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-rwxr-xr-xcontrib/completion/git-completion.bash158
1 files changed, 150 insertions, 8 deletions
diff --git a/contrib/completion/git-completion.bash b/contrib/completion/git-completion.bash
index 1487437..6756990 100755
--- a/contrib/completion/git-completion.bash
+++ b/contrib/completion/git-completion.bash
@@ -42,6 +42,24 @@
# 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, and "<>"
+# indicates you have diverged. 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.
+#
+#
# To submit patches:
#
# *) Read Documentation/SubmittingPatches
@@ -78,14 +96,133 @@ __gitdir ()
fi
}
+# stores the divergence from upstream in $p
+# used by GIT_PS1_SHOWUPSTREAM
+__git_ps1_show_upstream ()
+{
+ local key value
+ local svn_remote=() svn_url_pattern count n
+ local upstream=git legacy="" verbose=""
+
+ # get some config options from git-config
+ while read key value; do
+ case "$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 < <(git config -z --get-regexp '^(svn-remote\..*\.url|bash\.showupstream)$' 2>/dev/null | tr '\0\n' '\n ')
+
+ # 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: \(${svn_url_pattern:2}\)" 2>/dev/null))
+ if [[ 0 -ne ${#svn_upstream[@]} ]]; then
+ svn_upstream=${svn_upstream[ ${#svn_upstream[@]} - 2 ]}
+ svn_upstream=${svn_upstream%@*}
+ for ((n=1; "$n" <= "${#svn_remote[@]}"; ++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
+ "<"*) let ++behind
+ ;;
+ *) let ++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
+ local r=""
+ local b=""
if [ -f "$g/rebase-merge/interactive" ]; then
r="|REBASE-i"
b="$(cat "$g/rebase-merge/head-name")"
@@ -127,11 +264,12 @@ __git_ps1 ()
}
fi
- local w
- local i
- local s
- local u
- local c
+ local w=""
+ local i=""
+ local s=""
+ local u=""
+ local c=""
+ local p=""
if [ "true" = "$(git rev-parse --is-inside-git-dir 2>/dev/null)" ]; then
if [ "true" = "$(git rev-parse --is-bare-repository 2>/dev/null)" ]; then
@@ -159,10 +297,14 @@ __git_ps1 ()
u="%"
fi
fi
+
+ if [ -n "${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"
+ printf "${1:- (%s)}" "$c${b##refs/heads/}${f:+ $f}$r$p"
fi
}