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Top Forums UNIX for Dummies Questions & Answers [Solved] Help needed to have changing value to the command prompt string variable PS1 Post 302630075 by neutronscott on Wednesday 25th of April 2012 10:54:21 AM
Old 04-25-2012
with this double quoting, look at PS1 after assignment:

Code:
$ PS1="[$PWD $(git branch | grep '*') $] "
[/home/mute  $] declare -p PS1
declare -- PS1="[/home/mute  \$] "

Your variables are expanded inside of a double-quote before assignment. If you escape the $ then it will be stored inside of PS1. You can also use single quotes to avoid expansion, but you have some in there so those are the 1 character you need to treat special inside single quotes:

Code:
$ PS1='[$PWD $(git branch | grep '\''*'\'') $] '
fatal: Not a git repository (or any of the parent directories): .git
[/home/mute  $]

Having a command execute for each prompt is a bit much. Also maybe you'd like to make it a function and handle those fatal errors in case you leave a git branch.

Code:
[/home/mute/code  $] PS1='[$PWD $(git branch 2>/dev/null | grep '\''*'\'') $] '
[/home/mute/code  $] cd Twitter.awk/
[/home/mute/code/Twitter.awk * master $]

et voila!?
This User Gave Thanks to neutronscott For This Post:
 

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GIT-SH(1)																 GIT-SH(1)

NAME
git-sh -- a git shell SYNOPSIS
git-sh DESCRIPTION
git-sh starts an interactive bash(1) session modified for git-heavy workflows. Typical usage is to change into the directory of a git work tree or bare repository and run the git-sh command to start an interactive shell session. Top-level command aliases are created for all core git(1) subcommands, git-sh builtin aliases (see BUILTIN ALIASES), and git command aliases defined in ~/.gitconfig. BUILTIN ALIASES
git-sh loads a set of standard aliases in addition to all core git commands. The builtin aliases are overridden by aliases defined in the user or system gitconfig files. a git add b git branch c git checkout d git diff f git fetch --prune k git cherry-pick l git log --pretty=oneline --abbrev-commit n git commit --verbose --amend r git remote s git commit --dry-run --short t git diff --cached The Staging Area a git add aa git add --update (mnemonic: "add all") stage git add ap git add --patch p git diff --cached (mnemonic: "patch") ps git diff --cached --stat (mnemonic: "patch stat") unstage git reset HEAD Commits and Commit History ci git commit --verbose ca git commit --verbose --all amend git commit --verbose --amend n git commit --verbose --amend k git cherry-pick re git rebase --interactive pop git reset --soft HEAD^ peek git log -p --max-count=1 Fetching and Pulling f git fetch pm git pull (mnemonic: "pull merge") pr git pull --rebase (mnemonic: "pull rebase") Miscellaneous Commands d git diff ds git diff --stat (mnemonic: "diff stat") hard git reset --hard soft git reset --soft scrap git checkout HEAD CUSTOM ALIASES
Anything defined in the [alias] section of the repository, user, or system git config files are also available as top-level shell commands. Assuming a ~/.gitconfig that looked like this: [alias] ci = commit --verbose ca = commit -a d = diff s = status thanks = !git-thanks ... you might then have the following shell session: master!something> echo "stuff" >somefile master!something*> s M somefile master!something*> d diff --git a/somefile b/somefile -- a/somefile ++ b/somefile @@ -0,0 +1 @@ + stuff master!something*> ca -m "add stuff" master!something> thanks HEAD PROMPT The default prompt shows the current branch, a bang (!), and then the relative path to the current working directory from the root of the work tree. If the work tree includes modified files that have not yet been staged, a dirty status indicator (*) is also displayed. The git-sh prompt includes ANSI colors when the git color.ui option is set and enabled. To enable git-sh's prompt colors explicitly, set the color.sh config value to auto: $ git config --global color.sh auto Customize prompt colors by setting the color.sh.branch, color.sh.workdir, and color.sh.dirty git config values: $ git config --global color.sh.branch 'yellow reverse' $ git config --global color.sh.workdir 'blue bold' $ git config --global color.sh.dirty 'red' See colors in git for information. COMPLETION
Bash completion support is automatically enabled for all git built-in commands and also for aliases defined in the user ~/.gitconfig file. The auto-completion logic is smart enough to know an alias d that expands to git-diff should use the same completion configuration as the git-diff command. The completion code is a slightly modified version of the git bash completion script shipped with the core git distribution. The script is built into thegit-sh executable at compile time and need not be obtained or installed separately. CUSTOMIZING
Most git-sh behavior can be configured by editing the user or system gitconfig files (~/.gitconfig and /etc/gitconfig) either by hand or using git-config(1). The [alias] section is used to create basic command aliases. The /etc/gitshrc and ~/.gitshrc files are sourced (in that order) immediately before the shell becomes interactive. The ~/.bashrc file is sourced before either /etc/gitshrc or ~/.gitshrc. Any bash customizations defined there and not explicitly overrid- den by git-sh are also available. ENVIRONMENT
PS1 Set to the dynamic git-sh prompt. This can be customized in the ~/.gitshrc or /etc/gitshrc files. GIT_DIR Explicitly set the path to the git repository instead of assuming the nearest .git path. GIT_WORK_TREE Explicitly set the path to the root of the work tree instead of assuming the nearest parent directory with a .git repository. SEE ALSO
bash(1), git(1), git-config(1),http://github.com/rtomayko/git-sh Ryan Tomayko March 2010 GIT-SH(1)
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