internal/pkg: use correct artifact count

This updates buffer sizes and counters to use correct total artifact count.

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

internal/pkg/exec.go

@@ -224,6 +224,11 @@ func (a *execArtifact) cure(c *CureContext, hostNet bool) (err error) {
 		paths[i].src = make([]*check.Absolute, len(p.A))
 	}
 
+	var artifactCount int
+	for _, p := range a.paths {
+		artifactCount += len(p.A)
+	}
+
 	if len(paths) > 0 {
 		type cureArtifact struct {
 			// Index of pending Artifact in paths.
@@ -231,7 +236,7 @@ func (a *execArtifact) cure(c *CureContext, hostNet bool) (err error) {
 			// Pending artifact.
 			a Artifact
 		}
-		ac := make(chan cureArtifact, len(paths))
+		ac := make(chan cureArtifact, artifactCount)
 		for i, p := range a.paths {
 			for j, d := range p.A {
 				ac <- cureArtifact{[2]int{i, j}, d}
@@ -265,7 +270,7 @@ func (a *execArtifact) cure(c *CureContext, hostNet bool) (err error) {
 		}
 
 		var count int
-		errs := make([]error, 0, len(paths))
+		errs := make([]error, 0, artifactCount)
 		for cr := range res {
 			count++
 
@@ -275,7 +280,7 @@ func (a *execArtifact) cure(c *CureContext, hostNet bool) (err error) {
 				paths[cr.index[0]].src[cr.index[1]] = cr.pathname
 			}
 
-			if count == len(paths) {
+			if count == artifactCount {
 				break
 			}
 		}