From 815d0f3cbe44a78953cd7cf7f1f929d68469b5cf Mon Sep 17 00:00:00 2001
From: James Garbutt <43081j@users.noreply.github.com>
Date: Sat, 27 Sep 2025 10:20:32 +0100
Subject: [PATCH] feat: add `exclude-packages` input

Using this, you can specify a RegExp which will be used to exclude
package names from metrics.
---
 README.md   |  1 +
 action.yml  |  3 +++
 main.js     | 57 ++++++++++++++++++++++++++++++++++++-----------------
 src/main.ts | 55 ++++++++++++++++++++++++++++++++++++---------------
 4 files changed, 82 insertions(+), 34 deletions(-)

diff --git a/README.md b/README.md
index 5ce9866..00aac2e 100644
--- a/README.md
+++ b/README.md
@@ -44,6 +44,7 @@ jobs:
 | `dependency-threshold` | Threshold for warning about significant increase in number of dependencies | No | `10` |
 | `size-threshold` | Threshold (in bytes) for warning about significant increase in package size | No | `100000` |
 | `duplicate-threshold` | Threshold for warning about packages with multiple versions | No | `1` |
+| `exclude-packages` | Regular expression pattern to exclude packages from analysis | No | None |
 | `base-packages` | Glob pattern for base branch pack files (e.g., `"./base-packs/*.tgz"`) | No | None |
 | `source-packages` | Glob pattern for source branch pack files (e.g., `"./source-packs/*.tgz"`) | No | None |
 | `pack-size-threshold` | Threshold (in bytes) for warning about significant increase in total pack size | No | `50000` |
diff --git a/action.yml b/action.yml
index 3129bbe..3a4143d 100644
--- a/action.yml
+++ b/action.yml
@@ -40,6 +40,9 @@ inputs:
     description: 'Threshold for warning about packages with multiple versions'
     required: false
     default: '1'
+  exclude-packages:
+    description: 'Regular expression pattern to exclude packages from analysis'
+    required: false
 
 runs:
   using: node24
diff --git a/main.js b/main.js
index b01edba..08c9656 100644
--- a/main.js
+++ b/main.js
@@ -19744,10 +19744,10 @@ Support boolean input list: \`true | True | TRUE | false | False | FALSE\``);
       (0, command_1.issueCommand)("error", (0, utils_1.toCommandProperties)(properties), message instanceof Error ? message.toString() : message);
     }
     exports.error = error;
-    function warning(message, properties = {}) {
+    function warning2(message, properties = {}) {
       (0, command_1.issueCommand)("warning", (0, utils_1.toCommandProperties)(properties), message instanceof Error ? message.toString() : message);
     }
-    exports.warning = warning;
+    exports.warning = warning2;
     function notice(message, properties = {}) {
       (0, command_1.issueCommand)("notice", (0, utils_1.toCommandProperties)(properties), message instanceof Error ? message.toString() : message);
     }
@@ -24406,6 +24406,23 @@ async function run() {
     const lockfilePath = detectLockfile(workspacePath);
     const token = core4.getInput("github-token", { required: true });
     const prNumber = parseInt(core4.getInput("pr-number", { required: true }), 10);
+    const dependencyThreshold = parseInt(
+      core4.getInput("dependency-threshold") || "10",
+      10
+    );
+    const sizeThreshold = parseInt(
+      core4.getInput("size-threshold") || "100000",
+      10
+    );
+    const duplicateThreshold = parseInt(
+      core4.getInput("duplicate-threshold") || "1",
+      10
+    );
+    const packSizeThreshold = parseInt(
+      core4.getInput("pack-size-threshold") || "50000",
+      10
+    );
+    const excludePackages = core4.getInput("exclude-packages");
     if (Number.isNaN(prNumber) || prNumber < 1) {
       core4.info("No valid pull request number was found. Skipping.");
       return;
@@ -24437,22 +24454,26 @@ async function run() {
     }
     const currentDeps = parseLockfile(lockfilePath, currentPackageLock);
     const baseDeps = parseLockfile(lockfilePath, basePackageLock);
-    const dependencyThreshold = parseInt(
-      core4.getInput("dependency-threshold") || "10",
-      10
-    );
-    const sizeThreshold = parseInt(
-      core4.getInput("size-threshold") || "100000",
-      10
-    );
-    const duplicateThreshold = parseInt(
-      core4.getInput("duplicate-threshold") || "1",
-      10
-    );
-    const packSizeThreshold = parseInt(
-      core4.getInput("pack-size-threshold") || "50000",
-      10
-    );
+    if (excludePackages) {
+      try {
+        const excludeRegex = new RegExp(excludePackages);
+        core4.info(`Excluding packages matching pattern: ${excludePackages}`);
+        for (const packageName of currentDeps.keys()) {
+          if (excludeRegex.test(packageName)) {
+            currentDeps.delete(packageName);
+          }
+        }
+        for (const packageName of baseDeps.keys()) {
+          if (excludeRegex.test(packageName)) {
+            baseDeps.delete(packageName);
+          }
+        }
+      } catch (err) {
+        core4.warning(
+          `Invalid exclude-packages regex pattern: ${excludePackages}`
+        );
+      }
+    }
     core4.info(`Dependency threshold set to ${dependencyThreshold}`);
     core4.info(`Size threshold set to ${formatBytes(sizeThreshold)}`);
     core4.info(`Duplicate threshold set to ${duplicateThreshold}`);
diff --git a/src/main.ts b/src/main.ts
index ef9b90b..9b6481e 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -47,6 +47,23 @@ async function run(): Promise<void> {
     const lockfilePath = detectLockfile(workspacePath);
     const token = core.getInput('github-token', {required: true});
     const prNumber = parseInt(core.getInput('pr-number', {required: true}), 10);
+    const dependencyThreshold = parseInt(
+      core.getInput('dependency-threshold') || '10',
+      10
+    );
+    const sizeThreshold = parseInt(
+      core.getInput('size-threshold') || '100000',
+      10
+    );
+    const duplicateThreshold = parseInt(
+      core.getInput('duplicate-threshold') || '1',
+      10
+    );
+    const packSizeThreshold = parseInt(
+      core.getInput('pack-size-threshold') || '50000',
+      10
+    );
+    const excludePackages = core.getInput('exclude-packages');
 
     if (Number.isNaN(prNumber) || prNumber < 1) {
       core.info('No valid pull request number was found. Skipping.');
@@ -84,22 +101,28 @@ async function run(): Promise<void> {
     const currentDeps = parseLockfile(lockfilePath, currentPackageLock);
     const baseDeps = parseLockfile(lockfilePath, basePackageLock);
 
-    const dependencyThreshold = parseInt(
-      core.getInput('dependency-threshold') || '10',
-      10
-    );
-    const sizeThreshold = parseInt(
-      core.getInput('size-threshold') || '100000',
-      10
-    );
-    const duplicateThreshold = parseInt(
-      core.getInput('duplicate-threshold') || '1',
-      10
-    );
-    const packSizeThreshold = parseInt(
-      core.getInput('pack-size-threshold') || '50000',
-      10
-    );
+    // Filter out excluded packages if pattern is provided
+    if (excludePackages) {
+      try {
+        const excludeRegex = new RegExp(excludePackages);
+        core.info(`Excluding packages matching pattern: ${excludePackages}`);
+
+        for (const packageName of currentDeps.keys()) {
+          if (excludeRegex.test(packageName)) {
+            currentDeps.delete(packageName);
+          }
+        }
+        for (const packageName of baseDeps.keys()) {
+          if (excludeRegex.test(packageName)) {
+            baseDeps.delete(packageName);
+          }
+        }
+      } catch (err) {
+        core.warning(
+          `Invalid exclude-packages regex pattern: ${excludePackages}`
+        );
+      }
+    }
 
     core.info(`Dependency threshold set to ${dependencyThreshold}`);
     core.info(`Size threshold set to ${formatBytes(sizeThreshold)}`);