[buildkite] Add more logging and debug information to PR pipeline gen…

…eration

.buildkite/scripts/pull-request/pipeline.generate.ts

@@ -6,11 +6,16 @@ import { generatePipelines } from "./pipeline";
 const pipelines = generatePipelines();
 
 for (const pipeline of pipelines) {
-  if (!process.env.CI) {
-    // Just for local debugging purposes
-    console.log("");
-    console.log(stringify(pipeline));
-  } else {
+  const yaml = stringify(pipeline);
+
+  console.log("--- Generated pipeline");
+  console.log(yaml);
+
+  // Only do the pipeline upload if we're actually in CI
+  // This lets us run the tool locally and see the output
+  if (process.env.CI) {
+    console.log("--- Uploading pipeline");
+
     execSync(`buildkite-agent pipeline upload`, {
       input: stringify(pipeline),
       stdio: ["pipe", "inherit", "inherit"],

.buildkite/scripts/pull-request/pipeline.sh

@@ -2,5 +2,8 @@
 
 set -euo pipefail
 
+echo --- Installing bun
 npm install -g bun
+
+echo --- Generating pipeline
 bun .buildkite/scripts/pull-request/pipeline.generate.ts

.buildkite/scripts/pull-request/pipeline.ts

@@ -116,19 +116,25 @@ export const generatePipelines = (
     .filter((x) => x);
 
   if (!changedFiles?.length) {
+    console.log("Doing git fetch and getting merge-base");
     const mergeBase = execSync(
       `git fetch origin ${process.env["GITHUB_PR_TARGET_BRANCH"]}; git merge-base origin/${process.env["GITHUB_PR_TARGET_BRANCH"]} HEAD`,
       { cwd: PROJECT_ROOT }
     )
       .toString()
       .trim();
 
+    console.log(`Merge base: ${mergeBase}`);
+
     const changedFilesOutput = execSync(`git diff --name-only ${mergeBase}`, { cwd: PROJECT_ROOT }).toString().trim();
 
     changedFiles = changedFilesOutput
       .split("\n")
       .map((x) => x.trim())
       .filter((x) => x);
+
+    console.log("Changed files (first 50):");
+    console.log(changedFiles.slice(0, 50).join("\n"));
   }
 
   let filters: ((pipeline: EsPipeline) => boolean)[] = [