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resolve

package
v0.3.0 Latest Latest
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 Go to latest Published: Oct 22, 2026 License: MIT Imports: 18 Imported by: 0

Documentation

Overview

Package resolve resolves action refs to commit SHAs, recursively discovers transitive dependencies, and verifies commit reachability.

Index

Constants

View Source 
const DefaultMaxRecursionDepth = 10

DefaultMaxRecursionDepth matches the runner's composite action recursion limit.

Variables

This section is empty.

Functions

func IsInvalidSelfRepositoryRef added in v0.1.6 

func IsInvalidSelfRepositoryRef(err error) bool

IsInvalidSelfRepositoryRef reports whether err contains an invalid nested self repository reference.

func LooksLikeSHA added in v0.1.0 

func LooksLikeSHA(ref string) bool

LooksLikeSHA returns true when ref is a hex string of SHA-1 (40) or SHA-256 (64) length — i.e. the user wrote a bare commit hash.

func ManifestImages added in v0.3.0 

func ManifestImages(yml, action string) []uses.Image

ManifestImages returns the unpinned images the action manifest yml runs: a Docker action's `runs.image` (a registry image or a Dockerfile it builds), or a composite's `docker://` steps. action names it as owner/repo[/path]@ref.

Types

type AncestryStatus 

type AncestryStatus int

AncestryStatus represents whether a pinned SHA is a legitimate ancestor of the live SHA. 

const (
	// AncestryConfirmed means the pinned SHA is an ancestor of the live SHA.
	AncestryConfirmed AncestryStatus = iota
	// AncestryNotAncestor means the pinned SHA is NOT an ancestor — possible forgery.
	AncestryNotAncestor
	// AncestryUnknown means GitHub didn't answer (an outage or rate limit).
	AncestryUnknown
)

type CompositeLocalPathError added in v0.1.4 

type CompositeLocalPathError struct {
	// Parent is the NWO@Ref of the composite action containing the local path.
	Parent string
	// LocalPath is the ./… value found in the composite's steps.
	LocalPath string
}

CompositeLocalPathError reports a `./…` use inside a remote composite. The path names the runner workspace, not the composite's repository, so it is never followed or locked. It is a warning carried on the resolver's error; callers separate it with SplitLocalPaths.

func SplitLocalPaths added in v0.3.0 

func SplitLocalPaths(err error) (local []*CompositeLocalPathError, rest error)

SplitLocalPaths separates the CompositeLocalPathErrors joined into err from the errors that remain. rest is nil when only local paths were reported.

func (*CompositeLocalPathError) Error added in v0.1.4 

func (e *CompositeLocalPathError) Error() string

type InvalidSelfRepositoryRefError added in v0.1.6 

type InvalidSelfRepositoryRefError struct {
	Parent string
	Ref    string
}

InvalidSelfRepositoryRefError is returned when a fetched composite carries the invalid `$/…@ref` form.

func (*InvalidSelfRepositoryRefError) Error added in v0.1.6 

func (e *InvalidSelfRepositoryRefError) Error() string

type LookupIssue added in v0.1.0 

type LookupIssue struct {
	Index   int    // position in the deps slice
	NWO     string // owner/repo
	Ref     string // original ref
	SHA     string // commit hash
	Message string // human-readable reason
}

LookupIssue describes a single dep that ReverseLookup could not resolve.

type MalformedNestedRefError added in v0.3.0 

type MalformedNestedRefError struct {
	Parent string
	Ref    string
}

MalformedNestedRefError is returned when a fetched composite's `uses:` names a remote action the parser can't accept. It is never skipped: the composite's dependencies would be locked without it.

func (*MalformedNestedRefError) Error added in v0.3.0 

func (e *MalformedNestedRefError) Error() string

type NestedUse added in v0.3.0 

type NestedUse struct {
	Ref      parserlock.ActionRef
	FetchRef string
}

NestedUse is an action to read: Ref as written, read at FetchRef when set.

func CompositeUses added in v0.3.0 

func CompositeUses(parent dep.Dependency, yml string) ([]NestedUse, error)

CompositeUses returns the actions a composite's manifest uses, and the uses that must block rather than be skipped. `./…` uses are skipped and reported as CompositeLocalPathError. parent is the composite at its commit. A manifest that isn't a composite uses nothing.

type Option 

type Option func(*Resolver)

Option configures a Resolver at construction time. Pass to New.

func WithNowFn 

func WithNowFn(fn func() time.Time) Option

WithNowFn overrides time.Now for rate-limit retry timing in tests.

func WithProfile 

func WithProfile(p *profile.Session) Option

WithProfile attaches profiling instrumentation.

func WithSleepFn 

func WithSleepFn(fn func(context.Context, time.Duration)) Option

WithSleepFn overrides the context-aware sleep used for rate-limit waits.

func WithTransport 

func WithTransport(t http.RoundTripper) Option

WithTransport overrides the HTTP transport. Use in tests with httpmock.

type ReachabilityStatus 

type ReachabilityStatus string

ReachabilityStatus represents the result of a commit reachability check. 

const (
	// Reachable means the SHA is confirmed on the ref's lineage.
	Reachable ReachabilityStatus = "reachable"
	// Unreachable means the SHA is confirmed NOT on the ref's lineage
	// (e.g. it exists only in a fork network).
	Unreachable ReachabilityStatus = "unreachable"
	// ReachabilityUnknown means the check could not be completed
	// (timeout, rate limit, API error).
	ReachabilityUnknown ReachabilityStatus = "unknown"
)

type Resolver 

type Resolver struct {

	// MaxRecursionDepth caps transitive composite action resolution depth.
	MaxRecursionDepth int

	// OnResolveProgress is called when a resolution batch makes progress.
	OnResolveProgress func(done, total int)

	// Pool is the shared worker pool for parallel resolution and reachability.
	Pool *pinpool.Pool
	// contains filtered or unexported fields
}

Resolver resolves action refs to commit SHAs.

func New 

func New(hostname string, pool *pinpool.Pool, opts ...Option) (*Resolver, error)

New creates a Resolver for the given hostname and pool. Use With* options to inject a test transport, profiling, or test overrides.

func (*Resolver) CheckAncestry 

func (r *Resolver) CheckAncestry(ctx context.Context, owner, repo, pinnedSHA, liveSHA string) (AncestryStatus, string)

CheckAncestry uses the Compare API to test whether pinnedSHA is an ancestor of liveSHA. This detects lockfile forgery: if someone injects a SHA that was never in the ref's lineage, merge_base(pinned, live) ≠ pinned.

func (*Resolver) CheckAncestryCause added in v0.3.0 

func (r *Resolver) CheckAncestryCause(ctx context.Context, owner, repo, pinnedSHA, liveSHA string) (AncestryStatus, string, error)

CheckAncestryCause is CheckAncestry that also returns the error behind a result the Compare API didn't answer: an AncestryUnknown outage, or an AncestryNotAncestor refusal such as a 401 or 403. Only a transient error leaves ancestry unknown; any other answer leaves the commit unproven.

func (*Resolver) ContainerImages added in v0.3.0 

func (r *Resolver) ContainerImages(refs []parserlock.ActionRef) []uses.Image

ContainerImages returns the unpinned images that refs and the composites they reach run, from manifests this resolver already read. Entries seeded from the lockfile carry no manifest and are skipped.

func (*Resolver) DiscoverContaining 

func (r *Resolver) DiscoverContaining(ctx context.Context, owner, repo, sha, hintRef string) (tag, branch string, err error)

hintRef may be empty (e.g. for bare-SHA pins). The repo's default branch is discovered automatically via GET /repos/{owner}/{repo} (cached).

func (*Resolver) DiscoverContainingDefault 

func (r *Resolver) DiscoverContainingDefault(ctx context.Context, owner, repo, sha, hintRef, defaultBranch string) (tag, branch string, err error)

DiscoverContainingDefault is DiscoverContaining with an explicit hint at the repository's default branch (e.g. "main"). When the discovered branch set contains defaultBranch it is preferred over lexicographic ordering.

Branch search is two-phase. Phase 1 validates the likely/canonical set directly (literal ref, recorded hint branch, default branch, protected branches, release/v* branches) so a relevant branch is never missed because it sorts beyond the paginated listing cap. Phase 2 — a full protected-first then all-branches scan — runs only when phase 1 finds nothing. An orphan error is returned only if both phases fail to place the commit.

func (*Resolver) FireResolveProgress 

func (r *Resolver) FireResolveProgress(done, total int)

FireResolveProgress fires OnResolveProgress. Safe from multiple goroutines.

func (*Resolver) GHClient 

func (r *Resolver) GHClient() *ghapi.Client

GHClient returns the unified API client.

func (*Resolver) GetBranchHead 

func (r *Resolver) GetBranchHead(ctx context.Context, owner, repo, name string) (ghapi.BranchHead, bool)

GetBranchHead looks up a single branch by name.

func (*Resolver) GetDefaultBranch 

func (r *Resolver) GetDefaultBranch(ctx context.Context, owner, repo string) string

GetDefaultBranch returns the default branch name for owner/repo.

func (*Resolver) Hostname 

func (r *Resolver) Hostname() string

Hostname returns the GitHub host the resolver is targeting.

func (*Resolver) IsKnownTagObject 

func (r *Resolver) IsKnownTagObject(owner, repo, sha string) bool

IsKnownTagObject reports whether (owner, repo, sha) is already cached as an annotated tag object. Cache-only — never issues a network call.

func (*Resolver) LatestRef 

func (r *Resolver) LatestRef(ctx context.Context, owner, repo string) (string, error)

LatestRef returns the highest stable tag for an action repository.

func (*Resolver) LikelyBranches 

func (r *Resolver) LikelyBranches(ctx context.Context, owner, repo, sha, ref, defaultBranch string) []ghapi.BranchHead

LikelyBranches assembles the high-trust candidate set validated before any full branch scan: the literal ref (when it is a branch), the recorded lockfile hint branch, the default branch, protected branches and release/v* branches. Deduplicated by name; order is most-trusted first.

func (*Resolver) ListBranches 

func (r *Resolver) ListBranches(ctx context.Context, owner, repo string) ([]ghapi.BranchHead, error)

ListBranches returns all branches for owner/repo.

func (*Resolver) ListProtectedBranches 

func (r *Resolver) ListProtectedBranches(ctx context.Context, owner, repo string) []ghapi.BranchHead

ListProtectedBranches returns branches with protection rules enabled.

func (*Resolver) ListReleaseBranches 

func (r *Resolver) ListReleaseBranches(ctx context.Context, owner, repo string) []ghapi.BranchHead

ListReleaseBranches returns release/v* branches (the canonical action publication branches) by matching heads/v and heads/release. Best-effort; cached per owner/repo.

func (*Resolver) ListTagsForRepo 

func (r *Resolver) ListTagsForRepo(ctx context.Context, owner, repo string) ([]ghapi.TagEntry, error)

ListTagsForRepo returns all tags for owner/repo.

func (*Resolver) MatchingHeadRefs 

func (r *Resolver) MatchingHeadRefs(ctx context.Context, owner, repo, prefix string) []ghapi.BranchHead

MatchingHeadRefs returns branches whose name starts with prefix.

func (*Resolver) PeelTagObject 

func (r *Resolver) PeelTagObject(ctx context.Context, owner, repo, sha string) (commit string, ok bool)

PeelTagObject reports whether sha is an annotated tag object in owner/repo and, if so, the commit SHA it dereferences to. Tag-of-tag chains are peeled server-side. Returns ok=false for lightweight tags, plain commits, unknown SHAs, or any lookup failure (fail open).

func (*Resolver) ReadManifests added in v0.3.0 

func (r *Resolver) ReadManifests(ctx context.Context, reqs []ghapi.ActionFileRequest) []ghapi.ActionFileResult

ReadManifests reads action.yml at each request's Ref. Results align with reqs and are not cached.

func (*Resolver) Redirect added in v0.2.0 

func (r *Resolver) Redirect(owner, repo string, orig parserlock.ActionRef, canonical string)

Redirect re-labels the entry seeded for owner/repo under its canonical name, keeping the locked commit: a rename of the same repository is no reason to advance. orig is the ref as written, which the rewrite must match exactly. Unseeded refs are left to live resolution.

func (*Resolver) RefNamesCommit added in v0.3.0 

func (r *Resolver) RefNamesCommit(ctx context.Context, owner, repo, name, sha string) (bool, error)

RefNamesCommit reports whether `uses: owner/repo@name` would run exactly sha: name is recordable and, looked up the way the Actions backend looks it up (tag first, then branch), points at sha now. Repairing a full-SHA `uses:` to a recorded ref goes through it, whether that ref was recorded as a tag or a branch.

func (*Resolver) RepoIDs 

func (r *Resolver) RepoIDs(ctx context.Context, hostname, owner, repo string) (int64, int64, error)

RepoIDs returns the numeric owner ID and repo ID for a NWO.

func (*Resolver) ResolveAllRecursive 

func (r *Resolver) ResolveAllRecursive(ctx context.Context, refs []parserlock.ActionRef) ([]dep.Dependency, dep.ParentMap, error)

ResolveAllRecursive resolves action refs and recursively discovers transitive dependencies from composite actions by reading their action.yml via GraphQL. The returned ParentMap (child dep key → parent dep keys) is owned by the caller and safe to mutate or hold across concurrent resolver calls.

func (*Resolver) ReverseLookup 

func (r *Resolver) ReverseLookup(ctx context.Context, deps []dep.Dependency) (map[string]string, []LookupIssue, error)

ReverseLookup leaves symbolic refs unchanged and reverse-lookups bare SHA refs via DiscoverContaining. For bare SHAs it populates dep.Tag and dep.Branch and computes the canonical @ref. Exact tags take precedence over branch heads. A containing branch remains metadata when its head differs from SHA, so historical pins on the same branch keep distinct refs. When the canonical ref differs from dep.Ref the change is recorded in the returned rewrites map and dep.Ref is updated in place.

Bare SHA deps with no containing ref are skipped and reported in the returned issues slice. Only transient/API errors are returned as err.

func (*Resolver) SeedBranchHints 

func (r *Resolver) SeedBranchHints(deps []dep.Dependency)

SeedBranchHints records a branch-of-record for each dep so subsequent containing-branch scans try that branch first. Hints from a previous lockfile are advisory: a miss falls through to a full branch scan.

func (*Resolver) SeedFromLockfile 

func (r *Resolver) SeedFromLockfile(deps []dep.Dependency)

SeedFromLockfile pre-warms the resolution cache so repeat runs skip redundant API calls. Do NOT call with --relock: seeding would hide ref movement.

func (*Resolver) SeedHosts added in v0.2.0 

func (r *Resolver) SeedHosts(deps []dep.Dependency) error

SeedHosts binds recorded repositories before caches or network work begin.

func (*Resolver) Seeded added in v0.3.0 

func (r *Resolver) Seeded(ref parserlock.ActionRef) bool

Seeded reports whether ref resolved from a lockfile seed rather than a live read, so nothing has checked its manifest this run.

Source Files

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