Add "--dry-run" to bump command (#11047)

doc/03-cli.md

@@ -356,6 +356,7 @@ are local to the library and do not affect consumers of the package.
 
 * **--dev-only:** Only bump requirements in "require-dev".
 * **--no-dev-only:** Only bump requirements in "require".
+* **--dry-run:** Outputs the packages to bump, but will not execute anything.
 
 ## reinstall
 

src/Composer/Command/BumpCommand.php

@@ -47,6 +47,7 @@ final class BumpCommand extends BaseCommand
                 new InputArgument('packages', InputArgument::IS_ARRAY | InputArgument::OPTIONAL, 'Optional package name(s) to restrict which packages are bumped.', null, $this->suggestRootRequirement()),
                 new InputOption('dev-only', 'D', InputOption::VALUE_NONE, 'Only bump requirements in "require-dev".'),
                 new InputOption('no-dev-only', 'R', InputOption::VALUE_NONE, 'Only bump requirements in "require".'),
+                new InputOption('dry-run', null, InputOption::VALUE_NONE, 'Outputs the packages to bump, but will not execute anything.'),
             ])
             ->setHelp(
                 <<<EOT
@@ -124,12 +125,12 @@ EOT
 
         $bumper = new VersionBumper();
         $tasks = [];
-        if (!$input->getOption('no-dev-only')) {
-            $tasks['require-dev'] = $composer->getPackage()->getDevRequires();
-        }
         if (!$input->getOption('dev-only')) {
             $tasks['require'] = $composer->getPackage()->getRequires();
         }
+        if (!$input->getOption('no-dev-only')) {
+            $tasks['require-dev'] = $composer->getPackage()->getDevRequires();
+        }
 
         $packagesFilter = $input->getArgument('packages');
         if (count($packagesFilter) > 0) {
@@ -170,7 +171,9 @@ EOT
             }
         }
 
-        if (!$this->updateFileCleanly($composerJson, $updates)) {
+        $dryRun = $input->getOption('dry-run');
+
+        if (!$dryRun && !$this->updateFileCleanly($composerJson, $updates)) {
             $composerDefinition = $composerJson->read();
             foreach ($updates as $key => $packages) {
                 foreach ($packages as $package => $version) {
@@ -182,12 +185,21 @@ EOT
 
         $changeCount = array_sum(array_map('count', $updates));
         if ($changeCount > 0) {
+            if ($dryRun) {
+                $io->write('<info>' . $composerJsonPath . ' would be updated with:</info>');
+                foreach ($updates as $requireType => $packages) {
+                    foreach ($packages as $package => $version) {
+                        $io->write(sprintf('<info> - %s.%s: %s</info>', $requireType, $package, $version));
+                    }
+                }
+            } else {
                 $io->write('<info>' . $composerJsonPath . ' has been updated (' . $changeCount . ' changes).</info>');
+            }
         } else {
             $io->write('<info>No requirements to update in '.$composerJsonPath.'.</info>');
         }
 
-        if ($composer->getLocker()->isLocked() && $changeCount > 0) {
+        if (!$dryRun && $composer->getLocker()->isLocked() && $changeCount > 0) {
             $contents = file_get_contents($composerJson->getPath());
             if (false === $contents) {
                 throw new \RuntimeException('Unable to read '.$composerJson->getPath().' contents to update the lock file hash.');
@@ -198,6 +210,10 @@ EOT
             $lock->write($lockData);
         }
 
+        if ($dryRun && $changeCount > 0) {
+            return self::ERROR_GENERIC;
+        }
+
         return 0;
     }
 

tests/Composer/Test/Command/BumpCommandTest.php

@@ -23,7 +23,7 @@ class BumpCommandTest extends TestCase
      * @param array<mixed> $command
      * @param array<mixed> $expected
      */
-    public function testBump(array $composerJson, array $command, array $expected, bool $lock = true): void
+    public function testBump(array $composerJson, array $command, array $expected, bool $lock = true, int $exitCode = 0): void
     {
         $this->initTempComposer($composerJson);
 
@@ -41,7 +41,7 @@ class BumpCommandTest extends TestCase
         }
 
         $appTester = $this->getApplicationTester();
-        $appTester->run(array_merge(['command' => 'bump'], $command));
+        $this->assertSame($exitCode, $appTester->run(array_merge(['command' => 'bump'], $command)));
 
         $json = new JsonFile('./composer.json');
         $this->assertSame($expected, $json->read());
@@ -153,5 +153,53 @@ class BumpCommandTest extends TestCase
             ],
             false,
         ];
+
+        yield 'bump with --dry-run with packages to bump' => [
+            [
+                'require' => [
+                    'first/pkg' => '^2.0',
+                    'second/pkg' => '3.*',
+                ],
+                'require-dev' => [
+                    'dev/pkg' => '~2.0',
+                ],
+            ],
+            ['--dry-run' => true],
+            [
+                'require' => [
+                    'first/pkg' => '^2.0',
+                    'second/pkg' => '3.*',
+                ],
+                'require-dev' => [
+                    'dev/pkg' => '~2.0',
+                ],
+            ],
+            true,
+            1,
+        ];
+
+        yield 'bump with --dry-run without packages to bump' => [
+            [
+                'require' => [
+                    'first/pkg' => '^2.3.4',
+                    'second/pkg' => '^3.4',
+                ],
+                'require-dev' => [
+                    'dev/pkg' => '^2.3.4.5',
+                ],
+            ],
+            ['--dry-run' => true],
+            [
+                'require' => [
+                    'first/pkg' => '^2.3.4',
+                    'second/pkg' => '^3.4',
+                ],
+                'require-dev' => [
+                    'dev/pkg' => '^2.3.4.5',
+                ],
+            ],
+            true,
+            0,
+        ];
     }
 }