Tizian 「ティツィアーン」
3bbdb9d747
deploy/redeploy.sh deploys main only if every new commit is signed by a key in deploy/allowed-signers, and finds out after CI. On 2026-10-09 that held learn.halkyon.eu at v0.2.2 for two days: 37 commits had reached main unsigned, and every deploy since refused them. tool/check_signatures.sh applies the same rule to a push, to the commits it brings to main that the remote doesn't have yet (the list as the pushed commit has it), and tool/check.sh runs it first when it runs as the pre-push hook: a second, where the rest takes minutes. CI runs check.sh under its own name and skips it. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01MMm7usAo6q9ZZRoPkWjoxi Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
46 lines
1.9 KiB
Shell
Executable file
46 lines
1.9 KiB
Shell
Executable file
#!/usr/bin/env bash
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# Refuses a push to main that brings a commit not signed by a key in deploy/allowed-signers:
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# the rule deploy/redeploy.sh applies before it deploys main, after CI passed. Checked here, a
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# push of an unsigned commit fails on the laptop instead of after CI (it did on 2026-10-09,
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# when 37 such commits had kept learn.halkyon.eu at v0.2.2 since 2026-10-07).
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#
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# tool/check.sh runs it first as the pre-push hook, passing on git's arguments (the remote) and
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# stdin (a line per ref pushed: local ref, local commit, remote ref, remote commit). It checks
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# the commits pushed to main that no ref of that remote has yet. By hand, for what main would
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# bring:
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#
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# printf 'refs/heads/main %s refs/heads/main 0\n' "$(git rev-parse main)" |
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# tool/check_signatures.sh origin
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set -euo pipefail
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remote=${1:-origin}
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allowed=$(mktemp)
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trap 'rm -f "$allowed"' EXIT
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unsigned=''
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while read -r _local_ref local_sha remote_ref _remote_sha; do
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[ "$remote_ref" = refs/heads/main ] || continue
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# Deleting a branch pushes no commits.
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case $local_sha in *[!0]*) ;; *) continue ;; esac
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# The list as the pushed commit has it; its comment lines match no fingerprint.
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git show "$local_sha:deploy/allowed-signers" >"$allowed"
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unsigned+=$(git log --format='%H %G? %GP' "$local_sha" --not --remotes="$remote" |
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while read -r commit status key; do
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# G: a good signature; U: good, by a key the keyring doesn't vouch for (the list does).
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if { [ "$status" = G ] || [ "$status" = U ]; } && [ -n "$key" ] &&
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grep -qx "$key" "$allowed"; then
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continue
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fi
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echo "$commit"
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done)$'\n'
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done
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if [ -n "${unsigned//[[:space:]]/}" ]; then
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echo 'Not signed by a key in deploy/allowed-signers, which deploying main requires:' >&2
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for commit in $unsigned; do
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git log -1 --format=' %h %s' "$commit" >&2
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done
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echo 'Sign them, e.g. git rebase --force-rebase --gpg-sign <the commit before the first>,' \
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'and push again.' >&2
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exit 1
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fi
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