1 files changed, 104 insertions, 0 deletions

diff --git a/packages/turbo-ignore/src/checkCommit.ts b/packages/turbo-ignore/src/checkCommit.ts
new file mode 100644
index 0000000..af6108e
--- /dev/null
+++ b/packages/turbo-ignore/src/checkCommit.ts
@@ -0,0 +1,104 @@
+import { execSync } from "child_process";
+
+export const skipAllCommits = [
+  `[skip ci]`,
+  `[ci skip]`,
+  `[no ci]`,
+  `[skip vercel]`,
+  `[vercel skip]`,
+];
+
+export const forceAllCommits = [`[vercel deploy]`, `[vercel build]`];
+
+export function skipWorkspaceCommits({ workspace }: { workspace: string }) {
+  return [`[vercel skip ${workspace}]`];
+}
+
+export function forceWorkspaceCommits({ workspace }: { workspace: string }) {
+  return [`[vercel deploy ${workspace}]`, `[vercel build ${workspace}]`];
+}
+
+export function getCommitDetails() {
+  // if we're on Vercel, use the provided commit message
+  if (process.env.VERCEL === "1") {
+    if (process.env.VERCEL_GIT_COMMIT_MESSAGE) {
+      return process.env.VERCEL_GIT_COMMIT_MESSAGE;
+    }
+  }
+  return execSync("git show -s --format=%B").toString();
+}
+
+export function checkCommit({ workspace }: { workspace: string }): {
+  result: "skip" | "deploy" | "continue" | "conflict";
+  scope: "global" | "workspace";
+  reason: string;
+} {
+  const commitMessage = getCommitDetails();
+  const findInCommit = (commit: string) => commitMessage.includes(commit);
+
+  // check workspace specific messages first
+  const forceWorkspaceDeploy = forceWorkspaceCommits({ workspace }).find(
+    findInCommit
+  );
+  const forceWorkspaceSkip = skipWorkspaceCommits({ workspace }).find(
+    findInCommit
+  );
+
+  if (forceWorkspaceDeploy && forceWorkspaceSkip) {
+    return {
+      result: "conflict",
+      scope: "workspace",
+      reason: `Conflicting commit messages found: ${forceWorkspaceDeploy} and ${forceWorkspaceSkip}`,
+    };
+  }
+
+  if (forceWorkspaceDeploy) {
+    return {
+      result: "deploy",
+      scope: "workspace",
+      reason: `Found commit message: ${forceWorkspaceDeploy}`,
+    };
+  }
+
+  if (forceWorkspaceSkip) {
+    return {
+      result: "skip",
+      scope: "workspace",
+      reason: `Found commit message: ${forceWorkspaceSkip}`,
+    };
+  }
+
+  // check global messages last
+  const forceDeploy = forceAllCommits.find(findInCommit);
+  const forceSkip = skipAllCommits.find(findInCommit);
+
+  if (forceDeploy && forceSkip) {
+    return {
+      result: "conflict",
+      scope: "global",
+      reason: `Conflicting commit messages found: ${forceDeploy} and ${forceSkip}`,
+    };
+  }
+
+  if (forceDeploy) {
+    return {
+      result: "deploy",
+      scope: "global",
+      reason: `Found commit message: ${forceDeploy}`,
+    };
+  }
+
+  if (forceSkip) {
+    return {
+      result: "skip",
+      scope: "global",
+      reason: `Found commit message: ${forceSkip}`,
+    };
+  }
+
+  return {
+    result: "continue",
+    scope: "global",
+    reason: `No deploy or skip string found in commit message.`,
+  };
+}