meld_use_auto_merge_option=$(
git config --bool-or-str mergetool.meld.useAutoMerge
)
case "$meld_use_auto_merge_option" in
true | false)
: use well formatted boolean value
;;
auto)
# testing the "--auto-merge" option only if config is "auto"
init_meld_help_msg
case "$meld_help_msg" in
*"--auto-merge"* | *'[OPTION...]'*)
meld_use_auto_merge_option=true
;;
*)
meld_use_auto_merge_option=false
;;
esac
;;
"")
meld_use_auto_merge_option=false
;;
*)
die "unknown mergetool.meld.useAutoMerge: $meld_use_auto_merge_option"
;;
esac
fi
}