{"record":{"id":"debe98c4f5ea2c79","repo":"GoogleContainerTools/skaffold","slug":"opening-file-for-writing-manifests-w","errorCode":null,"errorMessage":"opening file for writing manifests: %w","messagePattern":"opening file for writing manifests: %w","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"pkg/skaffold/kubernetes/manifest/util.go","lineNumber":67,"sourceCode":"\t\tdefer os.RemoveAll(tempDir)\n\t\ttempFile := filepath.Join(tempDir, renderedManifestsStagingFile)\n\t\tif err := dumpToFile(manifests, tempFile); err != nil {\n\t\t\treturn err\n\t\t}\n\t\tgcs := client.Native{}\n\t\tif err := gcs.UploadFile(context.Background(), tempFile, output); err != nil {\n\t\t\treturn writeErr(fmt.Errorf(\"failed to copy rendered manifests to GCS: %w\", err))\n\t\t}\n\t\treturn nil\n\tdefault:\n\t\treturn dumpToFile(manifests, output)\n\t}\n}\n\nfunc dumpToFile(manifests string, filepath string) error {\n\tf, err := os.Create(filepath)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"opening file for writing manifests: %w\", err)\n\t}\n\tdefer f.Close()\n\t_, err = f.WriteString(manifests + \"\\n\")\n\treturn err\n}\n","sourceCodeStart":49,"sourceCodeEnd":73,"githubUrl":"https://github.com/GoogleContainerTools/skaffold/blob/a1189de023efc32d4b8e11f395acc678aa555011/pkg/skaffold/kubernetes/manifest/util.go#L49-L73","documentation":"dumpToFile writes the rendered manifest string to the requested output path via os.Create. If the file cannot be created (bad path, permission denied, path is a directory), the error is wrapped as 'opening file for writing manifests'.","triggerScenarios":"Calling Write with a local file output (default branch) or dumpToFile directly, when os.Create fails: parent directory missing, no write permission, or output path is an existing directory.","commonSituations":"skaffold render -o pointing to a nonexistent directory; writing to a read-only mount; passing a directory instead of a file path.","solutions":["Create the output's parent directory (mkdir -p) or correct a typo in the -o path","Ensure the target is a file, not a directory, and the user has write permission","Move the output to a writable location if on a read-only mount"],"exampleFix":"// before\nskaffold render -o /missing/dir/out.yaml\n// after\nmkdir -p out && skaffold render -o out/rendered.yaml","handlingStrategy":"validation","validationCode":"dir := filepath.Dir(output)\nif st, err := os.Stat(dir); err != nil || !st.IsDir() {\n    return fmt.Errorf(\"output dir %q missing\", dir)\n}\nif st, err := os.Stat(output); err == nil && st.IsDir() {\n    return fmt.Errorf(\"output %q is a directory\", output)\n}","typeGuard":null,"tryCatchPattern":"if err != nil {\n    var pe *fs.PathError\n    if errors.As(err, &pe) && errors.Is(pe.Err, os.ErrPermission) {\n        // choose a writable output path\n    }\n    return err\n}","preventionTips":["mkdir -p the output directory before skaffold render -o","Pass a file path, never a directory, to -o","Keep render outputs on writable volumes"],"tags":["filesystem","io","output"],"backgroundTag":"file-create-permission-denied","analyzedSha":"a1189de023efc32d4b8e11f395acc678aa555011","analyzedAt":"2026-09-05T12:09:27.064Z","contentChangedAt":"2026-09-05T12:09:27.064Z","schemaVersion":2},"datasetVersion":"2026-09-12T17:17:11.597Z"}