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[[ -o interactive ]] || return
zmodload zsh/datetime || return
# Retrives status of a git repo from a directory under its working tree.
#
# -d STR Directory to query. Defaults to $PWD. Must be absolute.
# -c STR Callback function to call once the results are available. Called only after
# gitstatus_query returns 0 with VCS_STATUS_RESULT=tout.
# -t FLOAT Timeout in seconds. Will block for at most this long. If no results are
# available by then: if -c isn't specified, will return 1; otherwise will set
# VCS_STATUS_RESULT=tout and return 0.
#
# On success sets VCS_STATUS_RESULT to one of the following values:
#
# tout Timed out waiting for data; will call the user-specified callback later.
# norepo-sync The directory isn't a git repo.
# ok-sync The directory is a git repo.
#
# When the callback is called VCS_STATUS_RESULT s set to one of the following values:
#
# norepo-async The directory isn't a git repo.
# ok-async The directory is a git repo.
#
# If VCS_STATUS_RESULT is ok-sync or ok-async, additional variables are set:
#
# VCS_STATUS_LOCAL_BRANCH Local branch name. Not empty.
# VCS_STATUS_REMOTE_BRANCH Upstream branch name. Can be empty.
# VCS_STATUS_REMOTE_URL Remote URL. Can be empty.
# VCS_STATUS_ACTION Repository state, A.K.A. action. Can be empty.
# VCS_STATUS_HAS_STAGED 1 if there are staged changes, 0 otherwise.
# VCS_STATUS_HAS_UNSTAGED 1 if there are unstaged changes, 0 if there aren't, -1 if unknown.
# VCS_STATUS_HAS_UNTRACKED 1 if there are untracked files, 0 if there aren't, -1 if unknown.
# VCS_STATUS_COMMITS_AHEAD Number of commits the current branch is ahead of upstream.
# Non-negative integer.
# VCS_STATUS_COMMITS_BEHIND Number of commits the current branch is behind upstream. Non-negative
# integer.
# VCS_STATUS_STASHES Number of stashes. Non-negative integer.
# VCS_STATUS_WORKDIR Git repo working directory. Not empty.
# VCS_STATUS_ALL All of the above in an array. The order of elements is unspecified.
# More elements can be added in the future.
#
# The point of reporting -1 as unstaged and untracked is to allow the command to skip scanning
# files in large repos. See -m flag of gitstatus_start.
#
# !!!!! WARNING: CONCURRENT CALLS WITH THE SAME NAME ARE NOT ALLOWED !!!!!
#
# It's illegal to call `gitstatus_query NAME` if `gitstatus_query NAME` is running concurrently in
# the same interactive shell or its child, or if the callback for the last timed out request hasn't
# fired yet. If you need to issue concurrent requests, use different NAME arguments.
function gitstatus_query() {
emulate -L zsh
setopt err_return no_unset
local opt
local dir=$PWD
local callback=''
local -F timeout=-1
while true; do
getopts "d:c:t:" opt || break
case $opt in
d) dir=$OPTARG;;
c) callback=$OPTARG;;
t) timeout=$OPTARG;;
?) return 1;;
done) break;;
esac
done
(( OPTIND == ARGC )) || { echo "usage: gitstatus_query [OPTION]... NAME" >&2; return 1 }
local name=${*[$OPTIND]}
[[ -v GITSTATUS_DAEMON_PID_${name} ]]
local -i req_fd
local req_fd_var=_GITSTATUS_REQ_FD_${name}
local client_pid_var=_GITSTATUS_CLIENT_PID_${name}
[[ ${(P)client_pid_var} == $$ ]] && {
req_fd=${(P)req_fd_var}
} || {
local req_fifo_var=_GITSTATUS_REQ_FIFO_${name}
local resp_fifo_var=_GITSTATUS_RESP_FIFO_${name}
local resp_fd_var=_GITSTATUS_RESP_FD_${name}
local -i resp_fd
exec {req_fd}<>${(P)req_fifo_var}
exec {resp_fd}<>${(P)resp_fifo_var}
typeset -g $client_pid_var=$$
typeset -g $req_fd_var=$req_fd
typeset -g $resp_fd_var=$resp_fd
typeset -giH $client_pid_var=$client_pid
typeset -gfH _gitstatus_process_response_${name}() {
_gitstatus_process_response ${0#_gitstatus_process_response_} 0 ''
}
zle -F $resp_fd _gitstatus_process_response_${name}
}
local -r req_id="$EPOCHREALTIME"
echo -nE "${req_id} ${callback}"$'\x1f'"${dir}"$'\x1e' >&$req_fd
while true; do
_gitstatus_process_response $name $timeout $req_id
[[ $VCS_STATUS_RESULT == *-async ]] || break
done
}
typeset -fH _gitstatus_process_response() {
emulate -L zsh
setopt err_return no_unset
local name=$1
local -F timeout=$2
local req_id=$3
local resp_fd_var=_GITSTATUS_RESP_FD_${name}
typeset -ga VCS_STATUS_ALL
typeset -g VCS_STATUS_RESULT
(( timeout >= 0 )) && local -a t=(-t $timeout) || local -a t=()
IFS=$'\x1f' read -rd $'\x1e' -u ${(P)resp_fd_var} $t -A VCS_STATUS_ALL || {
VCS_STATUS_RESULT=tout
unset VCS_STATUS_ALL
return
}
local -a header=("${(@Q)${(z)VCS_STATUS_ALL[1]}}")
[[ ${header[1]} == $req_id ]] && local -i ours=1 || local -i ours=0
shift header
[[ ${VCS_STATUS_ALL[2]} == 1 ]] && {
shift 2 VCS_STATUS_ALL
(( ours )) && VCS_STATUS_RESULT=ok-sync || VCS_STATUS_RESULT=ok-async
typeset -g VCS_STATUS_LOCAL_BRANCH="${VCS_STATUS_ALL[1]}"
typeset -g VCS_STATUS_REMOTE_BRANCH="${VCS_STATUS_ALL[2]}"
typeset -g VCS_STATUS_REMOTE_URL="${VCS_STATUS_ALL[3]}"
typeset -g VCS_STATUS_ACTION="${VCS_STATUS_ALL[4]}"
typeset -gi VCS_STATUS_HAS_STAGED="${VCS_STATUS_ALL[5]}"
typeset -gi VCS_STATUS_HAS_UNSTAGED="${VCS_STATUS_ALL[6]}"
typeset -gi VCS_STATUS_HAS_UNTRACKED="${VCS_STATUS_ALL[7]}"
typeset -gi VCS_STATUS_COMMITS_AHEAD="${VCS_STATUS_ALL[8]}"
typeset -gi VCS_STATUS_COMMITS_BEHIND="${VCS_STATUS_ALL[9]}"
typeset -gi VCS_STATUS_STASHES="${VCS_STATUS_ALL[10]}"
typeset -g VCS_STATUS_WORKDIR="${VCS_STATUS_ALL[11]}"
} || {
(( ours )) && VCS_STATUS_RESULT=norepo-sync || VCS_STATUS_RESULT=norepo-async
unset VCS_STATUS_ALL
unset VCS_STATUS_LOCAL_BRANCH
unset VCS_STATUS_REMOTE_BRANCH
unset VCS_STATUS_REMOTE_URL
unset VCS_STATUS_ACTION
unset VCS_STATUS_HAS_STAGED
unset VCS_STATUS_HAS_UNSTAGED
unset VCS_STATUS_HAS_UNTRACKED
unset VCS_STATUS_COMMITS_AHEAD
unset VCS_STATUS_COMMITS_BEHIND
unset VCS_STATUS_STASHES
unset VCS_STATUS_WORKDIR
}
(( ! ours )) && (( #header )) && emulate -L zsh && "${header[@]}" || true
}
# Usage: gitstatus_start [OPTION]... NAME
#
# -t FLOAT Fail the self-check on initialization if not getting a response from gitstatusd for
# this this many seconds. Defaults to 5.
# -m INT Report -1 unstaged and untracked if there are more than this many files in the index.
# Negative value means infinity. Defaults to -1.
function gitstatus_start() {
emulate -L zsh
setopt err_return no_unset
local opt
local -F timeout=5
local -i max_dirty=-1
while true; do
getopts "t:m:" opt || break
case $opt in
t) timeout=$OPTARG;;
m) max_dirty=$OPTARG;;
?) return 1;;
done) break;;
esac
done
(( timeout > 0 )) || { echo "invalid -t: $timeout" >&2; return 1 }
(( OPTIND == ARGC )) || { echo "usage: gitstatus_start [OPTION]... NAME" >&2; return 1 }
local name=${*[$OPTIND]}
[[ ! -v GITSTATUS_DAEMON_PID_${name} ]] || return 0
function gitstatus_arch() {
local kernel && kernel=$(uname -s) && [[ -n $kernel ]]
local arch && arch=$(uname -m) && [[ -n $arch ]]
echo -E "${kernel:l}-${arch:l}"
}
local daemon && daemon=${GITSTATUS_DAEMON:-${${(%):-%x}:A:h}/bin/gitstatusd-$(gitstatus_arch)}
[[ -f $daemon ]] || { echo "file not found: $daemon" >&2 && return 1 }
local req_fifo resp_fifo log
local -i req_fd resp_fd daemon_pid
function start() {
req_fifo=$(mktemp -u "${TMPDIR:-/tmp}"/gitstatus.$$.pipe.req.XXXXXXXXXX)
resp_fifo=$(mktemp -u "${TMPDIR:-/tmp}"/gitstatus.$$.pipe.resp.XXXXXXXXXX)
mkfifo $req_fifo
mkfifo $resp_fifo
exec {req_fd}<>$req_fifo
exec {resp_fd}<>$resp_fifo
typeset -gfH _gitstatus_process_response_${name}() {
_gitstatus_process_response ${0#_gitstatus_process_response_} 0 ''
}
zle -F $resp_fd _gitstatus_process_response_${name}
log=$(mktemp "${TMPDIR:-/tmp}"/gitstatus.$$.log.XXXXXXXXXX)
(
nice -n -20 $daemon --dirty-max-index-size=$max_dirty --parent-pid=$$ \
<&$req_fd >&$resp_fd 2>$log || true
echo -nE $'bye\x1f0\x1e' >&$resp_fd || true
rm -f $req_fifo $resp_fifo
) &!
daemon_pid=$!
local reply
echo -nE $'hello\x1f\x1e' >&$req_fd
IFS='' read -r -d $'\x1e' -u $resp_fd -t $timeout reply
[[ $reply == $'hello\x1f0' ]]
}
start && {
typeset -g GITSTATUS_DAEMON_LOG_${name}=$log
typeset -gi GITSTATUS_DAEMON_PID_${name}=$daemon_pid
typeset -gH _GITSTATUS_REQ_FIFO_${name}=$req_fifo
typeset -gH _GITSTATUS_RESP_FIFO_${name}=$resp_fifo
typeset -giH _GITSTATUS_REQ_FD_${name}=$req_fd
typeset -giH _GITSTATUS_RESP_FD_${name}=$resp_fd
typeset -giH _GITSTATUS_CLIENT_PID_${name}=$$
} || {
echo "gitstatus failed to initialize" >&2
[[ -n $daemon_pid ]] && kill $daemon_pid &>/dev/null || true
[[ -n $req_fd ]] && exec {req_fd}>&- || true
[[ -n $resp_fd ]] && { zle -F $resp_fd || true } && { exec {resp_fd}>&- || true}
rm -f $req_fifo $resp_fifo
return 1
}
}
# Usage: gitstatus_check NAME.
#
# Returns 0 if and only if `gitstatus_start NAME` has succeeded previously.
# If it returns non-zero, gitstatus_query NAME is guaranteed to return non-zero.
function gitstatus_check() {
local name=$1
[[ -v GITSTATUS_DAEMON_PID_${name} ]]
}
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