Fix default branch detection

[rjriajul]

This pull request updates the way the default branch name is detected in the util/update_scripts.sh script. The new approach uses a more direct and reliable git ls-remote --symref command instead of parsing the output of git remote show.

• Improved detection of the default branch name by replacing the use of git remote show with git ls-remote --symref and related parsing, making the script more robust and less dependent on output formatting.

[pzhlkj6612]

Plumbing commands are good for parsing!

[pzhlkj6612]

A very tiny point:

FFmpeg-Builds/util/update_scripts.sh

Lines 64 to 74 in 7dee79a

	elif [[ -n "${CUR_COMMIT}" ]]; then # GIT
	if [[ -n "${CUR_TAGFILTER}" ]]; then
	NEW_COMMIT="$(git -c 'versionsort.suffix=-' ls-remote --exit-code --tags --refs --sort "v:refname" "${CUR_REPO}" "refs/tags/${CUR_TAGFILTER}" | tail -n1 | cut -d/ -f3- | xargs)"
	else
	if [[ -z "${CUR_BRANCH}" ]]; then
	# Fetch default branch name
	CUR_BRANCH="$(git remote show "${CUR_REPO}" | grep "HEAD branch:" | cut -d":" -f2 | xargs)"
	echo "Found default branch ${CUR_BRANCH}"
	fi
	NEW_COMMIT="$(git ls-remote --exit-code --heads --refs "${CUR_REPO}" refs/heads/"${CUR_BRANCH}" | cut -f1)"
	fi

Maybe we can make all git ls-remote usage consistent by adding --exit-code?

Suggested change

	CUR_BRANCH="$(git ls-remote --symref "${CUR_REPO}" HEAD | awk '/^ref:/ {print $2}' | sed 's|refs/heads/||')"
	CUR_BRANCH="$(git ls-remote --exit-code --symref "${CUR_REPO}" HEAD | awk '/^ref:/ {print $2}' | sed 's|refs/heads/||')"

I know "HEAD" should always be there, though.

[rjriajul]

Good catch on the --exit-code! I accidentally pushed the fix manually instead of using the UI button, but I just force-pushed again to make sure you were added as a co-author on the commit. Thanks for the review!

[rjriajul]

Hey @BtbN, just checking in to see if you've had a chance to look at this PR!