├── .gitignore ├── LICENSE ├── README.md └── gitprompt.pl /.gitignore: -------------------------------------------------------------------------------- 1 | *.swp 2 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | `gitprompt` is an efficient, highly configurable prompt for Git status information in command-line shells. 2 | 3 | To use it, attach the associated script, `gitprompt.pl`, to your shell's mechanism for running a command before the prompt is displayed (in `bash`, this is `PROMPT_COMMAND`), storing its result in `PS1` (or whatever your shell's prompt variable). For example, in `bash`, you could put this in your `.bashrc` or `.bash_profile`: 4 | 5 | ``` 6 | # if you already have a PROMPT_COMMAND 7 | export PROMPT_COMMAND=$PROMPT_COMMAND';export PS1=$(gitprompt.pl)' 8 | 9 | # if you don't already have a PROMPT_COMMAND 10 | export PROMPT_COMMAND='export PS1=$(gitprompt.pl)' 11 | ``` 12 | 13 | (The above assumes that `gitprompt.pl` is in your `PATH`; if not, specify its path explicitly.) 14 | 15 | You also need to define the template which will be filled in with your Git status information. This template goes in the `PS0` environment variable: 16 | 17 | ``` 18 | # ugly! start with a nice-looking one from further below! 19 | export PS0='\u@\h %{[%b; %c%u%f] %}\$ ' 20 | ``` 21 | 22 | This tells `gitprompt.pl` to return (for use in `PS1`) a regular `bash` prompt like `\u@\h $ ` normally, but, when in a Git repo (`%{ ... %}`), to also include the branchname (`%b`) and flags for when files are to be committed (`%c`), updated but not added for commit (`%u`), or untracked (`%f`), all wrapped in `[...]`. There are many such flags and many ways to combine and configure them in a way that is useful to you and your workflow. By default, the above flags just return their letter (`c`, `u`, `f`), but this is completely configurable. For example: 23 | 24 | ``` 25 | user@host [master; ] $ touch new-file 26 | user@host [master; f] $ echo "a" >> file1 27 | user@host [master; uf] $ echo "b" >> file2; git add file2 28 | user@host [master; cuf] $ git status 29 | # On branch master 30 | # Changes to be committed: 31 | # modified: file2 32 | # 33 | # Changed but not updated: 34 | # modified: file1 35 | # 36 | # Untracked files: 37 | # new-file 38 | ``` 39 | 40 | The `gitprompt.pl` script itself also takes extra arguments that control how it returns its output. These are all passed as `name=value` arguments to the script itself, usually specified within the invocation in `PROMPT_COMMAND`. For example, if you like counts for each type of flag and symbols instead of letters, you could do: 41 | 42 | ``` 43 | export PROMPT_COMMAND='export PS1=$(gitprompt.pl c=\+ u=\~ f=\* statuscount=1)' 44 | ``` 45 | 46 | Now, the above example turns into: 47 | 48 | ``` 49 | user@host [master; +1~1*1] $ 50 | ``` 51 | 52 | Here's a more interesting example which also removes the semicolon when the repo is clean: 53 | 54 | ``` 55 | user@host [master; +1~1*1] $ git reset --hard; rm new-file 56 | user@host [master; ] $ export PROMPT_COMMAND='export PS1=$(gitprompt.pl c=\+ u=\~ f=\* statuscount=1 keepempty=0)' 57 | user@host [master; ] $ export PS0='\u@\h %{[%b%}%{; %c%u%f%}%{%g] %}\$ ' 58 | user@host [master] $ touch new-file 59 | user@host [master; *1] $ 60 | ``` 61 | 62 | ## Template Format Codes 63 | These can be placed in `PS0` or the option definitions (for options which take 64 | strings to output). In `PS0`, bash escapes should be preferred when available. 65 | 66 | ``` 67 | %b - current branch name 68 | %i - current commit id 69 | %c - to-be-committed flag 70 | %u - touched-files flag 71 | %f - untracked-files flag 72 | %A - merge commits ahead flag 73 | %B - merge commits behind flag 74 | %F - can-fast-forward flag 75 | %t - terrible tragedy flag 76 | %g - is-git-repo flag 77 | %e - ascii escape 78 | %[ - literal '\[' to mark the start of nonprinting characters for bash 79 | %] - literal '\]' to mark the end of nonprinting characters for bash 80 | %% - literal '%' 81 | %{ - begin conditionally printed block, only shown if a nonliteral expands within 82 | %} - end conditionally printed block 83 | ``` 84 | 85 | ## Command-line options: 86 | These are specified as arguments to the call to `gitprompt.pl` in the form 87 | `name=value`, such as `$(gitprompt.pl c=\+ u=\~ f=\* statuscount=1)`. 88 | 89 | ``` 90 | c - string to use for %c; defaults to 'c' 91 | u - string to use for %u; defaults to 'u' 92 | f - string to use for %f; defaults to 'f' 93 | A - string to use for %A; defaults to 'A' 94 | B - string to use for %B; defaults to 'B' 95 | F - string to use for %F; defaults to 'F' 96 | t - string to use for %t after a timeout; defaults to '?' 97 | l - string to use for %t when the repo is locked; defaults to '?~' 98 | n - string to use for %t when no data could be collected, such as 99 | if run from within a .git directory; defaults to '??' 100 | g - string to use for %g; defaults to the empty string (see %{) 101 | statuscount - boolean; whether to suffix %c/%u with counts ("c4u8") 102 | keepempty - boolean; whether to always keep conditionals which only 103 | contain empty %x codes (but %g is always kept); default 1 104 | ``` 105 | 106 | ## Better examples 107 | A full prompt with symbols for statuses: 108 | ``` 109 | export PS0='\[\e[0;31m\][\t]\[\e[1m\][\h]\[\e[0;1m\][\w]\[\e[30;1m\]%{[%b\[\e[0m\]%c%u%f%t\[\e[30;1m\]]%}%{[\[\e[0m\]%B%A%F\[\e[30;1m\]]%}\[\e[0m\]\u\$ ' 110 | export PROMPT_COMMAND=$PROMPT_COMMAND';export PS1=$(gitprompt.pl c=\+ u=\~ f=\* A=/ B=\\\\ F=\ \>\> statuscount=1)' 111 | ``` 112 | 113 | Change branchname color: 114 | ``` 115 | export PS0='%{[\[%f%c%u%t\]%b\[\e[0m\]]%}\[\e[0m\]\u\$ ' 116 | export PROMPT_COMMAND=$PROMPT_COMMAND';export PS1=$(gitprompt.pl c=%e[32m u=%e[31m f=%e[35m t=%e[30\;1m)' 117 | ``` 118 | 119 | Colored counts instead of flags: 120 | ``` 121 | export PS0='%{\[\e[0;36m\](\[\e[1;36m\]%b\[\e[0;36m\])[%c%u%f%t\[\e[0;36m\]]%}\[\e[0m\]$ ' 122 | export PROMPT_COMMAND=$PROMPT_COMMAND';export PS1=$(gitprompt.pl statuscount=1 u=%[%e[31m%] c=%[%e[32m%] f=%[%e[1\;30m%])' 123 | ``` 124 | 125 | A simple style that used to be popular at Synacor: 126 | ``` 127 | export PS0='[\t]\[\e[36m\]%{(%b)\[\e[0;1m\][%c%u%f%t]%}\[\e[0m\]\u\$ ' 128 | export PROMPT_COMMAND=$PROMPT_COMMAND';export PS1=$(gitprompt.pl statuscount=1)' 129 | ``` 130 | 131 | ## Notes 132 | If your .bashrc doesn't already define a $PROMPT_COMMAND (this is common 133 | in /etc/bashrc, which is often sourced by default), use this 134 | PROMPT_COMMAND line instead: 135 | ``` 136 | export PROMPT_COMMAND='export PS1=$(gitprompt.pl ...)' 137 | ``` 138 | 139 | A good rule of thumb is to use real bash escapes (backslash flavor) inside 140 | the definition for `PS0` (where escaping is normal) and `gitprompt.pl` escapes 141 | (percent flavor) inside the arguments to `gitprompt.pl` (where escaping is 142 | troublesome). 143 | 144 | To prevent your prompt from getting garbled, wrap all nonprinting sequences 145 | (like color codes) in `\[...\]` or `%[...%]`. This tells Bash not to count 146 | those characters when determining the length of your prompt and prevents it 147 | from becoming confused. 148 | 149 | For... (assuming `%c` is whatever flags you care about) 150 | - brackets no matter what, use `[%c]` 151 | - brackets only in a git repo, regardless of status, use `%{[%c%g]%}` 152 | - brackets only when a flag is set, use `%{[%c]%}` 153 | -------------------------------------------------------------------------------- /gitprompt.pl: -------------------------------------------------------------------------------- 1 | #!/usr/bin/perl -w 2 | 3 | eval 'exec /usr/bin/perl -w -S $0 ${1+"$@"}' 4 | if 0; # not running under some shell 5 | use strict; 6 | 7 | =ignore 8 | Copyright 2013 Synacor, Inc. 9 | 10 | This program is free software: you can redistribute it and/or modify 11 | it under the terms of the GNU General Public License as published by 12 | the Free Software Foundation, either version 3 of the License, or 13 | (at your option) any later version. 14 | 15 | This program is distributed in the hope that it will be useful, 16 | but WITHOUT ANY WARRANTY; without even the implied warranty of 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 | GNU General Public License for more details. 19 | 20 | You should have received a copy of the GNU General Public License 21 | along with this program. If not, see . 22 | =cut 23 | 24 | use IO::Handle; 25 | use IPC::Open3; 26 | use Time::HiRes qw(time); 27 | 28 | ### prechecks ### 29 | my $ps0 = $ENV{PS0}; 30 | unless ($ps0) { 31 | print "!define PS0!> "; 32 | exit 1; 33 | } 34 | 35 | ### global definitions ### 36 | my %formatliteral = ( 37 | e => "\e", 38 | '%' => '%', 39 | '[' => "\\[", 40 | ']' => "\\]", 41 | ); 42 | my %formatcondkeep = ( 43 | g => 1, 44 | ); 45 | 46 | ### definitions ### 47 | my %opt = ( 48 | c => 'c', 49 | u => 'u', 50 | f => 'f', 51 | A => 'A', 52 | B => 'B', 53 | F => 'F', 54 | t => '?', 55 | l => '?~', 56 | n => '??', 57 | g => '', 58 | statuscount => 0, 59 | keepempty => 1, 60 | ); 61 | 62 | ### read options ### 63 | if (@ARGV) { 64 | foreach (@ARGV) { 65 | return {error=>"invalid parameter $_"} unless /^(\w+)\=(.*?)$/; 66 | my ($key,$val) = ($1,$2); 67 | $val =~ s/\%(.)/exists $formatliteral{$1} ? $formatliteral{$1} : ''/ge; 68 | $opt{$key} = $val; 69 | } 70 | } 71 | 72 | my %formatvalue = %{gitdata()}; 73 | my $output = ""; 74 | my @ps0 = split(/\%\{(.*?)\%\}/, $ps0); 75 | my $conditional = 0; 76 | foreach my $part (@ps0) { 77 | if ($conditional) { 78 | my $keep = 0; 79 | my $formatter = sub { 80 | my ($code) = @_; 81 | if (exists $formatliteral{$code}) { 82 | return $formatliteral{$code}; 83 | } elsif (exists $formatvalue{$code} && ($opt{keepempty} || length $formatvalue{$code} || $formatcondkeep{$code})) { 84 | $keep = 1; 85 | return $formatvalue{$code}; 86 | } else { 87 | return ''; 88 | } 89 | }; 90 | $part =~ s/\%(.)/$formatter->($1)/ge; 91 | $output .= $part if $keep; 92 | } else { 93 | $part =~ s/\%(.)/exists $formatliteral{$1} ? $formatliteral{$1} : exists $formatvalue{$1} ? $formatvalue{$1} : ''/ge; 94 | $output .= $part; 95 | } 96 | $conditional = !$conditional; 97 | } 98 | $output = "\\[\e[0;30;41m\\]! $formatvalue{error} !\\[\e[0m\\]$output" if exists $formatvalue{error}; 99 | print $output; 100 | 101 | sub gitdata { 102 | ### prechecks ### 103 | chomp(my $headref = `git symbolic-ref HEAD 2>&1`); 104 | return {} if $headref =~ /fatal: Not a git repository|fatal: Unable to read current working directory/i; 105 | 106 | ### collect branch data ### 107 | chomp(my $commitid = `git rev-parse --short HEAD 2>&1`); 108 | my $branch = $commitid; #fallback value 109 | if ($headref =~ /fatal: ref HEAD is not a symbolic ref/i) { 110 | # find gitdir 111 | chomp(my $gitdir = `git rev-parse --git-dir`); 112 | 113 | # parse HEAD log 114 | open(HEADLOG, "$gitdir/logs/HEAD"); 115 | my $lastrelevant = ''; 116 | while () { 117 | $lastrelevant = $_ if /^\s*\w+\s+$branch\w+\s/; 118 | } 119 | 120 | # if the log mentions switching to the commit id, use whatever it calls it 121 | $branch = $1 if $lastrelevant =~ /\scheckout\:\s+moving\s+from\s+\S+\s+to\s+(\S+)\s*$/ || $lastrelevant =~ /\smerge\s+(\S+)\:\s+Fast\-forward\s*$/; 122 | } elsif ($headref =~ /^refs\/heads\/(.+?)\s*$/) { 123 | # normal branch 124 | $branch = $1; 125 | } else { 126 | # unexpected input 127 | $headref =~ s/[^\x20-\x7e]//g; 128 | return {error=>$headref}; 129 | } 130 | 131 | ### collect status data ### 132 | my ($statusexitcode, $statusout, @status); 133 | $SIG{CHLD} = sub { wait(); $statusexitcode = $?>>8; }; 134 | my $statuspid = open3(undef,$statusout,undef,"git status"); 135 | $statusout->blocking(0); 136 | my ($running, $waiting, $start, $valid) = (1, 1, time, 0); 137 | while ($running && $waiting) { 138 | while (<$statusout>) { 139 | push @status, $_; 140 | } 141 | 142 | $running = kill 0 => $statuspid; 143 | select undef, undef, undef, .001; #yield, actually 144 | $waiting = time < $start + 1; 145 | } 146 | 147 | ### parse status data ### 148 | my %statuscount; 149 | my %sectionmap = ( 150 | 'Changes to be committed' => 'c', 151 | 'Changed but not updated' => 'u', 152 | 'Changes not staged for commit' => 'u', 153 | 'Untracked files' => 'f', 154 | 'Unmerged paths' => 'u', 155 | ); 156 | $statuscount{$_} = 0 foreach values %sectionmap; 157 | my $can_fast_forward = ''; 158 | 159 | if (!$running) { 160 | # if it terminated, parse output 161 | my ($section); 162 | foreach (@status) { 163 | if (/^(?:\# )?(\S.+?)\:\s*$/ && exists $sectionmap{$1}) { 164 | $section = $sectionmap{$1}; 165 | } elsif ($section && /^\#?\t\S/) { 166 | $statuscount{$section}++; 167 | $valid = 1; 168 | } elsif (/^nothing to commit\b/) { 169 | $valid = 1; 170 | } elsif (/\bis (ahead|behind) .+ by (\d+) commits?(\,? and can be fast\-forwarded)?/) { 171 | $statuscount{($1 eq 'ahead') ? 'A' : 'B'} = $2; 172 | $can_fast_forward = 1 if $3; 173 | } elsif (/^(?:\# )?and have (\d+) and (\d+) different commit/) { 174 | $statuscount{A} = $1; 175 | $statuscount{B} = $2; 176 | } 177 | } 178 | } 179 | 180 | my $timeout = ''; 181 | if ($running) { 182 | # it was running when we stopped caring 183 | $timeout = $opt{t}; 184 | kill 2 => $statuspid; 185 | } elsif (!$valid) { 186 | #determine cause of failure 187 | if ($status[0] =~ /\.git\/index\.lock/) { 188 | $timeout = $opt{l}; 189 | } elsif ($status[0] =~ /must be run in a work tree/) { 190 | $timeout = $opt{n}; 191 | } else { 192 | print "\\[\e[41m\\]!! gitprompt.pl: \\`git status\' returned with exit code $statusexitcode and message:\n$status[0]\\[\e[0m\\]"; 193 | $timeout = "\\[\e[41m\\]!$statusexitcode!\\[\e[0m\\]"; 194 | } 195 | } 196 | 197 | ### produce output ### 198 | my %formatvalue = ( 199 | b => $branch, 200 | i => $commitid, 201 | t => $timeout, 202 | g => $opt{g}, 203 | ); 204 | $formatvalue{F} = $opt{F} if $can_fast_forward; 205 | foreach my $flag (keys %statuscount) { 206 | $formatvalue{$flag} = $statuscount{$flag} ? ($opt{$flag}.($opt{statuscount} ? $statuscount{$flag} : '')) : ''; 207 | } 208 | return \%formatvalue; 209 | } 210 | --------------------------------------------------------------------------------