\n GitHubSync\n
Sync vals from Val Town to GitHub and back
\n

\n View source\n \n ,\n );\n}",[],[153,184],{"_107":193,"_100":194,"_154":195,"_156":155,"_157":141,"_158":196,"_160":161,"_109":197,"_104":198,"_164":178,"_166":199,"_167":27,"_168":-5,"_169":200,"_103":201},"67b789cc-e58b-11ef-94ab-e6cdfca9ef9f","middleware","1214684e-e56f-11ef-a5a5-e6cdfca9ef9f",142,["D",1738957237500],24,"import { Webhooks } from \"npm:@octokit/webhooks\";\nimport { Context, Hono, Next } from \"npm:hono\";\nimport signWebhook from \"../sign-webhook\";\n\n\nexport const verifyGitHubSignature = (secret: string) => {\n const webhooks = new Webhooks({ secret });\n \n return async (c: Context, next: Next) => {\n const signature = c.req.header(\"x-hub-signature-256\");\n if (!signature) {\n console.error(\"Missing GitHub secret\");\n c.status(401);\n return c.body(\"Unauthorized\");\n }\n\n // const body = await c.req.json();\n const text = await c.req.text();\n // const body = await JSON.parse(text);\n\n if (!(await webhooks.verify(text, signature))) {\n console.error(\"Invalid GitHub secret\");\n c.status(401);\n return c.body(\"Unauthorized\");\n }\n\n console.log(\"GitHub secret verified\");\n await next();\n };\n};\n\n// Middleware for signature verification\nexport const verifyValSignature = (secret: string) => {\n return async (c: Context, next: Next) => {\n console.log(\"verifyValSignature\");\n const signature = c.req.header(\"x-val-signature\");\n if (!signature) {\n console.error(\"Missing signature\");\n return c.text(\"Missing signature\", 401);\n }\n\n const text = await c.req.text();\n const expectedSignature = await signWebhook(text, secret);\n\n if (signature !== expectedSignature) {\n console.error(\"Invalid signature\");\n return c.text(\"Invalid signature\", 401);\n }\n\n console.log(\"webhook secret verified\");\n await next();\n };\n};",[],[153,194],{"_107":203,"_100":204,"_154":205,"_156":155,"_157":141,"_158":206,"_160":161,"_109":207,"_104":208,"_164":178,"_166":209,"_167":27,"_168":-5,"_169":210,"_103":211},"1afecca8-e56d-11ef-83c7-e6cdfca9ef9f","styles","e7baa34a-e56b-11ef-b737-e6cdfca9ef9f",44,["D",1738944223879],8,"export const body = {\n fontFamily: \"sans-serif\",\n margin: 0,\n padding: 32,\n lineHeight: 1.5,\n color: \"black\",\n backgroundColor: \"white\",\n};\n\nexport const title = {\n fontSize: 48,\n};\n\nexport const description = {\n fontSize: 16,\n fontWeight: \"normal\",\n};",[],[153,204],{"_107":213,"_100":214,"_154":215,"_156":155,"_157":141,"_158":216,"_160":161,"_109":217,"_104":218,"_164":178,"_166":219,"_167":27,"_168":-5,"_169":220,"_103":221},"b6d9515e-e58e-11ef-9bb7-e6cdfca9ef9f","valtown-deploy","31e417ca-e56d-11ef-b96f-e6cdfca9ef9f",158,["D",1738958658748],33,"import { decodeBase64 } from \"jsr:@std/encoding/base64\";\nimport { ValTown } from \"npm:@valtown/sdk\";\nimport { Octokit } from \"npm:@octokit/rest\";\nimport config from \"../config.json\" with { type: \"json\" };\n\nimport type { Context, Next } from \"npm:hono\";\n\nconst GITHUB_TOKEN = Deno.env.get(\"GITHUB_TOKEN\");\nconst VALTOWN_TOKEN = Deno.env.get(\"VALTOWN_TOKEN\");\n\nconst valtown = new ValTown({\n bearerToken: VALTOWN_TOKEN,\n});\nconst octokit = new Octokit({ auth: GITHUB_TOKEN });\nconst td = new TextDecoder();\n\n////\n\nexport default async function valTownDeploy(c: Context) {\n console.log(\"deploy to valtown\");\n const body = await c.req.json();\n const { ref, repository, after, commits } = body;\n\n if (ref !== config.branch) {\n console.log(`Update not on ${config.branch} branch (${ref})`);\n return c.json({ ok: true });\n }\n\n try {\n const updates = await getContents(repository, after, commits);\n console.log(`${updates.length} updates`);\n const user = await valtown.me.profile.retrieve();\n if (!user.username) {\n throw new Error(\"User not found: check your VALTOWN_TOKEN\");\n }\n console.log(\"got val.town user:\", user.username);\n await updateVals(user, updates);\n } catch (e) {\n console.error(e);\n c.status(500);\n return c.body(\"Error updating vals\");\n }\n\n return c.json({ ok: true });\n}\n\nasync function getContents(repo: Repo, after: string, commits: Commit[]) {\n const filenames = config.vals.map((name: string) => name + \".tsx\");\n console.log(`${filenames.length} val files updated`);\n const modified = getModified(commits, filenames);\n console.log(`${modified.length} modifications in commit`);\n const contents = await Promise.all(modified.map(getFileContent(repo, after)));\n console.log(`${contents.length} file contents`);\n return contents;\n}\n\nfunction getModified(commits: Commit[], filenames: string[]) {\n return commits.reduce((a: string[], b: Commit) => {\n return [...a, ...b.modified];\n }, []).filter((file: string) => filenames.includes(file));\n}\n\nfunction getFileContent(repo: Repo, after: string) {\n return async (path: string): Promise<{\n name: string;\n code: string;\n }> => {\n const { data } = await octokit.repos.getContent({\n owner: repo.owner.name,\n repo: repo.name,\n path,\n ref: after,\n });\n const [name] = path.split(\".\");\n const code = td.decode(decodeBase64(data.content));\n return {\n name,\n code,\n };\n };\n}\n\nasync function updateVals(user: ValUser, updates: { name: string; code: string; }[]) {\n console.log(\"updateVals\");\n await Promise.all(updates.map(async (update) => {\n updateVal(user.username, update)\n }));\n}\n\nasync function updateVal(username: string, update: { name: string; code: string; }) {\n const { name, code } = update;\n const val = await valtown.alias.username.valName.retrieve(username, name);\n console.log(\"updateVal\", { name, id: val.id });\n const ver = await valtown.vals.versions.create(val.id, { code });\n console.log(\"updated val:\", ver);\n}\n\n////\n\ntype Repo = {\n owner: {\n name: string;\n };\n name: string;\n};\ntype Commit = {\n modified: string[];\n};\ntype ValUser = {\n username: string;\n};",[],[153,214],[153],{"_107":224,"_100":225,"_154":121,"_156":-5,"_157":141,"_158":140,"_160":161,"_109":226,"_104":227,"_164":228,"_166":229,"_167":27,"_168":-5,"_169":230,"_103":231},"7c573ce8-f949-11ef-8e39-569c3dd06744","README.md",["D",1741127948569],39,"file","# GitHubSync\n\nWebhook to commit vals to GitHub and sync code from GitHub back to Val Town\n\n## Demo\n\nThis [example val][] is synced to this [GitHub repo][]\n\n## How to set up\n\nThis val exposes two webhook endpoints:\n\n- `/push` will copy the contents from a list of vals specified in `config.json` and push them to a GitHub repo\n- `/deploy` is a GitHub webhook URL that will fetch contents from GitHub and update the code on Val Town\n\n1. Fork this val\n1. Edit `config.json` to point to the repo and vals you plan to sync\n1. Create a new repo on GitHub to sync to\n1. Add a webhook to your repo that points to this val's `/deploy` route, e.g. `https://username-.web.val.run/deploy`\n \n - Create a _secret_ for your webhook \n - In this val's _Environment Variables_, add that secret as `GITHUB_WEBHOOK_SECRET`\n1. On GitHub, create a new personal [access token][]\n - Ensure the token has read/write access to _Contents_ for the repo\n - Copy the access token and add that as the `GITHUB_TOKEN` env var in this val\n1. Add a new [Val Town API token][] with read/write permissions. Add that token to the val's env vars as `VALTOWN_TOKEN`\n1. Add a `VAL_SECRET` env var to the val. Use this secret to sign the webhook POST request to the `/push` endpoint. Use this endpoint to commit vals from Val Town to your GitHub repo.\n\n### Example push to GitHub fetch\n\nYou can use this example to POST to the `/push` endpoint to copy vals to GitHub.\nYou should keep the code for this private so that only you can push to GitHub.\nThis example can run manually or use a Cron val.\n\n**NOTE: this can overwrite changes made outside of Val Town, on GitHub/etc.**\n\n```tsx\n// This can post to the GitHubSync `/push` webhook; keep this private\nimport sign from \"https://esm.town/v/jxnblk/GitHubSync/sign-webhook\";\n\nconst secret = Deno.env.get(\"SECRET\") as string;\nconst url = Deno.env.get(\"PUSH_URL\") as string;\n\nasync function pushValsToGitHub() {\n const body = \"hello\";\n const signature = await sign(body, secret);\n\n const res = await fetch(url, {\n method: \"POST\",\n body,\n headers: {\n \"x-val-signature\": signature,\n }\n })\n \n if (!res.ok) {\n console.log(res);\n return;\n }\n const json = await res.json();\n console.log(json);\n}\n\npushValsToGitHub();\n```\n\n## Env vars\n\n- `GITHUB_TOKEN`: Read/write GitHub personal access token for reading and writing repo contents \n- `VALTOWN_TOKEN`: ValTown API token (with read/write Vals permissions) for writing updates from GitHub\n- `GITHUB_WEBHOOK_SECRET`: secret for verifying webhooks from GitHub\n- `VAL_SECRET`: secret for verifying requests to the `/push` endpoint\n\n---\n\nThis is the latest version of .\n_Note: This will currently only work with non-project vals until the SDK supports projects._\n\n\n\n\n[github oauth app]: https://github.com/settings/developers\n[access token]: https://github.com/settings/tokens\n[val town api token]: https://www.val.town/settings/api\n[troubleshooting]: #troubleshooting\n\n[github repo]: https://github.com/jxnblk/valtown-github-sync-v2\n[example val]: https://val.town/v/jxnblk/GitHubSyncV2DemoVal",[],[225],{"_107":233,"_100":234,"_154":235,"_156":-5,"_157":141,"_158":236,"_160":161,"_109":237,"_104":238,"_164":178,"_166":239,"_167":27,"_168":-5,"_169":240,"_103":241},"4301421c-e58b-11ef-903f-e6cdfca9ef9f","commit-files","a10a6c42-e56a-11ef-bef0-e6cdfca9ef9f",139,["D",1738957175908],6,"import { Octokit } from \"npm:@octokit/rest\";\n\ninterface CommitOptions {\n token: string;\n owner: string;\n repo: string;\n files: {\n path: string;\n content: string;\n folder?: boolean;\n }[];\n branch?: string;\n message?: string;\n}\n\nconst FILE = \"100644\";\nconst FOLDER = \"040000\";\n\n/**\n * General use function to commit files to GitHub\n */\nexport async function commitFiles({\n token,\n owner,\n repo,\n files,\n branch = \"main\",\n message = \"published with https://val.town/x/jxnblk/GitHubSync\",\n}: CommitOptions) {\n const data: any = {};\n const gh = new Octokit({ auth: token });\n const user = await gh.rest.users.getAuthenticated();\n data.user = user.data;\n\n const ref = await gh.request(`GET /repos/${owner}/${repo}/git/ref/heads/${branch}`, {});\n data.ref = ref.data;\n\n // create tree\n const items = await Promise.all(\n files.map(async file => {\n const blob = await gh.request(`POST /repos/${owner}/${repo}/git/blobs`, {\n content: file.content,\n encoding: \"utf-8\",\n });\n\n return {\n path: file.path,\n sha: blob.data.sha,\n mode: file.folder ? FOLDER : FILE,\n type: \"blob\",\n };\n }),\n );\n\n const tree = await gh.request(`POST /repos/${owner}/${repo}/git/trees`, {\n base_tree: data.ref.object.sha,\n tree: items,\n });\n\n data.tree = tree.data;\n\n // create commit\n const commit = await gh.request(`POST /repos/${owner}/${repo}/git/commits`, {\n message,\n tree: data.tree.sha,\n parents: [data.ref.object.sha],\n });\n\n data.commit = commit.data;\n\n // push commit\n const push = await gh.request(`POST /repos/${owner}/${repo}/git/refs/heads/${branch}`, {\n sha: data.commit.sha,\n });\n\n data.push = push.data;\n return data;\n}",[],[234],{"_107":243,"_100":244,"_154":245,"_156":-5,"_157":141,"_158":246,"_160":161,"_109":247,"_104":238,"_164":228,"_166":248,"_167":27,"_168":-5,"_169":249,"_103":250},"ddffecaa-e581-11ef-b4c0-e6cdfca9ef9f","config.json","4dfa861c-e56b-11ef-9ffd-e6cdfca9ef9f",112,["D",1738953140978],"{\n \"owner\": \"jxnblk\",\n \"repo\": \"valtown-github-sync-v2\",\n \"branch\": \"refs/heads/main\",\n \"vals\": [\n \"GitHubSyncV2DemoVal\"\n ]\n}",[],[244],{"_107":252,"_100":253,"_154":254,"_156":-5,"_157":141,"_158":255,"_160":161,"_109":256,"_104":257,"_164":258,"_166":259,"_167":27,"_168":-5,"_169":260,"_103":261},"def1d8e0-f2ff-11ef-9dc9-569c3dd06744","index","eb615ef4-e56a-11ef-b91b-e6cdfca9ef9f",174,["D",1740436624268],21,"http","/** @jsxImportSource npm:hono/jsx */\nimport { Hono } from \"npm:hono\";\nimport config from \"./config.json\" with { type: \"json\" };\nimport push from \"./routes/github-push\";\nimport Home from \"./routes/home\";\nimport deploy from \"./routes/valtown-deploy\";\nimport {\n //\n verifyGitHubSignature,\n verifyValSignature,\n} from \"./routes/middleware\";\n\nconst VAL_SECRET = Deno.env.get(\"VAL_SECRET\");\nconst GITHUB_WEBHOOK_SECRET = Deno.env.get(\"GITHUB_WEBHOOK_SECRET\");\n\nconst app = new Hono();\n\napp.get(\"/\", Home);\n\napp.post(\"/push\", verifyValSignature(VAL_SECRET), push);\n\napp.post(\"/deploy\", verifyGitHubSignature(GITHUB_WEBHOOK_SECRET), deploy);\n\nexport default app.fetch;",[],[253],{"_107":263,"_100":264,"_154":265,"_156":-5,"_157":141,"_158":266,"_160":161,"_109":267,"_104":188,"_164":178,"_166":268,"_167":27,"_168":-5,"_169":269,"_103":270},"f659a620-e58a-11ef-bf7f-e6cdfca9ef9f","sign-webhook","36340550-e587-11ef-9c42-e6cdfca9ef9f",137,["D",1738957047304],"/**\n * Use this function along with your valtown webhook secret to create\n * the x-val-signature header when posting to the /export webhook\n */\nexport const signWebhook = async (payload: unknown, secret: string) => {\n console.log(\"signWebhook\");\n const encoder = new TextEncoder();\n const key = await crypto.subtle.importKey(\n \"raw\",\n encoder.encode(secret),\n { name: \"HMAC\", hash: \"SHA-256\" },\n false,\n [\"sign\"],\n );\n console.log(\"signWebhook\", {\n payload,\n });\n const signature = await crypto.subtle.sign(\n \"HMAC\",\n key,\n encoder.encode(payload),\n );\n return Buffer.from(signature).toString(\"hex\");\n};\n\nexport default signWebhook;",[],[264],"files",[151,171,182,192,202,212,223,232,242,251,262],"counts",{"_275":31,"_276":163,"_277":208,"_278":279},"pulls","branches","forks","envVars",4,"contents",[282,285,288,291,294,297],{"_107":152,"_100":153,"_154":155,"_156":-5,"_157":141,"_158":159,"_160":161,"_109":283,"_104":163,"_164":165,"_166":-5,"_167":27,"_168":-5,"_103":284},["D",1738943921472],[153],{"_107":224,"_100":225,"_154":121,"_156":-5,"_157":141,"_158":140,"_160":161,"_109":286,"_104":227,"_164":228,"_166":229,"_167":27,"_168":-5,"_103":287},["D",1741127948569],[225],{"_107":233,"_100":234,"_154":235,"_156":-5,"_157":141,"_158":236,"_160":161,"_109":289,"_104":238,"_164":178,"_166":239,"_167":27,"_168":-5,"_103":290},["D",1738957175908],[234],{"_107":243,"_100":244,"_154":245,"_156":-5,"_157":141,"_158":246,"_160":161,"_109":292,"_104":238,"_164":228,"_166":248,"_167":27,"_168":-5,"_103":293},["D",1738953140978],[244],{"_107":252,"_100":253,"_154":254,"_156":-5,"_157":141,"_158":255,"_160":161,"_109":295,"_104":257,"_164":258,"_166":259,"_167":27,"_168":-5,"_103":296},["D",1740436624268],[253],{"_107":263,"_100":264,"_154":265,"_156":-5,"_157":141,"_158":266,"_160":161,"_109":298,"_104":188,"_164":178,"_166":268,"_167":27,"_168":-5,"_103":299},["D",1738957047304],[264],"upstreamProject","upstreamBranch","emptyEnvVars","isNew","routes/_app.x.$handle.$name.code.$",{"_98":99,"_100":101,"_102":42,"_104":-7,"_103":73,"_105":306,"_149":310,"_271":344,"_228":-7,"_280":345,"_358":-5,"_359":27,"_360":-5,"_361":-5,"_362":-5,"_363":364},{"_107":108,"_100":101,"_109":307,"_111":-5,"_112":27,"_113":114,"_115":116,"_117":118,"_12":119,"_120":121,"_122":27,"_123":-5,"_124":31,"_125":126,"_127":126,"_128":129,"_130":129,"_131":129,"_132":126,"_133":126,"_134":27,"_21":308,"_138":309},["D",1738939661756],{"_98":99,"_136":137},{"_104":140,"_100":42,"_107":141,"_142":108,"_143":-5,"_144":-5,"_145":-5,"_146":-5,"_147":101,"_148":99},[311,329,332,335,338,341],{"_107":152,"_100":153,"_154":155,"_156":-5,"_157":141,"_158":159,"_160":161,"_109":162,"_104":163,"_164":165,"_166":-5,"_167":27,"_168":-5,"_169":312,"_103":328},[313,316,319,322,325],{"_107":172,"_100":173,"_154":174,"_156":155,"_157":141,"_158":175,"_160":161,"_109":176,"_104":177,"_164":178,"_166":179,"_167":27,"_168":-5,"_169":314,"_103":315},[],[153,173],{"_107":183,"_100":184,"_154":185,"_156":155,"_157":141,"_158":186,"_160":161,"_109":187,"_104":188,"_164":178,"_166":189,"_167":27,"_168":-5,"_169":317,"_103":318},[],[153,184],{"_107":193,"_100":194,"_154":195,"_156":155,"_157":141,"_158":196,"_160":161,"_109":197,"_104":198,"_164":178,"_166":199,"_167":27,"_168":-5,"_169":320,"_103":321},[],[153,194],{"_107":203,"_100":204,"_154":205,"_156":155,"_157":141,"_158":206,"_160":161,"_109":207,"_104":208,"_164":178,"_166":209,"_167":27,"_168":-5,"_169":323,"_103":324},[],[153,204],{"_107":213,"_100":214,"_154":215,"_156":155,"_157":141,"_158":216,"_160":161,"_109":217,"_104":218,"_164":178,"_166":219,"_167":27,"_168":-5,"_169":326,"_103":327},[],[153,214],[153],{"_107":224,"_100":225,"_154":121,"_156":-5,"_157":141,"_158":140,"_160":161,"_109":226,"_104":227,"_164":228,"_166":229,"_167":27,"_168":-5,"_169":330,"_103":331},[],[225],{"_107":233,"_100":234,"_154":235,"_156":-5,"_157":141,"_158":236,"_160":161,"_109":237,"_104":238,"_164":178,"_166":239,"_167":27,"_168":-5,"_169":333,"_103":334},[],[234],{"_107":243,"_100":244,"_154":245,"_156":-5,"_157":141,"_158":246,"_160":161,"_109":247,"_104":238,"_164":228,"_166":248,"_167":27,"_168":-5,"_169":336,"_103":337},[],[244],{"_107":252,"_100":253,"_154":254,"_156":-5,"_157":141,"_158":255,"_160":161,"_109":256,"_104":257,"_164":258,"_166":259,"_167":27,"_168":-5,"_169":339,"_103":340},[],[253],{"_107":263,"_100":264,"_154":265,"_156":-5,"_157":141,"_158":266,"_160":161,"_109":267,"_104":188,"_164":178,"_166":268,"_167":27,"_168":-5,"_169":342,"_103":343},[],[264],[311,313,316,319,322,325,329,332,335,338,341],[346,348,350,352,354,356],{"_107":152,"_100":153,"_154":155,"_156":-5,"_157":141,"_158":159,"_160":161,"_109":283,"_104":163,"_164":165,"_166":-5,"_167":27,"_168":-5,"_103":347},[153],{"_107":224,"_100":225,"_154":121,"_156":-5,"_157":141,"_158":140,"_160":161,"_109":286,"_104":227,"_164":228,"_166":229,"_167":27,"_168":-5,"_103":349},[225],{"_107":233,"_100":234,"_154":235,"_156":-5,"_157":141,"_158":236,"_160":161,"_109":289,"_104":238,"_164":178,"_166":239,"_167":27,"_168":-5,"_103":351},[234],{"_107":243,"_100":244,"_154":245,"_156":-5,"_157":141,"_158":246,"_160":161,"_109":292,"_104":238,"_164":228,"_166":248,"_167":27,"_168":-5,"_103":353},[244],{"_107":252,"_100":253,"_154":254,"_156":-5,"_157":141,"_158":255,"_160":161,"_109":295,"_104":257,"_164":258,"_166":259,"_167":27,"_168":-5,"_103":355},[253],{"_107":263,"_100":264,"_154":265,"_156":-5,"_157":141,"_158":266,"_160":161,"_109":298,"_104":188,"_164":178,"_166":268,"_167":27,"_168":-5,"_103":357},[264],"upstream","showCompareCallout","pull","ahead","behind","templates",[],"routes/_app","actionData","errors"]

\n GitHubSync\n Sync vals from Val Town to GitHub and back\n

\n GitHubSync\n
Sync vals from Val Town to GitHub and back
\n