I am very bad at shell scripting (with bash), I am looking for a way to check if the current git branch is "x", and abort the script if it is not "x".
#!/usr/bin/env bash
CURRENT_BRANCH="$(git branch)"
if [[ "$CURRENT_BRANCH" -ne "master" ]]; then
echo "Aborting script because you are not on the master branch."
return; # I need to abort here!
fi
echo "foo"
but this is not quite right
Use git rev-parse --abbrev-ref HEAD to get the name of the current branch.
Then it's only a matter of simply comparing values in your script:
BRANCH="$(git rev-parse --abbrev-ref HEAD)"
if [[ "$BRANCH" != "x" ]]; then
echo 'Aborting script';
exit 1;
fi
echo 'Do stuff';
git rev-parse --abbrev-ref HEAD is the right way for this case, where you want to get something back (and not an error) for if HEAD is currently detached. To distinguish the detached HEAD case, use git symbolic-ref HEAD instead.
[[ $(git rev-parse --abbrev-ref HEAD) == "master" ]] && echo "on master"One option would be to parse the output of the git branch command:
BRANCH=$(git branch | sed -nr 's/\*\s(.*)/\1/p')
if [ -z $BRANCH ] || [ $BRANCH != "master" ]; then
exit 1
fi
But a variant that uses git internal commands to get just the active branch name as suggested by @knittl is less error prone and preferable
You want to use exit instead of return.
With git 2 you can use a command easier to remember:
[[ $(git branch --show-current) == "master" ]] && echo "you are on master" || (echo "you are not on master"; echo "goodbye")
This is a one-liner version (notice the brackets on the last two commands to group them).
