make logging of git diff unconditional, remove parameter

src/model/input.js

@@ -77,12 +77,6 @@ class Input {
     return input === 'true' ? 'true' : 'false';
   }
 
-  static get logDiffIfDirty() {
-    const input = core.getInput('logDiffIfDirty') || 'false';
-
-    return input === 'true' ? 'true' : 'false';
-  }
-
   static get customParameters() {
     return core.getInput('customParameters') || '';
   }

src/model/input.test.js

@@ -232,24 +232,6 @@ describe('Input', () => {
     });
   });
 
-  describe('logDiffIfDirty', () => {
-    it('returns the default value', () => {
-      expect(Input.logDiffIfDirty).toStrictEqual('false');
-    });
-
-    it('returns true when string true is passed', () => {
-      const spy = jest.spyOn(core, 'getInput').mockReturnValue('true');
-      expect(Input.logDiffIfDirty).toStrictEqual('true');
-      expect(spy).toHaveBeenCalledTimes(1);
-    });
-
-    it('returns false when string false is passed', () => {
-      const spy = jest.spyOn(core, 'getInput').mockReturnValue('false');
-      expect(Input.logDiffIfDirty).toStrictEqual('false');
-      expect(spy).toHaveBeenCalledTimes(1);
-    });
-  });
-
   describe('customParameters', () => {
     it('returns the default value', () => {
       expect(Input.customParameters).toStrictEqual('');

src/model/versioning.js

@@ -13,10 +13,6 @@ export default class Versioning {
     return Input.allowDirtyBuild === 'true';
   }
 
-  static get logDiffIfDirty() {
-    return Input.logDiffIfDirty === 'true';
-  }
-
   static get strategies() {
     return { None: 'None', Semantic: 'Semantic', Tag: 'Tag', Custom: 'Custom' };
   }
@@ -50,6 +46,20 @@ export default class Versioning {
     return process.env.GITHUB_SHA;
   }
 
+  /**
+   * Maximum number of lines to print when logging the git diff
+   */
+  static get maxDiffLines() {
+    return 60;
+  }
+
+  /**
+   * Log up to maxDiffLines of the git diff.
+   */
+  static async logDiff() {
+    this.git(['--no-pager', 'diff', '|', 'head', '-n', this.maxDiffLines.toString()]);
+  }
+
   /**
    * Regex to parse version description into separate fields
    */
@@ -99,6 +109,8 @@ export default class Versioning {
   static async generateSemanticVersion() {
     await this.fetch();
 
+    await this.logDiff();
+
     if ((await this.isDirty()) && !this.isDirtyAllowed) {
       throw new Error('Branch is dirty. Refusing to base semantic version on uncommitted changes');
     }
@@ -182,12 +194,7 @@ export default class Versioning {
   static async isDirty() {
     const output = await this.git(['status', '--porcelain']);
 
-    const dirty = output !== '';
-    if (dirty && this.logDiffIfDirty) {
-      await this.git(['--no-pager', 'diff']);
-    }
-
-    return dirty;
+    return output !== '';
   }
 
   /**

src/model/versioning.test.js

@@ -100,32 +100,26 @@ describe('Versioning', () => {
     });
   });
 
-  describe('logDiffIfDirty', () => {
-    it('does not throw', () => {
-      expect(() => Versioning.logDiffIfDirty).not.toThrow();
-    });
-
-    it('returns false by default', () => {
-      expect(Versioning.logDiffIfDirty).toStrictEqual(false);
-    });
-
-    it('does not call git diff if logDiffIfDirty is false', async () => {
-      jest.spyOn(core, 'getInput').mockReturnValue('false');
-      const gitSpy = jest.spyOn(Versioning, 'git').mockReturnValue('');
-      await Versioning.isDirty();
-      expect(gitSpy).toHaveBeenCalledTimes(1);
-      expect(gitSpy).toBeCalledWith(['status', '--porcelain']);
-    });
-
-    it('calls git diff if logDiffIfDirty is true', async () => {
+  describe('logging git diff', () => {
+    it('calls git diff', async () => {
+      // allowDirtyBuild: true
       jest.spyOn(core, 'getInput').mockReturnValue('true');
+      jest.spyOn(Versioning, 'isDirty').mockResolvedValue(false);
+      jest.spyOn(Versioning, 'fetch').mockResolvedValue(undefined);
+      jest.spyOn(Versioning, 'hasAnyVersionTags').mockResolvedValue(true);
+      jest
+        .spyOn(Versioning, 'parseSemanticVersion')
+        .mockResolvedValue({ tag: 'mocktag', commits: 'abcdef', hash: '75822BCAF' });
+      const logDiffSpy = jest.spyOn(Versioning, 'logDiff');
       const gitSpy = jest
         .spyOn(Versioning, 'git')
         .mockReturnValue('There is a diff actually! \n M My_Dirty_File.txt');
-      await Versioning.isDirty();
-      expect(gitSpy).toHaveBeenCalledTimes(2);
-      expect(Versioning.git.mock.calls[0][0].indexOf('status')).toBeGreaterThan(-1);
-      expect(Versioning.git.mock.calls[1][0].indexOf('diff')).toBeGreaterThan(-1);
+
+      await Versioning.generateSemanticVersion();
+
+      expect(logDiffSpy).toHaveBeenCalledTimes(1);
+      expect(gitSpy).toHaveBeenCalledTimes(1);
+      expect(Versioning.git.mock.calls[0][0].indexOf('diff')).toBeGreaterThan(-1);
     });
   });