Fix: Drop support for composer/composer:^1.0.0

.github/workflows/integrate.yaml

@@ -201,10 +201,6 @@ jobs:
           - "7.4"
           - "8.0"
 
-        composer-version:
-          - "1"
-          - "2"
-
         dependencies:
           - "lowest"
           - "locked"
@@ -221,14 +217,10 @@ jobs:
           extensions: "${{ env.PHP_EXTENSIONS }}"
           ini-values: "${{ env.PHP_INI_VALUES }}"
           php-version: "${{ matrix.php-version }}"
-          tools: "composer:v${{ matrix.composer-version }}"
 
       - name: "Set up problem matchers for phpunit/phpunit"
         run: "echo \"::add-matcher::${{ runner.tool_cache }}/phpunit.json\""
 
-      - name: "Show composer version"
-        run: "composer --version"
-
       - name: "Determine composer cache directory"
         uses: "./.github/actions/composer/composer/determine-cache-directory"
 

CHANGELOG.md

@@ -8,6 +8,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 For a full diff see [`2.15.0...main`][2.15.0...main].
 
+### Changed
+
+* Dropped support for `composer/composer:^1.0.0` ([#807]), by [@localheinz]
+
 ## [`2.15.0`][2.15.0]
 
 For a full diff see [`2.14.0...2.15.0`][2.14.0...2.15.0].
@@ -732,6 +736,7 @@ For a full diff see [`81bc3a8...0.1.0`][81bc3a8...0.1.0].
 [#744]: https://github.com/ergebnis/composer-normalize/pull/744
 [#750]: https://github.com/ergebnis/composer-normalize/pull/750
 [#754]: https://github.com/ergebnis/composer-normalize/pull/754
+[#807]: https://github.com/ergebnis/composer-normalize/pull/807
 
 [@core23]: https://github.com/core23
 [@dependabot]: https://github.com/dependabot

composer.json

@@ -25,7 +25,7 @@
     "localheinz/diff": "^1.1.1"
   },
   "require-dev": {
-    "composer/composer": "^1.10.22 || ^2.0.13",
+    "composer/composer": "^2.0.13",
     "ergebnis/license": "^1.1.0",
     "ergebnis/php-cs-fixer-config": "^2.14.0",
     "ergebnis/phpstan-rules": "~0.15.3",