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

\n View source\n \n ,\n );\n}",[],[156,186],{"_104":195,"_95":196,"_157":197,"_159":158,"_160":142,"_161":198,"_163":164,"_106":199,"_100":200,"_166":180,"_168":201,"_169":22,"_170":-5,"_171":202,"_98":203},"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};",[],[156,196],{"_104":205,"_95":206,"_157":207,"_159":158,"_160":142,"_161":208,"_163":164,"_106":209,"_100":210,"_166":180,"_168":211,"_169":22,"_170":-5,"_171":212,"_98":213},"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};",[],[156,206],{"_104":215,"_95":216,"_157":217,"_159":158,"_160":142,"_161":218,"_163":164,"_106":219,"_100":220,"_166":180,"_168":221,"_169":22,"_170":-5,"_171":222,"_98":223},"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};",[],[156,216],[156],{"_104":226,"_95":227,"_157":118,"_159":-5,"_160":142,"_161":228,"_163":22,"_106":229,"_100":230,"_166":231,"_168":232,"_169":22,"_170":-5,"_171":233,"_98":234},"5c478d92-e592-11ef-bac6-e6cdfca9ef9f","README.md",173,["D",1738960224789],38,"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",[],[227],{"_104":236,"_95":237,"_157":238,"_159":-5,"_160":142,"_161":239,"_163":164,"_106":240,"_100":241,"_166":180,"_168":242,"_169":22,"_170":-5,"_171":243,"_98":244},"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}",[],[237],{"_104":246,"_95":247,"_157":248,"_159":-5,"_160":142,"_161":249,"_163":164,"_106":250,"_100":241,"_166":231,"_168":251,"_169":22,"_170":-5,"_171":252,"_98":253},"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}",[],[247],{"_104":255,"_95":256,"_157":257,"_159":-5,"_160":142,"_161":101,"_163":164,"_106":258,"_100":259,"_166":260,"_168":261,"_169":22,"_170":-5,"_171":262,"_98":263},"def1d8e0-f2ff-11ef-9dc9-569c3dd06744","index","eb615ef4-e56a-11ef-b91b-e6cdfca9ef9f",["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;",[],[256],{"_104":265,"_95":99,"_157":266,"_159":-5,"_160":142,"_161":267,"_163":164,"_106":268,"_100":190,"_166":180,"_168":269,"_169":22,"_170":-5,"_171":270,"_98":271},"f659a620-e58a-11ef-bf7f-e6cdfca9ef9f","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;",[],[99],"files",[154,173,184,194,204,214,225,235,245,254,264],"counts",{"_276":32,"_277":122,"_278":190,"_279":280},"pulls","branches","forks","envVars",4,"contents",[],{"_104":265,"_95":99,"_157":266,"_159":-5,"_160":142,"_161":267,"_163":164,"_106":284,"_100":190,"_166":180,"_168":269,"_169":22,"_170":-5,"_98":285},["D",1738957047304],[99],"upstreamProject","upstreamBranch","emptyEnvVars","isNew","flags",[],"routes/_app.x.$handle.$name.branch.$branch.version.$version.code.$",{"_93":94,"_95":96,"_97":43,"_100":101,"_98":99,"_102":294,"_152":299,"_272":333,"_231":334,"_281":336,"_337":-5,"_338":22,"_339":-5,"_340":-5,"_341":-5,"_342":343},{"_104":105,"_95":96,"_106":295,"_108":-5,"_109":22,"_110":111,"_112":113,"_114":115,"_14":116,"_117":118,"_119":22,"_120":-5,"_121":122,"_16":123,"_124":125,"_126":125,"_127":128,"_129":128,"_130":128,"_131":125,"_132":125,"_23":296,"_136":297,"_139":298,"_151":22},["D",1738939661756],{"_93":94,"_134":135},{"_93":94,"_138":135},{"_100":141,"_95":43,"_104":142,"_143":105,"_144":-5,"_145":-5,"_146":-5,"_147":-5,"_148":-5,"_149":96,"_150":94},[300,318,321,324,327,330],{"_104":155,"_95":156,"_157":158,"_159":-5,"_160":142,"_161":162,"_163":164,"_106":165,"_100":122,"_166":167,"_168":-5,"_169":22,"_170":-5,"_171":301,"_98":317},[302,305,308,311,314],{"_104":174,"_95":175,"_157":176,"_159":158,"_160":142,"_161":177,"_163":164,"_106":178,"_100":179,"_166":180,"_168":181,"_169":22,"_170":-5,"_171":303,"_98":304},[],[156,175],{"_104":185,"_95":186,"_157":187,"_159":158,"_160":142,"_161":188,"_163":164,"_106":189,"_100":190,"_166":180,"_168":191,"_169":22,"_170":-5,"_171":306,"_98":307},[],[156,186],{"_104":195,"_95":196,"_157":197,"_159":158,"_160":142,"_161":198,"_163":164,"_106":199,"_100":200,"_166":180,"_168":201,"_169":22,"_170":-5,"_171":309,"_98":310},[],[156,196],{"_104":205,"_95":206,"_157":207,"_159":158,"_160":142,"_161":208,"_163":164,"_106":209,"_100":210,"_166":180,"_168":211,"_169":22,"_170":-5,"_171":312,"_98":313},[],[156,206],{"_104":215,"_95":216,"_157":217,"_159":158,"_160":142,"_161":218,"_163":164,"_106":219,"_100":220,"_166":180,"_168":221,"_169":22,"_170":-5,"_171":315,"_98":316},[],[156,216],[156],{"_104":226,"_95":227,"_157":118,"_159":-5,"_160":142,"_161":228,"_163":22,"_106":229,"_100":230,"_166":231,"_168":232,"_169":22,"_170":-5,"_171":319,"_98":320},[],[227],{"_104":236,"_95":237,"_157":238,"_159":-5,"_160":142,"_161":239,"_163":164,"_106":240,"_100":241,"_166":180,"_168":242,"_169":22,"_170":-5,"_171":322,"_98":323},[],[237],{"_104":246,"_95":247,"_157":248,"_159":-5,"_160":142,"_161":249,"_163":164,"_106":250,"_100":241,"_166":231,"_168":251,"_169":22,"_170":-5,"_171":325,"_98":326},[],[247],{"_104":255,"_95":256,"_157":257,"_159":-5,"_160":142,"_161":101,"_163":164,"_106":258,"_100":259,"_166":260,"_168":261,"_169":22,"_170":-5,"_171":328,"_98":329},[],[256],{"_104":265,"_95":99,"_157":266,"_159":-5,"_160":142,"_161":267,"_163":164,"_106":268,"_100":190,"_166":180,"_168":269,"_169":22,"_170":-5,"_171":331,"_98":332},[],[99],[300,302,305,308,311,314,318,321,324,327,330],{"_104":265,"_95":99,"_157":266,"_159":-5,"_160":142,"_161":267,"_163":164,"_106":284,"_100":190,"_166":180,"_168":269,"_169":22,"_170":-5,"_98":335},[99],[],"upstream","showCompareCallout","pull","ahead","behind","templates",[],"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