| 1 | /** |
| 2 | * Parsing, normalization and validation of GitHub Actions workflow files. |
| 3 | */ |
| 4 | import { LineCounter, isAlias, isMap, isScalar, isSeq, parseDocument, type Document, type Node as YamlNode } from "yaml"; |
| 5 | import { validateCron } from "./cron.js"; |
| 6 | import { checkExpressionSyntax } from "./expr/evaluate.js"; |
| 7 | import { soleExpression, splitTemplate, TemplateError } from "./expr/template.js"; |
| 8 | import { jobOrder } from "./graph.js"; |
| 9 | import { expandMatrix } from "./matrix.js"; |
| 10 | import type { |
| 11 | Concurrency, |
| 12 | ContainerSpec, |
| 13 | Defaults, |
| 14 | DispatchInput, |
| 15 | EnvironmentSpec, |
| 16 | Job, |
| 17 | Permissions, |
| 18 | StepSpec, |
| 19 | Strategy, |
| 20 | Workflow, |
| 21 | WorkflowCallTrigger, |
| 22 | WorkflowError, |
| 23 | WorkflowOn, |
| 24 | } from "./model.js"; |
| 25 | |
| 26 | type Seg = string | number; |
| 27 | type Obj = Record<string, unknown>; |
| 28 | |
| 29 | export const WARNING_PREFIX = "warning:"; |
| 30 | export const isWarning = (e: WorkflowError): boolean => e.message.startsWith(WARNING_PREFIX); |
| 31 | |
| 32 | const TOP_LEVEL_KEYS = new Set(["name", "run-name", "on", "env", "defaults", "permissions", "concurrency", "jobs"]); |
| 33 | const JOB_KEYS = new Set([ |
| 34 | "name", "permissions", "needs", "if", "runs-on", "snapshot", "environment", "concurrency", "outputs", "env", |
| 35 | "defaults", "steps", "timeout-minutes", "strategy", "continue-on-error", "container", "services", "uses", "with", |
| 36 | "secrets", |
| 37 | ]); |
| 38 | const REUSABLE_JOB_KEYS = new Set(["name", "uses", "with", "secrets", "needs", "if", "permissions", "concurrency", "strategy"]); |
| 39 | const STEP_KEYS = new Set([ |
| 40 | "id", "if", "name", "uses", "run", "working-directory", "shell", "with", "env", "continue-on-error", "timeout-minutes", |
| 41 | ]); |
| 42 | export const KNOWN_EVENTS = new Set([ |
| 43 | "branch_protection_rule", "check_run", "check_suite", "create", "delete", "deployment", "deployment_status", |
| 44 | "discussion", "discussion_comment", "fork", "gollum", "issue_comment", "issues", "label", "merge_group", |
| 45 | "milestone", "page_build", "project", "project_card", "project_column", "public", "pull_request", |
| 46 | "pull_request_review", "pull_request_review_comment", "pull_request_target", "push", "registry_package", "release", |
| 47 | "repository_dispatch", "schedule", "status", "watch", "workflow_call", "workflow_dispatch", "workflow_run", |
| 48 | ]); |
| 49 | const PERMISSION_SCOPES = new Set([ |
| 50 | "actions", "attestations", "checks", "contents", "deployments", "discussions", "id-token", "issues", "models", |
| 51 | "packages", "pages", "pull-requests", "repository-projects", "security-events", "statuses", |
| 52 | ]); |
| 53 | const INPUT_TYPES_DISPATCH = new Set(["string", "boolean", "number", "choice", "environment"]); |
| 54 | const INPUT_TYPES_CALL = new Set(["string", "boolean", "number"]); |
| 55 | const ID_RE = /^[A-Za-z_][A-Za-z0-9_-]*$/; |
| 56 | |
| 57 | const isObj = (v: unknown): v is Obj => typeof v === "object" && v !== null && !Array.isArray(v); |
| 58 | const isScalarValue = (v: unknown): v is string | number | boolean => |
| 59 | typeof v === "string" || typeof v === "number" || typeof v === "boolean"; |
| 60 | |
| 61 | export function formatPath(path: readonly Seg[]): string { |
| 62 | let out = ""; |
| 63 | for (const s of path) out += typeof s === "number" ? `[${s}]` : out === "" ? s : `.${s}`; |
| 64 | return out; |
| 65 | } |
| 66 | |
| 67 | class Context { |
| 68 | readonly errors: WorkflowError[] = []; |
| 69 | constructor( |
| 70 | private readonly doc: Document, |
| 71 | private readonly lc: LineCounter, |
| 72 | ) {} |
| 73 | |
| 74 | /** Finds the YAML node at `path` (the key node when `key` is set), falling back to the deepest existing ancestor. */ |
| 75 | private locate(path: readonly Seg[], key: boolean): { line?: number; col?: number } { |
| 76 | let node: unknown = this.doc.contents; |
| 77 | let best: unknown = node; |
| 78 | for (let i = 0; i < path.length; i++) { |
| 79 | const seg = path[i]!; |
| 80 | if (isAlias(node)) node = node.resolve(this.doc); |
| 81 | if (isMap(node)) { |
| 82 | const pair = node.items.find((p) => (isScalar(p.key) ? String(p.key.value) : String(p.key)) === String(seg)); |
| 83 | if (!pair) break; |
| 84 | const last = i === path.length - 1; |
| 85 | best = last && key ? pair.key : (pair.value ?? pair.key); |
| 86 | node = pair.value; |
| 87 | } else if (isSeq(node) && typeof seg === "number") { |
| 88 | const item = node.items[seg]; |
| 89 | if (!item) break; |
| 90 | best = item; |
| 91 | node = item; |
| 92 | } else { |
| 93 | break; |
| 94 | } |
| 95 | } |
| 96 | const range = (best as YamlNode | undefined)?.range; |
| 97 | if (!range) return {}; |
| 98 | const pos = this.lc.linePos(range[0]); |
| 99 | return { line: pos.line, col: pos.col }; |
| 100 | } |
| 101 | |
| 102 | error(path: readonly Seg[], message: string, opts: { key?: boolean } = {}): void { |
| 103 | this.errors.push({ path: formatPath(path), ...this.locate(path, opts.key ?? false), message }); |
| 104 | } |
| 105 | |
| 106 | warn(path: readonly Seg[], message: string): void { |
| 107 | this.error(path, `${WARNING_PREFIX} ${message}`, { key: true }); |
| 108 | } |
| 109 | |
| 110 | /** Re-anchors an error whose path is a dotted string (from jobOrder). */ |
| 111 | errorDotted(dotted: string, message: string): void { |
| 112 | this.error(dotted.split("."), message, { key: true }); |
| 113 | } |
| 114 | |
| 115 | // ---- value helpers ------------------------------------------------------- |
| 116 | |
| 117 | str(v: unknown, path: Seg[], what = "a string"): string | undefined { |
| 118 | if (v === undefined || v === null) return undefined; |
| 119 | if (isScalarValue(v)) return String(v); |
| 120 | this.error(path, `${formatPath(path)} must be ${what}`); |
| 121 | return undefined; |
| 122 | } |
| 123 | |
| 124 | strList(v: unknown, path: Seg[]): string[] | undefined { |
| 125 | if (v === undefined || v === null) return undefined; |
| 126 | if (isScalarValue(v)) return [String(v)]; |
| 127 | if (Array.isArray(v)) { |
| 128 | const out: string[] = []; |
| 129 | v.forEach((item, i) => { |
| 130 | if (isScalarValue(item)) out.push(String(item)); |
| 131 | else this.error([...path, i], `${formatPath([...path, i])} must be a string`); |
| 132 | }); |
| 133 | return out; |
| 134 | } |
| 135 | this.error(path, `${formatPath(path)} must be a string or a list of strings`); |
| 136 | return undefined; |
| 137 | } |
| 138 | |
| 139 | strMap(v: unknown, path: Seg[]): Record<string, string> { |
| 140 | const out: Record<string, string> = {}; |
| 141 | if (v === undefined || v === null) return out; |
| 142 | if (typeof v === "string" && soleExpression(v) !== undefined) { |
| 143 | // e.g. `env: ${{ fromJSON(...) }}` — cannot be normalized statically. |
| 144 | this.error(path, `${formatPath(path)} must be a mapping (expressions producing whole mappings are not supported here)`); |
| 145 | return out; |
| 146 | } |
| 147 | if (!isObj(v)) { |
| 148 | this.error(path, `${formatPath(path)} must be a mapping`); |
| 149 | return out; |
| 150 | } |
| 151 | for (const [k, val] of Object.entries(v)) { |
| 152 | if (val === null || val === undefined) out[k] = ""; |
| 153 | else if (isScalarValue(val)) out[k] = String(val); |
| 154 | else this.error([...path, k], `${formatPath([...path, k])} must be a string, number or boolean`); |
| 155 | } |
| 156 | return out; |
| 157 | } |
| 158 | |
| 159 | boolOrExpr(v: unknown, path: Seg[], dflt: boolean): boolean | string { |
| 160 | if (v === undefined || v === null) return dflt; |
| 161 | if (typeof v === "boolean") return v; |
| 162 | if (typeof v === "string") { |
| 163 | if (v === "true" || v === "false") return v === "true"; |
| 164 | if (soleExpression(v) !== undefined) return v; |
| 165 | } |
| 166 | this.error(path, `${formatPath(path)} must be a boolean or an expression`); |
| 167 | return dflt; |
| 168 | } |
| 169 | |
| 170 | numOrExpr(v: unknown, path: Seg[]): number | string | undefined { |
| 171 | if (v === undefined || v === null) return undefined; |
| 172 | if (typeof v === "number" && Number.isFinite(v)) return v; |
| 173 | if (typeof v === "string") { |
| 174 | if (/^\d+(\.\d+)?$/.test(v.trim())) return Number(v); |
| 175 | if (soleExpression(v) !== undefined) return v; |
| 176 | } |
| 177 | this.error(path, `${formatPath(path)} must be a number or an expression`); |
| 178 | return undefined; |
| 179 | } |
| 180 | |
| 181 | unknownKeys(obj: Obj, allowed: Set<string>, path: Seg[], what: string): void { |
| 182 | for (const k of Object.keys(obj)) { |
| 183 | if (!allowed.has(k)) this.warn([...path, k], `unknown ${what} key '${k}'`); |
| 184 | } |
| 185 | } |
| 186 | } |
| 187 | |
| 188 | // ---- `on:` --------------------------------------------------------------------- |
| 189 | |
| 190 | function normalizeOn(c: Context, raw: unknown): WorkflowOn { |
| 191 | const on: WorkflowOn = {}; |
| 192 | const path: Seg[] = ["on"]; |
| 193 | if (typeof raw === "string") { |
| 194 | addEvent(c, on, raw, null, path); |
| 195 | } else if (Array.isArray(raw)) { |
| 196 | raw.forEach((ev, i) => { |
| 197 | if (typeof ev === "string") addEvent(c, on, ev, null, [...path, i]); |
| 198 | else c.error([...path, i], "on[] entries must be event names"); |
| 199 | }); |
| 200 | } else if (isObj(raw)) { |
| 201 | for (const [ev, cfg] of Object.entries(raw)) addEvent(c, on, ev, cfg, [...path, ev]); |
| 202 | } else { |
| 203 | c.error(path, "'on' must be an event name, a list of event names or a mapping"); |
| 204 | } |
| 205 | if (Object.keys(on).length === 0 && (Array.isArray(raw) || isObj(raw))) c.error(path, "'on' must define at least one event"); |
| 206 | return on; |
| 207 | } |
| 208 | |
| 209 | function exclusive(c: Context, cfg: Obj, path: Seg[], a: string, b: string): void { |
| 210 | if (cfg[a] !== undefined && cfg[b] !== undefined) c.error(path, `'${a}' and '${b}' cannot be used together for the same event`); |
| 211 | } |
| 212 | |
| 213 | function addEvent(c: Context, on: WorkflowOn, ev: string, cfg: unknown, path: Seg[]): void { |
| 214 | if (!KNOWN_EVENTS.has(ev)) c.warn(path, `unknown event '${ev}'`); |
| 215 | if (ev === "schedule") { |
| 216 | on.schedule = normalizeSchedule(c, cfg, path); |
| 217 | return; |
| 218 | } |
| 219 | if (cfg !== null && cfg !== undefined && !isObj(cfg)) { |
| 220 | c.error(path, `on.${ev} must be a mapping`); |
| 221 | on[ev] = {}; |
| 222 | return; |
| 223 | } |
| 224 | const o: Obj = cfg ?? {}; |
| 225 | const list = (k: string) => c.strList(o[k], [...path, k]); |
| 226 | const pick = <T extends Obj>(entries: Record<string, unknown>): T => |
| 227 | Object.fromEntries(Object.entries(entries).filter(([, v]) => v !== undefined)) as T; |
| 228 | |
| 229 | switch (ev) { |
| 230 | case "push": |
| 231 | exclusive(c, o, path, "branches", "branches-ignore"); |
| 232 | exclusive(c, o, path, "tags", "tags-ignore"); |
| 233 | exclusive(c, o, path, "paths", "paths-ignore"); |
| 234 | on.push = pick({ |
| 235 | branches: list("branches"), |
| 236 | branchesIgnore: list("branches-ignore"), |
| 237 | tags: list("tags"), |
| 238 | tagsIgnore: list("tags-ignore"), |
| 239 | paths: list("paths"), |
| 240 | pathsIgnore: list("paths-ignore"), |
| 241 | }); |
| 242 | return; |
| 243 | case "pull_request": |
| 244 | case "pull_request_target": |
| 245 | exclusive(c, o, path, "branches", "branches-ignore"); |
| 246 | exclusive(c, o, path, "paths", "paths-ignore"); |
| 247 | on[ev] = pick({ |
| 248 | types: list("types"), |
| 249 | branches: list("branches"), |
| 250 | branchesIgnore: list("branches-ignore"), |
| 251 | paths: list("paths"), |
| 252 | pathsIgnore: list("paths-ignore"), |
| 253 | }); |
| 254 | return; |
| 255 | case "workflow_dispatch": { |
| 256 | const inputs = normalizeInputs(c, o.inputs, [...path, "inputs"], INPUT_TYPES_DISPATCH, false); |
| 257 | on.workflow_dispatch = inputs ? { inputs } : {}; |
| 258 | return; |
| 259 | } |
| 260 | case "workflow_call": { |
| 261 | const call: WorkflowCallTrigger = {}; |
| 262 | const inputs = normalizeInputs(c, o.inputs, [...path, "inputs"], INPUT_TYPES_CALL, true); |
| 263 | if (inputs) call.inputs = inputs; |
| 264 | if (o.outputs !== undefined && o.outputs !== null) { |
| 265 | if (!isObj(o.outputs)) c.error([...path, "outputs"], "on.workflow_call.outputs must be a mapping"); |
| 266 | else { |
| 267 | call.outputs = {}; |
| 268 | for (const [name, def] of Object.entries(o.outputs)) { |
| 269 | const p = [...path, "outputs", name]; |
| 270 | if (!isObj(def) || typeof def.value !== "string") { |
| 271 | c.error(p, `workflow_call output '${name}' must be a mapping with a 'value'`); |
| 272 | continue; |
| 273 | } |
| 274 | call.outputs[name] = pick({ description: c.str(def.description, [...p, "description"]), value: def.value }); |
| 275 | } |
| 276 | } |
| 277 | } |
| 278 | if (o.secrets !== undefined && o.secrets !== null) { |
| 279 | if (!isObj(o.secrets)) c.error([...path, "secrets"], "on.workflow_call.secrets must be a mapping"); |
| 280 | else { |
| 281 | call.secrets = {}; |
| 282 | for (const [name, def] of Object.entries(o.secrets)) { |
| 283 | const d = isObj(def) ? def : {}; |
| 284 | call.secrets[name] = pick({ |
| 285 | description: c.str(d.description, [...path, "secrets", name, "description"]), |
| 286 | required: typeof d.required === "boolean" ? d.required : undefined, |
| 287 | }); |
| 288 | } |
| 289 | } |
| 290 | } |
| 291 | on.workflow_call = call; |
| 292 | return; |
| 293 | } |
| 294 | case "merge_group": |
| 295 | exclusive(c, o, path, "branches", "branches-ignore"); |
| 296 | on.merge_group = pick({ types: list("types"), branches: list("branches"), branchesIgnore: list("branches-ignore") }); |
| 297 | return; |
| 298 | case "workflow_run": |
| 299 | exclusive(c, o, path, "branches", "branches-ignore"); |
| 300 | on.workflow_run = pick({ |
| 301 | workflows: list("workflows"), |
| 302 | types: list("types"), |
| 303 | branches: list("branches"), |
| 304 | branchesIgnore: list("branches-ignore"), |
| 305 | }); |
| 306 | return; |
| 307 | default: { |
| 308 | const out: Obj = { ...o }; |
| 309 | if (o.types !== undefined) out.types = list("types"); |
| 310 | on[ev] = out; |
| 311 | } |
| 312 | } |
| 313 | } |
| 314 | |
| 315 | function normalizeSchedule(c: Context, cfg: unknown, path: Seg[]): { cron: string }[] { |
| 316 | if (!Array.isArray(cfg)) { |
| 317 | c.error(path, "on.schedule must be a list of { cron: '...' } entries"); |
| 318 | return []; |
| 319 | } |
| 320 | const out: { cron: string }[] = []; |
| 321 | cfg.forEach((entry, i) => { |
| 322 | const p = [...path, i]; |
| 323 | if (!isObj(entry) || typeof entry.cron !== "string") { |
| 324 | c.error(p, "on.schedule entries must have a 'cron' string"); |
| 325 | return; |
| 326 | } |
| 327 | const err = validateCron(entry.cron); |
| 328 | if (err) c.error([...p, "cron"], `Invalid cron: ${err}`); |
| 329 | else out.push({ cron: entry.cron }); |
| 330 | }); |
| 331 | return out; |
| 332 | } |
| 333 | |
| 334 | function normalizeInputs( |
| 335 | c: Context, |
| 336 | raw: unknown, |
| 337 | path: Seg[], |
| 338 | types: Set<string>, |
| 339 | typeRequired: boolean, |
| 340 | ): Record<string, DispatchInput> | undefined { |
| 341 | if (raw === undefined || raw === null) return undefined; |
| 342 | if (!isObj(raw)) { |
| 343 | c.error(path, `${formatPath(path)} must be a mapping`); |
| 344 | return undefined; |
| 345 | } |
| 346 | const out: Record<string, DispatchInput> = {}; |
| 347 | for (const [name, def] of Object.entries(raw)) { |
| 348 | const p = [...path, name]; |
| 349 | const d = isObj(def) ? def : {}; |
| 350 | if (def !== null && !isObj(def)) c.error(p, `input '${name}' must be a mapping`); |
| 351 | const input: DispatchInput = {}; |
| 352 | const description = c.str(d.description, [...p, "description"]); |
| 353 | if (description !== undefined) input.description = description; |
| 354 | if (d.required !== undefined) { |
| 355 | if (typeof d.required === "boolean") input.required = d.required; |
| 356 | else c.error([...p, "required"], `input '${name}': 'required' must be a boolean`); |
| 357 | } |
| 358 | if (d.default !== undefined) input.default = d.default; |
| 359 | if (d.type !== undefined) { |
| 360 | const t = String(d.type); |
| 361 | if (!types.has(t)) c.error([...p, "type"], `input '${name}': invalid type '${t}' (expected one of ${[...types].join(", ")})`); |
| 362 | input.type = t; |
| 363 | } else if (typeRequired) { |
| 364 | c.error(p, `input '${name}' must declare a 'type'`, { key: true }); |
| 365 | } |
| 366 | if (d.options !== undefined) input.options = c.strList(d.options, [...p, "options"]) ?? []; |
| 367 | if (input.type === "choice" && (!input.options || input.options.length === 0)) { |
| 368 | c.error(p, `input '${name}' of type 'choice' must define 'options'`, { key: true }); |
| 369 | } |
| 370 | if (typeof d.deprecationMessage === "string") input.deprecationMessage = d.deprecationMessage; |
| 371 | out[name] = input; |
| 372 | } |
| 373 | return out; |
| 374 | } |
| 375 | |
| 376 | // ---- shared job/workflow pieces -------------------------------------------------- |
| 377 | |
| 378 | function normalizeDefaults(c: Context, raw: unknown, path: Seg[]): Defaults { |
| 379 | if (raw === undefined || raw === null) return {}; |
| 380 | if (!isObj(raw)) { |
| 381 | c.error(path, `${formatPath(path)} must be a mapping`); |
| 382 | return {}; |
| 383 | } |
| 384 | const out: Defaults = {}; |
| 385 | if (raw.run !== undefined && raw.run !== null) { |
| 386 | if (!isObj(raw.run)) c.error([...path, "run"], `${formatPath([...path, "run"])} must be a mapping`); |
| 387 | else { |
| 388 | out.run = {}; |
| 389 | const shell = c.str(raw.run.shell, [...path, "run", "shell"]); |
| 390 | const wd = c.str(raw.run["working-directory"], [...path, "run", "working-directory"]); |
| 391 | if (shell !== undefined) out.run.shell = shell; |
| 392 | if (wd !== undefined) out.run["working-directory"] = wd; |
| 393 | } |
| 394 | } |
| 395 | return out; |
| 396 | } |
| 397 | |
| 398 | function normalizePermissions(c: Context, raw: unknown, path: Seg[]): Permissions | undefined { |
| 399 | if (raw === undefined) return undefined; |
| 400 | if (raw === null) return {}; |
| 401 | if (raw === "read-all" || raw === "write-all") return raw; |
| 402 | if (!isObj(raw)) { |
| 403 | c.error(path, "permissions must be 'read-all', 'write-all' or a mapping of scope: read|write|none"); |
| 404 | return undefined; |
| 405 | } |
| 406 | const out: Record<string, string> = {}; |
| 407 | for (const [scope, level] of Object.entries(raw)) { |
| 408 | if (!PERMISSION_SCOPES.has(scope)) c.warn([...path, scope], `unknown permission scope '${scope}'`); |
| 409 | if (level !== "read" && level !== "write" && level !== "none") { |
| 410 | c.error([...path, scope], `permission '${scope}' must be 'read', 'write' or 'none'`); |
| 411 | continue; |
| 412 | } |
| 413 | out[scope] = level; |
| 414 | } |
| 415 | return out; |
| 416 | } |
| 417 | |
| 418 | function normalizeConcurrency(c: Context, raw: unknown, path: Seg[]): Concurrency | undefined { |
| 419 | if (raw === undefined || raw === null) return undefined; |
| 420 | if (isScalarValue(raw)) return { group: String(raw), cancelInProgress: false }; |
| 421 | if (!isObj(raw) || !isScalarValue(raw.group)) { |
| 422 | c.error(path, "concurrency must be a group string or a mapping with 'group'"); |
| 423 | return undefined; |
| 424 | } |
| 425 | return { group: String(raw.group), cancelInProgress: c.boolOrExpr(raw["cancel-in-progress"], [...path, "cancel-in-progress"], false) }; |
| 426 | } |
| 427 | |
| 428 | function normalizeContainer(c: Context, raw: unknown, path: Seg[]): ContainerSpec | undefined { |
| 429 | if (raw === undefined || raw === null) return undefined; |
| 430 | if (typeof raw === "string") return { image: raw }; |
| 431 | if (!isObj(raw) || typeof raw.image !== "string") { |
| 432 | c.error(path, `${formatPath(path)} must be an image string or a mapping with 'image'`); |
| 433 | return undefined; |
| 434 | } |
| 435 | const out: ContainerSpec = { image: raw.image }; |
| 436 | if (isObj(raw.credentials)) { |
| 437 | out.credentials = {}; |
| 438 | const u = c.str(raw.credentials.username, [...path, "credentials", "username"]); |
| 439 | const p = c.str(raw.credentials.password, [...path, "credentials", "password"]); |
| 440 | if (u !== undefined) out.credentials.username = u; |
| 441 | if (p !== undefined) out.credentials.password = p; |
| 442 | } |
| 443 | if (raw.env !== undefined) out.env = c.strMap(raw.env, [...path, "env"]); |
| 444 | if (raw.ports !== undefined) { |
| 445 | if (Array.isArray(raw.ports) && raw.ports.every((p) => typeof p === "string" || typeof p === "number")) { |
| 446 | out.ports = raw.ports as Array<string | number>; |
| 447 | } else c.error([...path, "ports"], `${formatPath([...path, "ports"])} must be a list of ports`); |
| 448 | } |
| 449 | if (raw.volumes !== undefined) out.volumes = c.strList(raw.volumes, [...path, "volumes"]) ?? []; |
| 450 | const options = c.str(raw.options, [...path, "options"]); |
| 451 | if (options !== undefined) out.options = options; |
| 452 | return out; |
| 453 | } |
| 454 | |
| 455 | function normalizeEnvironment(c: Context, raw: unknown, path: Seg[]): EnvironmentSpec | undefined { |
| 456 | if (raw === undefined || raw === null) return undefined; |
| 457 | if (isScalarValue(raw)) return { name: String(raw) }; |
| 458 | if (!isObj(raw) || !isScalarValue(raw.name)) { |
| 459 | c.error(path, "environment must be a name or a mapping with 'name'"); |
| 460 | return undefined; |
| 461 | } |
| 462 | const env: EnvironmentSpec = { name: String(raw.name) }; |
| 463 | const url = c.str(raw.url, [...path, "url"]); |
| 464 | if (url !== undefined) env.url = url; |
| 465 | return env; |
| 466 | } |
| 467 | |
| 468 | // ---- steps and jobs ---------------------------------------------------------------- |
| 469 | |
| 470 | function normalizeStep(c: Context, raw: unknown, path: Seg[], ids: Set<string>): StepSpec | undefined { |
| 471 | if (!isObj(raw)) { |
| 472 | c.error(path, "step must be a mapping"); |
| 473 | return undefined; |
| 474 | } |
| 475 | c.unknownKeys(raw, STEP_KEYS, path, "step"); |
| 476 | const step: StepSpec = {}; |
| 477 | const hasRun = raw.run !== undefined && raw.run !== null; |
| 478 | const hasUses = raw.uses !== undefined && raw.uses !== null; |
| 479 | if (hasRun && hasUses) c.error(path, "step cannot have both 'run' and 'uses'"); |
| 480 | if (!hasRun && !hasUses) c.error(path, "step must have either 'run' or 'uses'"); |
| 481 | |
| 482 | const id = c.str(raw.id, [...path, "id"]); |
| 483 | if (id !== undefined) { |
| 484 | if (!ID_RE.test(id) && soleExpression(id) === undefined) { |
| 485 | c.error([...path, "id"], `step id '${id}' must start with a letter or '_' and contain only alphanumerics, '-' or '_'`); |
| 486 | } |
| 487 | if (ids.has(id)) c.error([...path, "id"], `duplicate step id '${id}'`); |
| 488 | ids.add(id); |
| 489 | step.id = id; |
| 490 | } |
| 491 | const name = c.str(raw.name, [...path, "name"]); |
| 492 | if (name !== undefined) step.name = name; |
| 493 | const cond = c.str(raw.if, [...path, "if"]); |
| 494 | if (cond !== undefined) step.if = cond; |
| 495 | const run = c.str(raw.run, [...path, "run"]); |
| 496 | if (run !== undefined) step.run = run; |
| 497 | const uses = c.str(raw.uses, [...path, "uses"]); |
| 498 | if (uses !== undefined) { |
| 499 | if (uses.trim() === "") c.error([...path, "uses"], "'uses' must not be empty"); |
| 500 | step.uses = uses; |
| 501 | } |
| 502 | if (raw.with !== undefined && raw.with !== null) step.with = c.strMap(raw.with, [...path, "with"]); |
| 503 | if (raw.env !== undefined && raw.env !== null) step.env = c.strMap(raw.env, [...path, "env"]); |
| 504 | const shell = c.str(raw.shell, [...path, "shell"]); |
| 505 | if (shell !== undefined) step.shell = shell; |
| 506 | const wd = c.str(raw["working-directory"], [...path, "working-directory"]); |
| 507 | if (wd !== undefined) step["working-directory"] = wd; |
| 508 | if (raw["continue-on-error"] !== undefined) { |
| 509 | step["continue-on-error"] = c.boolOrExpr(raw["continue-on-error"], [...path, "continue-on-error"], false); |
| 510 | } |
| 511 | const timeout = c.numOrExpr(raw["timeout-minutes"], [...path, "timeout-minutes"]); |
| 512 | if (timeout !== undefined) step["timeout-minutes"] = timeout; |
| 513 | return step; |
| 514 | } |
| 515 | |
| 516 | function normalizeStrategy(c: Context, raw: unknown, path: Seg[]): Strategy | undefined { |
| 517 | if (raw === undefined || raw === null) return undefined; |
| 518 | if (!isObj(raw)) { |
| 519 | c.error(path, "strategy must be a mapping"); |
| 520 | return undefined; |
| 521 | } |
| 522 | const strategy: Strategy = { failFast: c.boolOrExpr(raw["fail-fast"], [...path, "fail-fast"], true) }; |
| 523 | const maxParallel = c.numOrExpr(raw["max-parallel"], [...path, "max-parallel"]); |
| 524 | if (maxParallel !== undefined) strategy.maxParallel = maxParallel; |
| 525 | if (raw.matrix !== undefined) { |
| 526 | strategy.matrix = raw.matrix; |
| 527 | if (!JSON.stringify(raw.matrix).includes("${{")) { |
| 528 | try { |
| 529 | if (expandMatrix(raw.matrix).length === 0) c.error([...path, "matrix"], "matrix produces no job combinations"); |
| 530 | } catch (e) { |
| 531 | c.error([...path, "matrix"], (e as Error).message); |
| 532 | } |
| 533 | } else if (!isObj(raw.matrix) && (typeof raw.matrix !== "string" || soleExpression(raw.matrix) === undefined)) { |
| 534 | c.error([...path, "matrix"], "matrix must be a mapping or a single ${{ }} expression"); |
| 535 | } |
| 536 | } |
| 537 | return strategy; |
| 538 | } |
| 539 | |
| 540 | function normalizeRunsOn(c: Context, raw: unknown, path: Seg[], job: Job): void { |
| 541 | if (isScalarValue(raw)) job.runsOn = [String(raw)]; |
| 542 | else if (Array.isArray(raw)) job.runsOn = c.strList(raw, path) ?? []; |
| 543 | else if (isObj(raw)) { |
| 544 | if (raw.group !== undefined) { |
| 545 | const g = c.str(raw.group, [...path, "group"]); |
| 546 | if (g !== undefined) job.runsOnGroup = g; |
| 547 | } |
| 548 | job.runsOn = c.strList(raw.labels, [...path, "labels"]) ?? []; |
| 549 | if (raw.group === undefined && raw.labels === undefined) c.error(path, "runs-on mapping must define 'group' and/or 'labels'"); |
| 550 | } else c.error(path, "runs-on must be a label, a list of labels or a mapping with group/labels"); |
| 551 | } |
| 552 | |
| 553 | function normalizeJob(c: Context, key: string, raw: unknown): Job | undefined { |
| 554 | const path: Seg[] = ["jobs", key]; |
| 555 | if (!ID_RE.test(key)) { |
| 556 | c.error(path, `job id '${key}' must start with a letter or '_' and contain only alphanumerics, '-' or '_'`, { key: true }); |
| 557 | } |
| 558 | if (!isObj(raw)) { |
| 559 | c.error(path, `job '${key}' must be a mapping`, { key: true }); |
| 560 | return undefined; |
| 561 | } |
| 562 | const isReusable = raw.uses !== undefined && raw.uses !== null; |
| 563 | c.unknownKeys(raw, isReusable ? REUSABLE_JOB_KEYS : JOB_KEYS, path, isReusable ? "reusable-workflow job" : "job"); |
| 564 | |
| 565 | const job: Job = { |
| 566 | key, |
| 567 | runsOn: [], |
| 568 | needs: c.strList(raw.needs, [...path, "needs"]) ?? [], |
| 569 | env: c.strMap(raw.env, [...path, "env"]), |
| 570 | defaults: normalizeDefaults(c, raw.defaults, [...path, "defaults"]), |
| 571 | outputs: c.strMap(raw.outputs, [...path, "outputs"]), |
| 572 | steps: [], |
| 573 | timeoutMinutes: c.numOrExpr(raw["timeout-minutes"], [...path, "timeout-minutes"]) ?? 360, |
| 574 | continueOnError: c.boolOrExpr(raw["continue-on-error"], [...path, "continue-on-error"], false), |
| 575 | }; |
| 576 | const name = c.str(raw.name, [...path, "name"]); |
| 577 | if (name !== undefined) job.name = name; |
| 578 | const cond = c.str(raw.if, [...path, "if"]); |
| 579 | if (cond !== undefined) job.if = cond; |
| 580 | |
| 581 | if (isReusable) { |
| 582 | const uses = c.str(raw.uses, [...path, "uses"]); |
| 583 | if (uses !== undefined) { |
| 584 | if (!/^\.\/.+\.ya?ml$/.test(uses) && !/^[^/\s]+\/[^/\s]+\/.+\.ya?ml@\S+$/.test(uses)) { |
| 585 | c.error([...path, "uses"], `reusable workflow reference '${uses}' must be './path/to/workflow.yml' or 'owner/repo/path/to/workflow.yml@ref'`); |
| 586 | } |
| 587 | job.uses = uses; |
| 588 | } |
| 589 | if (raw.steps !== undefined) c.error([...path, "steps"], "a job that calls a reusable workflow ('uses') cannot have 'steps'", { key: true }); |
| 590 | if (raw["runs-on"] !== undefined) c.error([...path, "runs-on"], "a job that calls a reusable workflow ('uses') cannot have 'runs-on'", { key: true }); |
| 591 | if (raw.with !== undefined && raw.with !== null) { |
| 592 | if (!isObj(raw.with)) c.error([...path, "with"], "with must be a mapping"); |
| 593 | else job.with = { ...raw.with }; |
| 594 | } |
| 595 | if (raw.secrets !== undefined && raw.secrets !== null) { |
| 596 | job.secrets = raw.secrets === "inherit" ? "inherit" : c.strMap(raw.secrets, [...path, "secrets"]); |
| 597 | } |
| 598 | } else { |
| 599 | if (raw["runs-on"] === undefined || raw["runs-on"] === null) { |
| 600 | c.error(path, `job '${key}' is missing 'runs-on'`, { key: true }); |
| 601 | } else { |
| 602 | normalizeRunsOn(c, raw["runs-on"], [...path, "runs-on"], job); |
| 603 | } |
| 604 | if (!Array.isArray(raw.steps)) { |
| 605 | c.error(raw.steps === undefined ? path : [...path, "steps"], `job '${key}' must have a list of 'steps'`, { key: true }); |
| 606 | } else { |
| 607 | if (raw.steps.length === 0) c.error([...path, "steps"], `job '${key}' must have at least one step`, { key: true }); |
| 608 | const ids = new Set<string>(); |
| 609 | raw.steps.forEach((s, i) => { |
| 610 | const step = normalizeStep(c, s, [...path, "steps", i], ids); |
| 611 | if (step) job.steps.push(step); |
| 612 | }); |
| 613 | } |
| 614 | const container = normalizeContainer(c, raw.container, [...path, "container"]); |
| 615 | if (container) job.container = container; |
| 616 | if (raw.services !== undefined && raw.services !== null) { |
| 617 | if (!isObj(raw.services)) c.error([...path, "services"], "services must be a mapping"); |
| 618 | else { |
| 619 | job.services = {}; |
| 620 | for (const [name, svc] of Object.entries(raw.services)) { |
| 621 | const spec = normalizeContainer(c, svc, [...path, "services", name]); |
| 622 | if (spec) job.services[name] = spec; |
| 623 | } |
| 624 | } |
| 625 | } |
| 626 | const environment = normalizeEnvironment(c, raw.environment, [...path, "environment"]); |
| 627 | if (environment) job.environment = environment; |
| 628 | } |
| 629 | |
| 630 | const strategy = normalizeStrategy(c, raw.strategy, [...path, "strategy"]); |
| 631 | if (strategy) job.strategy = strategy; |
| 632 | const permissions = normalizePermissions(c, raw.permissions, [...path, "permissions"]); |
| 633 | if (permissions) job.permissions = permissions; |
| 634 | const concurrency = normalizeConcurrency(c, raw.concurrency, [...path, "concurrency"]); |
| 635 | if (concurrency) job.concurrency = concurrency; |
| 636 | return job; |
| 637 | } |
| 638 | |
| 639 | // ---- expression validation --------------------------------------------------------- |
| 640 | |
| 641 | /** Checks every string for unclosed `${{` and expression syntax errors. */ |
| 642 | function checkExpressions(c: Context, value: unknown, path: Seg[]): void { |
| 643 | if (typeof value === "string") { |
| 644 | const isIf = path[0] === "jobs" && path[path.length - 1] === "if" && (path.length === 3 || (path.length === 5 && path[2] === "steps")); |
| 645 | if (isIf && !value.includes("${{")) { |
| 646 | if (value.trim() !== "") { |
| 647 | const err = checkExpressionSyntax(value); |
| 648 | if (err) c.error(path, `Invalid expression: ${err}`); |
| 649 | } |
| 650 | return; |
| 651 | } |
| 652 | if (!value.includes("${{")) return; |
| 653 | try { |
| 654 | for (const part of splitTemplate(value)) { |
| 655 | if (part.kind !== "expr") continue; |
| 656 | const err = checkExpressionSyntax(part.expr); |
| 657 | if (err) c.error(path, `Invalid expression \${{ ${part.expr} }}: ${err}`); |
| 658 | } |
| 659 | } catch (e) { |
| 660 | if (e instanceof TemplateError) c.error(path, e.message); |
| 661 | else throw e; |
| 662 | } |
| 663 | } else if (Array.isArray(value)) { |
| 664 | value.forEach((v, i) => checkExpressions(c, v, [...path, i])); |
| 665 | } else if (isObj(value)) { |
| 666 | for (const [k, v] of Object.entries(value)) checkExpressions(c, v, [...path, k]); |
| 667 | } |
| 668 | } |
| 669 | |
| 670 | // ---- entry point ------------------------------------------------------------------- |
| 671 | |
| 672 | /** |
| 673 | * Parses and validates a workflow file. Errors carry YAML line/column; entries |
| 674 | * whose message starts with `warning:` are non-fatal. `workflow` is returned |
| 675 | * only when there are no (non-warning) errors. |
| 676 | */ |
| 677 | export function parseWorkflow(source: string, filePath: string): { workflow?: Workflow; errors: WorkflowError[] } { |
| 678 | const lc = new LineCounter(); |
| 679 | const doc = parseDocument(source, { lineCounter: lc, merge: true, prettyErrors: false }); |
| 680 | if (doc.errors.length > 0) { |
| 681 | return { |
| 682 | errors: doc.errors.map((e) => { |
| 683 | const pos = e.linePos?.[0] ?? lc.linePos(e.pos[0]); |
| 684 | return { path: "", ...(pos ? { line: pos.line, col: pos.col } : {}), message: `YAML syntax error: ${e.message.split("\n")[0]}` }; |
| 685 | }), |
| 686 | }; |
| 687 | } |
| 688 | const c = new Context(doc, lc); |
| 689 | let raw: unknown; |
| 690 | try { |
| 691 | raw = doc.toJS({ maxAliasCount: 10000 }); |
| 692 | } catch (e) { |
| 693 | return { errors: [{ path: "", message: `YAML error: ${(e as Error).message}` }] }; |
| 694 | } |
| 695 | if (!isObj(raw)) { |
| 696 | c.error([], raw === null || raw === undefined ? "workflow file is empty" : "workflow must be a mapping"); |
| 697 | return { errors: c.errors }; |
| 698 | } |
| 699 | |
| 700 | c.unknownKeys(raw, TOP_LEVEL_KEYS, [], "top-level"); |
| 701 | const wf: Workflow = { |
| 702 | path: filePath, |
| 703 | on: {}, |
| 704 | env: c.strMap(raw.env, ["env"]), |
| 705 | defaults: normalizeDefaults(c, raw.defaults, ["defaults"]), |
| 706 | jobs: {}, |
| 707 | raw, |
| 708 | }; |
| 709 | const name = c.str(raw.name, ["name"]); |
| 710 | if (name !== undefined) wf.name = name; |
| 711 | const runName = c.str(raw["run-name"], ["run-name"]); |
| 712 | if (runName !== undefined) wf.runName = runName; |
| 713 | |
| 714 | if (raw.on === undefined || raw.on === null) c.error(["on"], "workflow is missing the 'on' trigger section"); |
| 715 | else wf.on = normalizeOn(c, raw.on); |
| 716 | |
| 717 | const permissions = normalizePermissions(c, raw.permissions, ["permissions"]); |
| 718 | if (permissions) wf.permissions = permissions; |
| 719 | const concurrency = normalizeConcurrency(c, raw.concurrency, ["concurrency"]); |
| 720 | if (concurrency) wf.concurrency = concurrency; |
| 721 | |
| 722 | if (raw.jobs === undefined || raw.jobs === null) { |
| 723 | c.error(["jobs"], "workflow is missing the 'jobs' section"); |
| 724 | } else if (!isObj(raw.jobs)) { |
| 725 | c.error(["jobs"], "'jobs' must be a mapping of job id to job"); |
| 726 | } else { |
| 727 | if (Object.keys(raw.jobs).length === 0) c.error(["jobs"], "'jobs' must define at least one job", { key: true }); |
| 728 | for (const [key, rawJob] of Object.entries(raw.jobs)) { |
| 729 | const job = normalizeJob(c, key, rawJob); |
| 730 | if (job) wf.jobs[key] = job; |
| 731 | } |
| 732 | for (const e of jobOrder(wf).errors) c.errorDotted(e.path, e.message); |
| 733 | } |
| 734 | |
| 735 | checkExpressions(c, raw, []); |
| 736 | |
| 737 | c.errors.sort((a, b) => (a.line ?? 0) - (b.line ?? 0) || (a.col ?? 0) - (b.col ?? 0)); |
| 738 | const fatal = c.errors.some((e) => !isWarning(e)); |
| 739 | return fatal ? { errors: c.errors } : { workflow: wf, errors: c.errors }; |
| 740 | } |