Check committed file sizes

internal/validation/validation.go

@@ -21,6 +21,13 @@ type Settings struct {
 	CompileTargets     []Target
 	GoFormat           bool
 	ModuleDistribution ModuleDistributionSettings
+	FileSize           *FileSizeSettings
+}
+
+// FileSizeSettings selects a per-blob limit and literal path exclusions.
+type FileSizeSettings struct {
+	LimitBytes *int64
+	Exclusions []string
 }
 
 // ModuleDistributionSettings selects candidate distribution checks.
@@ -51,6 +58,12 @@ func (request Request) ReadCandidateTree(ctx context.Context) (*CandidateTree, e
 
 // Run executes shared validation for the captured candidate.
 func Run(ctx context.Context, request Request) error {
+	if request.Settings.FileSize != nil && request.Settings.FileSize.LimitBytes != nil && *request.Settings.FileSize.LimitBytes < 0 {
+		return &Failure{
+			Check:    FileSize,
+			Findings: []Finding{{Message: "file size limit must not be negative"}},
+		}
+	}
 	for _, target := range request.Settings.CompileTargets {
 		if strings.TrimSpace(target.OS) == "" || strings.TrimSpace(target.Arch) == "" || strings.Contains(target.OS, "/") || strings.Contains(target.Arch, "/") {
 			return &Failure{
@@ -99,10 +112,13 @@ func Run(ctx context.Context, request Request) error {
 			}
 		}
 	}
-	if request.Settings.GoFormat || request.Settings.ModuleDistribution.WorkspaceFiles || request.Settings.ModuleDistribution.LocalReplacements {
+	if request.Settings.GoFormat || request.Settings.ModuleDistribution.WorkspaceFiles || request.Settings.ModuleDistribution.LocalReplacements || request.Settings.FileSize != nil {
 		tree, err := request.ReadCandidateTree(ctx)
 		if err != nil {
-			check := LocalReplacements
+			check := FileSize
+			if request.Settings.ModuleDistribution.LocalReplacements {
+				check = LocalReplacements
+			}
 			if request.Settings.ModuleDistribution.WorkspaceFiles {
 				check = WorkspaceFiles
 			}
@@ -126,6 +142,11 @@ func Run(ctx context.Context, request Request) error {
 				return err
 			}
 		}
+		if request.Settings.FileSize != nil {
+			if err := checkFileSize(tree, request.Settings.FileSize); err != nil {
+				return err
+			}
+		}
 	}
 	return nil
 }