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![Junio C Hamano](/assets/img/avatar_default.png)
The actual external command to run for mergetool backend can be specified with difftool/mergetool.$name.cmd configuration variables, but this mechanism was ignored for the backends we natively support. * da/mergetool-custom: mergetool--lib: Allow custom commands to override built-ins
253 lines
4.9 KiB
Bash
253 lines
4.9 KiB
Bash
#!/bin/sh
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# git-mergetool--lib is a library for common merge tool functions
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diff_mode() {
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test "$TOOL_MODE" = diff
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}
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merge_mode() {
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test "$TOOL_MODE" = merge
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}
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translate_merge_tool_path () {
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echo "$1"
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}
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check_unchanged () {
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if test "$MERGED" -nt "$BACKUP"
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then
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status=0
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else
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while true
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do
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echo "$MERGED seems unchanged."
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printf "Was the merge successful? [y/n] "
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read answer || return 1
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case "$answer" in
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y*|Y*) status=0; break ;;
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n*|N*) status=1; break ;;
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esac
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done
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fi
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}
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valid_tool_config () {
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if test -n "$(get_merge_tool_cmd "$1")"
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then
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return 0
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else
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return 1
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fi
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}
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valid_tool () {
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setup_tool "$1" || valid_tool_config "$1"
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}
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setup_tool () {
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case "$1" in
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vim*|gvim*)
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tool=vim
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;;
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*)
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tool="$1"
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;;
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esac
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mergetools="$(git --exec-path)/mergetools"
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# Load the default definitions
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. "$mergetools/defaults"
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if ! test -f "$mergetools/$tool"
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then
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return 1
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fi
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# Load the redefined functions
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. "$mergetools/$tool"
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if merge_mode && ! can_merge
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then
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echo "error: '$tool' can not be used to resolve merges" >&2
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exit 1
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elif diff_mode && ! can_diff
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then
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echo "error: '$tool' can only be used to resolve merges" >&2
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exit 1
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fi
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return 0
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}
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get_merge_tool_cmd () {
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# Prints the custom command for a merge tool
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merge_tool="$1"
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if diff_mode
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then
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echo "$(git config difftool.$merge_tool.cmd ||
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git config mergetool.$merge_tool.cmd)"
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else
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echo "$(git config mergetool.$merge_tool.cmd)"
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fi
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}
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# Entry point for running tools
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run_merge_tool () {
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# If GIT_PREFIX is empty then we cannot use it in tools
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# that expect to be able to chdir() to its value.
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GIT_PREFIX=${GIT_PREFIX:-.}
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export GIT_PREFIX
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merge_tool_path="$(get_merge_tool_path "$1")" || exit
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base_present="$2"
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status=0
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# Bring tool-specific functions into scope
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setup_tool "$1"
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if merge_mode
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then
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run_merge_cmd "$1"
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else
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run_diff_cmd "$1"
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fi
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return $status
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}
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# Run a either a configured or built-in diff tool
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run_diff_cmd () {
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merge_tool_cmd="$(get_merge_tool_cmd "$1")"
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if test -n "$merge_tool_cmd"
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then
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( eval $merge_tool_cmd )
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status=$?
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return $status
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else
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diff_cmd "$1"
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fi
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}
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# Run a either a configured or built-in merge tool
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run_merge_cmd () {
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merge_tool_cmd="$(get_merge_tool_cmd "$1")"
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if test -n "$merge_tool_cmd"
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then
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trust_exit_code="$(git config --bool \
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mergetool."$1".trustExitCode || echo false)"
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if test "$trust_exit_code" = "false"
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then
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touch "$BACKUP"
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( eval $merge_tool_cmd )
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status=$?
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check_unchanged
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else
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( eval $merge_tool_cmd )
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status=$?
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fi
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return $status
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else
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merge_cmd "$1"
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fi
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}
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list_merge_tool_candidates () {
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if merge_mode
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then
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tools="tortoisemerge"
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else
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tools="kompare"
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fi
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if test -n "$DISPLAY"
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then
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if test -n "$GNOME_DESKTOP_SESSION_ID"
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then
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tools="meld opendiff kdiff3 tkdiff xxdiff $tools"
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else
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tools="opendiff kdiff3 tkdiff xxdiff meld $tools"
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fi
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tools="$tools gvimdiff diffuse ecmerge p4merge araxis bc3 codecompare"
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fi
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case "${VISUAL:-$EDITOR}" in
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*vim*)
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tools="$tools vimdiff emerge"
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;;
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*)
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tools="$tools emerge vimdiff"
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;;
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esac
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}
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guess_merge_tool () {
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list_merge_tool_candidates
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echo >&2 "merge tool candidates: $tools"
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# Loop over each candidate and stop when a valid merge tool is found.
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for i in $tools
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do
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merge_tool_path="$(translate_merge_tool_path "$i")"
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if type "$merge_tool_path" >/dev/null 2>&1
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then
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echo "$i"
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return 0
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fi
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done
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echo >&2 "No known merge resolution program available."
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return 1
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}
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get_configured_merge_tool () {
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# Diff mode first tries diff.tool and falls back to merge.tool.
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# Merge mode only checks merge.tool
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if diff_mode
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then
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merge_tool=$(git config diff.tool || git config merge.tool)
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else
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merge_tool=$(git config merge.tool)
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fi
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if test -n "$merge_tool" && ! valid_tool "$merge_tool"
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then
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echo >&2 "git config option $TOOL_MODE.tool set to unknown tool: $merge_tool"
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echo >&2 "Resetting to default..."
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return 1
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fi
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echo "$merge_tool"
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}
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get_merge_tool_path () {
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# A merge tool has been set, so verify that it's valid.
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merge_tool="$1"
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if ! valid_tool "$merge_tool"
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then
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echo >&2 "Unknown merge tool $merge_tool"
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exit 1
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fi
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if diff_mode
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then
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merge_tool_path=$(git config difftool."$merge_tool".path ||
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git config mergetool."$merge_tool".path)
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else
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merge_tool_path=$(git config mergetool."$merge_tool".path)
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fi
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if test -z "$merge_tool_path"
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then
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merge_tool_path="$(translate_merge_tool_path "$merge_tool")"
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fi
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if test -z "$(get_merge_tool_cmd "$merge_tool")" &&
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! type "$merge_tool_path" >/dev/null 2>&1
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then
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echo >&2 "The $TOOL_MODE tool $merge_tool is not available as"\
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"'$merge_tool_path'"
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exit 1
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fi
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echo "$merge_tool_path"
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}
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get_merge_tool () {
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# Check if a merge tool has been configured
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merge_tool="$(get_configured_merge_tool)"
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# Try to guess an appropriate merge tool if no tool has been set.
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if test -z "$merge_tool"
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then
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merge_tool="$(guess_merge_tool)" || exit
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fi
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echo "$merge_tool"
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}
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