437 lines
14 KiB
Bash
437 lines
14 KiB
Bash
# Pure
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# by Sindre Sorhus
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# https://github.com/sindresorhus/pure
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# MIT License
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# For my own and others sanity
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# git:
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# %b => current branch
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# %a => current action (rebase/merge)
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# prompt:
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# %F => color dict
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# %f => reset color
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# %~ => current path
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# %* => time
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# %n => username
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# %m => shortname host
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# %(?..) => prompt conditional - %(condition.true.false)
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# terminal codes:
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# \e7 => save cursor position
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# \e[2A => move cursor 2 lines up
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# \e[1G => go to position 1 in terminal
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# \e8 => restore cursor position
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# \e[K => clears everything after the cursor on the current line
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# \e[2K => clear everything on the current line
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# turns seconds into human readable time
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# 165392 => 1d 21h 56m 32s
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# https://github.com/sindresorhus/pretty-time-zsh
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prompt_pure_human_time_to_var() {
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local human=" " total_seconds=$1 var=$2
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local days=$(( total_seconds / 60 / 60 / 24 ))
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local hours=$(( total_seconds / 60 / 60 % 24 ))
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local minutes=$(( total_seconds / 60 % 60 ))
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local seconds=$(( total_seconds % 60 ))
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(( days > 0 )) && human+="${days}d "
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(( hours > 0 )) && human+="${hours}h "
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(( minutes > 0 )) && human+="${minutes}m "
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human+="${seconds}s"
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# store human readable time in variable as specified by caller
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typeset -g "${var}"="${human}"
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}
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# stores (into prompt_pure_cmd_exec_time) the exec time of the last command if set threshold was exceeded
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prompt_pure_check_cmd_exec_time() {
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integer elapsed
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(( elapsed = EPOCHSECONDS - ${prompt_pure_cmd_timestamp:-$EPOCHSECONDS} ))
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prompt_pure_cmd_exec_time=
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(( elapsed > ${PURE_CMD_MAX_EXEC_TIME:=5} )) && {
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prompt_pure_human_time_to_var $elapsed "prompt_pure_cmd_exec_time"
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}
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}
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prompt_pure_clear_screen() {
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# enable output to terminal
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zle -I
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# clear screen and move cursor to (0, 0)
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print -n '\e[2J\e[0;0H'
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# print preprompt
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prompt_pure_preprompt_render precmd
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}
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prompt_pure_set_title() {
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# emacs terminal does not support settings the title
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(( ${+EMACS} )) && return
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# tell the terminal we are setting the title
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print -n '\e]0;'
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# show hostname if connected through ssh
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[[ -n $SSH_CONNECTION ]] && print -Pn '(%m) '
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case $1 in
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expand-prompt)
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print -Pn $2;;
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ignore-escape)
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print -rn $2;;
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esac
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# end set title
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print -n '\a'
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}
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prompt_pure_preexec() {
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if [[ -n $prompt_pure_git_fetch_pattern ]]; then
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# detect when git is performing pull/fetch (including git aliases).
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if [[ $2 =~ (git|hub)\ (.*\ )?($prompt_pure_git_fetch_pattern)(\ .*)?$ ]]; then
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# we must flush the async jobs to cancel our git fetch in order
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# to avoid conflicts with the user issued pull / fetch.
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async_flush_jobs 'prompt_pure'
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fi
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fi
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prompt_pure_cmd_timestamp=$EPOCHSECONDS
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# shows the current dir and executed command in the title while a process is active
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prompt_pure_set_title 'ignore-escape' "$PWD:t: $2"
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}
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# string length ignoring ansi escapes
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prompt_pure_string_length_to_var() {
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local str=$1 var=$2 length
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# perform expansion on str and check length
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length=$(( ${#${(S%%)str//(\%([KF1]|)\{*\}|\%[Bbkf])}} ))
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# store string length in variable as specified by caller
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typeset -g "${var}"="${length}"
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}
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prompt_pure_preprompt_render() {
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# store the current prompt_subst setting so that it can be restored later
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local prompt_subst_status=$options[prompt_subst]
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# make sure prompt_subst is unset to prevent parameter expansion in preprompt
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setopt local_options no_prompt_subst
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# check that no command is currently running, the preprompt will otherwise be rendered in the wrong place
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[[ -n ${prompt_pure_cmd_timestamp+x} && "$1" != "precmd" ]] && return
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# set color for git branch/dirty status, change color if dirty checking has been delayed
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local git_color=242
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[[ -n ${prompt_pure_git_last_dirty_check_timestamp+x} ]] && git_color=red
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# construct preprompt, beginning with path
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local preprompt="%F{blue}%~%f"
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# git info
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preprompt+="%F{$git_color}${vcs_info_msg_0_}${prompt_pure_git_dirty}%f"
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# git pull/push arrows
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preprompt+="%F{cyan}${prompt_pure_git_arrows}%f"
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# username and machine if applicable
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preprompt+=$prompt_pure_username
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# execution time
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preprompt+="%F{yellow}${prompt_pure_cmd_exec_time}%f"
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# make sure prompt_pure_last_preprompt is a global array
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typeset -g -a prompt_pure_last_preprompt
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# if executing through precmd, do not perform fancy terminal editing
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if [[ "$1" == "precmd" ]]; then
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print -P "\n${preprompt}"
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else
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# only redraw if the expanded preprompt has changed
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[[ "${prompt_pure_last_preprompt[2]}" != "${(S%%)preprompt}" ]] || return
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# calculate length of preprompt and store it locally in preprompt_length
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integer preprompt_length lines
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prompt_pure_string_length_to_var "${preprompt}" "preprompt_length"
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# calculate number of preprompt lines for redraw purposes
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(( lines = ( preprompt_length - 1 ) / COLUMNS + 1 ))
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# calculate previous preprompt lines to figure out how the new preprompt should behave
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integer last_preprompt_length last_lines
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prompt_pure_string_length_to_var "${prompt_pure_last_preprompt[1]}" "last_preprompt_length"
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(( last_lines = ( last_preprompt_length - 1 ) / COLUMNS + 1 ))
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# clr_prev_preprompt erases visual artifacts from previous preprompt
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local clr_prev_preprompt
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if (( last_lines > lines )); then
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# move cursor up by last_lines, clear the line and move it down by one line
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clr_prev_preprompt="\e[${last_lines}A\e[2K\e[1B"
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while (( last_lines - lines > 1 )); do
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# clear the line and move cursor down by one
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clr_prev_preprompt+='\e[2K\e[1B'
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(( last_lines-- ))
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done
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# move cursor into correct position for preprompt update
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clr_prev_preprompt+="\e[${lines}B"
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# create more space for preprompt if new preprompt has more lines than last
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elif (( last_lines < lines )); then
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# move cursor using newlines because ansi cursor movement can't push the cursor beyond the last line
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printf $'\n'%.0s {1..$(( lines - last_lines ))}
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fi
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# disable clearing of line if last char of preprompt is last column of terminal
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local clr='\e[K'
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(( COLUMNS * lines == preprompt_length )) && clr=
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# modify previous preprompt
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print -Pn "${clr_prev_preprompt}\e[${lines}A\e[${COLUMNS}D${preprompt}${clr}\n"
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if [[ $prompt_subst_status = 'on' ]]; then
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# re-eanble prompt_subst for expansion on PS1
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setopt prompt_subst
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fi
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# redraw prompt (also resets cursor position)
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zle && zle .reset-prompt
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fi
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# store both unexpanded and expanded preprompt for comparison
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prompt_pure_last_preprompt=("$preprompt" "${(S%%)preprompt}")
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}
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prompt_pure_precmd() {
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# check exec time and store it in a variable
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prompt_pure_check_cmd_exec_time
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# by making sure that prompt_pure_cmd_timestamp is defined here the async functions are prevented from interfering
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# with the initial preprompt rendering
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prompt_pure_cmd_timestamp=
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# shows the full path in the title
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prompt_pure_set_title 'expand-prompt' '%~'
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# get vcs info
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vcs_info
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# preform async git dirty check and fetch
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prompt_pure_async_tasks
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# print the preprompt
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prompt_pure_preprompt_render "precmd"
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# remove the prompt_pure_cmd_timestamp, indicating that precmd has completed
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unset prompt_pure_cmd_timestamp
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}
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prompt_pure_async_git_aliases() {
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setopt localoptions noshwordsplit
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local dir=$1
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local -a gitalias pullalias
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# we enter repo to get local aliases as well.
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builtin cd -q $dir
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# list all aliases and split on newline.
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gitalias=(${(@f)"$(command git config --get-regexp "^alias\.")"})
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for line in $gitalias; do
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parts=(${(@)=line}) # split line on spaces
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aliasname=${parts[1]#alias.} # grab the name (alias.[name])
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shift parts # remove aliasname
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# check alias for pull or fetch (must be exact match).
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if [[ $parts =~ ^(.*\ )?(pull|fetch)(\ .*)?$ ]]; then
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pullalias+=($aliasname)
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fi
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done
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print -- ${(j:|:)pullalias} # join on pipe (for use in regex).
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}
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# fastest possible way to check if repo is dirty
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prompt_pure_async_git_dirty() {
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setopt localoptions noshwordsplit
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local untracked_dirty=$1 dir=$2
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# use cd -q to avoid side effects of changing directory, e.g. chpwd hooks
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builtin cd -q $dir
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if [[ $untracked_dirty = 0 ]]; then
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command git diff --no-ext-diff --quiet --exit-code
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else
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test -z "$(command git status --porcelain --ignore-submodules -unormal)"
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fi
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return $?
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}
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prompt_pure_async_git_fetch() {
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setopt localoptions noshwordsplit
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# use cd -q to avoid side effects of changing directory, e.g. chpwd hooks
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builtin cd -q $1
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# set GIT_TERMINAL_PROMPT=0 to disable auth prompting for git fetch (git 2.3+)
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export GIT_TERMINAL_PROMPT=0
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# set ssh BachMode to disable all interactive ssh password prompting
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export GIT_SSH_COMMAND=${GIT_SSH_COMMAND:-"ssh -o BatchMode=yes"}
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command git -c gc.auto=0 fetch &>/dev/null || return 1
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# check arrow status after a successful git fetch
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prompt_pure_async_git_arrows $1
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}
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prompt_pure_async_git_arrows() {
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setopt localoptions noshwordsplit
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builtin cd -q $1
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command git rev-list --left-right --count HEAD...@'{u}'
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}
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prompt_pure_async_tasks() {
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setopt localoptions noshwordsplit
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# initialize async worker
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((!${prompt_pure_async_init:-0})) && {
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async_start_worker "prompt_pure" -u -n
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async_register_callback "prompt_pure" prompt_pure_async_callback
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prompt_pure_async_init=1
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}
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# store working_tree without the "x" prefix
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local working_tree="${vcs_info_msg_1_#x}"
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# check if the working tree changed (prompt_pure_current_working_tree is prefixed by "x")
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if [[ ${prompt_pure_current_working_tree#x} != $working_tree ]]; then
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# stop any running async jobs
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async_flush_jobs "prompt_pure"
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# reset git preprompt variables, switching working tree
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unset prompt_pure_git_dirty
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unset prompt_pure_git_last_dirty_check_timestamp
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unset prompt_pure_git_fetch_pattern
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prompt_pure_git_arrows=
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# set the new working tree and prefix with "x" to prevent the creation of a named path by AUTO_NAME_DIRS
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prompt_pure_current_working_tree="x${working_tree}"
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fi
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# only perform tasks inside git working tree
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[[ -n $working_tree ]] || return
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if [[ -z $prompt_pure_git_fetch_pattern ]]; then
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# we set the pattern here to avoid redoing the pattern check until the
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# working three has changed. pull and fetch are always valid patterns.
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prompt_pure_git_fetch_pattern="pull|fetch"
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async_job "prompt_pure" prompt_pure_async_git_aliases $working_tree
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fi
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async_job "prompt_pure" prompt_pure_async_git_arrows $working_tree
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# do not preform git fetch if it is disabled or working_tree == HOME
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if (( ${PURE_GIT_PULL:-1} )) && [[ $working_tree != $HOME ]]; then
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# tell worker to do a git fetch
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async_job "prompt_pure" prompt_pure_async_git_fetch $working_tree
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fi
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# if dirty checking is sufficiently fast, tell worker to check it again, or wait for timeout
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integer time_since_last_dirty_check=$(( EPOCHSECONDS - ${prompt_pure_git_last_dirty_check_timestamp:-0} ))
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if (( time_since_last_dirty_check > ${PURE_GIT_DELAY_DIRTY_CHECK:-1800} )); then
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unset prompt_pure_git_last_dirty_check_timestamp
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# check check if there is anything to pull
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async_job "prompt_pure" prompt_pure_async_git_dirty ${PURE_GIT_UNTRACKED_DIRTY:-1} $working_tree
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fi
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}
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prompt_pure_check_git_arrows() {
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setopt localoptions noshwordsplit
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local arrows left=${1:-0} right=${2:-0}
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(( right > 0 )) && arrows+=${PURE_GIT_DOWN_ARROW:-⇣}
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(( left > 0 )) && arrows+=${PURE_GIT_UP_ARROW:-⇡}
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[[ -n $arrows ]] || return
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typeset -g REPLY=" $arrows"
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}
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prompt_pure_async_callback() {
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setopt localoptions noshwordsplit
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local job=$1 code=$2 output=$3 exec_time=$4
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case $job in
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prompt_pure_async_git_aliases)
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if [[ -n $output ]]; then
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# append custom git aliases to the predefined ones.
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prompt_pure_git_fetch_pattern+="|$output"
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fi
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;;
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prompt_pure_async_git_dirty)
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local prev_dirty=$prompt_pure_git_dirty
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if (( code == 0 )); then
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prompt_pure_git_dirty=
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else
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prompt_pure_git_dirty="*"
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fi
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[[ $prev_dirty != $prompt_pure_git_dirty ]] && prompt_pure_preprompt_render
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# When prompt_pure_git_last_dirty_check_timestamp is set, the git info is displayed in a different color.
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# To distinguish between a "fresh" and a "cached" result, the preprompt is rendered before setting this
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# variable. Thus, only upon next rendering of the preprompt will the result appear in a different color.
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(( $exec_time > 2 )) && prompt_pure_git_last_dirty_check_timestamp=$EPOCHSECONDS
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;;
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prompt_pure_async_git_fetch|prompt_pure_async_git_arrows)
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# prompt_pure_async_git_fetch executes prompt_pure_async_git_arrows
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# after a successful fetch.
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if (( code == 0 )); then
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local REPLY
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prompt_pure_check_git_arrows ${(ps:\t:)output}
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if [[ $prompt_pure_git_arrows != $REPLY ]]; then
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prompt_pure_git_arrows=$REPLY
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prompt_pure_preprompt_render
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fi
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fi
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;;
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esac
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}
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prompt_pure_setup() {
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# prevent percentage showing up
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# if output doesn't end with a newline
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export PROMPT_EOL_MARK=''
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prompt_opts=(subst percent)
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# borrowed from promptinit, sets the prompt options in case pure was not
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# initialized via promptinit.
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setopt noprompt{bang,cr,percent,subst} "prompt${^prompt_opts[@]}"
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zmodload zsh/datetime
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zmodload zsh/zle
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zmodload zsh/parameter
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autoload -Uz add-zsh-hook
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autoload -Uz vcs_info
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autoload -Uz async && async
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add-zsh-hook precmd prompt_pure_precmd
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add-zsh-hook preexec prompt_pure_preexec
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zstyle ':vcs_info:*' enable git
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zstyle ':vcs_info:*' use-simple true
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# only export two msg variables from vcs_info
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zstyle ':vcs_info:*' max-exports 2
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# vcs_info_msg_0_ = ' %b' (for branch)
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# vcs_info_msg_1_ = 'x%R' git top level (%R), x-prefix prevents creation of a named path (AUTO_NAME_DIRS)
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zstyle ':vcs_info:git*' formats ' %b' 'x%R'
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zstyle ':vcs_info:git*' actionformats ' %b|%a' 'x%R'
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# if the user has not registered a custom zle widget for clear-screen,
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# override the builtin one so that the preprompt is displayed correctly when
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# ^L is issued.
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if [[ $widgets[clear-screen] == 'builtin' ]]; then
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zle -N clear-screen prompt_pure_clear_screen
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fi
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# show username@host if logged in through SSH
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[[ "$SSH_CONNECTION" != '' ]] && prompt_pure_username=' %F{242}%n@%m%f'
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# show username@host if root, with username in white
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[[ $UID -eq 0 ]] && prompt_pure_username=' %F{white}%n%f%F{242}@%m%f'
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# prompt turns red if the previous command didn't exit with 0
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PROMPT='%(?.%F{magenta}.%F{red})${PURE_PROMPT_SYMBOL:-❯}%f '
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}
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prompt_pure_setup "$@"
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