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CI: .murdock: add some docs to CI_BASE_BRANCH and is_bors_build()

This commit is contained in:
Kaspar Schleiser 2023-02-04 15:38:23 +01:00
parent 76d8a7e732
commit 49da7a446a

View File

@ -178,10 +178,18 @@ check_label() {
return $?
}
# this function returns 0 when this is build is building one of the two bors
# branches ("staging" or "trying", 1 otherwise.
is_bors_build() {
test "${CI_BUILD_BRANCH}" = "staging" || test "${CI_BUILD_BRANCH}" = "trying"
}
# Set CI_BASE_COMMIT in case of a bors build.
# This assumes that bors always adds a single merge commit (possibly itself
# including multiple merges for PRs) on the base branch.
# That git command outputs the hash of the second merge commit (the one before
# the topmost merge), which should be the base branch HEAD.
# (CI_BASE_COMMIT is used by `can_fast_ci_run.py` to only build changes.)
if test -z "${CI_BASE_COMMIT}" && is_bors_build ; then
previous_merge="$(git log --merges --max-count 1 --skip 1 --pretty=format:%H)"
export CI_BASE_COMMIT="${previous_merge}"