From bfa36c60873e3ffabedf45184ae74af0df566de6 Mon Sep 17 00:00:00 2001
From: Paul Hatcherian <1835615+PaulHatch@users.noreply.github.com>
Date: Sat, 5 Sep 2020 08:39:02 -0400
Subject: [PATCH] Fix change tracking when no previous tag exists

---
 dist/index.js |  9 +++++++--
 index.js      |  9 +++++++--
 index.test.js | 15 ++++++++++++++-
 3 files changed, 28 insertions(+), 5 deletions(-)

diff --git a/dist/index.js b/dist/index.js
index f5e8f04..549e18d 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -1091,8 +1091,13 @@ async function run() {
     const log = await cmd(logCommand);
 
     if (changePath !== '') {
-      const changedFiles = await cmd(`git diff --name-only ${(root === '' ? branch : `${root}..${branch}`)} -- ${changePath}`);
-      changed = changedFiles.length > 0;
+      if (root === '') {
+        const changedFiles = await cmd(`git log --name-only --oneline ${branch} -- ${changePath}`);
+        changed = changedFiles.length > 0;
+      } else {
+        const changedFiles = await cmd(`git diff --name-only ${root}..${branch} -- ${changePath}`);
+        changed = changedFiles.length > 0;
+      }
     }
 
     let history = log
diff --git a/index.js b/index.js
index 202db2f..29a6684 100644
--- a/index.js
+++ b/index.js
@@ -145,8 +145,13 @@ async function run() {
     const log = await cmd(logCommand);
 
     if (changePath !== '') {
-      const changedFiles = await cmd(`git diff --name-only ${(root === '' ? branch : `${root}..${branch}`)} -- ${changePath}`);
-      changed = changedFiles.length > 0;
+      if (root === '') {
+        const changedFiles = await cmd(`git log --name-only --oneline ${branch} -- ${changePath}`);
+        changed = changedFiles.length > 0;
+      } else {
+        const changedFiles = await cmd(`git diff --name-only ${root}..${branch} -- ${changePath}`);
+        changed = changedFiles.length > 0;
+      }
     }
 
     let history = log
diff --git a/index.test.js b/index.test.js
index e85f9cf..c596113 100644
--- a/index.test.js
+++ b/index.test.js
@@ -331,6 +331,19 @@ test('Changes to monitored path is false when changes are not in path', () => {
     repo.clean();
 });
 
+test('Changes can be detected without tags', () => {
+    const repo = createTestRepo({ tag_prefix: '' }); // 0.0.0
+
+    repo.makeCommit('Initial Commit'); // 0.0.1
+    repo.exec('mkdir project1');
+    repo.makeCommit(`Second Commit`, 'project1'); // 0.0.2
+    const result = repo.runAction({ change_path: "project1" });
+
+    expect(result).toMatch('::set-output name=changed::true');
+
+    repo.clean();
+});
+
 test('Changes to multiple monitored path is true when change is in path', () => {
     const repo = createTestRepo({ tag_prefix: '' }); // 0.0.0
 
@@ -339,7 +352,7 @@ test('Changes to multiple monitored path is true when change is in path', () =>
     repo.exec('mkdir project1');
     repo.exec('mkdir project2');
     repo.makeCommit(`Second Commit`, 'project2'); // 0.0.2
-    const result = repo.runAction({ change_path: "./project1 ./project2" });
+    const result = repo.runAction({ change_path: "project1 project2" });
 
     expect(result).toMatch('::set-output name=changed::true');