bash: simple reimplementation of _get_comp_words_by_ref
[gitweb.git] / contrib / completion / git-completion.bash
index aebb0b689040c3f1c1023e3ddf07779178a6bdfb..1747091287a1cabacbcd16ea7274b7ba295d4932 100755 (executable)
 #       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")"
@@ -118,7 +255,7 @@ __git_ps1 ()
                                (describe)
                                        git describe HEAD ;;
                                (* | default)
-                                       git describe --exact-match HEAD ;;
+                                       git describe --tags --exact-match HEAD ;;
                                esac 2>/dev/null)" ||
 
                                b="$(cut -c1-7 "$g/HEAD" 2>/dev/null)..." ||
@@ -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
 }
 
@@ -179,11 +321,141 @@ __gitcomp_1 ()
        done
 }
 
+# The following function is based on code from:
+#
+#   bash_completion - programmable completion functions for bash 3.2+
+#
+#   Copyright © 2006-2008, Ian Macdonald <ian@caliban.org>
+#             © 2009-2010, Bash Completion Maintainers
+#                     <bash-completion-devel@lists.alioth.debian.org>
+#
+#   This program is free software; you can redistribute it and/or modify
+#   it under the terms of the GNU General Public License as published by
+#   the Free Software Foundation; either version 2, or (at your option)
+#   any later version.
+#
+#   This program is distributed in the hope that it will be useful,
+#   but WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#   GNU General Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License
+#   along with this program; if not, write to the Free Software Foundation,
+#   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+#
+#   The latest version of this software can be obtained here:
+#
+#   http://bash-completion.alioth.debian.org/
+#
+#   RELEASE: 2.x
+
+# This function can be used to access a tokenized list of words
+# on the command line:
+#
+#      __git_reassemble_comp_words_by_ref '=:'
+#      if test "${words_[cword_-1]}" = -w
+#      then
+#              ...
+#      fi
+#
+# The argument should be a collection of characters from the list of
+# word completion separators (COMP_WORDBREAKS) to treat as ordinary
+# characters.
+#
+# This is roughly equivalent to going back in time and setting
+# COMP_WORDBREAKS to exclude those characters.  The intent is to
+# make option types like --date=<type> and <rev>:<path> easy to
+# recognize by treating each shell word as a single token.
+#
+# It is best not to set COMP_WORDBREAKS directly because the value is
+# shared with other completion scripts.  By the time the completion
+# function gets called, COMP_WORDS has already been populated so local
+# changes to COMP_WORDBREAKS have no effect.
+#
+# Output: words_, cword_, cur_.
+
+__git_reassemble_comp_words_by_ref()
+{
+       local exclude i j first
+       # Which word separators to exclude?
+       exclude="${1//[^$COMP_WORDBREAKS]}"
+       cword_=$COMP_CWORD
+       if [ -z "$exclude" ]; then
+               words_=("${COMP_WORDS[@]}")
+               return
+       fi
+       # List of word completion separators has shrunk;
+       # re-assemble words to complete.
+       for ((i=0, j=0; i < ${#COMP_WORDS[@]}; i++, j++)); do
+               # Append each nonempty word consisting of just
+               # word separator characters to the current word.
+               first=t
+               while
+                       [ $i -gt 0 ] &&
+                       [ -n "${COMP_WORDS[$i]}" ] &&
+                       # word consists of excluded word separators
+                       [ "${COMP_WORDS[$i]//[^$exclude]}" = "${COMP_WORDS[$i]}" ]
+               do
+                       # Attach to the previous token,
+                       # unless the previous token is the command name.
+                       if [ $j -ge 2 ] && [ -n "$first" ]; then
+                               ((j--))
+                       fi
+                       first=
+                       words_[$j]=${words_[j]}${COMP_WORDS[i]}
+                       if [ $i = $COMP_CWORD ]; then
+                               cword_=$j
+                       fi
+                       if (($i < ${#COMP_WORDS[@]} - 1)); then
+                               ((i++))
+                       else
+                               # Done.
+                               return
+                       fi
+               done
+               words_[$j]=${words_[j]}${COMP_WORDS[i]}
+               if [ $i = $COMP_CWORD ]; then
+                       cword_=$j
+               fi
+       done
+}
+
+if ! type _get_comp_words_by_ref >/dev/null 2>&1; then
+_get_comp_words_by_ref ()
+{
+       local exclude cur_ words_ cword_
+       if [ "$1" = "-n" ]; then
+               exclude=$2
+               shift 2
+       fi
+       __git_reassemble_comp_words_by_ref "$exclude"
+       cur_=${words_[cword_]}
+       while [ $# -gt 0 ]; do
+               case "$1" in
+               cur)
+                       cur=$cur_
+                       ;;
+               prev)
+                       prev=${words_[$cword_-1]}
+                       ;;
+               words)
+                       words=("${words_[@]}")
+                       ;;
+               cword)
+                       cword=$cword_
+                       ;;
+               esac
+               shift
+       done
+}
+fi
+
 # __gitcomp accepts 1, 2, 3, or 4 arguments
 # generates completion reply with compgen
 __gitcomp ()
 {
-       local cur="${COMP_WORDS[COMP_CWORD]}"
+       local cur
+       _get_comp_words_by_ref -n =: cur
        if [ $# -gt 2 ]; then
                cur="$3"
        fi
@@ -242,7 +514,8 @@ __git_tags ()
 __git_refs ()
 {
        local i is_hash=y dir="$(__gitdir "${1-}")"
-       local cur="${COMP_WORDS[COMP_CWORD]}" format refs
+       local cur format refs
+       _get_comp_words_by_ref -n =: cur
        if [ -d "$dir" ]; then
                case "$cur" in
                refs|refs/*)
@@ -340,7 +613,8 @@ __git_compute_merge_strategies ()
 
 __git_complete_file ()
 {
-       local pfx ls ref cur="${COMP_WORDS[COMP_CWORD]}"
+       local pfx ls ref cur
+       _get_comp_words_by_ref -n =: cur
        case "$cur" in
        ?*:*)
                ref="${cur%%:*}"
@@ -388,7 +662,8 @@ __git_complete_file ()
 
 __git_complete_revlist ()
 {
-       local pfx cur="${COMP_WORDS[COMP_CWORD]}"
+       local pfx cur
+       _get_comp_words_by_ref -n =: cur
        case "$cur" in
        *...*)
                pfx="${cur%...*}..."
@@ -408,11 +683,12 @@ __git_complete_revlist ()
 
 __git_complete_remote_or_refspec ()
 {
-       local cmd="${COMP_WORDS[1]}"
-       local cur="${COMP_WORDS[COMP_CWORD]}"
+       local cur words cword
+       _get_comp_words_by_ref -n =: cur words cword
+       local cmd="${words[1]}"
        local i c=2 remote="" pfx="" lhs=1 no_complete_refspec=0
-       while [ $c -lt $COMP_CWORD ]; do
-               i="${COMP_WORDS[c]}"
+       while [ $c -lt $cword ]; do
+               i="${words[c]}"
                case "$i" in
                --mirror) [ "$cmd" = "push" ] && no_complete_refspec=1 ;;
                --all)
@@ -480,13 +756,14 @@ __git_complete_remote_or_refspec ()
 
 __git_complete_strategy ()
 {
+       local cur prev
+       _get_comp_words_by_ref -n =: cur prev
        __git_compute_merge_strategies
-       case "${COMP_WORDS[COMP_CWORD-1]}" in
+       case "$prev" in
        -s|--strategy)
                __gitcomp "$__git_merge_strategies"
                return 0
        esac
-       local cur="${COMP_WORDS[COMP_CWORD]}"
        case "$cur" in
        --strategy=*)
                __gitcomp "$__git_merge_strategies" "" "${cur##--strategy=}"
@@ -646,10 +923,10 @@ __git_aliased_command ()
 # __git_find_on_cmdline requires 1 argument
 __git_find_on_cmdline ()
 {
-       local word subcommand c=1
-
-       while [ $c -lt $COMP_CWORD ]; do
-               word="${COMP_WORDS[c]}"
+       local word subcommand c=1 words cword
+       _get_comp_words_by_ref -n =: words cword
+       while [ $c -lt $cword ]; do
+               word="${words[c]}"
                for subcommand in $1; do
                        if [ "$subcommand" = "$word" ]; then
                                echo "$subcommand"
@@ -662,9 +939,10 @@ __git_find_on_cmdline ()
 
 __git_has_doubledash ()
 {
-       local c=1
-       while [ $c -lt $COMP_CWORD ]; do
-               if [ "--" = "${COMP_WORDS[c]}" ]; then
+       local c=1 words cword
+       _get_comp_words_by_ref -n =: words cword
+       while [ $c -lt $cword ]; do
+               if [ "--" = "${words[c]}" ]; then
                        return 0
                fi
                c=$((++c))
@@ -676,7 +954,8 @@ __git_whitespacelist="nowarn warn error error-all fix"
 
 _git_am ()
 {
-       local cur="${COMP_WORDS[COMP_CWORD]}" dir="$(__gitdir)"
+       local cur dir="$(__gitdir)"
+       _get_comp_words_by_ref -n =: cur
        if [ -d "$dir"/rebase-apply ]; then
                __gitcomp "--skip --continue --resolved --abort"
                return
@@ -700,7 +979,8 @@ _git_am ()
 
 _git_apply ()
 {
-       local cur="${COMP_WORDS[COMP_CWORD]}"
+       local cur
+       _get_comp_words_by_ref -n =: cur
        case "$cur" in
        --whitespace=*)
                __gitcomp "$__git_whitespacelist" "" "${cur##--whitespace=}"
@@ -723,7 +1003,8 @@ _git_add ()
 {
        __git_has_doubledash && return
 
-       local cur="${COMP_WORDS[COMP_CWORD]}"
+       local cur
+       _get_comp_words_by_ref -n =: cur
        case "$cur" in
        --*)
                __gitcomp "
@@ -737,7 +1018,8 @@ _git_add ()
 
 _git_archive ()
 {
-       local cur="${COMP_WORDS[COMP_CWORD]}"
+       local cur
+       _get_comp_words_by_ref -n =: cur
        case "$cur" in
        --format=*)
                __gitcomp "$(git archive --list)" "" "${cur##--format=}"
@@ -781,10 +1063,11 @@ _git_bisect ()
 
 _git_branch ()
 {
-       local i c=1 only_local_ref="n" has_r="n"
+       local i c=1 only_local_ref="n" has_r="n" cur words cword
 
-       while [ $c -lt $COMP_CWORD ]; do
-               i="${COMP_WORDS[c]}"
+       _get_comp_words_by_ref -n =: cur words cword
+       while [ $c -lt $cword ]; do
+               i="${words[c]}"
                case "$i" in
                -d|-m)  only_local_ref="y" ;;
                -r)     has_r="y" ;;
@@ -792,7 +1075,7 @@ _git_branch ()
                c=$((++c))
        done
 
-       case "${COMP_WORDS[COMP_CWORD]}" in
+       case "$cur" in
        --*)
                __gitcomp "
                        --color --no-color --verbose --abbrev= --no-abbrev
@@ -812,8 +1095,10 @@ _git_branch ()
 
 _git_bundle ()
 {
-       local cmd="${COMP_WORDS[2]}"
-       case "$COMP_CWORD" in
+       local words cword
+       _get_comp_words_by_ref -n =: words cword
+       local cmd="${words[2]}"
+       case "$cword" in
        2)
                __gitcomp "create list-heads verify unbundle"
                ;;
@@ -834,7 +1119,8 @@ _git_checkout ()
 {
        __git_has_doubledash && return
 
-       local cur="${COMP_WORDS[COMP_CWORD]}"
+       local cur
+       _get_comp_words_by_ref -n =: cur
        case "$cur" in
        --conflict=*)
                __gitcomp "diff3 merge" "" "${cur##--conflict=}"
@@ -858,7 +1144,8 @@ _git_cherry ()
 
 _git_cherry_pick ()
 {
-       local cur="${COMP_WORDS[COMP_CWORD]}"
+       local cur
+       _get_comp_words_by_ref -n =: cur
        case "$cur" in
        --*)
                __gitcomp "--edit --no-commit"
@@ -873,7 +1160,8 @@ _git_clean ()
 {
        __git_has_doubledash && return
 
-       local cur="${COMP_WORDS[COMP_CWORD]}"
+       local cur
+       _get_comp_words_by_ref -n =: cur
        case "$cur" in
        --*)
                __gitcomp "--dry-run --quiet"
@@ -885,7 +1173,8 @@ _git_clean ()
 
 _git_clone ()
 {
-       local cur="${COMP_WORDS[COMP_CWORD]}"
+       local cur
+       _get_comp_words_by_ref -n =: cur
        case "$cur" in
        --*)
                __gitcomp "
@@ -912,7 +1201,8 @@ _git_commit ()
 {
        __git_has_doubledash && return
 
-       local cur="${COMP_WORDS[COMP_CWORD]}"
+       local cur
+       _get_comp_words_by_ref -n =: cur
        case "$cur" in
        --cleanup=*)
                __gitcomp "default strip verbatim whitespace
@@ -947,7 +1237,8 @@ _git_commit ()
 
 _git_describe ()
 {
-       local cur="${COMP_WORDS[COMP_CWORD]}"
+       local cur
+       _get_comp_words_by_ref -n =: cur
        case "$cur" in
        --*)
                __gitcomp "
@@ -979,7 +1270,8 @@ _git_diff ()
 {
        __git_has_doubledash && return
 
-       local cur="${COMP_WORDS[COMP_CWORD]}"
+       local cur
+       _get_comp_words_by_ref -n =: cur
        case "$cur" in
        --*)
                __gitcomp "--cached --staged --pickaxe-all --pickaxe-regex
@@ -1000,7 +1292,8 @@ _git_difftool ()
 {
        __git_has_doubledash && return
 
-       local cur="${COMP_WORDS[COMP_CWORD]}"
+       local cur
+       _get_comp_words_by_ref -n =: cur
        case "$cur" in
        --tool=*)
                __gitcomp "$__git_mergetools_common kompare" "" "${cur##--tool=}"
@@ -1025,7 +1318,8 @@ __git_fetch_options="
 
 _git_fetch ()
 {
-       local cur="${COMP_WORDS[COMP_CWORD]}"
+       local cur
+       _get_comp_words_by_ref -n =: cur
        case "$cur" in
        --*)
                __gitcomp "$__git_fetch_options"
@@ -1037,7 +1331,8 @@ _git_fetch ()
 
 _git_format_patch ()
 {
-       local cur="${COMP_WORDS[COMP_CWORD]}"
+       local cur
+       _get_comp_words_by_ref -n =: cur
        case "$cur" in
        --thread=*)
                __gitcomp "
@@ -1052,7 +1347,7 @@ _git_format_patch ()
                        --numbered --start-number
                        --numbered-files
                        --keep-subject
-                       --signoff
+                       --signoff --signature --no-signature
                        --in-reply-to= --cc=
                        --full-index --binary
                        --not --all
@@ -1069,7 +1364,8 @@ _git_format_patch ()
 
 _git_fsck ()
 {
-       local cur="${COMP_WORDS[COMP_CWORD]}"
+       local cur
+       _get_comp_words_by_ref -n =: cur
        case "$cur" in
        --*)
                __gitcomp "
@@ -1084,7 +1380,8 @@ _git_fsck ()
 
 _git_gc ()
 {
-       local cur="${COMP_WORDS[COMP_CWORD]}"
+       local cur
+       _get_comp_words_by_ref -n =: cur
        case "$cur" in
        --*)
                __gitcomp "--prune --aggressive"
@@ -1103,7 +1400,8 @@ _git_grep ()
 {
        __git_has_doubledash && return
 
-       local cur="${COMP_WORDS[COMP_CWORD]}"
+       local cur
+       _get_comp_words_by_ref -n =: cur
        case "$cur" in
        --*)
                __gitcomp "
@@ -1126,7 +1424,8 @@ _git_grep ()
 
 _git_help ()
 {
-       local cur="${COMP_WORDS[COMP_CWORD]}"
+       local cur
+       _get_comp_words_by_ref -n =: cur
        case "$cur" in
        --*)
                __gitcomp "--all --info --man --web"
@@ -1144,7 +1443,8 @@ _git_help ()
 
 _git_init ()
 {
-       local cur="${COMP_WORDS[COMP_CWORD]}"
+       local cur
+       _get_comp_words_by_ref -n =: cur
        case "$cur" in
        --shared=*)
                __gitcomp "
@@ -1164,7 +1464,8 @@ _git_ls_files ()
 {
        __git_has_doubledash && return
 
-       local cur="${COMP_WORDS[COMP_CWORD]}"
+       local cur
+       _get_comp_words_by_ref -n =: cur
        case "$cur" in
        --*)
                __gitcomp "--cached --deleted --modified --others --ignored
@@ -1218,12 +1519,13 @@ _git_log ()
 {
        __git_has_doubledash && return
 
-       local cur="${COMP_WORDS[COMP_CWORD]}"
        local g="$(git rev-parse --git-dir 2>/dev/null)"
        local merge=""
        if [ -f "$g/MERGE_HEAD" ]; then
                merge="--merge"
        fi
+       local cur
+       _get_comp_words_by_ref -n =: cur
        case "$cur" in
        --pretty=*)
                __gitcomp "$__git_log_pretty_formats
@@ -1277,7 +1579,8 @@ _git_merge ()
 {
        __git_complete_strategy && return
 
-       local cur="${COMP_WORDS[COMP_CWORD]}"
+       local cur
+       _get_comp_words_by_ref -n =: cur
        case "$cur" in
        --*)
                __gitcomp "$__git_merge_options"
@@ -1288,7 +1591,8 @@ _git_merge ()
 
 _git_mergetool ()
 {
-       local cur="${COMP_WORDS[COMP_CWORD]}"
+       local cur
+       _get_comp_words_by_ref -n =: cur
        case "$cur" in
        --tool=*)
                __gitcomp "$__git_mergetools_common tortoisemerge" "" "${cur##--tool=}"
@@ -1309,7 +1613,8 @@ _git_merge_base ()
 
 _git_mv ()
 {
-       local cur="${COMP_WORDS[COMP_CWORD]}"
+       local cur
+       _get_comp_words_by_ref -n =: cur
        case "$cur" in
        --*)
                __gitcomp "--dry-run"
@@ -1327,12 +1632,14 @@ _git_name_rev ()
 _git_notes ()
 {
        local subcommands="edit show"
+       local words cword
+       _get_comp_words_by_ref -n =: words cword
        if [ -z "$(__git_find_on_cmdline "$subcommands")" ]; then
                __gitcomp "$subcommands"
                return
        fi
 
-       case "${COMP_WORDS[COMP_CWORD-1]}" in
+       case "${words[cword-1]}" in
        -m|-F)
                COMPREPLY=()
                ;;
@@ -1346,7 +1653,8 @@ _git_pull ()
 {
        __git_complete_strategy && return
 
-       local cur="${COMP_WORDS[COMP_CWORD]}"
+       local cur
+       _get_comp_words_by_ref -n =: cur
        case "$cur" in
        --*)
                __gitcomp "
@@ -1362,8 +1670,9 @@ _git_pull ()
 
 _git_push ()
 {
-       local cur="${COMP_WORDS[COMP_CWORD]}"
-       case "${COMP_WORDS[COMP_CWORD-1]}" in
+       local cur prev
+       _get_comp_words_by_ref -n =: cur prev
+       case "$prev" in
        --repo)
                __gitcomp "$(__git_remotes)"
                return
@@ -1386,7 +1695,9 @@ _git_push ()
 
 _git_rebase ()
 {
-       local cur="${COMP_WORDS[COMP_CWORD]}" dir="$(__gitdir)"
+       local dir="$(__gitdir)"
+       local cur
+       _get_comp_words_by_ref -n =: cur
        if [ -d "$dir"/rebase-apply ] || [ -d "$dir"/rebase-merge ]; then
                __gitcomp "--continue --skip --abort"
                return
@@ -1416,7 +1727,8 @@ __git_send_email_suppresscc_options="author self cc bodycc sob cccmd body all"
 
 _git_send_email ()
 {
-       local cur="${COMP_WORDS[COMP_CWORD]}"
+       local cur
+       _get_comp_words_by_ref -n =: cur
        case "$cur" in
        --confirm=*)
                __gitcomp "
@@ -1458,9 +1770,11 @@ _git_stage ()
 
 __git_config_get_set_variables ()
 {
-       local prevword word config_file= c=$COMP_CWORD
+       local words cword
+       _get_comp_words_by_ref -n =: words cword
+       local prevword word config_file= c=$cword
        while [ $c -gt 1 ]; do
-               word="${COMP_WORDS[c]}"
+               word="${words[c]}"
                case "$word" in
                --global|--system|--file=*)
                        config_file="$word"
@@ -1488,9 +1802,9 @@ __git_config_get_set_variables ()
 
 _git_config ()
 {
-       local cur="${COMP_WORDS[COMP_CWORD]}"
-       local prv="${COMP_WORDS[COMP_CWORD-1]}"
-       case "$prv" in
+       local cur prev
+       _get_comp_words_by_ref -n =: cur prev
+       case "$prev" in
        branch.*.remote)
                __gitcomp "$(__git_remotes)"
                return
@@ -1500,13 +1814,13 @@ _git_config ()
                return
                ;;
        remote.*.fetch)
-               local remote="${prv#remote.}"
+               local remote="${prev#remote.}"
                remote="${remote%.fetch}"
                __gitcomp "$(__git_refs_remotes "$remote")"
                return
                ;;
        remote.*.push)
-               local remote="${prv#remote.}"
+               local remote="${prev#remote.}"
                remote="${remote%.push}"
                __gitcomp "$(git --git-dir="$(__gitdir)" \
                        for-each-ref --format='%(refname):%(refname)' \
@@ -1726,6 +2040,7 @@ _git_config ()
                format.headers
                format.numbered
                format.pretty
+               format.signature
                format.signoff
                format.subjectprefix
                format.suffix
@@ -1896,7 +2211,8 @@ _git_reset ()
 {
        __git_has_doubledash && return
 
-       local cur="${COMP_WORDS[COMP_CWORD]}"
+       local cur
+       _get_comp_words_by_ref -n =: cur
        case "$cur" in
        --*)
                __gitcomp "--merge --mixed --hard --soft --patch"
@@ -1908,7 +2224,8 @@ _git_reset ()
 
 _git_revert ()
 {
-       local cur="${COMP_WORDS[COMP_CWORD]}"
+       local cur
+       _get_comp_words_by_ref -n =: cur
        case "$cur" in
        --*)
                __gitcomp "--edit --mainline --no-edit --no-commit --signoff"
@@ -1922,7 +2239,8 @@ _git_rm ()
 {
        __git_has_doubledash && return
 
-       local cur="${COMP_WORDS[COMP_CWORD]}"
+       local cur
+       _get_comp_words_by_ref -n =: cur
        case "$cur" in
        --*)
                __gitcomp "--cached --dry-run --ignore-unmatch --quiet"
@@ -1936,7 +2254,8 @@ _git_shortlog ()
 {
        __git_has_doubledash && return
 
-       local cur="${COMP_WORDS[COMP_CWORD]}"
+       local cur
+       _get_comp_words_by_ref -n =: cur
        case "$cur" in
        --*)
                __gitcomp "
@@ -1954,7 +2273,8 @@ _git_show ()
 {
        __git_has_doubledash && return
 
-       local cur="${COMP_WORDS[COMP_CWORD]}"
+       local cur
+       _get_comp_words_by_ref -n =: cur
        case "$cur" in
        --pretty=*)
                __gitcomp "$__git_log_pretty_formats
@@ -1978,7 +2298,8 @@ _git_show ()
 
 _git_show_branch ()
 {
-       local cur="${COMP_WORDS[COMP_CWORD]}"
+       local cur
+       _get_comp_words_by_ref -n =: cur
        case "$cur" in
        --*)
                __gitcomp "
@@ -1995,7 +2316,8 @@ _git_show_branch ()
 
 _git_stash ()
 {
-       local cur="${COMP_WORDS[COMP_CWORD]}"
+       local cur
+       _get_comp_words_by_ref -n =: cur
        local save_opts='--keep-index --no-keep-index --quiet --patch'
        local subcommands='save list show apply clear drop pop create branch'
        local subcommand="$(__git_find_on_cmdline "$subcommands")"
@@ -2040,7 +2362,8 @@ _git_submodule ()
 
        local subcommands="add status init update summary foreach sync"
        if [ -z "$(__git_find_on_cmdline "$subcommands")" ]; then
-               local cur="${COMP_WORDS[COMP_CWORD]}"
+               local cur
+               _get_comp_words_by_ref -n =: cur
                case "$cur" in
                --*)
                        __gitcomp "--quiet --cached"
@@ -2084,7 +2407,8 @@ _git_svn ()
                        --edit --rmdir --find-copies-harder --copy-similarity=
                        "
 
-               local cur="${COMP_WORDS[COMP_CWORD]}"
+               local cur
+               _get_comp_words_by_ref -n =: cur
                case "$subcommand,$cur" in
                fetch,--*)
                        __gitcomp "--revision= --fetch-all $fc_opts"
@@ -2156,8 +2480,10 @@ _git_svn ()
 _git_tag ()
 {
        local i c=1 f=0
-       while [ $c -lt $COMP_CWORD ]; do
-               i="${COMP_WORDS[c]}"
+       local words cword prev
+       _get_comp_words_by_ref -n =: words cword prev
+       while [ $c -lt $cword ]; do
+               i="${words[c]}"
                case "$i" in
                -d|-v)
                        __gitcomp "$(__git_tags)"
@@ -2170,7 +2496,7 @@ _git_tag ()
                c=$((++c))
        done
 
-       case "${COMP_WORDS[COMP_CWORD-1]}" in
+       case "$prev" in
        -m|-F)
                COMPREPLY=()
                ;;
@@ -2196,8 +2522,10 @@ _git ()
 {
        local i c=1 command __git_dir
 
-       while [ $c -lt $COMP_CWORD ]; do
-               i="${COMP_WORDS[c]}"
+       local cur words cword
+       _get_comp_words_by_ref -n =: cur words cword
+       while [ $c -lt $cword ]; do
+               i="${words[c]}"
                case "$i" in
                --git-dir=*) __git_dir="${i#--git-dir=}" ;;
                --bare)      __git_dir="." ;;
@@ -2209,7 +2537,7 @@ _git ()
        done
 
        if [ -z "$command" ]; then
-               case "${COMP_WORDS[COMP_CWORD]}" in
+               case "$cur" in
                --*)   __gitcomp "
                        --paginate
                        --no-pager
@@ -2242,12 +2570,13 @@ _gitk ()
 {
        __git_has_doubledash && return
 
-       local cur="${COMP_WORDS[COMP_CWORD]}"
+       local cur
        local g="$(__gitdir)"
        local merge=""
        if [ -f "$g/MERGE_HEAD" ]; then
                merge="--merge"
        fi
+       _get_comp_words_by_ref -n =: cur
        case "$cur" in
        --*)
                __gitcomp "