Feat/name status similarity (#1025)

* Add `similarity` to the `DiffResultNameStatusFile` interface, used when getting a log/diff with the `--name-status` option.

Closes #993

* Changeset

Author: steveukx

.changeset/hot-hornets-clean.md

@@ -0,0 +1,5 @@
+---
+'simple-git': minor
+---
+
+Add `similarity` to the `DiffResultNameStatusFile` interface used when fetching log/diff with the `--name-status` option.

simple-git/src/lib/parsers/parse-diff-summary.ts

@@ -89,7 +89,7 @@ const nameOnlyParser = [
 const nameStatusParser = [
    new LineParser<DiffResult>(
       /([ACDMRTUXB])([0-9]{0,3})\t(.[^\t]*)(\t(.[^\t]*))?$/,
-      (result, [status, _similarity, from, _to, to]) => {
+      (result, [status, similarity, from, _to, to]) => {
          result.changed++;
          result.files.push({
             file: to ?? from,
@@ -99,6 +99,7 @@ const nameStatusParser = [
             binary: false,
             status: orVoid(isDiffNameStatus(status) && status),
             from: orVoid(!!to && from !== to && from),
+            similarity: asNumber(similarity),
          });
       }
    ),

simple-git/test/integration/log-name-status.spec.ts

@@ -26,24 +26,30 @@ describe('log-name-status', function () {
       const actual = await newSimpleGit(context.root).log(['--name-status']);
 
       expect(actual.all).toEqual([
-         mockListLogLine('two', { b: [DiffNameStatus.RENAMED, 'a'] }),
+         mockListLogLine('two', { b: [DiffNameStatus.RENAMED, 100, 'a'] }),
          mockListLogLine('one', { a: [DiffNameStatus.ADDED] }),
       ]);
    });
 });
 
-function mockListLogLine(message: string, changes: Record<string, [DiffNameStatus, string?]>) {
-   const files: DiffResultTextFile[] = Object.entries(changes).map(([file, [status, from]]) => {
-      return {
-         binary: false,
-         changes: 0,
-         deletions: 0,
-         file,
-         insertions: 0,
-         status,
-         from,
-      };
-   });
+function mockListLogLine(
+   message: string,
+   changes: Record<string, [DiffNameStatus, number?, string?]>
+) {
+   const files: DiffResultTextFile[] = Object.entries(changes).map(
+      ([file, [status, similarity = 0, from]]) => {
+         return {
+            binary: false,
+            changes: 0,
+            deletions: 0,
+            file,
+            insertions: 0,
+            similarity,
+            status,
+            from,
+         };
+      }
+   );
    return like({
       message,
       diff: like({ changed: files.length, deletions: 0, insertions: 0, files }),

simple-git/test/unit/diff.spec.ts

@@ -329,6 +329,7 @@ describe('diff', () => {
                      insertions: 0,
                      deletions: 0,
                      binary: false,
+                     similarity: 0,
                      status: 'M',
                      from: undefined,
                   },
@@ -338,6 +339,7 @@ describe('diff', () => {
                      insertions: 0,
                      deletions: 0,
                      binary: false,
+                     similarity: 100,
                      status: 'R',
                      from: 'from',
                   },

simple-git/typings/response.d.ts

@@ -155,6 +155,7 @@ export interface DiffResultBinaryFile {
 export interface DiffResultNameStatusFile extends DiffResultTextFile {
    status?: DiffNameStatus;
    from?: string;
+   similarity: number;
 }
 
 export interface DiffResult {