Do not remove develop / main branches

- `develop` is the default for git-flow
- `main` the "new default" for git in general

Signed-off-by: Knut Ahlers <knut@ahlers.me>

bin/git-ps

@@ -10,13 +10,13 @@ git loadkey
 
 step "Fetching data from remote..."
 for remote in $(git remote -v | awk '{print $1}' | sort | uniq); do
-	step "+++ Remote: '${remote}'"
-	git fetch -p ${remote} --tags
+  step "+++ Remote: '${remote}'"
+  git fetch -p ${remote} --tags
 done
 
 [[ -z ${jump_branch} ]] || {
-	step "Switching to branch ${jump_branch}"
-	git switch "${jump_branch}"
+  step "Switching to branch ${jump_branch}"
+  git switch "${jump_branch}"
 }
 
 step "Rebasing branch / updating submodules..."
@@ -24,13 +24,13 @@ git pull --rebase && git submodule update --init --recursive
 
 step "Cleaning local branches..."
 for branch in $(git branch --merged | grep -v '^*'); do
-	# Do not delete master as the main branch
-	if (test "${branch}" != "master"); then
-		git branch -d ${branch}
-	fi
+  # Do not delete master as the main branch
+  if ! [[ $branch =~ (develop|main|master) ]]; then
+    git branch -d ${branch}
+  fi
 done
 
 step "Removing local branches where remote branch is gone..."
 if (git branch -vv | grep -q ': gone]'); then
-	git branch -vv | awk '/: gone]/{print $1}' | xargs git branch -D
+  git branch -vv | awk '/: gone]/{print $1}' | xargs git branch -D
 fi