{"record":{"id":"03848c21809bdec3","repo":"laurent22/joplin","slug":"you-are-in-a-detached-head-state-checkout-a-branc","errorCode":null,"errorMessage":"You are in a detached HEAD state. Checkout a branch (e.g. git checkout main) and push before publishing.","messagePattern":"You are in a detached HEAD state\\. Checkout a branch \\(e\\.g\\. git checkout main\\) and push before publishing\\.","errorType":"exception","errorClass":"Error","httpStatus":null,"severity":"error","filePath":"packages/generator-joplin/generators/app/templates/script/publish/steps/verifyGitState.ts","lineNumber":44,"sourceCode":"\tconst status = await runGit('git status --porcelain', 'Failed to check git status. Ensure git is installed and configured.');\n\tif (status !== '') {\n\t\tthrow new Error('You have uncommitted changes. Please commit or stash them before publishing.');\n\t}\n\tlogger.success('Working tree is clean.');\n\n\t// Gets the current latest local commit hash\n\tconst commitHash = await runGit('git rev-parse HEAD', 'Could not get commit hash. Ensure you are in a valid Git repository with at least one commit.');\n\tif (commitHash.length !== 40) {\n\t\tthrow new Error('Failed to extract a valid commit hash. Ensure that git is properly initialized and you have made at least one local commit (git commit) before publishing.');\n\t}\n\tlogger.success(`Commit hash extracted: ${commitHash}`);\n\n\t// check if the local project is linked to github\n\tawait runGit('git remote get-url origin', 'No remote named \\'origin\\' found. Make sure your plugin repository is hosted on GitHub.');\n\n\tconst currentBranch = await runGit('git rev-parse --abbrev-ref HEAD', 'Failed to retrieve current branch name. Ensure git is configured correctly.');\n\tif (currentBranch === 'HEAD') {\n\t\tthrow new Error('You are in a detached HEAD state. Checkout a branch (e.g. git checkout main) and push before publishing.');\n\t}\n\n\tconst remoteHeadLine = await runGit(`git ls-remote origin ${currentBranch}`, 'Could not retrieve remote HEAD. Make sure you have pushed your changes and have an internet connection.');\n\tif (!remoteHeadLine) {\n\t\tthrow new Error('Remote HEAD is empty. Make sure you have pushed your changes.');\n\t}\n\n\tconst parts = remoteHeadLine.split('\\n')[0].split(/\\s+/);\n\tif (parts.length < 2) {\n\t\tthrow new Error(`Unexpected git ls-remote output: \"${remoteHeadLine}\". Make sure your git remote and branch are configured correctly.`);\n\t}\n\n\tconst remoteHash = parts[0];\n\tif (remoteHash.length !== 40) {\n\t\tthrow new Error('Failed to extract a valid remote commit hash.');\n\t}\n\n\tif (remoteHash !== commitHash) {","sourceCodeStart":26,"sourceCodeEnd":62,"githubUrl":"https://github.com/laurent22/joplin/blob/2654b33620775080d1d59c552259d41e33dad3d2/packages/generator-joplin/generators/app/templates/script/publish/steps/verifyGitState.ts#L26-L62","documentation":"Thrown by verifyGitState when `git rev-parse --abbrev-ref HEAD` returns the literal string 'HEAD', which is git's signal that the repository is in detached HEAD state (HEAD points directly at a commit SHA rather than a branch ref). Publishing from a detached HEAD is blocked because there is no branch to push and to sync against the remote.","triggerScenarios":"The user checked out a specific commit SHA: git checkout <sha>; a rebase in progress left HEAD detached; CI checked out a ref that resolved to a detached HEAD (e.g. actions/checkout without a branch); the repo was cloned then a tag was checked out.","commonSituations":"CI pipeline using actions/checkout@v2 which defaults to detached HEAD; developer inspecting an old commit then running publish; post-rebase before re-checking out the branch; checking out a tag for a release.","solutions":["Checkout a branch: git checkout main (or master), then git push.","In CI, configure the checkout to persist on a branch, or create a temporary branch: git switch -c publish-branch before publishing.","If mid-rebase, complete or abort the rebase first."],"exampleFix":"# before\ngit checkout 1a2b3c4\n npm run publish\n# after\ngit checkout main && git push\n npm run publish","handlingStrategy":"validation","validationCode":"const branch = execSync('git rev-parse --abbrev-ref HEAD', { encoding: 'utf8' }).trim();\nif (branch === 'HEAD') {\n  throw new Error('Detached HEAD. Run: git checkout main');\n}","typeGuard":"function isOnBranch(b) { return b !== 'HEAD' && b.length > 0; }","tryCatchPattern":null,"preventionTips":["Always publish from a named branch, not a detached HEAD.","In CI, create a branch before publishing if the checkout is detached."],"tags":["plugin-publish","git","generator-joplin","ci"],"backgroundTag":null,"analyzedSha":"2654b33620775080d1d59c552259d41e33dad3d2","analyzedAt":"2026-08-12T14:26:46.263Z","schemaVersion":2},"datasetVersion":"2026-08-12T18:17:37.767Z"}