diff options
Diffstat (limited to 'git-sh-setup.sh')
| -rw-r--r--[-rwxr-xr-x] | git-sh-setup.sh | 376 |
1 files changed, 329 insertions, 47 deletions
diff --git a/git-sh-setup.sh b/git-sh-setup.sh index f24c7f2d23..4691fbcb64 100755..100644 --- a/git-sh-setup.sh +++ b/git-sh-setup.sh @@ -1,25 +1,141 @@ -#!/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 be taken to unexpected places. If you +# 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 -die() { - echo >&2 "$@" - exit 1 +# Similarly for IFS, but some shells (e.g. FreeBSD 7.2) are buggy and +# do not equate an unset IFS with IFS with the default, so here is +# an explicit SP HT LF. +IFS=' +' + +git_broken_path_fix () { + case ":$PATH:" in + *:$1:*) : ok ;; + *) + PATH=$( + SANE_TOOL_PATH="$1" + IFS=: path= sep= + set x $PATH + shift + for elem + do + case "$SANE_TOOL_PATH:$elem" in + (?*:/bin | ?*:/usr/bin) + path="$path$sep$SANE_TOOL_PATH" + sep=: + SANE_TOOL_PATH= + esac + path="$path$sep$elem" + sep=: + done + echo "$path" + ) + ;; + esac +} + +# @@BROKEN_PATH_FIX@@ + +die () { + die_with_status 1 "$@" } -usage() { - die "Usage: $0 $USAGE" +die_with_status () { + status=$1 + shift + printf >&2 '%s\n' "$*" + exit "$status" } +GIT_QUIET= + +say () { + if test -z "$GIT_QUIET" + then + printf '%s\n' "$*" + fi +} + +if test -n "$OPTIONS_SPEC"; then + usage() { + "$0" -h + exit 1 + } + + parseopt_extra= + [ -n "$OPTIONS_KEEPDASHDASH" ] && + parseopt_extra="--keep-dashdash" + [ -n "$OPTIONS_STUCKLONG" ] && + parseopt_extra="$parseopt_extra --stuck-long" + + eval "$( + echo "$OPTIONS_SPEC" | + git rev-parse --parseopt $parseopt_extra -- "$@" || + echo exit $? + )" +else + dashless=$(basename -- "$0" | sed -e 's/-/ /') + usage() { + die "usage: $dashless $USAGE" + } + + if [ -z "$LONG_USAGE" ] + then + LONG_USAGE="usage: $dashless $USAGE" + else + LONG_USAGE="usage: $dashless $USAGE + +$LONG_USAGE" + fi + + case "$1" in + -h) + echo "$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 @@ -28,56 +144,222 @@ set_reflog_action() { fi } +git_editor() { + if test -z "${GIT_EDITOR:+set}" + then + GIT_EDITOR="$(git var GIT_EDITOR)" || return $? + fi + + eval "$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" '"$@"' +} + +sane_grep () { + GREP_OPTIONS= LC_ALL=C grep "$@" +} + +sane_egrep () { + GREP_OPTIONS= LC_ALL=C egrep "$@" +} + is_bare_repository () { - git-config --bool --get core.bare || - case "$GIT_DIR" in - .git | */.git) echo false ;; - *) echo true ;; - esac + git rev-parse --is-bare-repository } cd_to_toplevel () { - cdup=$(git-rev-parse --show-cdup) - if test ! -z "$cdup" + cdup=$(git rev-parse --show-toplevel) && + cd "$cdup" || { + echo >&2 "Cannot chdir to $cdup, the toplevel of the working tree" + exit 1 + } +} + +require_work_tree_exists () { + if test "z$(git rev-parse --is-bare-repository)" != zfalse then - cd "$cdup" || { - echo >&2 "Cannot chdir to $cdup, the toplevel of the working tree" - exit 1 - } + die "fatal: $0 cannot be used without a working tree." fi } require_work_tree () { - test $(is_bare_repository) = false && - test $(git-rev-parse --is-inside-git-dir) = false || + test "$(git rev-parse --is-inside-work-tree 2>/dev/null)" = true || die "fatal: $0 cannot be used without a working tree." } -if [ -z "$LONG_USAGE" ] -then - LONG_USAGE="Usage: $0 $USAGE" -else - LONG_USAGE="Usage: $0 $USAGE +require_clean_work_tree () { + git rev-parse --verify HEAD >/dev/null || exit 1 + git update-index -q --ignore-submodules --refresh + err=0 -$LONG_USAGE" -fi + 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 -case "$1" in - -h|--h|--he|--hel|--help) - echo "$LONG_USAGE" - exit + 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 "$@")" +} + +# Parse the author from a commit given as an argument. Stdout is suitable for +# feeding to eval to set the usual GIT_* ident variables. +get_author_ident_from_commit () { + encoding=$(git config i18n.commitencoding || echo UTF-8) + git show -s --pretty=raw --encoding="$encoding" "$1" -- | + 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 "$1" in + /*) + return 0 ;; + esac + return 1 + } esac -# Make sure we are in a valid repository of a vintage we understand. -if [ -z "$SUBDIRECTORY_OK" ] -then - : ${GIT_DIR=.git} - GIT_DIR=$(GIT_DIR="$GIT_DIR" git-rev-parse --git-dir) || { - exit=$? - echo >&2 "You need to run this command from the toplevel of the working tree." - exit $exit +# Make sure we are in a valid repository of a vintage we understand, +# if we require to be in a git repository. +git_dir_init () { + GIT_DIR=$(git rev-parse --git-dir) || exit + if [ -z "$SUBDIRECTORY_OK" ] + then + test -z "$(git rev-parse --show-cdup)" || { + exit=$? + echo >&2 "You need to run this command from the toplevel of the working tree." + exit $exit + } + fi + test -n "$GIT_DIR" && GIT_DIR=$(cd "$GIT_DIR" && pwd) || { + echo >&2 "Unable to determine absolute path of git directory" + exit 1 } -else - GIT_DIR=$(git-rev-parse --git-dir) || exit + : ${GIT_OBJECT_DIRECTORY="$(git rev-parse --git-path objects)"} +} + +if test -z "$NONGIT_OK" +then + git_dir_init fi -: ${GIT_OBJECT_DIRECTORY="$GIT_DIR/objects"} + +peel_committish () { + case "$1" in + :/*) + peeltmp=$(git rev-parse --verify "$1") && + git rev-parse --verify "${peeltmp}^0" + ;; + *) + git rev-parse --verify "${1}^0" + ;; + esac +} |