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fix(sync): chain names the caller's file, the @ref cut before the path #8

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Merged
jshvn merged 1 commit into from
Sep 14, 2026
Merged

fix(sync): chain names the caller's file, the @ref cut before the path #8

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24 changes: 24 additions & 0 deletions .github/chain-file.sh
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Original file line number Diff line number Diff line change
@@ -0,0 +1,24 @@
#!/bin/sh
# chain-file.sh "$GITHUB_WORKFLOW_REF": print the caller's own workflow file, the argument
# to `gh workflow run` when a run chains the next one.
#
# The ref is owner/repo/.github/workflows/<file>@<ref>, and <ref> holds slashes of its own
# (refs/heads/main), so the @ and everything after it come off before the path does.
#
# `--check` runs this file's own cases instead, so the rule and its proof stay together.
set -eu

chain_file() {
path="${1%%@*}"
printf '%s\n' "${path##*/}"
}

if [ "${1-}" = --check ]; then
[ "$(chain_file 'katoptra/dropbox/.github/workflows/sync.yml@refs/heads/main')" = sync.yml ]
[ "$(chain_file 'katoptra/ctan/.github/workflows/hourly.yml@refs/heads/josh/topic')" = hourly.yml ]
[ "$(chain_file 'o/r/.github/workflows/sync.yml@81fb6ee34abc7703087cfe4a303263febc912c6f')" = sync.yml ]
echo "chain-file: PASS"
exit 0
fi

chain_file "$1"
1 change: 1 addition & 0 deletions .github/workflows/ci.yml
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Expand Up @@ -20,6 +20,7 @@ jobs:
if: matrix.variant == 'rsync'
run: |
sh .github/validate-vars.sh --check
sh .github/chain-file.sh --check
sh docker/gpg-gate-check.sh
- uses: docker/setup-buildx-action@37fe631027851001ddb9b187196cc803df7f5f0e # v4.3.0
# Layers cached in Actions, one scope per variant; release reads the same scope, so a
Expand Down
4 changes: 2 additions & 2 deletions .github/workflows/sync.yml
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Expand Up @@ -70,9 +70,9 @@ jobs:
if: success()
env:
GH_TOKEN: ${{ github.token }}
# The caller's own file name, whatever it is; workflow_ref is owner/repo/.github/workflows/<file>@<ref>.
# The caller's own file name, whatever it is, cut from GITHUB_WORKFLOW_REF by chain-file.sh.
run: |
if [ -f .run/chain ]; then
f="${GITHUB_WORKFLOW_REF##*/}"; gh workflow run "${f%%@*}" --ref "$GITHUB_REF_NAME"
gh workflow run "$(sh .lib/.github/chain-file.sh "$GITHUB_WORKFLOW_REF")" --ref "$GITHUB_REF_NAME"
echo "chained: next run queued" >> "$GITHUB_STEP_SUMMARY"
fi