{"record":{"id":"471755a48078ddc2","repo":"GoogleContainerTools/skaffold","slug":"writing-config-file-w","errorCode":null,"errorMessage":"writing config file: %w","messagePattern":"writing config file: %w","errorType":"console","errorClass":null,"httpStatus":null,"severity":"error","filePath":"cmd/skaffold/app/cmd/fix.go","lineNumber":136,"sourceCode":"\tif err != nil {\n\t\treturn fmt.Errorf(\"marshaling new config: %w\", err)\n\t}\n\tif outFile != \"\" {\n\t\tvar writeErr error\n\t\tif overwrite {\n\t\t\toldCfg, readErr := os.ReadFile(configFile)\n\t\t\tif readErr != nil {\n\t\t\t\treturn fmt.Errorf(\"reading config file: %w\", readErr)\n\t\t\t}\n\t\t\tnewFile := fmt.Sprintf(\"%s.v2\", outFile)\n\n\t\t\twriteErr = os.WriteFile(newFile, oldCfg, 0644)\n\t\t\tif writeErr == nil {\n\t\t\t\toutput.Default.Fprintln(out, \"Backed up previous skaffold.yaml at \", newFile)\n\t\t\t}\n\t\t}\n\t\tif err := os.WriteFile(outFile, newCfg, 0644); err != nil {\n\t\t\treturn fmt.Errorf(\"writing config file: %w\", err)\n\t\t}\n\t\toutput.Default.Fprintf(out, \"New config at version %s generated and written to %s\\n\", toVersion, outFile)\n\t\tif writeErr != nil {\n\t\t\toutput.Yellow.Fprintln(out, \"Error moving old config. Dumping old v2 config on stdout:\")\n\t\t\toutput.Default.Fprintln(out, getOldConfigYaml(versionedCfgs))\n\t\t}\n\t} else {\n\t\tout.Write(newCfg)\n\t}\n\treturn nil\n}\n\nfunc getOldConfigYaml(cfgs []util.VersionedConfig) string {\n\tyamlStr, err := yaml.MarshalWithSeparator(cfgs)\n\tif err != nil {\n\t\treturn fmt.Sprintf(\"marshaling old config: %v\", err)\n\t}\n\treturn string(yamlStr)","sourceCodeStart":118,"sourceCodeEnd":154,"githubUrl":"https://github.com/GoogleContainerTools/skaffold/blob/a1189de023efc32d4b8e11f395acc678aa555011/cmd/skaffold/app/cmd/fix.go#L118-L154","documentation":"After backing up (if --overwrite) and generating the upgraded YAML, `skaffold fix` writes the new config with os.WriteFile(outFile, newCfg, 0644). This error wraps a write failure — the fix result was produced but could not be persisted to disk. Note: if the earlier backup write also failed, fix dumps the old v2 config to stdout as a fallback.","triggerScenarios":"`os.WriteFile(outFile, ...)` fails: the output path is in a read-only directory, the disk is full, an existing output file is not writable, or outFile's parent directory does not exist.","commonSituations":"Using `--output` pointing to a non-existent directory; running in a container/CI where the workspace is mounted read-only; overwriting skaffold.yaml owned by root while running as a non-root user; full disk on a dev machine.","solutions":["Check the output path's parent directory exists and is writable (`ls -ld $(dirname <outFile>)`).","Fix permissions on the target file/directory or run with a user that can write it.","Free disk space if the filesystem is full.","Note the fallback: the old v2 config is printed to stdout when the backup move failed — capture stdout and save it manually."],"exampleFix":"// before: output directory does not exist\nskaffold fix --output ./build/skaffold.yaml\n// after\nmkdir -p ./build\nskaffold fix --output ./build/skaffold.yaml\n","handlingStrategy":"validation","validationCode":"// Ensure the output destination is writable before running skaffold fix\nconst fs = require('fs');\nconst out = process.env.OUT_FILE ?? 'skaffold.fixed.yaml';\nfs.mkdirSync(require('path').dirname(out), {recursive: true});\nfs.accessSync(require('path').dirname(out), fs.constants.W_OK);\nif (fs.existsSync(out)) fs.accessSync(out, fs.constants.W_OK);","typeGuard":null,"tryCatchPattern":"try {\n  execFileSync('skaffold', ['fix', '--output', outFile]);\n} catch (e) {\n  const msg = e.stderr?.toString() ?? '';\n  if (msg.includes('writing config file')) {\n    console.error(`Could not write ${outFile}; check dir existence, permissions, and disk space.`);\n    // capture stdout, where fix may dump the old config\n    console.error(e.stdout?.toString() ?? '');\n  } else throw e;\n}","preventionTips":["Create the output directory before writing configs there.","In CI/containers, verify the workspace mount is not read-only.","Check free disk space in pipelines that write generated configs.","Fix file ownership (e.g. files created by root in previous runs) before overwriting."],"tags":["skaffold","file-io","permissions","config"],"backgroundTag":"file-write-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"}