internal/pkg: rename inputs method

Inputs is more correct than dependencies in the current terminology.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/pkg/pkg.go

@@ -330,8 +330,8 @@ func (c *common) Open(a Artifact) (r io.ReadCloser, err error) {
 type FContext struct {
 	TContext
 
-	// Cured top-level dependencies looked up by Pathname.
-	deps map[Artifact]cureRes
+	// Cured top-level inputs looked up by Pathname.
+	inputs map[Artifact]cureRes
 }
 
 // linkSubstitute links status for substitute if populated.
@@ -373,7 +373,7 @@ func (f *FContext) GetArtifact(a Artifact) (
 	pathname *check.Absolute,
 	checksum unique.Handle[Checksum],
 ) {
-	if res, ok := f.deps[a]; ok {
+	if res, ok := f.inputs[a]; ok {
 		return res.pathname, res.checksum
 	}
 	panic(InvalidLookupError(f.cache.Ident(a).Value()))
@@ -405,13 +405,13 @@ type Artifact interface {
 	// Result must remain identical across multiple invocations.
 	Params(ctx *IContext)
 
-	// Dependencies returns a slice of [Artifact] that the current instance
-	// depends on to produce its contents.
+	// Inputs returns a slice of [Artifact] the current instance has access to
+	// while producing its output.
 	//
 	// Callers must not modify the retuned slice.
 	//
 	// Result must remain identical across multiple invocations.
-	Dependencies() []Artifact
+	Inputs() []Artifact
 
 	// IsExclusive returns whether the [Artifact] is exclusive. Exclusive
 	// artifacts might not run in parallel with each other, and are still
@@ -2180,15 +2180,15 @@ func (c *Cache) cure(a Artifact, curesExempt bool) (
 		break
 
 	case FloodArtifact:
-		deps := a.Dependencies()
-		f := FContext{t, make(map[Artifact]cureRes, len(deps))}
+		inputs := a.Inputs()
+		f := FContext{t, make(map[Artifact]cureRes, len(inputs))}
 
 		var wg sync.WaitGroup
-		wg.Add(len(deps))
-		res := make([]cureRes, len(deps))
-		errs := make(DependencyCureError, 0, len(deps))
+		wg.Add(len(inputs))
+		res := make([]cureRes, len(inputs))
+		errs := make(DependencyCureError, 0, len(inputs))
 		var errsMu sync.Mutex
-		for i, d := range deps {
+		for i, d := range inputs {
 			pending := pendingArtifactDep{d, &res[i], &errs, &errsMu, &wg}
 			go pending.cure(c)
 		}
@@ -2199,11 +2199,11 @@ func (c *Cache) cure(a Artifact, curesExempt bool) (
 			return
 		}
 		for i, p := range res {
-			f.deps[deps[i]] = p
+			f.inputs[inputs[i]] = p
 		}
 
 		sh := sha512.New384()
-		err = c.encode(sh, a, f.deps)
+		err = c.encode(sh, a, f.inputs)
 		if err != nil {
 			return
 		}
@@ -2697,6 +2697,8 @@ func IsCollected(err error) bool { return errors.As(err, new(Collected)) }
 // [pkg.Artifact]. It returns [Collected].
 type Collect []Artifact
 
+var _ Artifact = new(Collect)
+
 // Cure returns [Collected].
 func (*Collect) Cure(*FContext) error { return Collected{} }
 
@@ -2706,8 +2708,8 @@ func (*Collect) Kind() Kind { return kindCollection }
 // Params is a noop: dependencies are already represented in the header.
 func (*Collect) Params(*IContext) {}
 
-// Dependencies returns [Collect] as is.
-func (c *Collect) Dependencies() []Artifact { return *c }
+// Inputs returns [Collect] as is.
+func (c *Collect) Inputs() []Artifact { return *c }
 
 // IsExclusive returns false: Cure is a noop.
 func (*Collect) IsExclusive() bool { return false }