diff options
Diffstat (limited to 'git-sh-setup.sh')
| -rw-r--r--[-rwxr-xr-x] | git-sh-setup.sh | 274 |
1 files changed, 223 insertions, 51 deletions
diff --git a/git-sh-setup.sh b/git-sh-setup.sh index d56426dd39..c42c6e6365 100755..100644 --- a/git-sh-setup.sh +++ b/git-sh-setup.sh @@ -1,16 +1,20 @@ -#!/bin/sh -# -# This is included in commands that either have to be run from the toplevel -# of the repository, or with GIT_DIR environment variable properly. -# If the GIT_DIR does not look like the right correct git-repository, -# it dies. +# This shell scriplet is meant to be included by other shell scripts +# to set up some variables pointing at the normal git directories and +# a few helper shell functions. # Having this variable in your environment would break scripts because # you would cause "cd" to be taken to unexpected places. If you # like CDPATH, define it for your interactive shell sessions without # exporting it. +# But we protect ourselves from such a user mistake nevertheless. unset CDPATH +# Similarly for IFS, but some shells (e.g. FreeBSD 7.2) are buggy and +# do not equate an unset IFS with IFS with the default, so here is +# an explicit SP HT LF. +IFS=' +' + git_broken_path_fix () { case ":$PATH:" in *:$1:*) : ok ;; @@ -39,9 +43,15 @@ git_broken_path_fix () { # @@BROKEN_PATH_FIX@@ -die() { - echo >&2 "$@" - exit 1 +die () { + die_with_status 1 "$@" +} + +die_with_status () { + status=$1 + shift + printf >&2 '%s\n' "$*" + exit "$status" } GIT_QUIET= @@ -62,6 +72,8 @@ if test -n "$OPTIONS_SPEC"; then parseopt_extra= [ -n "$OPTIONS_KEEPDASHDASH" ] && parseopt_extra="--keep-dashdash" + [ -n "$OPTIONS_STUCKLONG" ] && + parseopt_extra="$parseopt_extra --stuck-long" eval "$( echo "$OPTIONS_SPEC" | @@ -69,27 +81,61 @@ if test -n "$OPTIONS_SPEC"; then echo exit $? )" else - dashless=$(basename "$0" | sed -e 's/-/ /') + dashless=$(basename -- "$0" | sed -e 's/-/ /') usage() { - die "Usage: $dashless $USAGE" + die "usage: $dashless $USAGE" } if [ -z "$LONG_USAGE" ] then - LONG_USAGE="Usage: $dashless $USAGE" + LONG_USAGE="usage: $dashless $USAGE" else - LONG_USAGE="Usage: $dashless $USAGE + LONG_USAGE="usage: $dashless $USAGE $LONG_USAGE" fi case "$1" in - -h|--h|--he|--hel|--help) + -h) echo "$LONG_USAGE" exit esac fi +# Set the name of the end-user facing command in the reflog when the +# script may update refs. When GIT_REFLOG_ACTION is already set, this +# will not overwrite it, so that a scripted Porcelain (e.g. "git +# rebase") can set it to its own name (e.g. "rebase") and then call +# another scripted Porcelain (e.g. "git am") and a call to this +# function in the latter will keep the name of the end-user facing +# program (e.g. "rebase") in GIT_REFLOG_ACTION, ensuring whatever it +# does will be record as actions done as part of the end-user facing +# operation (e.g. "rebase"). +# +# NOTE NOTE NOTE: consequently, after assigning a specific message to +# GIT_REFLOG_ACTION when calling a "git" command to record a custom +# reflog message, do not leave that custom value in GIT_REFLOG_ACTION, +# after you are done. Other callers of "git" commands that rely on +# writing the default "program name" in reflog expect the variable to +# contain the value set by this function. +# +# To use a custom reflog message, do either one of these three: +# +# (a) use a single-shot export form: +# GIT_REFLOG_ACTION="$GIT_REFLOG_ACTION: preparing frotz" \ +# git command-that-updates-a-ref +# +# (b) save the original away and restore: +# SAVED_ACTION=$GIT_REFLOG_ACTION +# GIT_REFLOG_ACTION="$GIT_REFLOG_ACTION: preparing frotz" +# git command-that-updates-a-ref +# GIT_REFLOG_ACITON=$SAVED_ACTION +# +# (c) assign the variable in a subshell: +# ( +# GIT_REFLOG_ACTION="$GIT_REFLOG_ACTION: preparing frotz" +# git command-that-updates-a-ref +# ) set_reflog_action() { if [ -z "${GIT_REFLOG_ACTION:+set}" ] then @@ -107,6 +153,20 @@ git_editor() { eval "$GIT_EDITOR" '"$@"' } +git_pager() { + if test -t 1 + then + GIT_PAGER=$(git var GIT_PAGER) + else + GIT_PAGER=cat + fi + : ${LESS=-FRX} + : ${LV=-c} + export LESS LV + + eval "$GIT_PAGER" '"$@"' +} + sane_grep () { GREP_OPTIONS= LC_ALL=C grep "$@" } @@ -127,42 +187,150 @@ cd_to_toplevel () { } } +require_work_tree_exists () { + if test "z$(git rev-parse --is-bare-repository)" != zfalse + then + die "fatal: $0 cannot be used without a working tree." + fi +} + require_work_tree () { - test $(git rev-parse --is-inside-work-tree) = true || + test "$(git rev-parse --is-inside-work-tree 2>/dev/null)" = true || die "fatal: $0 cannot be used without a working tree." } +require_clean_work_tree () { + git rev-parse --verify HEAD >/dev/null || exit 1 + git update-index -q --ignore-submodules --refresh + err=0 + + if ! git diff-files --quiet --ignore-submodules + then + echo >&2 "Cannot $1: You have unstaged changes." + err=1 + fi + + if ! git diff-index --cached --quiet --ignore-submodules HEAD -- + then + if [ $err = 0 ] + then + echo >&2 "Cannot $1: Your index contains uncommitted changes." + else + echo >&2 "Additionally, your index contains uncommitted changes." + fi + err=1 + fi + + if [ $err = 1 ] + then + test -n "$2" && echo >&2 "$2" + exit 1 + fi +} + +# Generate a sed script to parse identities from a commit. +# +# Reads the commit from stdin, which should be in raw format (e.g., from +# cat-file or "--pretty=raw"). +# +# The first argument specifies the ident line to parse (e.g., "author"), and +# the second specifies the environment variable to put it in (e.g., "AUTHOR" +# for "GIT_AUTHOR_*"). Multiple pairs can be given to parse author and +# committer. +pick_ident_script () { + while test $# -gt 0 + do + lid=$1; shift + uid=$1; shift + printf '%s' " + /^$lid /{ + s/'/'\\\\''/g + h + s/^$lid "'\([^<]*\) <[^>]*> .*$/\1/'" + s/.*/GIT_${uid}_NAME='&'/p + + g + s/^$lid "'[^<]* <\([^>]*\)> .*$/\1/'" + s/.*/GIT_${uid}_EMAIL='&'/p + + g + s/^$lid "'[^<]* <[^>]*> \(.*\)$/@\1/'" + s/.*/GIT_${uid}_DATE='&'/p + } + " + done + echo '/^$/q' +} + +# Create a pick-script as above and feed it to sed. Stdout is suitable for +# feeding to eval. +parse_ident_from_commit () { + LANG=C LC_ALL=C sed -ne "$(pick_ident_script "$@")" +} + +# Parse the author from a commit given as an argument. Stdout is suitable for +# feeding to eval to set the usual GIT_* ident variables. get_author_ident_from_commit () { - pick_author_script=' - /^author /{ - s/'\''/'\''\\'\'\''/g - h - s/^author \([^<]*\) <[^>]*> .*$/\1/ - s/'\''/'\''\'\'\''/g - s/.*/GIT_AUTHOR_NAME='\''&'\''/p - - g - s/^author [^<]* <\([^>]*\)> .*$/\1/ - s/'\''/'\''\'\'\''/g - s/.*/GIT_AUTHOR_EMAIL='\''&'\''/p - - g - s/^author [^<]* <[^>]*> \(.*\)$/\1/ - s/'\''/'\''\'\'\''/g - s/.*/GIT_AUTHOR_DATE='\''&'\''/p - - q - } - ' encoding=$(git config i18n.commitencoding || echo UTF-8) git show -s --pretty=raw --encoding="$encoding" "$1" -- | - LANG=C LC_ALL=C sed -ne "$pick_author_script" + parse_ident_from_commit author AUTHOR +} + +# Clear repo-local GIT_* environment variables. Useful when switching to +# another repository (e.g. when entering a submodule). See also the env +# list in git_connect() +clear_local_git_env() { + unset $(git rev-parse --local-env-vars) } +# Generate a virtual base file for a two-file merge. Uses git apply to +# remove lines from $1 that are not in $2, leaving only common lines. +create_virtual_base() { + sz0=$(wc -c <"$1") + @@DIFF@@ -u -La/"$1" -Lb/"$1" "$1" "$2" | git apply --no-add + sz1=$(wc -c <"$1") + + # If we do not have enough common material, it is not + # worth trying two-file merge using common subsections. + expr $sz0 \< $sz1 \* 2 >/dev/null || : >"$1" +} + + +# Platform specific tweaks to work around some commands +case $(uname -s) in +*MINGW*) + # Windows has its own (incompatible) sort and find + sort () { + /usr/bin/sort "$@" + } + find () { + /usr/bin/find "$@" + } + # git sees Windows-style pwd + pwd () { + builtin pwd -W + } + is_absolute_path () { + case "$1" in + [/\\]* | [A-Za-z]:*) + return 0 ;; + esac + return 1 + } + ;; +*) + is_absolute_path () { + case "$1" in + /*) + return 0 ;; + esac + return 1 + } +esac + # Make sure we are in a valid repository of a vintage we understand, # if we require to be in a git repository. -if test -z "$NONGIT_OK" -then +git_dir_init () { GIT_DIR=$(git rev-parse --git-dir) || exit if [ -z "$SUBDIRECTORY_OK" ] then @@ -177,17 +345,21 @@ then exit 1 } : ${GIT_OBJECT_DIRECTORY="$GIT_DIR/objects"} +} + +if test -z "$NONGIT_OK" +then + git_dir_init fi -# Fix some commands on Windows -case $(uname -s) in -*MINGW*) - # Windows has its own (incompatible) sort and find - sort () { - /usr/bin/sort "$@" - } - find () { - /usr/bin/find "$@" - } - ;; -esac +peel_committish () { + case "$1" in + :/*) + peeltmp=$(git rev-parse --verify "$1") && + git rev-parse --verify "${peeltmp}^0" + ;; + *) + git rev-parse --verify "${1}^0" + ;; + esac +} |