feat: add new files

src/parser/__snapshots__/parse-git-diff.test.ts.snap

@@ -0,0 +1,113 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`parseGitDiff should parse new file. 1`] = `
+Object {
+  "files": Array [
+    Object {
+      "chunks": Array [
+        Object {
+          "changes": Array [
+            Object {
+              "content": "{",
+              "lineAfter": 1,
+              "type": "Added",
+            },
+            Object {
+              "content": "  \\"name\\": \\"parse-git-diff-test\\",",
+              "lineAfter": 2,
+              "type": "Added",
+            },
+            Object {
+              "content": "  \\"version\\": \\"1.0.0\\",",
+              "lineAfter": 3,
+              "type": "Added",
+            },
+            Object {
+              "content": "  \\"description\\": \\"\\",",
+              "lineAfter": 4,
+              "type": "Added",
+            },
+            Object {
+              "content": "  \\"main\\": \\"index.js\\",",
+              "lineAfter": 5,
+              "type": "Added",
+            },
+            Object {
+              "content": "  \\"scripts\\": {",
+              "lineAfter": 6,
+              "type": "Added",
+            },
+            Object {
+              "content": "    \\"build\\": \\"tsc\\"",
+              "lineAfter": 7,
+              "type": "Added",
+            },
+            Object {
+              "content": "  },",
+              "lineAfter": 8,
+              "type": "Added",
+            },
+            Object {
+              "content": "  \\"author\\": \\"\\",",
+              "lineAfter": 9,
+              "type": "Added",
+            },
+            Object {
+              "content": "  \\"license\\": \\"ISC\\",",
+              "lineAfter": 10,
+              "type": "Added",
+            },
+            Object {
+              "content": "  \\"dependencies\\": {",
+              "lineAfter": 11,
+              "type": "Added",
+            },
+            Object {
+              "content": "    \\"parse-git-diff\\": \\"0.0.3\\"",
+              "lineAfter": 12,
+              "type": "Added",
+            },
+            Object {
+              "content": "  },",
+              "lineAfter": 13,
+              "type": "Added",
+            },
+            Object {
+              "content": "  \\"devDependencies\\": {",
+              "lineAfter": 14,
+              "type": "Added",
+            },
+            Object {
+              "content": "    \\"typescript\\": \\"^4.4.4\\"",
+              "lineAfter": 15,
+              "type": "Added",
+            },
+            Object {
+              "content": "  }",
+              "lineAfter": 16,
+              "type": "Added",
+            },
+            Object {
+              "content": "}",
+              "lineAfter": 17,
+              "type": "Added",
+            },
+          ],
+          "rangeAfter": Object {
+            "lines": 17,
+            "start": 1,
+          },
+          "rangeBefore": Object {
+            "lines": 0,
+            "start": 0,
+          },
+          "type": "Chunk",
+        },
+      ],
+      "path": "parse-git-diff-test/packages.json",
+      "type": "AddedFile",
+    },
+  ],
+  "type": "GitDiff",
+}
+`;

src/parser/parse-extended-header.ts

@@ -3,13 +3,16 @@ import type Context from './context';
 const UNHANDLED_EXTENDED_HEADERS = new Set([
   'index',
   'old',
-  'new',
   'copy',
   'rename',
   'similarity',
   'dissimilarity',
 ]);
 
+const startsWith = (str: string, target: string) => {
+  return str.indexOf(target) === 0;
+};
+
 export default function parseExtendedHeader(ctx: Context) {
   const line = ctx.getCurLine();
   const type = line.slice(0, line.indexOf(' '));
@@ -20,10 +23,13 @@ export default function parseExtendedHeader(ctx: Context) {
       type: 'unhandled',
     };
   }
-  switch (type) {
-    case 'deleted':
-      ctx.nextLine();
-      return 'deleted';
+  if (startsWith(line, 'deleted ')) {
+    ctx.nextLine();
+    return 'deleted';
+  } else if (startsWith(line, 'new file ')) {
+    ctx.nextLine();
+    return 'new file';
   }
+
   return null;
 }

src/parser/parse-file-changes.ts

@@ -23,12 +23,14 @@ function parseFileChange(ctx: Context): AnyFileChange | undefined {
   ctx.nextLine();
 
   let isDeleted = false;
+  let isNew = false;
   while (!ctx.isEof()) {
     const extHeader = parseExtendedHeader(ctx);
     if (!extHeader) {
       break;
     }
     if (extHeader === 'deleted') isDeleted = true;
+    if (extHeader === 'new file') isNew = true;
   }
 
   const changeMarkers = parseChangeMarkers(ctx);
@@ -45,6 +47,12 @@ function parseFileChange(ctx: Context): AnyFileChange | undefined {
       chunks,
       path: changeMarkers.deleted,
     };
+  } else if (isNew) {
+    return {
+      type: 'AddedFile',
+      chunks,
+      path: changeMarkers.added,
+    };
   } else {
     return {
       type: 'ChangedFile',

src/parser/parse-git-diff.test.ts

@@ -0,0 +1,37 @@
+import { createContext } from '../test-utils';
+import parseGitDiff from './parse-git-diff';
+
+describe('parseGitDiff', () => {
+  it('should parse new file.', () => {
+    // prettier-ignore
+    const src =
+`diff --git a/parse-git-diff-test/packages.json b/parse-git-diff-test/packages.json
+new file mode 100644
+index 0000000..5515040
+--- /dev/null
++++ b/parse-git-diff-test/packages.json
+@@ -0,0 +1,17 @@
++{
++  "name": "parse-git-diff-test",
++  "version": "1.0.0",
++  "description": "",
++  "main": "index.js",
++  "scripts": {
++    "build": "tsc"
++  },
++  "author": "",
++  "license": "ISC",
++  "dependencies": {
++    "parse-git-diff": "0.0.3"
++  },
++  "devDependencies": {
++    "typescript": "^4.4.4"
++  }
++}`;
+
+    const result = parseGitDiff(src);
+
+    expect(result).not.toBe(null);
+    expect(result).toMatchSnapshot();
+  });
+});

src/parser/parse-git-diff.ts

@@ -4,10 +4,10 @@ import parseFileChanges from './parse-file-changes';
 
 export default function parseGitDiff(diff: string): GitDiff {
   const ctx = new Context(diff);
-  const changedFiles = parseFileChanges(ctx);
+  const files = parseFileChanges(ctx);
 
   return {
     type: 'GitDiff',
-    changedFiles,
+    files,
   };
 }

src/types/changes.ts

@@ -40,8 +40,8 @@ export interface DeletedFile extends BaseFileChange<'DeletedFile'> {
 }
 
 export interface RenamedFile extends BaseFileChange<'RenamedFile'> {
-  from: string;
-  to: string;
+  pathBefore: string;
+  pathAfter: string;
 }
 
 export type AnyFileChange = ChangedFile | AddedFile | DeletedFile | RenamedFile;

src/types/nodes.ts

@@ -2,5 +2,5 @@ import type { Base } from './common';
 import type { AnyFileChange } from './changes';
 
 export interface GitDiff extends Base<'GitDiff'> {
-  changedFiles: AnyFileChange[];
+  files: AnyFileChange[];
 }