feat: add post-run Gitea lifecycle (#5)

2026-07-24 02:05:30 +05:30
parent 7974bd5f3e
commit a17d53cb41
16 changed files with 1281 additions and 7 deletions
@@ -0,0 +1,250 @@
+import { Effect, Schema } from "effect";
+
+const MeaningfulString = Schema.String.check(
+  Schema.makeFilter((value) => value.trim().length > 0, {
+    expected: "a non-empty string",
+  })
+);
+
+export const GitBranchName = MeaningfulString.pipe(
+  Schema.check(
+    Schema.makeFilter(
+      (value) =>
+        !value.startsWith("-") &&
+        !value.includes("..") &&
+        !value.includes(" ") &&
+        !value.includes("~") &&
+        !value.includes("^") &&
+        !value.includes(":") &&
+        !value.includes("\\"),
+      { expected: "a valid Git branch name" }
+    )
+  )
+);
+export type GitBranchName = typeof GitBranchName.Type;
+
+export const GitStatusEntry = Schema.Struct({
+  index: Schema.String,
+  path: MeaningfulString,
+  raw: Schema.String,
+  worktree: Schema.String,
+});
+export type GitStatusEntry = typeof GitStatusEntry.Type;
+
+export const GitWorkspaceInspection = Schema.Struct({
+  branch: GitBranchName,
+  diff: Schema.String,
+  hasChanges: Schema.Boolean,
+  status: Schema.Array(GitStatusEntry),
+});
+export type GitWorkspaceInspection = typeof GitWorkspaceInspection.Type;
+
+export const GitVerification = Schema.Literals(["passed", "failed", "not-run"]);
+export type GitVerification = typeof GitVerification.Type;
+
+export const PullRequestStatus = Schema.Literals(["open", "closed", "merged"]);
+export type PullRequestStatus = typeof PullRequestStatus.Type;
+
+export const PullRequestMetadata = Schema.Struct({
+  baseBranch: GitBranchName,
+  branch: GitBranchName,
+  number: Schema.Int.check(Schema.isGreaterThan(0)),
+  status: PullRequestStatus,
+  url: Schema.String.check(
+    Schema.makeFilter(
+      (value) => {
+        try {
+          return new URL(value).protocol.startsWith("http");
+        } catch {
+          return false;
+        }
+      },
+      { expected: "a valid HTTP pull request URL" }
+    )
+  ),
+});
+export type PullRequestMetadata = typeof PullRequestMetadata.Type;
+
+export const GitLifecycleStatus = Schema.Literals([
+  "no_changes",
+  "committed",
+  "pushed",
+  "pull_request_open",
+  "failed",
+]);
+export type GitLifecycleStatus = typeof GitLifecycleStatus.Type;
+
+export const GitLifecycleResult = Schema.Struct({
+  baseBranch: GitBranchName,
+  branch: GitBranchName,
+  commitSha: Schema.optional(MeaningfulString),
+  pullRequest: Schema.optional(PullRequestMetadata),
+  status: GitLifecycleStatus,
+});
+export type GitLifecycleResult = typeof GitLifecycleResult.Type;
+
+export const GitLifecycleDecision = Schema.Literals([
+  "finish",
+  "commit",
+  "push",
+  "create_pull_request",
+  "manual_merge",
+]);
+export type GitLifecycleDecision = typeof GitLifecycleDecision.Type;
+
+export const GitLifecycleDecisionInput = Schema.Struct({
+  baseBranch: GitBranchName,
+  commitSha: Schema.optional(MeaningfulString),
+  inspection: GitWorkspaceInspection,
+  pullRequest: Schema.optional(PullRequestMetadata),
+  pushed: Schema.Boolean,
+  verification: GitVerification,
+});
+export type GitLifecycleDecisionInput = typeof GitLifecycleDecisionInput.Type;
+
+export const GitLifecycleDecisionResult = Schema.Struct({
+  decision: GitLifecycleDecision,
+  status: GitLifecycleStatus,
+});
+export type GitLifecycleDecisionResult = typeof GitLifecycleDecisionResult.Type;
+
+export const GitLifecycleErrorReason = Schema.Literals([
+  "Authentication",
+  "CommandFailed",
+  "InvalidInput",
+  "InvalidBranch",
+  "NoChanges",
+  "InvalidPullRequest",
+  "RemoteRejected",
+  "RequestFailed",
+  "VerificationRequired",
+]);
+export type GitLifecycleErrorReason = typeof GitLifecycleErrorReason.Type;
+
+export class GitLifecycleError extends Schema.TaggedErrorClass<GitLifecycleError>()(
+  "GitLifecycleError",
+  {
+    message: Schema.String,
+    reason: GitLifecycleErrorReason,
+  }
+) {}
+
+const invalidInput = (message: string) =>
+  new GitLifecycleError({ message, reason: "InvalidInput" });
+
+export const parseGitStatus = (rawStatus: string): GitStatusEntry[] =>
+  rawStatus
+    .split("\n")
+    .filter((line) => line.length > 0)
+    .map((raw) => ({
+      index: raw.slice(0, 1),
+      path: raw.slice(3).trim(),
+      raw,
+      worktree: raw.slice(1, 2),
+    }));
+
+export const inspectGitWorkspace = Effect.fn("Git.inspectWorkspace")(
+  function* inspectGitWorkspace(input: unknown) {
+    const decoded = yield* Schema.decodeUnknownEffect(
+      Schema.Struct({
+        branch: GitBranchName,
+        diff: Schema.String,
+        status: Schema.String,
+      })
+    )(input).pipe(Effect.mapError((cause) => invalidInput(cause.message)));
+
+    const status = parseGitStatus(decoded.status);
+    return {
+      branch: decoded.branch,
+      diff: decoded.diff,
+      hasChanges: status.length > 0 || decoded.diff.length > 0,
+      status,
+    } satisfies GitWorkspaceInspection;
+  }
+);
+
+export const decideGitLifecycle = Effect.fn("Git.decideLifecycle")(
+  function* decideGitLifecycle(input: unknown) {
+    const decoded = yield* Schema.decodeUnknownEffect(
+      GitLifecycleDecisionInput
+    )(input).pipe(Effect.mapError((cause) => invalidInput(cause.message)));
+
+    if (decoded.inspection.branch === decoded.baseBranch) {
+      return yield* Effect.fail(
+        new GitLifecycleError({
+          message: `Refusing to publish the default branch ${decoded.baseBranch}`,
+          reason: "InvalidBranch",
+        })
+      );
+    }
+
+    if (decoded.verification !== "passed") {
+      return yield* Effect.fail(
+        new GitLifecycleError({
+          message: "Verified changes are required before publishing",
+          reason: "VerificationRequired",
+        })
+      );
+    }
+
+    if (!decoded.inspection.hasChanges && decoded.commitSha === undefined) {
+      return {
+        decision: "finish" as const,
+        status: "no_changes" as const,
+      } satisfies GitLifecycleDecisionResult;
+    }
+
+    if (decoded.commitSha === undefined) {
+      return {
+        decision: "commit" as const,
+        status: "committed" as const,
+      } satisfies GitLifecycleDecisionResult;
+    }
+
+    if (!decoded.pushed) {
+      return {
+        decision: "push" as const,
+        status: "pushed" as const,
+      } satisfies GitLifecycleDecisionResult;
+    }
+
+    if (decoded.pullRequest === undefined) {
+      return {
+        decision: "create_pull_request" as const,
+        status: "pull_request_open" as const,
+      } satisfies GitLifecycleDecisionResult;
+    }
+
+    return {
+      decision: "manual_merge" as const,
+      status: "pull_request_open" as const,
+    } satisfies GitLifecycleDecisionResult;
+  }
+);
+
+export const validatePullRequestMetadata = Effect.fn(
+  "Git.validatePullRequestMetadata"
+)(function* validatePullRequestMetadata(input: unknown) {
+  const metadata = yield* Schema.decodeUnknownEffect(PullRequestMetadata)(
+    input
+  ).pipe(Effect.mapError((cause) => invalidInput(cause.message)));
+
+  if (metadata.branch === metadata.baseBranch) {
+    return yield* Effect.fail(
+      new GitLifecycleError({
+        message: "A pull request must target a different branch",
+        reason: "InvalidPullRequest",
+      })
+    );
+  }
+
+  return metadata;
+});
+
+export const makeCommitMessage = (
+  issueNumber: number,
+  title: string
+): string => {
+  const normalizedTitle = title.replaceAll(/\s+/gu, " ").trim();
+  return `feat(issue-${issueNumber}): ${normalizedTitle}`.slice(0, 120);
+};