Merge branch 'ks/blame-worktree-textconv-cached'
[gitweb.git] / contrib / completion / git-completion.bash
index 1a762e88e7fcf3b36b3acdffa3e8ec18e3644e2e..803da09a126ad75ad3578a90d117e13cef48ba46 100755 (executable)
 #    2) Added the following line to your .bashrc:
 #        source ~/.git-completion.sh
 #
+#       Or, add the following lines to your .zshrc:
+#        autoload bashcompinit
+#        bashcompinit
+#        source ~/.git-completion.sh
+#
 #    3) Consider changing your PS1 to also show the current branch:
 #        PS1='[\u@\h \W$(__git_ps1 " (%s)")]\$ '
 #
 #       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 +101,134 @@ __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>/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
+                               "<"*) 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 +261,7 @@ __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 +270,12 @@ __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
@@ -159,13 +303,14 @@ __git_ps1 ()
                              u="%"
                           fi
                        fi
-               fi
 
-               if [ -n "${1-}" ]; then
-                       printf "$1" "$c${b##refs/heads/}$w$i$s$u$r"
-               else
-                       printf " (%s)" "$c${b##refs/heads/}$w$i$s$u$r"
+                       if [ -n "${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
 }
 
@@ -241,25 +386,45 @@ __git_tags ()
        done
 }
 
-# __git_refs accepts 0 or 1 arguments (to pass to __gitdir)
+# __git_refs accepts 0, 1 (to pass to __gitdir), or 2 arguments
+# presence of 2nd argument means use the guess heuristic employed
+# by checkout for tracking branches
 __git_refs ()
 {
-       local i is_hash=y dir="$(__gitdir "${1-}")"
+       local i is_hash=y dir="$(__gitdir "${1-}")" track="${2-}"
        local cur="${COMP_WORDS[COMP_CWORD]}" format refs
        if [ -d "$dir" ]; then
                case "$cur" in
                refs|refs/*)
                        format="refname"
                        refs="${cur%/*}"
+                       track=""
                        ;;
                *)
-                       if [ -e "$dir/HEAD" ]; then echo HEAD; fi
+                       for i in HEAD FETCH_HEAD ORIG_HEAD MERGE_HEAD; do
+                               if [ -e "$dir/$i" ]; then echo $i; fi
+                       done
                        format="refname:short"
                        refs="refs/tags refs/heads refs/remotes"
                        ;;
                esac
                git --git-dir="$dir" for-each-ref --format="%($format)" \
                        $refs
+               if [ -n "$track" ]; then
+                       # employ the heuristic used by git checkout
+                       # Try to find a remote branch that matches the completion word
+                       # but only output if the branch name is unique
+                       local ref entry
+                       git --git-dir="$dir" for-each-ref --shell --format="ref=%(refname:short)" \
+                               "refs/remotes/" | \
+                       while read entry; do
+                               eval "$entry"
+                               ref="${ref#*/}"
+                               if [[ "$ref" == "$cur"* ]]; then
+                                       echo "$ref"
+                               fi
+                       done | uniq -u
+               fi
                return
        fi
        for i in $(git ls-remote "$dir" 2>/dev/null); do
@@ -570,7 +735,6 @@ __git_list_porcelain_commands ()
                quiltimport)      : import;;
                read-tree)        : plumbing;;
                receive-pack)     : plumbing;;
-               reflog)           : plumbing;;
                remote-*)         : transport;;
                repo-config)      : deprecated;;
                rerere)           : plumbing;;
@@ -609,6 +773,19 @@ __git_compute_porcelain_commands ()
        : ${__git_porcelain_commands:=$(__git_list_porcelain_commands)}
 }
 
+__git_pretty_aliases ()
+{
+       local i IFS=$'\n'
+       for i in $(git --git-dir="$(__gitdir)" config --get-regexp "pretty\..*" 2>/dev/null); do
+               case "$i" in
+               pretty.*)
+                       i="${i#pretty.}"
+                       echo "${i/ */}"
+                       ;;
+               esac
+       done
+}
+
 __git_aliases ()
 {
        local i IFS=$'\n'
@@ -628,10 +805,19 @@ __git_aliased_command ()
        local word cmdline=$(git --git-dir="$(__gitdir)" \
                config --get "alias.$1")
        for word in $cmdline; do
-               if [ "${word##-*}" ]; then
-                       echo $word
+               case "$word" in
+               \!gitk|gitk)
+                       echo "gitk"
                        return
-               fi
+                       ;;
+               \!*)    : shell command alias ;;
+               -*)     : option ;;
+               *=*)    : setting env ;;
+               git)    : git itself ;;
+               *)
+                       echo "$word"
+                       return
+               esac
        done
 }
 
@@ -670,7 +856,7 @@ _git_am ()
 {
        local cur="${COMP_WORDS[COMP_CWORD]}" dir="$(__gitdir)"
        if [ -d "$dir"/rebase-apply ]; then
-               __gitcomp "--skip --resolved --abort"
+               __gitcomp "--skip --continue --resolved --abort"
                return
        fi
        case "$cur" in
@@ -757,12 +943,16 @@ _git_bisect ()
        local subcommands="start bad good skip reset visualize replay log run"
        local subcommand="$(__git_find_on_cmdline "$subcommands")"
        if [ -z "$subcommand" ]; then
-               __gitcomp "$subcommands"
+               if [ -f "$(__gitdir)"/BISECT_START ]; then
+                       __gitcomp "$subcommands"
+               else
+                       __gitcomp "replay start"
+               fi
                return
        fi
 
        case "$subcommand" in
-       bad|good|reset|skip)
+       bad|good|reset|skip|start)
                __gitcomp "$(__git_refs)"
                ;;
        *)
@@ -789,6 +979,7 @@ _git_branch ()
                __gitcomp "
                        --color --no-color --verbose --abbrev= --no-abbrev
                        --track --no-track --contains --merged --no-merged
+                       --set-upstream
                        "
                ;;
        *)
@@ -833,11 +1024,17 @@ _git_checkout ()
        --*)
                __gitcomp "
                        --quiet --ours --theirs --track --no-track --merge
-                       --conflict= --patch
+                       --conflict= --orphan --patch
                        "
                ;;
        *)
-               __gitcomp "$(__git_refs)"
+               # check if --track, --no-track, or --no-guess was specified
+               # if so, disable DWIM mode
+               local flags="--track --no-track --no-guess" track=1
+               if [ -n "$(__git_find_on_cmdline "$flags")" ]; then
+                       track=''
+               fi
+               __gitcomp "$(__git_refs '' $track)"
                ;;
        esac
 }
@@ -974,7 +1171,7 @@ _git_diff ()
        case "$cur" in
        --*)
                __gitcomp "--cached --staged --pickaxe-all --pickaxe-regex
-                       --base --ours --theirs
+                       --base --ours --theirs --no-index
                        $__git_diff_common_options
                        "
                return
@@ -1043,7 +1240,7 @@ _git_format_patch ()
                        --numbered --start-number
                        --numbered-files
                        --keep-subject
-                       --signoff
+                       --signoff --signature --no-signature
                        --in-reply-to= --cc=
                        --full-index --binary
                        --not --all
@@ -1085,6 +1282,11 @@ _git_gc ()
        COMPREPLY=()
 }
 
+_git_gitk ()
+{
+       _gitk
+}
+
 _git_grep ()
 {
        __git_has_doubledash && return
@@ -1212,12 +1414,12 @@ _git_log ()
        fi
        case "$cur" in
        --pretty=*)
-               __gitcomp "$__git_log_pretty_formats
+               __gitcomp "$__git_log_pretty_formats $(__git_pretty_aliases)
                        " "" "${cur##--pretty=}"
                return
                ;;
        --format=*)
-               __gitcomp "$__git_log_pretty_formats
+               __gitcomp "$__git_log_pretty_formats $(__git_pretty_aliases)
                        " "" "${cur##--format=}"
                return
                ;;
@@ -1310,6 +1512,56 @@ _git_name_rev ()
        __gitcomp "--tags --all --stdin"
 }
 
+_git_notes ()
+{
+       local subcommands='add append copy edit list prune remove show'
+       local subcommand="$(__git_find_on_cmdline "$subcommands")"
+       local cur="${COMP_WORDS[COMP_CWORD]}"
+
+       case "$subcommand,$cur" in
+       ,--*)
+               __gitcomp '--ref'
+               ;;
+       ,*)
+               case "${COMP_WORDS[COMP_CWORD-1]}" in
+               --ref)
+                       __gitcomp "$(__git_refs)"
+                       ;;
+               *)
+                       __gitcomp "$subcommands --ref"
+                       ;;
+               esac
+               ;;
+       add,--reuse-message=*|append,--reuse-message=*)
+               __gitcomp "$(__git_refs)" "" "${cur##--reuse-message=}"
+               ;;
+       add,--reedit-message=*|append,--reedit-message=*)
+               __gitcomp "$(__git_refs)" "" "${cur##--reedit-message=}"
+               ;;
+       add,--*|append,--*)
+               __gitcomp '--file= --message= --reedit-message=
+                               --reuse-message='
+               ;;
+       copy,--*)
+               __gitcomp '--stdin'
+               ;;
+       prune,--*)
+               __gitcomp '--dry-run --verbose'
+               ;;
+       prune,*)
+               ;;
+       *)
+               case "${COMP_WORDS[COMP_CWORD-1]}" in
+               -m|-F)
+                       ;;
+               *)
+                       __gitcomp "$(__git_refs)"
+                       ;;
+               esac
+               ;;
+       esac
+}
+
 _git_pull ()
 {
        __git_complete_strategy && return
@@ -1371,6 +1623,7 @@ _git_rebase ()
                        --preserve-merges --stat --no-stat
                        --committer-date-is-author-date --ignore-date
                        --ignore-whitespace --whitespace=
+                       --autosquash
                        "
 
                return
@@ -1378,6 +1631,18 @@ _git_rebase ()
        __gitcomp "$(__git_refs)"
 }
 
+_git_reflog ()
+{
+       local subcommands="show delete expire"
+       local subcommand="$(__git_find_on_cmdline "$subcommands")"
+
+       if [ -z "$subcommand" ]; then
+               __gitcomp "$subcommands"
+       else
+               __gitcomp "$(__git_refs)"
+       fi
+}
+
 __git_send_email_confirm_options="always never auto cc compose"
 __git_send_email_suppresscc_options="author self cc bodycc sob cccmd body all"
 
@@ -1418,6 +1683,11 @@ _git_send_email ()
        COMPREPLY=()
 }
 
+_git_stage ()
+{
+       _git_add
+}
+
 __git_config_get_set_variables ()
 {
        local prevword word config_file= c=$COMP_CWORD
@@ -1605,30 +1875,50 @@ _git_config ()
                ;;
        esac
        __gitcomp "
-               add.ignore-errors
+               add.ignoreErrors
+               advice.commitBeforeMerge
+               advice.detachedHead
+               advice.implicitIdentity
+               advice.pushNonFastForward
+               advice.resolveConflict
+               advice.statusHints
                alias.
+               am.keepcr
                apply.ignorewhitespace
                apply.whitespace
                branch.autosetupmerge
                branch.autosetuprebase
+               browser.
                clean.requireForce
                color.branch
                color.branch.current
                color.branch.local
                color.branch.plain
                color.branch.remote
+               color.decorate.HEAD
+               color.decorate.branch
+               color.decorate.remoteBranch
+               color.decorate.stash
+               color.decorate.tag
                color.diff
                color.diff.commit
                color.diff.frag
+               color.diff.func
                color.diff.meta
                color.diff.new
                color.diff.old
                color.diff.plain
                color.diff.whitespace
                color.grep
-               color.grep.external
+               color.grep.context
+               color.grep.filename
+               color.grep.function
+               color.grep.linenumber
                color.grep.match
+               color.grep.selected
+               color.grep.separator
                color.interactive
+               color.interactive.error
                color.interactive.header
                color.interactive.help
                color.interactive.prompt
@@ -1642,21 +1932,29 @@ _git_config ()
                color.status.untracked
                color.status.updated
                color.ui
+               commit.status
                commit.template
+               core.abbrevguard
+               core.askpass
+               core.attributesfile
                core.autocrlf
                core.bare
+               core.bigFileThreshold
                core.compression
                core.createObject
                core.deltaBaseCacheLimit
                core.editor
+               core.eol
                core.excludesfile
                core.fileMode
                core.fsyncobjectfiles
                core.gitProxy
                core.ignoreCygwinFSTricks
                core.ignoreStat
+               core.ignorecase
                core.logAllRefUpdates
                core.loosecompression
+               core.notesRef
                core.packedGitLimit
                core.packedGitWindowSize
                core.pager
@@ -1666,6 +1964,7 @@ _git_config ()
                core.repositoryFormatVersion
                core.safecrlf
                core.sharedRepository
+               core.sparseCheckout
                core.symlinks
                core.trustctime
                core.warnAmbiguousRefs
@@ -1673,25 +1972,30 @@ _git_config ()
                core.worktree
                diff.autorefreshindex
                diff.external
+               diff.ignoreSubmodules
                diff.mnemonicprefix
+               diff.noprefix
                diff.renameLimit
-               diff.renameLimit.
                diff.renames
                diff.suppressBlankEmpty
                diff.tool
                diff.wordRegex
                difftool.
                difftool.prompt
+               fetch.recurseSubmodules
                fetch.unpackLimit
                format.attach
                format.cc
                format.headers
                format.numbered
                format.pretty
+               format.signature
                format.signoff
                format.subjectprefix
                format.suffix
                format.thread
+               format.to
+               gc.
                gc.aggressiveWindow
                gc.auto
                gc.autopacklimit
@@ -1729,15 +2033,20 @@ _git_config ()
                http.lowSpeedLimit
                http.lowSpeedTime
                http.maxRequests
+               http.minSessions
                http.noEPSV
+               http.postBuffer
                http.proxy
                http.sslCAInfo
                http.sslCAPath
                http.sslCert
+               http.sslCertPasswordProtected
                http.sslKey
                http.sslVerify
+               http.useragent
                i18n.commitEncoding
                i18n.logOutputEncoding
+               imap.authMethod
                imap.folder
                imap.host
                imap.pass
@@ -1746,6 +2055,7 @@ _git_config ()
                imap.sslverify
                imap.tunnel
                imap.user
+               init.templatedir
                instaweb.browser
                instaweb.httpd
                instaweb.local
@@ -1753,19 +2063,29 @@ _git_config ()
                instaweb.port
                interactive.singlekey
                log.date
+               log.decorate
                log.showroot
                mailmap.file
                man.
                man.viewer
+               merge.
                merge.conflictstyle
                merge.log
                merge.renameLimit
+               merge.renormalize
                merge.stat
                merge.tool
                merge.verbosity
                mergetool.
                mergetool.keepBackup
+               mergetool.keepTemporaries
                mergetool.prompt
+               notes.displayRef
+               notes.rewrite.
+               notes.rewrite.amend
+               notes.rewrite.rebase
+               notes.rewriteMode
+               notes.rewriteRef
                pack.compression
                pack.deltaCacheLimit
                pack.deltaCacheSize
@@ -1776,31 +2096,42 @@ _git_config ()
                pack.window
                pack.windowMemory
                pager.
+               pretty.
                pull.octopus
                pull.twohead
                push.default
+               rebase.autosquash
                rebase.stat
+               receive.autogc
                receive.denyCurrentBranch
+               receive.denyDeleteCurrent
                receive.denyDeletes
                receive.denyNonFastForwards
                receive.fsckObjects
                receive.unpackLimit
+               receive.updateserverinfo
+               remotes.
                repack.usedeltabaseoffset
                rerere.autoupdate
                rerere.enabled
+               sendemail.
                sendemail.aliasesfile
-               sendemail.aliasesfiletype
+               sendemail.aliasfiletype
                sendemail.bcc
                sendemail.cc
                sendemail.cccmd
                sendemail.chainreplyto
                sendemail.confirm
                sendemail.envelopesender
+               sendemail.from
+               sendemail.identity
                sendemail.multiedit
                sendemail.signedoffbycc
+               sendemail.smtpdomain
                sendemail.smtpencryption
                sendemail.smtppass
                sendemail.smtpserver
+               sendemail.smtpserveroption
                sendemail.smtpserverport
                sendemail.smtpuser
                sendemail.suppresscc
@@ -1811,6 +2142,8 @@ _git_config ()
                showbranch.default
                status.relativePaths
                status.showUntrackedFiles
+               status.submodulesummary
+               submodule.
                tar.umask
                transfer.unpackLimit
                url.
@@ -1919,12 +2252,12 @@ _git_show ()
        local cur="${COMP_WORDS[COMP_CWORD]}"
        case "$cur" in
        --pretty=*)
-               __gitcomp "$__git_log_pretty_formats
+               __gitcomp "$__git_log_pretty_formats $(__git_pretty_aliases)
                        " "" "${cur##--pretty=}"
                return
                ;;
        --format=*)
-               __gitcomp "$__git_log_pretty_formats
+               __gitcomp "$__git_log_pretty_formats $(__git_pretty_aliases)
                        " "" "${cur##--format=}"
                return
                ;;
@@ -2021,7 +2354,7 @@ _git_svn ()
                init fetch clone rebase dcommit log find-rev
                set-tree commit-diff info create-ignore propget
                proplist show-ignore show-externals branch tag blame
-               migrate
+               migrate mkdirs reset gc
                "
        local subcommand="$(__git_find_on_cmdline "$subcommands")"
        if [ -z "$subcommand" ]; then
@@ -2068,7 +2401,7 @@ _git_svn ()
                        __gitcomp "--stdin $cmt_opts $fc_opts"
                        ;;
                create-ignore,--*|propget,--*|proplist,--*|show-ignore,--*|\
-               show-externals,--*)
+               show-externals,--*|mkdirs,--*)
                        __gitcomp "--revision="
                        ;;
                log,--*)
@@ -2105,6 +2438,9 @@ _git_svn ()
                                --no-auth-cache --username=
                                "
                        ;;
+               reset,--*)
+                       __gitcomp "--revision= --parent"
+                       ;;
                *)
                        COMPREPLY=()
                        ;;
@@ -2146,10 +2482,20 @@ _git_tag ()
        esac
 }
 
+_git_whatchanged ()
+{
+       _git_log
+}
+
 _git ()
 {
        local i c=1 command __git_dir
 
+       if [[ -n ${ZSH_VERSION-} ]]; then
+               emulate -L bash
+               setopt KSH_TYPESET
+       fi
+
        while [ $c -lt $COMP_CWORD ]; do
                i="${COMP_WORDS[c]}"
                case "$i" in
@@ -2182,67 +2528,23 @@ _git ()
                return
        fi
 
+       local completion_func="_git_${command//-/_}"
+       declare -f $completion_func >/dev/null && $completion_func && return
+
        local expansion=$(__git_aliased_command "$command")
-       [ "$expansion" ] && command="$expansion"
-
-       case "$command" in
-       am)          _git_am ;;
-       add)         _git_add ;;
-       apply)       _git_apply ;;
-       archive)     _git_archive ;;
-       bisect)      _git_bisect ;;
-       bundle)      _git_bundle ;;
-       branch)      _git_branch ;;
-       checkout)    _git_checkout ;;
-       cherry)      _git_cherry ;;
-       cherry-pick) _git_cherry_pick ;;
-       clean)       _git_clean ;;
-       clone)       _git_clone ;;
-       commit)      _git_commit ;;
-       config)      _git_config ;;
-       describe)    _git_describe ;;
-       diff)        _git_diff ;;
-       difftool)    _git_difftool ;;
-       fetch)       _git_fetch ;;
-       format-patch) _git_format_patch ;;
-       fsck)        _git_fsck ;;
-       gc)          _git_gc ;;
-       grep)        _git_grep ;;
-       help)        _git_help ;;
-       init)        _git_init ;;
-       log)         _git_log ;;
-       ls-files)    _git_ls_files ;;
-       ls-remote)   _git_ls_remote ;;
-       ls-tree)     _git_ls_tree ;;
-       merge)       _git_merge;;
-       mergetool)   _git_mergetool;;
-       merge-base)  _git_merge_base ;;
-       mv)          _git_mv ;;
-       name-rev)    _git_name_rev ;;
-       pull)        _git_pull ;;
-       push)        _git_push ;;
-       rebase)      _git_rebase ;;
-       remote)      _git_remote ;;
-       replace)     _git_replace ;;
-       reset)       _git_reset ;;
-       revert)      _git_revert ;;
-       rm)          _git_rm ;;
-       send-email)  _git_send_email ;;
-       shortlog)    _git_shortlog ;;
-       show)        _git_show ;;
-       show-branch) _git_show_branch ;;
-       stash)       _git_stash ;;
-       stage)       _git_add ;;
-       submodule)   _git_submodule ;;
-       svn)         _git_svn ;;
-       tag)         _git_tag ;;
-       whatchanged) _git_log ;;
-       *)           COMPREPLY=() ;;
-       esac
+       if [ -n "$expansion" ]; then
+               completion_func="_git_${expansion//-/_}"
+               declare -f $completion_func >/dev/null && $completion_func
+       fi
 }
 
 _gitk ()
 {
+       if [[ -n ${ZSH_VERSION-} ]]; then
+               emulate -L bash
+               setopt KSH_TYPESET
+       fi
+
        __git_has_doubledash && return
 
        local cur="${COMP_WORDS[COMP_CWORD]}"
@@ -2277,3 +2579,29 @@ if [ Cygwin = "$(uname -o 2>/dev/null)" ]; then
 complete -o bashdefault -o default -o nospace -F _git git.exe 2>/dev/null \
        || complete -o default -o nospace -F _git git.exe
 fi
+
+if [[ -n ${ZSH_VERSION-} ]]; then
+       shopt () {
+               local option
+               if [ $# -ne 2 ]; then
+                       echo "USAGE: $0 (-q|-s|-u) <option>" >&2
+                       return 1
+               fi
+               case "$2" in
+               nullglob)
+                       option="$2"
+                       ;;
+               *)
+                       echo "$0: invalid option: $2" >&2
+                       return 1
+               esac
+               case "$1" in
+               -q)     setopt | grep -q "$option" ;;
+               -u)     unsetopt "$option" ;;
+               -s)     setopt "$option" ;;
+               *)
+                       echo "$0: invalid flag: $1" >&2
+                       return 1
+               esac
+       }
+fi