[RFC/PATCH] __git_ps1: migrate out of contrib/completion
Different installers put the git-prompt.sh shell library at different places on the installed system, so there is no shared location users can count on:
Fedora - /etc/profile.d/git-prompt.sh
Gentoo - /usr/share/bash-completion/git-prompt
Arch - /usr/share/git/git-prompt.sh
The __git_ps1 helper doesn't have anything to do with bash completion in principle, but because it was written in the context of that project, its sources are kept in contrib/completion/git-prompt.sh. Let's make it a first-class shell library in the toplevel and install it to $(gitexecdir) alongside git-sh-setup and git-sh-i18n, where it can be easily found.
Keep a symlink in contrib/completion/ to avoid breaking setups where this library is used directly from the source tree.
Now you can put the following in your ~/.bashrc:
if test "${BASH+set}" && test "${PS1+set}" # interactive!
then
gitexecdir=$(git --exec-path)
if test -r "$gitexecdir/git-sh-prompt)"
then
. "$gitexecdir/git-sh-prompt"
fi
if type -t __git_ps1 >/dev/null
then
PS1='\w$(__git_ps1)\$ '
fi
fiand the shell prompt will show the current branch name in git repositories when on a machine with a new enough version of git.
Reported-by: Danny Yates <mail4danny@googlemail.com>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
---
Danny Yates wrote:
> Would that not give the impression of "git sh-prompt" being a core
> command? If so, that would be poor, IMHO.
Not any more than $(git --exec-path)/git-sh-setup and git-sh-i18n. :)
Show 5 quoted lines
> When I was investigating this last night, I expected to find it
> (git-prompt.sh) in contrib, although that doesn't make an enormous
> amount of sense. Ideally, the full path to wherever it's installed
> should be mentioned in the bash completion file (which is where I
> went to look when __git_ps1 stopped working),
> but that would mean
> modifying a file from upstream and I'm not sure if that's easy/"the
> done thing".
We're talking on the upstream list now, so that's not an issue.
Thanks, Jonathan
Documentation/git-sh-prompt.txt | 79 ++++++
Makefile | 1 +
contrib/completion/git-completion.bash | 2 +-
contrib/completion/git-prompt.sh | 291 +--------------------
.../completion/git-prompt.sh => git-sh-prompt.sh | 0
5 files changed, 82 insertions(+), 291 deletions(-)
create mode 100644 Documentation/git-sh-prompt.txt
rewrite contrib/completion/git-prompt.sh (100%)
mode change 100644 => 120000
rename contrib/completion/git-prompt.sh => git-sh-prompt.sh (100%)
Show changes to 4 files +82 −291
Documentation/git-sh-prompt.txt, Makefile, contrib/completion/git-completion.bash, contrib/completion/git-prompt.sh
diff --git a/Documentation/git-sh-prompt.txt b/Documentation/git-sh-prompt.txt
new file mode 100644
index 00000000..2c705fef
--- /dev/null
+++ b/Documentation/git-sh-prompt.txt
@@ -0,0 +1,79 @@
+git-sh-prompt(1)
+================
+
+NAME
+----
+git-sh-prompt - Functions to describe repository in bash or zsh prompt
+
+SYNOPSIS
+--------
+[verse]
+'. "$(git --exec-path)/git-sh-prompt"'
+
+DESCRIPTION
+-----------
+This script allows you to see the current branch in your bash prompt.
+
+To enable:
+
+1. Add the following line to your .bashrc and .zshrc:
+
+ . "$(git --exec-path)/git-sh-prompt"
+
+2. Change your PS1 to also show the current branch:
+
+ Bash: PS1='[\u@\h \W$(__git_ps1 " (%s)")]\$ '
+ Zsh: PS1='[%n@%m %c$(__git_ps1 " (%s)")]\$ '
+
+The argument to __git_ps1 will only be displayed if you are currently
+in a git repository. The %s token is replaced by the name of the current
+branch.
+
+In addition, if you set GIT_PS1_SHOWDIRTYSTATE to a nonempty value,
+unstaged (`*`) and staged (`+`) changes are indicated next to the branch
+name. You can configure this per repository with the `bash.showDirtyState`
+variable, which defaults to `true` once GIT_PS1_SHOWDIRTYSTATE is enabled.
+
+You can also see if something is currently stashed, by setting
+GIT_PS1_SHOWSTASHSTATE to a nonempty value. If something is stashed,
+then a '$' is shown next to the branch name.
+
+If you would like to see if there are untracked files, set
+GIT_PS1_SHOWUNTRACKEDFILES to a nonempty value. If there are untracked
+files, a '%' is shown next to the branch name.
+
+If you would like to see the difference between HEAD and its upstream,
+set GIT_PS1_SHOWUPSTREAM=auto. A '<' indicates the current branch is
+behind, '>' indicates it is ahead, '<>' indicates it has diverged, and
+'=' indicates no difference. You can further control behavior by
+setting GIT_PS1_SHOWUPSTREAM to a space-separated list of values:
+
+verbose::
+ show number of commits ahead of/behind (+/-) upstream
+legacy::
+ don't use the '--count' option available in recent versions
+ of git-rev-list
+git::
+ always compare HEAD to `@{upstream}`
+svn::
+ always compare HEAD to your 'git svn' upstream
+
+By default, __git_ps1 compares HEAD to your 'git svn' upstream if it can
+find one, or `@{upstream}` otherwise. Once you have set GIT_PS1_SHOWUPSTREAM,
+you can override it on a per-repository basis by setting the `bash.showUpstream`
+config variable.
+
+FUNCTIONS
+---------
+
+'__gitdir' [<directory>]::
+ Print the path to the git repository (`.git` directory). This is
+ similar to `git rev-parse --git-dir` but it is faster because it avoids
+ forking a new process when possible.
+
+'__git_ps1_show_upstream'::
+ Internal function.
+
+'__git_ps1 [<format>]'::
+ Print text to add to the shell's PS1 prompt, including the current
+ branch name. If <format> is not specified, it defaults to " (%s)".
diff --git a/Makefile b/Makefile
index f69979e3..c12d973b 100644
--- a/Makefile
+++ b/Makefile
@@ -459,6 +459,7 @@ SCRIPT_LIB += git-rebase--interactive
SCRIPT_LIB += git-rebase--merge
SCRIPT_LIB += git-sh-setup
SCRIPT_LIB += git-sh-i18n
+SCRIPT_LIB += git-sh-prompt
SCRIPT_PERL += git-add--interactive.perl
SCRIPT_PERL += git-difftool.perl
diff --git a/contrib/completion/git-completion.bash b/contrib/completion/git-completion.bash
index be800e09..01238588 100644
--- a/contrib/completion/git-completion.bash
+++ b/contrib/completion/git-completion.bash
@@ -21,7 +21,7 @@
# 2) Add the following line to your .bashrc/.zshrc:
# source ~/.git-completion.sh
# 3) Consider changing your PS1 to also show the current branch,
-# see git-prompt.sh for details.
+# see git-sh-prompt(1) for details.
if [[ -n ${ZSH_VERSION-} ]]; then
autoload -U +X bashcompinit && bashcompinit
diff --git a/contrib/completion/git-prompt.sh b/contrib/completion/git-prompt.sh
deleted file mode 100644
index bf20491e..00000000
--- a/contrib/completion/git-prompt.sh
+++ /dev/null
@@ -1,290 +0,0 @@
-# bash/zsh git prompt support
-#
-# Copyright (C) 2006,2007 Shawn O. Pearce <spearce@spearce.org>
-# Distributed under the GNU General Public License, version 2.0.
-#
-# This script allows you to see the current branch in your prompt.
-#
-# To enable:
-#
-# 1) Copy this file to somewhere (e.g. ~/.git-prompt.sh).
-# 2) Add the following line to your .bashrc/.zshrc:
-# source ~/.git-prompt.sh
-# 3) Change your PS1 to also show the current branch:
-# Bash: PS1='[\u@\h \W$(__git_ps1 " (%s)")]\$ '
-# ZSH: PS1='[%n@%m %c$(__git_ps1 " (%s)")]\$ '
-#
-# The argument to __git_ps1 will be displayed only if you are currently
-# in a git repository. The %s token will be the name of the current
-# branch.
-#
-# In addition, if you set GIT_PS1_SHOWDIRTYSTATE to a nonempty value,
-# unstaged (*) and staged (+) changes will be shown next to the branch
-# name. You can configure this per-repository with the
-# bash.showDirtyState variable, which defaults to true once
-# GIT_PS1_SHOWDIRTYSTATE is enabled.
-#
-# You can also see if currently something is stashed, by setting
-# GIT_PS1_SHOWSTASHSTATE to a nonempty value. If something is stashed,
-# then a '$' will be shown next to the branch name.
-#
-# If you would like to see if there're untracked files, then you can set
-# GIT_PS1_SHOWUNTRACKEDFILES to a nonempty value. If there're untracked
-# files, then a '%' will be shown next to the branch name.
-#
-# If you would like to see the difference between HEAD and its upstream,
-# set GIT_PS1_SHOWUPSTREAM="auto". A "<" indicates you are behind, ">"
-# indicates you are ahead, "<>" indicates you have diverged and "="
-# indicates that there is no difference. You can further control
-# behaviour by setting GIT_PS1_SHOWUPSTREAM to a space-separated list
-# of values:
-#
-# verbose show number of commits ahead/behind (+/-) upstream
-# legacy don't use the '--count' option available in recent
-# versions of git-rev-list
-# git always compare HEAD to @{upstream}
-# svn always compare HEAD to your SVN upstream
-#
-# By default, __git_ps1 will compare HEAD to your SVN upstream if it can
-# find one, or @{upstream} otherwise. Once you have set
-# GIT_PS1_SHOWUPSTREAM, you can override it on a per-repository basis by
-# setting the bash.showUpstream config variable.
-
-# __gitdir accepts 0 or 1 arguments (i.e., location)
-# returns location of .git repo
-__gitdir ()
-{
- # Note: this function is duplicated in git-completion.bash
- # When updating it, make sure you update the other one to match.
- if [ -z "${1-}" ]; then
- if [ -n "${__git_dir-}" ]; then
- echo "$__git_dir"
- elif [ -n "${GIT_DIR-}" ]; then
- test -d "${GIT_DIR-}" || return 1
- echo "$GIT_DIR"
- elif [ -d .git ]; then
- echo .git
- else
- git rev-parse --git-dir 2>/dev/null
- fi
- elif [ -d "$1/.git" ]; then
- echo "$1/.git"
- else
- echo "$1"
- fi
-}
-
-# stores the divergence from upstream in $p
-# used by GIT_PS1_SHOWUPSTREAM
-__git_ps1_show_upstream ()
-{
- local key value
- local svn_remote svn_url_pattern count n
- local upstream=git legacy="" verbose=""
-
- svn_remote=()
- # get some config options from git-config
- local output="$(git config -z --get-regexp '^(svn-remote\..*\.url|bash\.showupstream)$' 2>/dev/null | tr '\0\n' '\n ')"
- while read -r key value; do
- case "$key" in
- bash.showupstream)
- GIT_PS1_SHOWUPSTREAM="$value"
- if [[ -z "${GIT_PS1_SHOWUPSTREAM}" ]]; then
- p=""
- return
- fi
- ;;
- svn-remote.*.url)
- svn_remote[ $((${#svn_remote[@]} + 1)) ]="$value"
- svn_url_pattern+="\\|$value"
- upstream=svn+git # default upstream is SVN if available, else git
- ;;
- esac
- done <<< "$output"
-
- # parse configuration values
- for option in ${GIT_PS1_SHOWUPSTREAM}; do
- case "$option" in
- git|svn) upstream="$option" ;;
- verbose) verbose=1 ;;
- legacy) legacy=1 ;;
- esac
- done
-
- # Find our upstream
- case "$upstream" in
- git) upstream="@{upstream}" ;;
- svn*)
- # get the upstream from the "git-svn-id: ..." in a commit message
- # (git-svn uses essentially the same procedure internally)
- local svn_upstream=($(git log --first-parent -1 \
- --grep="^git-svn-id: \(${svn_url_pattern#??}\)" 2>/dev/null))
- if [[ 0 -ne ${#svn_upstream[@]} ]]; then
- svn_upstream=${svn_upstream[ ${#svn_upstream[@]} - 2 ]}
- svn_upstream=${svn_upstream%@*}
- local n_stop="${#svn_remote[@]}"
- for ((n=1; n <= n_stop; n++)); do
- svn_upstream=${svn_upstream#${svn_remote[$n]}}
- done
-
- if [[ -z "$svn_upstream" ]]; then
- # default branch name for checkouts with no layout:
- upstream=${GIT_SVN_ID:-git-svn}
- else
- upstream=${svn_upstream#/}
- fi
- elif [[ "svn+git" = "$upstream" ]]; then
- upstream="@{upstream}"
- fi
- ;;
- esac
-
- # Find how many commits we are ahead/behind our upstream
- if [[ -z "$legacy" ]]; then
- count="$(git rev-list --count --left-right \
- "$upstream"...HEAD 2>/dev/null)"
- else
- # produce equivalent output to --count for older versions of git
- local commits
- if commits="$(git rev-list --left-right "$upstream"...HEAD 2>/dev/null)"
- then
- local commit behind=0 ahead=0
- for commit in $commits
- do
- case "$commit" in
- "<"*) ((behind++)) ;;
- *) ((ahead++)) ;;
- esac
- done
- count="$behind $ahead"
- else
- count=""
- fi
- fi
-
- # calculate the result
- if [[ -z "$verbose" ]]; then
- case "$count" in
- "") # no upstream
- p="" ;;
- "0 0") # equal to upstream
- p="=" ;;
- "0 "*) # ahead of upstream
- p=">" ;;
- *" 0") # behind upstream
- p="<" ;;
- *) # diverged from upstream
- p="<>" ;;
- esac
- else
- case "$count" in
- "") # no upstream
- p="" ;;
- "0 0") # equal to upstream
- p=" u=" ;;
- "0 "*) # ahead of upstream
- p=" u+${count#0 }" ;;
- *" 0") # behind upstream
- p=" u-${count% 0}" ;;
- *) # diverged from upstream
- p=" u+${count#* }-${count% *}" ;;
- esac
- fi
-
-}
-
-
-# __git_ps1 accepts 0 or 1 arguments (i.e., format string)
-# returns text to add to bash PS1 prompt (includes branch name)
-__git_ps1 ()
-{
- local g="$(__gitdir)"
- if [ -n "$g" ]; then
- local r=""
- local b=""
- if [ -f "$g/rebase-merge/interactive" ]; then
- r="|REBASE-i"
- b="$(cat "$g/rebase-merge/head-name")"
- elif [ -d "$g/rebase-merge" ]; then
- r="|REBASE-m"
- b="$(cat "$g/rebase-merge/head-name")"
- else
- if [ -d "$g/rebase-apply" ]; then
- if [ -f "$g/rebase-apply/rebasing" ]; then
- r="|REBASE"
- elif [ -f "$g/rebase-apply/applying" ]; then
- r="|AM"
- else
- r="|AM/REBASE"
- fi
- elif [ -f "$g/MERGE_HEAD" ]; then
- r="|MERGING"
- elif [ -f "$g/CHERRY_PICK_HEAD" ]; then
- r="|CHERRY-PICKING"
- elif [ -f "$g/BISECT_LOG" ]; then
- r="|BISECTING"
- fi
-
- b="$(git symbolic-ref HEAD 2>/dev/null)" || {
-
- b="$(
- case "${GIT_PS1_DESCRIBE_STYLE-}" in
- (contains)
- git describe --contains HEAD ;;
- (branch)
- git describe --contains --all HEAD ;;
- (describe)
- git describe HEAD ;;
- (* | default)
- git describe --tags --exact-match HEAD ;;
- esac 2>/dev/null)" ||
-
- b="$(cut -c1-7 "$g/HEAD" 2>/dev/null)..." ||
- b="unknown"
- b="($b)"
- }
- fi
-
- local w=""
- local i=""
- local s=""
- local u=""
- local c=""
- local p=""
-
- if [ "true" = "$(git rev-parse --is-inside-git-dir 2>/dev/null)" ]; then
- if [ "true" = "$(git rev-parse --is-bare-repository 2>/dev/null)" ]; then
- c="BARE:"
- else
- b="GIT_DIR!"
- fi
- elif [ "true" = "$(git rev-parse --is-inside-work-tree 2>/dev/null)" ]; then
- if [ -n "${GIT_PS1_SHOWDIRTYSTATE-}" ]; then
- if [ "$(git config --bool bash.showDirtyState)" != "false" ]; then
- git diff --no-ext-diff --quiet --exit-code || w="*"
- if git rev-parse --quiet --verify HEAD >/dev/null; then
- git diff-index --cached --quiet HEAD -- || i="+"
- else
- i="#"
- fi
- fi
- fi
- if [ -n "${GIT_PS1_SHOWSTASHSTATE-}" ]; then
- git rev-parse --verify refs/stash >/dev/null 2>&1 && s="$"
- fi
-
- if [ -n "${GIT_PS1_SHOWUNTRACKEDFILES-}" ]; then
- if [ -n "$(git ls-files --others --exclude-standard)" ]; then
- u="%"
- fi
- fi
-
- if [ -n "${GIT_PS1_SHOWUPSTREAM-}" ]; then
- __git_ps1_show_upstream
- fi
- fi
-
- local f="$w$i$s$u"
- printf -- "${1:- (%s)}" "$c${b##refs/heads/}${f:+ $f}$r$p"
- fi
-}
diff --git a/contrib/completion/git-prompt.sh b/contrib/completion/git-prompt.sh
new file mode 120000
index 00000000..a4fbb216
--- /dev/null
+++ b/contrib/completion/git-prompt.sh
@@ -0,0 +1 @@
+../../git-sh-prompt.sh
\ No newline at end of file
diff --git a/contrib/completion/git-prompt.sh b/git-sh-prompt.sh
similarity index 100%
rename from contrib/completion/git-prompt.sh
rename to git-sh-prompt.sh
--
1.8.0
Felipe Contreras
