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buildx(build): pin implicit git contexts consistently #1085

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30 changes: 15 additions & 15 deletions __tests__/buildx/build.test.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -90,40 +90,40 @@ describe('gitContext', () => {
[{ref: 'refs/tags/v1.0.0', format: undefined, prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: true}, 'https://github.com/docker/actions-toolkit.git#860c1904a1ce19322e91ac35af1ab07466440c37'],
[{ref: 'refs/pull/15/merge', checksum: undefined, format: undefined, prHeadRef: true, sendGitQueryAsInput: false, buildxQuerySupport: true}, 'https://github.com/docker/actions-toolkit.git#f11797113e5a9b86bd976329c5dbb8a8bfdfadfa'],
// no format set (defaults to query only when client-side query resolution is enabled and supported)
[{ref: 'refs/heads/master', format: undefined, prHeadRef: false, sendGitQueryAsInput: true, buildxQuerySupport: true}, 'https://github.com/docker/actions-toolkit.git?ref=refs/heads/master&checksum=860c1904a1ce19322e91ac35af1ab07466440c37'],
[{ref: 'refs/heads/master', checksum: undefined, format: undefined, prHeadRef: false, sendGitQueryAsInput: true, buildxQuerySupport: true}, 'https://github.com/docker/actions-toolkit.git?ref=860c1904a1ce19322e91ac35af1ab07466440c37'],
[{ref: 'refs/pull/15/merge', checksum: undefined, format: undefined, prHeadRef: false, sendGitQueryAsInput: true, buildxQuerySupport: true}, 'https://github.com/docker/actions-toolkit.git?ref=860c1904a1ce19322e91ac35af1ab07466440c37'],
[{ref: 'refs/pull/15/merge', checksum: undefined, format: undefined, prHeadRef: true, sendGitQueryAsInput: true, buildxQuerySupport: true}, 'https://github.com/docker/actions-toolkit.git?ref=f11797113e5a9b86bd976329c5dbb8a8bfdfadfa'],
[{ref: 'refs/heads/master', format: undefined, prHeadRef: false, sendGitQueryAsInput: true, buildxQuerySupport: false}, 'https://github.com/docker/actions-toolkit.git#860c1904a1ce19322e91ac35af1ab07466440c37'],
[{ref: 'refs/heads/master', format: undefined, prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: true, attrs: {}}, 'https://github.com/docker/actions-toolkit.git#860c1904a1ce19322e91ac35af1ab07466440c37'],
[{ref: 'refs/heads/master', checksum: undefined, format: undefined, prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: true, attrs: {checksum: 'cafebabe'}}, 'https://github.com/docker/actions-toolkit.git#cafebabe'],
[{ref: 'refs/heads/master', format: undefined, prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: true, attrs: {subdir: 'subdir'}}, 'https://github.com/docker/actions-toolkit.git#860c1904a1ce19322e91ac35af1ab07466440c37:subdir'],
[{ref: 'refs/heads/master', format: undefined, prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: true, attrs: {ref: 'refs/tags/v1.0.0'}}, 'https://github.com/docker/actions-toolkit.git#860c1904a1ce19322e91ac35af1ab07466440c37'],
[{ref: 'refs/heads/master', format: undefined, prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: true, attrs: {'keep-git-dir': 'true'}}, 'https://github.com/docker/actions-toolkit.git?ref=refs/heads/master&checksum=860c1904a1ce19322e91ac35af1ab07466440c37&keep-git-dir=true'],
[{ref: 'refs/heads/master', format: undefined, prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: false, attrs: {'keep-git-dir': 'true'}}, 'https://github.com/docker/actions-toolkit.git?ref=refs/heads/master&checksum=860c1904a1ce19322e91ac35af1ab07466440c37&keep-git-dir=true'],
[{ref: 'refs/heads/master', checksum: undefined, format: undefined, prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: true, attrs: {'keep-git-dir': 'true'}}, 'https://github.com/docker/actions-toolkit.git?ref=860c1904a1ce19322e91ac35af1ab07466440c37&keep-git-dir=true'],
[{ref: 'refs/heads/master', checksum: undefined, format: undefined, prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: false, attrs: {'keep-git-dir': 'true'}}, 'https://github.com/docker/actions-toolkit.git?ref=860c1904a1ce19322e91ac35af1ab07466440c37&keep-git-dir=true'],
[{ref: 'refs/heads/master', checksum: undefined, format: undefined, prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: true, attrs: {checksum: 'cafebabe', 'keep-git-dir': 'true'}}, 'https://github.com/docker/actions-toolkit.git?ref=refs/heads/master&checksum=cafebabe&keep-git-dir=true'],
[{ref: 'refs/heads/master', format: undefined, prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: true, attrs: {submodules: 'false'}}, 'https://github.com/docker/actions-toolkit.git?ref=refs/heads/master&checksum=860c1904a1ce19322e91ac35af1ab07466440c37&submodules=false'],
[{ref: 'refs/heads/master', format: undefined, prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: false, attrs: {submodules: 'false'}}, 'https://github.com/docker/actions-toolkit.git?ref=refs/heads/master&checksum=860c1904a1ce19322e91ac35af1ab07466440c37&submodules=false'],
[{ref: 'refs/heads/master', checksum: undefined, format: undefined, prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: true, attrs: {submodules: 'false'}}, 'https://github.com/docker/actions-toolkit.git?ref=860c1904a1ce19322e91ac35af1ab07466440c37&submodules=false'],
[{ref: 'refs/heads/master', checksum: undefined, format: undefined, prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: false, attrs: {submodules: 'false'}}, 'https://github.com/docker/actions-toolkit.git?ref=860c1904a1ce19322e91ac35af1ab07466440c37&submodules=false'],
// query format
[{ref: 'refs/heads/master', format: 'query', prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: true}, 'https://github.com/docker/actions-toolkit.git?ref=refs/heads/master&checksum=860c1904a1ce19322e91ac35af1ab07466440c37'],
[{ref: 'master', format: 'query', prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: true}, 'https://github.com/docker/actions-toolkit.git?ref=refs/heads/master&checksum=860c1904a1ce19322e91ac35af1ab07466440c37'],
[{ref: 'refs/heads/master', checksum: undefined, format: 'query', prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: true}, 'https://github.com/docker/actions-toolkit.git?ref=860c1904a1ce19322e91ac35af1ab07466440c37'],
[{ref: 'master', checksum: undefined, format: 'query', prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: true}, 'https://github.com/docker/actions-toolkit.git?ref=860c1904a1ce19322e91ac35af1ab07466440c37'],
[{ref: 'refs/pull/15/merge', checksum: undefined, format: 'query', prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: true}, 'https://github.com/docker/actions-toolkit.git?ref=860c1904a1ce19322e91ac35af1ab07466440c37'],
[{ref: 'refs/tags/v1.0.0', format: 'query', prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: true}, 'https://github.com/docker/actions-toolkit.git?ref=refs/tags/v1.0.0&checksum=860c1904a1ce19322e91ac35af1ab07466440c37'],
[{ref: 'refs/tags/v1.0.0', checksum: undefined, format: 'query', prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: true}, 'https://github.com/docker/actions-toolkit.git?ref=860c1904a1ce19322e91ac35af1ab07466440c37'],
[{ref: 'refs/pull/15/merge', checksum: undefined, format: 'query', prHeadRef: true, sendGitQueryAsInput: false, buildxQuerySupport: true}, 'https://github.com/docker/actions-toolkit.git?ref=f11797113e5a9b86bd976329c5dbb8a8bfdfadfa'],
[{ref: 'refs/pull/15/merge', checksum: undefined, format: 'query', prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: true, attrs: {checksum: 'cafebabe'}}, 'https://github.com/docker/actions-toolkit.git?ref=refs/pull/15/merge&checksum=cafebabe'],
[{ref: 'refs/heads/master', format: 'query', prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: true, subdir: 'subdir'}, 'https://github.com/docker/actions-toolkit.git?ref=refs/heads/master&checksum=860c1904a1ce19322e91ac35af1ab07466440c37&subdir=subdir'],
[{ref: 'refs/heads/master', format: 'query', prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: true, subdir: '.'}, 'https://github.com/docker/actions-toolkit.git?ref=refs/heads/master&checksum=860c1904a1ce19322e91ac35af1ab07466440c37'],
[{ref: 'refs/heads/master', checksum: undefined, format: 'query', prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: true, subdir: 'subdir'}, 'https://github.com/docker/actions-toolkit.git?ref=860c1904a1ce19322e91ac35af1ab07466440c37&subdir=subdir'],
[{ref: 'refs/heads/master', checksum: undefined, format: 'query', prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: true, subdir: '.'}, 'https://github.com/docker/actions-toolkit.git?ref=860c1904a1ce19322e91ac35af1ab07466440c37'],
[{ref: 'refs/heads/master', checksum: undefined, format: 'query', prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: true, attrs: {ref: 'refs/tags/v1.0.0', checksum: 'cafebabe', subdir: 'subdir', submodules: 'false'}}, 'https://github.com/docker/actions-toolkit.git?ref=refs/heads/master&checksum=cafebabe&subdir=subdir&submodules=false'],
[{ref: 'refs/heads/master', format: 'query', prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: true, subdir: 'subdir', attrs: {'keep-git-dir': 'true'}}, 'https://github.com/docker/actions-toolkit.git?ref=refs/heads/master&checksum=860c1904a1ce19322e91ac35af1ab07466440c37&subdir=subdir&keep-git-dir=true'],
[{ref: 'refs/heads/master', format: 'query', prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: true, attrs: {submodules: 'true'}}, 'https://github.com/docker/actions-toolkit.git?ref=refs/heads/master&checksum=860c1904a1ce19322e91ac35af1ab07466440c37&submodules=true'],
[{ref: 'refs/heads/master', format: 'query', prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: true, attrs: {submodules: 'false'}}, 'https://github.com/docker/actions-toolkit.git?ref=refs/heads/master&checksum=860c1904a1ce19322e91ac35af1ab07466440c37&submodules=false'],
[{ref: 'refs/heads/master', format: 'query', prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: true, attrs: {'keep-git-dir': 'true', submodules: 'false'}}, 'https://github.com/docker/actions-toolkit.git?ref=refs/heads/master&checksum=860c1904a1ce19322e91ac35af1ab07466440c37&keep-git-dir=true&submodules=false'],
[{ref: 'refs/heads/master', checksum: undefined, format: 'query', prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: true, subdir: 'subdir', attrs: {'keep-git-dir': 'true'}}, 'https://github.com/docker/actions-toolkit.git?ref=860c1904a1ce19322e91ac35af1ab07466440c37&subdir=subdir&keep-git-dir=true'],
[{ref: 'refs/heads/master', checksum: undefined, format: 'query', prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: true, attrs: {submodules: 'true'}}, 'https://github.com/docker/actions-toolkit.git?ref=860c1904a1ce19322e91ac35af1ab07466440c37&submodules=true'],
[{ref: 'refs/heads/master', checksum: undefined, format: 'query', prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: true, attrs: {submodules: 'false'}}, 'https://github.com/docker/actions-toolkit.git?ref=860c1904a1ce19322e91ac35af1ab07466440c37&submodules=false'],
[{ref: 'refs/heads/master', checksum: undefined, format: 'query', prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: true, attrs: {'keep-git-dir': 'true', submodules: 'false'}}, 'https://github.com/docker/actions-toolkit.git?ref=860c1904a1ce19322e91ac35af1ab07466440c37&keep-git-dir=true&submodules=false'],
// fragment format
[{ref: 'refs/heads/master', format: 'fragment', prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: true}, 'https://github.com/docker/actions-toolkit.git#860c1904a1ce19322e91ac35af1ab07466440c37'],
[{ref: 'master', format: 'fragment', prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: true}, 'https://github.com/docker/actions-toolkit.git#860c1904a1ce19322e91ac35af1ab07466440c37'],
[{ref: 'refs/pull/15/merge', checksum: undefined, format: 'fragment', prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: true}, 'https://github.com/docker/actions-toolkit.git#860c1904a1ce19322e91ac35af1ab07466440c37'],
[{ref: 'refs/tags/v1.0.0', format: 'fragment', prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: true}, 'https://github.com/docker/actions-toolkit.git#860c1904a1ce19322e91ac35af1ab07466440c37'],
[{ref: 'refs/pull/15/merge', checksum: undefined, format: 'fragment', prHeadRef: true, sendGitQueryAsInput: false, buildxQuerySupport: true}, 'https://github.com/docker/actions-toolkit.git#f11797113e5a9b86bd976329c5dbb8a8bfdfadfa'],
[{ref: 'refs/pull/15/merge', checksum: undefined, format: 'fragment', prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: true, attrs: {checksum: 'cafebabe'}}, 'https://github.com/docker/actions-toolkit.git#refs/pull/15/merge'],
[{ref: 'refs/pull/15/merge', checksum: undefined, format: 'fragment', prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: true, attrs: {checksum: 'cafebabe'}}, 'https://github.com/docker/actions-toolkit.git#cafebabe'],
[{ref: 'refs/heads/master', checksum: undefined, format: 'fragment', prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: true, attrs: {checksum: 'cafebabe', subdir: 'subdir', ref: 'refs/tags/v1.0.0'}}, 'https://github.com/docker/actions-toolkit.git#cafebabe:subdir'],
[{ref: 'refs/heads/master', format: 'fragment', prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: true, attrs: {'keep-git-dir': 'true'}}, 'https://github.com/docker/actions-toolkit.git#860c1904a1ce19322e91ac35af1ab07466440c37'],
[{ref: 'refs/heads/master', format: 'fragment', prHeadRef: false, sendGitQueryAsInput: false, buildxQuerySupport: true, subdir: 'subdir'}, 'https://github.com/docker/actions-toolkit.git#860c1904a1ce19322e91ac35af1ab07466440c37:subdir'],
Expand Down
44 changes: 21 additions & 23 deletions src/buildx/build.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -69,23 +69,10 @@ export class Build {
ref = ref.replace(/\/merge$/g, '/head');
}

const inputChecksum = opts?.checksum || commonAttrs.checksum;
const inputSubdir = opts?.subdir || commonAttrs.subdir;
const checksum = inputChecksum || (ref.startsWith(`refs/pull/`) ? undefined : github.context.sha);

// BuildKit resolves PR refs remotely at build time, so mutable refs like
// refs/pull/*/{merge,head} can drift away from the event SHA. actions/checkout
// avoids that by fetching the exact commit into a local PR ref; here we do the
// equivalent for implicit PR contexts by rewriting them to the event's commit SHA.
if (!inputChecksum && ref.startsWith(`refs/pull/`)) {
if (ref.endsWith('/merge')) {
ref = github.context.sha;
} else if (ref.endsWith('/head') && typeof github.context.payload.pull_request?.head?.sha === 'string') {
ref = github.context.payload.pull_request.head.sha;
}
}

const baseURL = `${GitHub.serverURL}/${github.context.repo.owner}/${github.context.repo.repo}.git`;
const explicitChecksum = opts?.checksum || commonAttrs.checksum;
const subdir = opts?.subdir || commonAttrs.subdir;

let format = opts?.format;
if (!format) {
format = 'fragment';
Expand All @@ -102,22 +89,33 @@ export class Build {
}
}

// Implicit git contexts should resolve to the event commit. PR head refs
// pin the pull request head SHA instead of the merge commit SHA.
let implicitRef = github.context.sha || ref;
if (ref.startsWith(`refs/pull/`) && ref.endsWith('/head')) {
implicitRef = typeof github.context.payload.pull_request?.head?.sha === 'string' ? github.context.payload.pull_request.head.sha : ref;
}
const pinnedRef = explicitChecksum || implicitRef;

if (format === 'query') {
const query = [`ref=${ref}`];
if (checksum) {
query.push(`checksum=${checksum}`);
// FIXME: Query mode can preserve a symbolic ref plus checksum, but
// BuildKit still resolves that ref first. A future attribute to
// fetch by commit could keep ref/checksum in the URL while forcing a
// commit-based fetch to avoid mismatches when the ref moves.
const query = [`ref=${explicitChecksum ? ref : pinnedRef}`];
if (explicitChecksum) {
query.push(`checksum=${explicitChecksum}`);
}
if (inputSubdir && inputSubdir !== '.') {
query.push(`subdir=${inputSubdir}`);
if (subdir && subdir !== '.') {
query.push(`subdir=${subdir}`);
}
for (const [name, value] of extraAttrs) {
query.push(`${name}=${value}`);
}
return `${baseURL}?${query.join('&')}`;
}

const fragmentRef = inputChecksum && ref.startsWith(`refs/pull/`) ? ref : (checksum ?? ref);
return `${baseURL}#${fragmentRef}${inputSubdir && inputSubdir !== '.' ? `:${inputSubdir}` : ''}`;
return `${baseURL}#${pinnedRef}${subdir && subdir !== '.' ? `:${subdir}` : ''}`;
}

public getImageIDFilePath(): string {
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