5220b7589b
Fix unnecessarily waste in the idiomatic use of ': ${VAR=default}'
to set the default value, without enclosing it in double quotes.
* lc/shell-default-value-noexpand:
sh-setup: enclose setting of ${VAR=default} in double-quotes
366 lines
8.2 KiB
Bash
366 lines
8.2 KiB
Bash
# This shell scriplet is meant to be included by other shell scripts
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# to set up some variables pointing at the normal git directories and
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# a few helper shell functions.
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# Having this variable in your environment would break scripts because
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# you would cause "cd" to be taken to unexpected places. If you
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# like CDPATH, define it for your interactive shell sessions without
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# exporting it.
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# But we protect ourselves from such a user mistake nevertheless.
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unset CDPATH
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# Similarly for IFS, but some shells (e.g. FreeBSD 7.2) are buggy and
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# do not equate an unset IFS with IFS with the default, so here is
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# an explicit SP HT LF.
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IFS='
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'
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git_broken_path_fix () {
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case ":$PATH:" in
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*:$1:*) : ok ;;
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*)
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PATH=$(
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SANE_TOOL_PATH="$1"
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IFS=: path= sep=
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set x $PATH
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shift
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for elem
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do
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case "$SANE_TOOL_PATH:$elem" in
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(?*:/bin | ?*:/usr/bin)
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path="$path$sep$SANE_TOOL_PATH"
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sep=:
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SANE_TOOL_PATH=
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esac
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path="$path$sep$elem"
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sep=:
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done
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echo "$path"
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)
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;;
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esac
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}
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# @@BROKEN_PATH_FIX@@
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die () {
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die_with_status 1 "$@"
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}
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die_with_status () {
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status=$1
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shift
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printf >&2 '%s\n' "$*"
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exit "$status"
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}
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GIT_QUIET=
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say () {
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if test -z "$GIT_QUIET"
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then
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printf '%s\n' "$*"
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fi
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}
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if test -n "$OPTIONS_SPEC"; then
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usage() {
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"$0" -h
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exit 1
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}
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parseopt_extra=
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[ -n "$OPTIONS_KEEPDASHDASH" ] &&
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parseopt_extra="--keep-dashdash"
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[ -n "$OPTIONS_STUCKLONG" ] &&
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parseopt_extra="$parseopt_extra --stuck-long"
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eval "$(
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echo "$OPTIONS_SPEC" |
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git rev-parse --parseopt $parseopt_extra -- "$@" ||
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echo exit $?
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)"
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else
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dashless=$(basename -- "$0" | sed -e 's/-/ /')
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usage() {
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die "usage: $dashless $USAGE"
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}
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if [ -z "$LONG_USAGE" ]
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then
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LONG_USAGE="usage: $dashless $USAGE"
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else
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LONG_USAGE="usage: $dashless $USAGE
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$LONG_USAGE"
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fi
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case "$1" in
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-h)
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echo "$LONG_USAGE"
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exit
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esac
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fi
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# Set the name of the end-user facing command in the reflog when the
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# script may update refs. When GIT_REFLOG_ACTION is already set, this
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# will not overwrite it, so that a scripted Porcelain (e.g. "git
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# rebase") can set it to its own name (e.g. "rebase") and then call
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# another scripted Porcelain (e.g. "git am") and a call to this
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# function in the latter will keep the name of the end-user facing
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# program (e.g. "rebase") in GIT_REFLOG_ACTION, ensuring whatever it
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# does will be record as actions done as part of the end-user facing
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# operation (e.g. "rebase").
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#
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# NOTE NOTE NOTE: consequently, after assigning a specific message to
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# GIT_REFLOG_ACTION when calling a "git" command to record a custom
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# reflog message, do not leave that custom value in GIT_REFLOG_ACTION,
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# after you are done. Other callers of "git" commands that rely on
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# writing the default "program name" in reflog expect the variable to
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# contain the value set by this function.
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#
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# To use a custom reflog message, do either one of these three:
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#
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# (a) use a single-shot export form:
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# GIT_REFLOG_ACTION="$GIT_REFLOG_ACTION: preparing frotz" \
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# git command-that-updates-a-ref
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#
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# (b) save the original away and restore:
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# SAVED_ACTION=$GIT_REFLOG_ACTION
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# GIT_REFLOG_ACTION="$GIT_REFLOG_ACTION: preparing frotz"
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# git command-that-updates-a-ref
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# GIT_REFLOG_ACITON=$SAVED_ACTION
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#
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# (c) assign the variable in a subshell:
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# (
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# GIT_REFLOG_ACTION="$GIT_REFLOG_ACTION: preparing frotz"
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# git command-that-updates-a-ref
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# )
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set_reflog_action() {
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if [ -z "${GIT_REFLOG_ACTION:+set}" ]
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then
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GIT_REFLOG_ACTION="$*"
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export GIT_REFLOG_ACTION
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fi
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}
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git_editor() {
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if test -z "${GIT_EDITOR:+set}"
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then
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GIT_EDITOR="$(git var GIT_EDITOR)" || return $?
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fi
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eval "$GIT_EDITOR" '"$@"'
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}
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git_pager() {
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if test -t 1
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then
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GIT_PAGER=$(git var GIT_PAGER)
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else
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GIT_PAGER=cat
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fi
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: "${LESS=-FRX}"
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: "${LV=-c}"
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export LESS LV
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eval "$GIT_PAGER" '"$@"'
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}
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sane_grep () {
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GREP_OPTIONS= LC_ALL=C grep @@SANE_TEXT_GREP@@ "$@"
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}
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sane_egrep () {
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GREP_OPTIONS= LC_ALL=C egrep @@SANE_TEXT_GREP@@ "$@"
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}
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is_bare_repository () {
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git rev-parse --is-bare-repository
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}
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cd_to_toplevel () {
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cdup=$(git rev-parse --show-toplevel) &&
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cd "$cdup" || {
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echo >&2 "Cannot chdir to $cdup, the toplevel of the working tree"
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exit 1
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}
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}
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require_work_tree_exists () {
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if test "z$(git rev-parse --is-bare-repository)" != zfalse
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then
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die "fatal: $0 cannot be used without a working tree."
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fi
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}
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require_work_tree () {
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test "$(git rev-parse --is-inside-work-tree 2>/dev/null)" = true ||
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die "fatal: $0 cannot be used without a working tree."
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}
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require_clean_work_tree () {
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git rev-parse --verify HEAD >/dev/null || exit 1
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git update-index -q --ignore-submodules --refresh
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err=0
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if ! git diff-files --quiet --ignore-submodules
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then
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echo >&2 "Cannot $1: You have unstaged changes."
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err=1
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fi
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if ! git diff-index --cached --quiet --ignore-submodules HEAD --
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then
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if [ $err = 0 ]
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then
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echo >&2 "Cannot $1: Your index contains uncommitted changes."
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else
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echo >&2 "Additionally, your index contains uncommitted changes."
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fi
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err=1
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fi
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if [ $err = 1 ]
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then
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test -n "$2" && echo >&2 "$2"
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exit 1
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fi
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}
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# Generate a sed script to parse identities from a commit.
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#
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# Reads the commit from stdin, which should be in raw format (e.g., from
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# cat-file or "--pretty=raw").
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#
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# The first argument specifies the ident line to parse (e.g., "author"), and
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# the second specifies the environment variable to put it in (e.g., "AUTHOR"
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# for "GIT_AUTHOR_*"). Multiple pairs can be given to parse author and
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# committer.
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pick_ident_script () {
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while test $# -gt 0
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do
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lid=$1; shift
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uid=$1; shift
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printf '%s' "
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/^$lid /{
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s/'/'\\\\''/g
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h
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s/^$lid "'\([^<]*\) <[^>]*> .*$/\1/'"
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s/.*/GIT_${uid}_NAME='&'/p
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g
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s/^$lid "'[^<]* <\([^>]*\)> .*$/\1/'"
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s/.*/GIT_${uid}_EMAIL='&'/p
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g
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s/^$lid "'[^<]* <[^>]*> \(.*\)$/@\1/'"
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s/.*/GIT_${uid}_DATE='&'/p
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}
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"
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done
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echo '/^$/q'
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}
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# Create a pick-script as above and feed it to sed. Stdout is suitable for
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# feeding to eval.
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parse_ident_from_commit () {
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LANG=C LC_ALL=C sed -ne "$(pick_ident_script "$@")"
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}
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# Parse the author from a commit given as an argument. Stdout is suitable for
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# feeding to eval to set the usual GIT_* ident variables.
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get_author_ident_from_commit () {
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encoding=$(git config i18n.commitencoding || echo UTF-8)
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git show -s --pretty=raw --encoding="$encoding" "$1" -- |
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parse_ident_from_commit author AUTHOR
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}
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# Clear repo-local GIT_* environment variables. Useful when switching to
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# another repository (e.g. when entering a submodule). See also the env
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# list in git_connect()
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clear_local_git_env() {
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unset $(git rev-parse --local-env-vars)
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}
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# Generate a virtual base file for a two-file merge. Uses git apply to
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# remove lines from $1 that are not in $2, leaving only common lines.
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create_virtual_base() {
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sz0=$(wc -c <"$1")
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@@DIFF@@ -u -La/"$1" -Lb/"$1" "$1" "$2" | git apply --no-add
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sz1=$(wc -c <"$1")
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# If we do not have enough common material, it is not
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# worth trying two-file merge using common subsections.
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expr $sz0 \< $sz1 \* 2 >/dev/null || : >"$1"
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}
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# Platform specific tweaks to work around some commands
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case $(uname -s) in
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*MINGW*)
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# Windows has its own (incompatible) sort and find
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sort () {
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/usr/bin/sort "$@"
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}
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find () {
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/usr/bin/find "$@"
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}
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# git sees Windows-style pwd
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pwd () {
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builtin pwd -W
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}
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is_absolute_path () {
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case "$1" in
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[/\\]* | [A-Za-z]:*)
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return 0 ;;
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esac
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return 1
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}
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;;
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*)
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is_absolute_path () {
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case "$1" in
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/*)
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return 0 ;;
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esac
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return 1
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}
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esac
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# Make sure we are in a valid repository of a vintage we understand,
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# if we require to be in a git repository.
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git_dir_init () {
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GIT_DIR=$(git rev-parse --git-dir) || exit
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if [ -z "$SUBDIRECTORY_OK" ]
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then
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test -z "$(git rev-parse --show-cdup)" || {
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exit=$?
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echo >&2 "You need to run this command from the toplevel of the working tree."
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exit $exit
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}
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fi
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test -n "$GIT_DIR" && GIT_DIR=$(cd "$GIT_DIR" && pwd) || {
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echo >&2 "Unable to determine absolute path of git directory"
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exit 1
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}
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: "${GIT_OBJECT_DIRECTORY="$(git rev-parse --git-path objects)"}"
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}
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if test -z "$NONGIT_OK"
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then
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git_dir_init
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fi
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peel_committish () {
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case "$1" in
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:/*)
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peeltmp=$(git rev-parse --verify "$1") &&
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git rev-parse --verify "${peeltmp}^0"
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;;
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*)
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git rev-parse --verify "${1}^0"
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;;
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esac
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}
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