diff options
Diffstat (limited to 'git-mergetool--lib.sh')
| -rw-r--r-- | git-mergetool--lib.sh | 269 |
1 files changed, 198 insertions, 71 deletions
diff --git a/git-mergetool--lib.sh b/git-mergetool--lib.sh index f013a03..6a72106 100644 --- a/git-mergetool--lib.sh +++ b/git-mergetool--lib.sh @@ -1,5 +1,83 @@ #!/bin/sh # git-mergetool--lib is a library for common merge tool functions + +: ${MERGE_TOOLS_DIR=$(git --exec-path)/mergetools} + +mode_ok () { + if diff_mode + then + can_diff + elif merge_mode + then + can_merge + else + false + fi +} + +is_available () { + merge_tool_path=$(translate_merge_tool_path "$1") && + type "$merge_tool_path" >/dev/null 2>&1 +} + +list_config_tools () { + section=$1 + line_prefix=${2:-} + + git config --get-regexp $section'\..*\.cmd' | + while read -r key value + do + toolname=${key#$section.} + toolname=${toolname%.cmd} + + printf "%s%s\n" "$line_prefix" "$toolname" + done +} + +show_tool_names () { + condition=${1:-true} per_line_prefix=${2:-} preamble=${3:-} + not_found_msg=${4:-} + extra_content=${5:-} + + shown_any= + ( cd "$MERGE_TOOLS_DIR" && ls ) | { + while read toolname + do + if setup_tool "$toolname" 2>/dev/null && + (eval "$condition" "$toolname") + then + if test -n "$preamble" + then + printf "%s\n" "$preamble" + preamble= + fi + shown_any=yes + printf "%s%s\n" "$per_line_prefix" "$toolname" + fi + done + + if test -n "$extra_content" + then + if test -n "$preamble" + then + # Note: no '\n' here since we don't want a + # blank line if there is no initial content. + printf "%s" "$preamble" + preamble= + fi + shown_any=yes + printf "\n%s\n" "$extra_content" + fi + + if test -n "$preamble" && test -n "$not_found_msg" + then + printf "%s\n" "$not_found_msg" + fi + + test -n "$shown_any" + } +} + diff_mode() { test "$TOOL_MODE" = diff } @@ -30,61 +108,97 @@ check_unchanged () { fi } -valid_tool_config () { - if test -n "$(get_merge_tool_cmd "$1")" - then - return 0 - else - return 1 - fi +valid_tool () { + setup_tool "$1" && return 0 + cmd=$(get_merge_tool_cmd "$1") + test -n "$cmd" } -valid_tool () { - setup_tool "$1" || valid_tool_config "$1" +setup_user_tool () { + merge_tool_cmd=$(get_merge_tool_cmd "$tool") + test -n "$merge_tool_cmd" || return 1 + + diff_cmd () { + ( eval $merge_tool_cmd ) + status=$? + return $status + } + + merge_cmd () { + trust_exit_code=$(git config --bool \ + "mergetool.$1.trustExitCode" || echo false) + if test "$trust_exit_code" = "false" + then + touch "$BACKUP" + ( eval $merge_tool_cmd ) + status=$? + check_unchanged + else + ( eval $merge_tool_cmd ) + status=$? + fi + return $status + } } setup_tool () { - case "$1" in - vim*|gvim*) - tool=vim - ;; - *) - tool="$1" - ;; - esac - mergetools="$(git --exec-path)/mergetools" + tool="$1" + + # Fallback definitions, to be overriden by tools. + can_merge () { + return 0 + } + + can_diff () { + return 0 + } + + diff_cmd () { + status=1 + return $status + } + + merge_cmd () { + status=1 + return $status + } + + translate_merge_tool_path () { + echo "$1" + } - # Load the default definitions - . "$mergetools/defaults" - if ! test -f "$mergetools/$tool" + if ! test -f "$MERGE_TOOLS_DIR/$tool" then - return 1 + setup_user_tool + return $? fi # Load the redefined functions - . "$mergetools/$tool" + . "$MERGE_TOOLS_DIR/$tool" + # Now let the user override the default command for the tool. If + # they have not done so then this will return 1 which we ignore. + setup_user_tool if merge_mode && ! can_merge then echo "error: '$tool' can not be used to resolve merges" >&2 - exit 1 + return 1 elif diff_mode && ! can_diff then echo "error: '$tool' can only be used to resolve merges" >&2 - exit 1 + return 1 fi return 0 } get_merge_tool_cmd () { - # Prints the custom command for a merge tool merge_tool="$1" if diff_mode then - echo "$(git config difftool.$merge_tool.cmd || - git config mergetool.$merge_tool.cmd)" + git config "difftool.$merge_tool.cmd" || + git config "mergetool.$merge_tool.cmd" else - echo "$(git config mergetool.$merge_tool.cmd)" + git config "mergetool.$merge_tool.cmd" fi } @@ -95,12 +209,12 @@ run_merge_tool () { GIT_PREFIX=${GIT_PREFIX:-.} export GIT_PREFIX - merge_tool_path="$(get_merge_tool_path "$1")" || exit + merge_tool_path=$(get_merge_tool_path "$1") || exit base_present="$2" status=0 # Bring tool-specific functions into scope - setup_tool "$1" + setup_tool "$1" || return 1 if merge_mode then @@ -113,38 +227,12 @@ run_merge_tool () { # Run a either a configured or built-in diff tool run_diff_cmd () { - merge_tool_cmd="$(get_merge_tool_cmd "$1")" - if test -n "$merge_tool_cmd" - then - ( eval $merge_tool_cmd ) - status=$? - return $status - else - diff_cmd "$1" - fi + diff_cmd "$1" } # Run a either a configured or built-in merge tool run_merge_cmd () { - merge_tool_cmd="$(get_merge_tool_cmd "$1")" - if test -n "$merge_tool_cmd" - then - trust_exit_code="$(git config --bool \ - mergetool."$1".trustExitCode || echo false)" - if test "$trust_exit_code" = "false" - then - touch "$BACKUP" - ( eval $merge_tool_cmd ) - status=$? - check_unchanged - else - ( eval $merge_tool_cmd ) - status=$? - fi - return $status - else - merge_cmd "$1" - fi + merge_cmd "$1" } list_merge_tool_candidates () { @@ -174,22 +262,61 @@ list_merge_tool_candidates () { esac } +show_tool_help () { + tool_opt="'git ${TOOL_MODE}tool --tool-<tool>'" + + tab=' ' + LF=' +' + any_shown=no + + cmd_name=${TOOL_MODE}tool + config_tools=$({ + diff_mode && list_config_tools difftool "$tab$tab" + list_config_tools mergetool "$tab$tab" + } | sort) + extra_content= + if test -n "$config_tools" + then + extra_content="${tab}user-defined:${LF}$config_tools" + fi + + show_tool_names 'mode_ok && is_available' "$tab$tab" \ + "$tool_opt may be set to one of the following:" \ + "No suitable tool for 'git $cmd_name --tool=<tool>' found." \ + "$extra_content" && + any_shown=yes + + show_tool_names 'mode_ok && ! is_available' "$tab$tab" \ + "${LF}The following tools are valid, but not currently available:" && + any_shown=yes + + if test "$any_shown" = yes + then + echo + echo "Some of the tools listed above only work in a windowed" + echo "environment. If run in a terminal-only session, they will fail." + fi + exit 0 +} + guess_merge_tool () { list_merge_tool_candidates - echo >&2 "merge tool candidates: $tools" + cat >&2 <<-EOF + + This message is displayed because '$TOOL_MODE.tool' is not configured. + See 'git ${TOOL_MODE}tool --tool-help' or 'git help config' for more details. + 'git ${TOOL_MODE}tool' will now attempt to use one of the following tools: + $tools + EOF # Loop over each candidate and stop when a valid merge tool is found. - for i in $tools + for tool in $tools do - merge_tool_path="$(translate_merge_tool_path "$i")" - if type "$merge_tool_path" >/dev/null 2>&1 - then - echo "$i" - return 0 - fi + is_available "$tool" && echo "$tool" && return 0 done - echo >&2 "No known merge resolution program available." + echo >&2 "No known ${TOOL_MODE} tool is available." return 1 } @@ -228,7 +355,7 @@ get_merge_tool_path () { fi if test -z "$merge_tool_path" then - merge_tool_path="$(translate_merge_tool_path "$merge_tool")" + merge_tool_path=$(translate_merge_tool_path "$merge_tool") fi if test -z "$(get_merge_tool_cmd "$merge_tool")" && ! type "$merge_tool_path" >/dev/null 2>&1 @@ -242,11 +369,11 @@ get_merge_tool_path () { get_merge_tool () { # Check if a merge tool has been configured - merge_tool="$(get_configured_merge_tool)" + merge_tool=$(get_configured_merge_tool) # Try to guess an appropriate merge tool if no tool has been set. if test -z "$merge_tool" then - merge_tool="$(guess_merge_tool)" || exit + merge_tool=$(guess_merge_tool) || exit fi echo "$merge_tool" } |