tcwg-report-orphan-rr-branches.sh: Give script a better name

Change-Id: I45a1bd2f0b7c43e0f8803c4db0967330d8945755

1 files changed, 54 insertions, 0 deletions

diff --git a/tcwg-report-orphan-rr-branches.sh b/tcwg-report-orphan-rr-branches.sh
new file mode 100755
index 00000000..2522fe46
--- /dev/null
+++ b/tcwg-report-orphan-rr-branches.sh
@@ -0,0 +1,54 @@
+#!/bin/bash
+
+set -euf -o pipefail
+
+# Round-robin CI loops store their baseline state in:
+# 1. toolchain/ci/base-artifacts.git repo stores artifacts of
+#    baseline/reference build in branches named $ci_project/$ci_config.
+# 2. toolchain/ci/$project.git repos store sources of $project that match
+#    baseline/reference build in branches named $ci_project/$ci_config.
+#
+# Therefore, for a given $ci_project/$ci_config there should be a branch
+# in toolchain/ci/base-artifacts.git repo and every relevant $project repo
+# toolchain/ci/$project.git .
+#
+# If there are branches in toolchain/ci/$project.git repos that have
+# no match in toolchain/ci/base-artifacts.git repo, then such branches
+# are orphans and can be removed.
+#
+# This script lists such orphan branches.
+
+scripts=$(dirname "$0")
+# shellcheck source=jenkins-helpers.sh
+. "$scripts/jenkins-helpers.sh"
+
+convert_args_to_variables "$@"
+
+repos+=("${repos[@]-default}")
+refs_prefix="${refs_prefix-refs/heads/linaro-local/ci/}"
+refs_url="${refs_url-https://git.linaro.org/toolchain/ci/base-artifacts}"
+verbose="${verbose-false}"
+
+if $verbose; then
+    set -x
+fi
+
+if [ x"${repos[*]}" = x"default" ]; then
+    repos=(binutils-gdb gcc glibc linux llvm-project newlib qemu)
+fi
+
+branch_list=$(mktemp)
+git ls-remote "$refs_url" "${refs_prefix}*" | awk '{ print $2 }' > $branch_list
+
+for repo in "${repos[@]}"; do
+    repo_url="$(dirname "$refs_url")/$repo"
+    while IFS= read -r ref; do
+	if grep -q "^$ref\$" $branch_list; then
+	    continue
+	fi
+
+	echo "$repo $ref"
+    done < <(git ls-remote "$repo_url" "${refs_prefix}*" | awk '{ print $2 }')
+done
+
+rm $branch_list