Do not checkout the branch passed to CommitFileViaConsole

CHANGELOG.md

@@ -22,7 +22,7 @@ All notable changes to this project will be documented in this file, in reverse
 
 ### Fixed
 
-- Nothing.
+- [#41](https://github.com/laminas/automatic-releases/pull/41) fixes an issue that occurred when attempting to commit changes to the `CHANGELOG.md`.
 
 ## 1.1.0 - 2020-08-06
 

src/Changelog/BumpAndCommitChangelogVersionViaKeepAChangelog.php

@@ -66,11 +66,14 @@ public function __invoke(
         Assert::stringNotEmpty($newVersion);
         $bumper->updateChangelog($newVersion);
 
+        $message = sprintf(self::COMMIT_TEMPLATE, $newVersion, self::CHANGELOG_FILE, $newVersion);
+        Assert::notEmpty($message);
+
         ($this->commitFile)(
             $repositoryDirectory,
             $sourceBranch,
             self::CHANGELOG_FILE,
-            sprintf(self::COMMIT_TEMPLATE, $newVersion, self::CHANGELOG_FILE, $newVersion)
+            $message
         );
 
         ($this->push)($repositoryDirectory, $sourceBranch->name());

src/Changelog/CommitReleaseChangelogViaKeepAChangelog.php

@@ -15,6 +15,7 @@
 use Phly\KeepAChangelog\Version\SetDateForChangelogReleaseListener;
 use Psr\Log\LoggerInterface;
 use Symfony\Component\Console\Output\NullOutput;
+use Webmozart\Assert\Assert;
 
 use function file_exists;
 use function sprintf;
@@ -69,11 +70,14 @@ public function __invoke(
             return;
         }
 
+        $message = sprintf(self::COMMIT_TEMPLATE, $versionString, self::CHANGELOG_FILE);
+        Assert::notEmpty($message);
+
         ($this->commitFile)(
             $repositoryDirectory,
             $sourceBranch,
             self::CHANGELOG_FILE,
-            sprintf(self::COMMIT_TEMPLATE, $versionString, self::CHANGELOG_FILE)
+            $message
         );
 
         ($this->push)($repositoryDirectory, $sourceBranch->name());

src/Git/CommitFile.php

@@ -8,6 +8,11 @@
 
 interface CommitFile
 {
+    /**
+     * @psalm-param non-empty-string $repositoryDirectory
+     * @psalm-param non-empty-string $filename
+     * @psalm-param non-empty-string $commitMessage
+     */
     public function __invoke(
         string $repositoryDirectory,
         BranchName $sourceBranch,

src/Git/CommitFileViaConsole.php

@@ -6,6 +6,10 @@
 
 use Laminas\AutomaticReleases\Git\Value\BranchName;
 use Symfony\Component\Process\Process;
+use Webmozart\Assert\Assert;
+
+use function sprintf;
+use function trim;
 
 final class CommitFileViaConsole implements CommitFile
 {
@@ -15,8 +19,7 @@ public function __invoke(
         string $filename,
         string $commitMessage
     ): void {
-        (new Process(['git', 'checkout', $sourceBranch->name()], $repositoryDirectory))
-            ->mustRun();
+        $this->assertWeAreOnBranch($sourceBranch, $repositoryDirectory, $filename);
 
         (new Process(['git', 'add', $filename], $repositoryDirectory))
             ->mustRun();
@@ -26,4 +29,25 @@ public function __invoke(
             $repositoryDirectory
         ))->mustRun();
     }
+
+    /**
+     * @param non-empty-string $repositoryDirectory
+     * @param non-empty-string $filename
+     */
+    private function assertWeAreOnBranch(
+        BranchName $expectedBranch,
+        string $repositoryDirectory,
+        string $filename
+    ): void {
+        $process = new Process(['git', 'branch', '--show-current'], $repositoryDirectory);
+        $process->mustRun();
+
+        $output = trim($process->getOutput());
+
+        Assert::same($output, $expectedBranch->name(), sprintf(
+            'Cannot commit file %s to branch %s, as a different branch is currently checked out.',
+            $filename,
+            $expectedBranch->name()
+        ));
+    }
 }

test/unit/Git/CommitFileViaConsoleTest.php

@@ -4,6 +4,7 @@
 
 namespace Laminas\AutomaticReleases\Test\Unit\Git;
 
+use InvalidArgumentException;
 use Laminas\AutomaticReleases\Git\CommitFileViaConsole;
 use Laminas\AutomaticReleases\Git\Value\BranchName;
 use PHPUnit\Framework\TestCase;
@@ -74,4 +75,24 @@ public function testAddsAndCommitsFileProvidedWithAuthorAndCommitMessageProvided
         self::assertStringContainsString($commitMessage, $commitDetails);
         self::assertStringContainsString('diff --git a/README.md b/README.md', $commitDetails);
     }
+
+    public function testFailsIfNotOnCorrectBranch(): void
+    {
+        (new Process(
+            ['git', 'switch', '-c', '1.1.x'],
+            $this->checkout
+        ))
+            ->mustRun();
+
+        $filename = sprintf('%s/README.md', $this->checkout);
+        file_put_contents(
+            $filename,
+            "# README\n\nThis is a test file to test commits from laminas/automatic-releases."
+        );
+
+        $this->expectException(InvalidArgumentException::class);
+        $this->expectExceptionMessage('different branch');
+        (new CommitFileViaConsole())
+            ->__invoke($this->checkout, BranchName::fromName('1.0.x'), 'README.md', 'commit message');
+    }
 }