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git/mergetools/meld
Fernando Ramos 980145f747 mergetools: add description to all diff/merge tools
The output of `git mergetool --tool-help` and `git difftool --tool-help`
only showed the `alias` of each available merge/diff tool.

It is not always obvious what tool these `aliases` end up using (ex:
`opendiff` runs `FileMerge` and `bc` runs `Beyond Compare`).

This commit adds a short description to each of them to help the user
identify the `alias` they want.

Signed-off-by: Fernando Ramos <greenfoo@u92.eu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-04-03 15:10:04 -07:00

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diff_cmd () {
"$merge_tool_path" "$LOCAL" "$REMOTE"
}
diff_cmd_help () {
echo "Use Meld (requires a graphical session)"
}
merge_cmd () {
check_meld_for_features
option_auto_merge=
if test "$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
}
merge_cmd_help () {
echo "Use Meld (requires a graphical session) with optional \`auto merge\` (see \`git help mergetool\`'s \`CONFIGURATION\` section)"
}
# 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
}