{"record":{"id":"de3fefe024e69608","repo":"jackwener/OpenCLI","slug":"dockerhub-image-input-name-must-be-2-255-char","errorCode":null,"errorMessage":"dockerhub image \"${input}\" name must be 2-255 chars","messagePattern":"dockerhub image \"(.+?)\" name must be 2-255 chars","errorType":"validation","errorClass":"ArgumentError","httpStatus":null,"severity":"error","filePath":"clis/dockerhub/utils.js","lineNumber":62,"sourceCode":"    const slash = raw.indexOf('/');\n    let owner;\n    let name;\n    if (slash >= 0) {\n        owner = raw.slice(0, slash);\n        name = raw.slice(slash + 1);\n    }\n    else {\n        owner = 'library';\n        name = raw;\n    }\n    if (!SLUG.test(owner) || !SLUG.test(name)) {\n        throw new ArgumentError(\n            `dockerhub image \"${input}\" is not a valid repository slug`,\n            'Use lowercase letters / digits / \"._-\", optionally prefixed with \"<owner>/\".',\n        );\n    }\n    if (name.length < 2 || name.length > 255) {\n        throw new ArgumentError(\n            `dockerhub image \"${input}\" name must be 2-255 chars`,\n        );\n    }\n    return { owner, name };\n}\n\nexport async function hubFetch(url, label) {\n    let resp;\n    try {\n        resp = await fetch(url, { headers: { 'user-agent': UA, accept: 'application/json' } });\n    }\n    catch (err) {\n        throw new CommandExecutionError(\n            `${label} request failed: ${err?.message ?? err}`,\n            'Check that hub.docker.com is reachable from this network.',\n        );\n    }\n    if (resp.status === 404) {","sourceCodeStart":44,"sourceCodeEnd":80,"githubUrl":"https://github.com/jackwener/OpenCLI/blob/49907e53dc3ade5c223ff0c4c2c2785687cec4e6/clis/dockerhub/utils.js#L44-L80","documentation":"After slug validation, parseImage enforces Docker Hub's repository-name length rule of 2-255 characters. This ArgumentError is thrown when the parsed name part is a single character or longer than 255 chars.","triggerScenarios":"Passing a single-character image name like --image a (becomes library/a, name length 1); passing an extremely long generated name over 255 chars.","commonSituations":"Short test names in scripts; programmatically generated slugs that exceed 255 chars; forgetting that bare single-letter names get 'library/' owner and still fail on the name part.","solutions":["Use an image name of at least 2 characters","Truncate or fix over-long generated names to <= 255 chars","If targeting a 1-char repo, note Docker Hub itself disallows it, so use a valid repo"],"exampleFix":"// before\ndockerhub info --image 'a'\n// after\ndockerhub info --image 'library/ab'","handlingStrategy":"validation","validationCode":"const name = args.image.includes('/') ? args.image.split('/')[1] : args.image; if (name.length < 2 || name.length > 255) throw new Error('repo name must be 2-255 chars');","typeGuard":"function hasValidNameLength(s) { const name = s.includes('/') ? s.slice(s.indexOf('/')+1) : s; return name.length >= 2 && name.length <= 255; }","tryCatchPattern":"try { await info(args); } catch (e) { if (e instanceof ArgumentError && e.message.includes('2-255 chars')) { console.error('Repo name must be 2-255 characters'); process.exitCode = 2; } else throw e; }","preventionTips":["Use repo names of at least 2 characters","Enforce a 255-char cap on generated names","Validate name length before calling the CLI"],"tags":["argument-validation","image-parsing","length","dockerhub"],"backgroundTag":"invalid-parameter-value","analyzedSha":"49907e53dc3ade5c223ff0c4c2c2785687cec4e6","analyzedAt":"2026-08-29T08:14:47.543Z","schemaVersion":2},"datasetVersion":"2026-08-29T12:17:43.993Z"}