Informative git prompt for zsh

A zsh prompt that displays information about the current git repository. In particular the branch name, difference with remote branch, number of files staged, changed, etc.

Contributing: if you want to contribute to this project, please let me know (zsh-git-prompt#15), and I'll add you to the zsh-git-prompt organization.

History

The original idea came from this blog post. It was extended with new functionality at olivierverdier/zsh-git-prompt.

Later the development continued at starcraftman/zsh-git-prompt. See the its wiki for a list of added futures.

Changes/new features:

Reorganize repository structure
Add an interface between the script that analyzes the repository and the script that formats the prompt. This makes it easier to exchange the two scripts. See Development
Added a shell-only implementation. This avoids the startup cost of Python or Haskell.
Added git-summary

Examples

The prompt may look like the following:

(master↑3|✚1): on branch master, ahead of remote by 3 commits, 1 file changed but not staged
(status|●2): on branch status, 2 files staged
(master|✚7…): on branch master, 7 files changed, some files untracked
(master|✖2✚3): on branch master, 2 conflicts, 3 files changed
(experimental↓2↑3|✔): on branch experimental; your branch has diverged by 3 commits, remote by 2 commits; the repository is otherwise clean
(:70c2952|✔): not on any branch; parent commit has hash 70c2952; the repository is otherwise clean

Here is how it could look like when you are ahead by 4 commits, behind by 5 commits, and have 1 staged files, 1 changed but unstaged file, and some untracked files, on branch dev:

Prompt Structure

By default, the general appearance of the prompt is:

(<branch><branch tracking>|<local status>)

The symbols are as follows:

Local Status Symbols

Symbol	Meaning
✔	repository clean
●n	there are `n` staged files
✖n	there are `n` unmerged files
✚n	there are `n` changed but unstaged files
…n	there are `n` untracked files
⚑n	there are `n` stashes on the repo

Branch Tracking Symbols

Symbol	Meaning
↑n	ahead of remote by `n` commits
↓n	behind remote by `n` commits
↓m↑n	branches diverged, other by `m` commits, yours by `n` commits

Branch States

Status	Meaning
master\|✔	On a branch (master), clean
:3adh57m\|✔	Checked out a hash
dev\|MERGING\|✖1	Doing a merge onto dev, 1 conflict
:h2x78q0\|REBASE 1/3\|✖2	Doing a rebase, on first of 3 commits, 2 conflicts
:bc49c7c\|BISECT 97; 6 steps\|✔	Bisecting 97 commits, roughly 6 steps left (only with `GIT_PROMPT_EXECUTABLE=shell`)

When the branch name starts with a colon :, it means it’s actually a hash, not a branch. It should be pretty clear, unless you name your branches like hashes :-)

Install

Clone this repository somewhere on your hard drive.
Source the file zshrc.sh from your ~/.zshrc config file, and configure your prompt. So, somewhere in ~/.zshrc, you should have:
```
source path/to/zshrc.sh
# an example prompt
PROMPT='%B%m%~%b$(git_super_status) %# '
```
Go in a git repository and test it!

Haskell (optional)

There is now a Haskell implementation as well, which can be four to six times faster than the Python one. The reason is not that Haskell is faster in itself (although it is), but that this implementation calls git only once. To install, do the following:

Make sure Haskell's stack is installed on your system
cd to this folder
Run stack setup to install the Haskell compiler, if it is not already there
Run stack build && stack install (don't worry, the executable is only “installed” in this folder, not on your system)
Define the variable GIT_PROMPT_EXECUTABLE="haskell" somewhere in your .zshrc

Customization

Define the variable ZSH_THEME_GIT_PROMPT_CACHE=1 in order to enable caching.
Define the variable ZSH_GIT_PROMPT_SHOW_UPSTREAM=1 in order to see the remote branch you are tracking.
Define the variable ZSH_GIT_PROMPT_SHOW_UPSTREAM=2 to show the remote as above but omit the remote branch when its name is equal to the local branch.
To disable any status component(s), set the following control variables to 0. All default to 1 (enabled) unless otherwise noted.
- ZSH_GIT_PROMPT_SHOW_UPSTREAM
  - Defaults to 0 (off)
- ZSH_GIT_PROMPT_SHOW_BEHIND
- ZSH_GIT_PROMPT_SHOW_AHEAD
- ZSH_GIT_PROMPT_SHOW_REBASE
- ZSH_GIT_PROMPT_SHOW_MERGING
- ZSH_GIT_PROMPT_SHOW_BISECT
- ZSH_GIT_PROMPT_SHOW_STAGED
- ZSH_GIT_PROMPT_SHOW_CONFLICTS
- ZSH_GIT_PROMPT_SHOW_CHANGED
- ZSH_GIT_PROMPT_SHOW_UNTRACKED
- ZSH_GIT_PROMPT_SHOW_STASHED

Demo:

By default, python version invokes python. To force a specific python interpreter: ZSH_GIT_PROMPT_PYBIN=/usr/bin/python2.7.
You may redefine the function git_super_status (after the source statement) to adapt it to your needs (to change the order in which the information is displayed).
To modify the symbols/colors of the theme, simply redefine the variables at bottom of the the zshrc.sh after sourcing. This could be in your ~/.zshrc or sourced elsewhere. These are the defaults:

    ZSH_THEME_GIT_PROMPT_PREFIX="["
    ZSH_THEME_GIT_PROMPT_SUFFIX="]"
    ZSH_THEME_GIT_PROMPT_HASH_PREFIX=":"
    ZSH_THEME_GIT_PROMPT_SEPARATOR="|"
    ZSH_THEME_GIT_PROMPT_BRANCH="%{$fg_bold[magenta]%}"
    ZSH_THEME_GIT_PROMPT_STAGED="%{$fg[red]%}%{●%G%}"
    ZSH_THEME_GIT_PROMPT_CONFLICTS="%{$fg[red]%}%{✖%G%}"
    ZSH_THEME_GIT_PROMPT_CHANGED="%{$fg[blue]%}%{✚%G%}"
    ZSH_THEME_GIT_PROMPT_BEHIND="%{↓%2G%}"
    ZSH_THEME_GIT_PROMPT_BEHIND_AHEAD_SEPARATOR=""
    ZSH_THEME_GIT_PROMPT_AHEAD="%{↑%2G%}"
    ZSH_THEME_GIT_PROMPT_STASHED="%{$fg_bold[blue]%}%{⚑%G%}"
    ZSH_THEME_GIT_PROMPT_UNTRACKED="%{$fg[cyan]%}%{…%G%}"
    ZSH_THEME_GIT_PROMPT_CLEAN="%{$fg_bold[green]%}%{✔%G%}"
    ZSH_THEME_GIT_PROMPT_LOCAL=" L"
    # The remote branch will be shown between these two
    ZSH_THEME_GIT_PROMPT_UPSTREAM_FRONT=" {%{$fg_bold[blue]%}"
    ZSH_THEME_GIT_PROMPT_UPSTREAM_END="%{${reset_color}%}}"

Enjoy!

Development

The analyzing script need to produce an output like the following:

REPO_IS_REPOSITORY 1
REPO_BRANCH master
REPO_AHEAD 1
REPO_BEHIND 0
REPO_STAGED 0
REPO_CONFLICTS 0
REPO_CHANGED 1
REPO_UNTRACKED 0

Here is a table of all attributes:

Attribute	Description
REPO_IS_REPOSITORY	Needs to be defined so that a prompt is produced.
REPO_BRANCH	The name of the branch or the hash of the HEAD.
REPO_AHEAD	How many commits the HEAD is behind the upstream ...
REPO_BEHIND	... and ahead of the upstream.
REPO_STAGED	How many files are staged,
REPO_CHANGED	changed,
REPO_CONFLICTS	in conflict,
REPO_UNTRACKED	and untracked.
REPO_STASHED	How many stashes.
REPO_LOCAL_ONLY	The branch has no upstream.
REPO_UPSTREAM	The name of the remote repository.
REPO_MERGING	Whether we are merging.
REPO_REBASE	Information about rebasing.

biggerfisch / zsh-git-prompt