40 lines
1.9 KiB
Bash
40 lines
1.9 KiB
Bash
#!/bin/bash
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set -e
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ancestor_horizon=28 # days (4 weeks)
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# We need to add a new remote for the upstream target branch, since this script
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# could be running in a personal fork of the repository which has out of date
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# branches.
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#
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# Limit the fetch to a certain date horizon to limit the amount of data we get.
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# If the branch was forked from origin/main before this horizon, it should
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# probably be rebased.
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if ! git ls-remote --exit-code upstream >/dev/null 2>&1 ; then
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git remote add upstream https://gitlab.gnome.org/GNOME/pika.git
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fi
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git fetch --shallow-since="$(date --date="${ancestor_horizon} days ago" +%Y-%m-%d)" upstream &> ./fetch_upstream.log
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# Work out the newest common ancestor between the detached HEAD that this CI job
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# has checked out, and the upstream target branch (which will typically be
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# `upstream/main` or `upstream/glib-2-62`).
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# `${CI_MERGE_REQUEST_TARGET_BRANCH_NAME}` or `${CI_MERGE_REQUEST_SOURCE_BRANCH_NAME}`
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# are only defined if we’re running in a merge request pipeline,
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# fall back to `${CI_DEFAULT_BRANCH}` or `${CI_COMMIT_BRANCH}` respectively
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# otherwise.
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# add mr-origin
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git remote add mr-origin ${CI_MERGE_REQUEST_SOURCE_PROJECT_URL}
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source_branch="${CI_MERGE_REQUEST_SOURCE_BRANCH_NAME:-${CI_COMMIT_BRANCH}}"
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git fetch --shallow-since="$(date --date="${ancestor_horizon} days ago" +%Y-%m-%d)" mr-origin "${source_branch}" &> ./fetch_origin.log
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newest_common_ancestor_sha=$(diff --old-line-format='' --new-line-format='' <(git rev-list --first-parent "upstream/${CI_MERGE_REQUEST_TARGET_BRANCH_NAME:-${CI_DEFAULT_BRANCH}}") <(git rev-list --first-parent "mr-origin/${source_branch}") | head -1)
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if [ -z "${newest_common_ancestor_sha}" ]; then
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echo "Couldn’t find common ancestor with upstream main branch. This typically"
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echo "happens if you branched from main a long time ago. Please update"
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echo "your clone, rebase, and re-push your branch."
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exit 1
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fi
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