{"record":{"id":"f116733e25525b31","repo":"GoogleContainerTools/skaffold","slug":"getting-tagger-w","errorCode":null,"errorMessage":"getting tagger: %w","messagePattern":"getting tagger: %w","errorType":"console","errorClass":null,"httpStatus":null,"severity":"error","filePath":"cmd/skaffold/app/cmd/diagnose.go","lineNumber":113,"sourceCode":"\t}\n\tbuf, err := yaml.MarshalWithSeparator(configs)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"marshalling configuration: %w\", err)\n\t}\n\n\tout.Write(buf)\n\n\treturn nil\n}\n\nfunc printArtifactDiagnostics(ctx context.Context, out io.Writer, configs []schemaUtil.VersionedConfig) error {\n\trunCtx, err := getRunContext(ctx, opts, configs)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"getting run context: %w\", err)\n\t}\n\ttagger, err := tag.NewTaggerMux(runCtx)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"getting tagger: %w\", err)\n\t}\n\timageTags, err := deployutil.ImageTags(ctx, runCtx, tagger, out, runCtx.Artifacts())\n\tif err != nil {\n\t\treturn fmt.Errorf(\"getting tags: %w\", err)\n\t}\n\tfor _, c := range configs {\n\t\tconfig := c.(*latest.SkaffoldConfig)\n\t\tfmt.Fprintln(out, \"Skaffold version:\", version.Get().GitCommit)\n\t\tfmt.Fprintln(out, \"Configuration version:\", config.APIVersion)\n\t\tfmt.Fprintln(out, \"Number of artifacts:\", len(config.Build.Artifacts))\n\t\tif err := diagnose.CheckArtifacts(ctx, runCtx, imageTags, out); err != nil {\n\t\t\treturn fmt.Errorf(\"running diagnostic on artifacts: %w\", err)\n\t\t}\n\n\t\toutput.Blue.Fprintln(out, \"\\nConfiguration\")\n\t}\n\treturn nil\n}","sourceCodeStart":95,"sourceCodeEnd":131,"githubUrl":"https://github.com/GoogleContainerTools/skaffold/blob/a1189de023efc32d4b8e11f395acc678aa555011/cmd/skaffold/app/cmd/diagnose.go#L95-L131","documentation":"Wraps a tag.NewTaggerMux failure in printArtifactDiagnostics during `skaffold diagnose`. The tagger mux combines configured tag policies (gitCommit, envTemplate, sha256, dateTime, custom); construction fails when a tagger's arguments are invalid — most commonly an unparseable envTemplate tag template or misconfigured custom tagger.","triggerScenarios":"`skaffold diagnose` builds the tagger via tag.NewTaggerMux(runCtx) and returns err because one of the build.artifacts tag policies is invalid, e.g. envTemplate with a malformed Go template.","commonSituations":"skaffold.yaml sets `tagPolicy: envTemplate: template: \"{{.BAD\" (unclosed template); custom tagger referencing a missing command; recent skaffold version removed/renamed a tagger field.","solutions":["Fix the tag policy in skaffold.yaml — validate template syntax for envTemplate (balanced {{ }})","Switch to a simple tagger (e.g. sha256 or gitCommit) to confirm the tagger is the culprit","Check the custom tagger command exists and is executable","Upgrade/downgrade skaffold to match the schema version of the tag policy fields"],"exampleFix":"# before\nbuild:\n  tagPolicy:\n    envTemplate:\n      template: \"{{.IMAGE}}-{{.TAG\"\n# after\nbuild:\n  tagPolicy:\n    envTemplate:\n      template: \"{{.IMAGE}}-{{.TAG}}\"","handlingStrategy":"validation","validationCode":"# validate the tag template before running\npython3 - <<'EOF'\nimport sys\nt = \"{{.IMAGE}}-{{.TAG}}\"\nassert t.count(\"{{\") == t.count(\"}}\"), \"unbalanced template braces\"\nEOF","typeGuard":null,"tryCatchPattern":"if err := run(); err != nil {\n    if strings.Contains(err.Error(), \"getting tagger:\") {\n        // inspect build.tagPolicy in skaffold.yaml\n    }\n}","preventionTips":["Keep envTemplate templates balanced and test with `skaffold diagnose` after edits","Prefer sha256/gitCommit taggers unless templating is required","Check skaffold release notes for tagger field changes before upgrading"],"tags":["skaffold","tagging","config"],"backgroundTag":"invalid-tag-template","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"}