Ensure BC of API, compat with roave/you-are-using-it-wrong, completeness of composer.json (#2140)

* Test against `roave/you-are-using-it-wrong`

* Added CI step to ensure BC of declared API

* Added step to ensure `composer.json` has all used deps

* Including CI check tools as dev dependencies

* Typo fix: s/backwards/backward

* Run `roave/backward-compatibility-check` off an isolated location with no other dependencies

* Run `test-with-real-projects` task with PHP 7.4 as base runtime

* Run `testing-with-real-projects` also against `ocramius/proxy-manager`

`ocramius/proxy-manager` is an extremely heavy `vimeo/psalm` consumer,
and relies on a lot of the templated types system to generate real
types for proxies produced by runtime evaluation.

.circleci/config.yml

@@ -4,6 +4,9 @@ executors:
   php-72:
     docker:
       - image: thecodingmachine/php:7.2-v2-cli
+  php-74:
+    docker:
+      - image: thecodingmachine/php:7.4-v3-cli
 jobs:
   install-and-self-analyse:
     executor: php-72
@@ -90,7 +93,7 @@ jobs:
           paths:
             - build/psalm.phar
   test-with-real-projects:
-    executor: php-72
+    executor: php-74
     steps:
       - checkout # used here just for the side effect of loading the github public ssh key so we can clone other stuff
       - attach_workspace:

.travis.yml

@@ -62,6 +62,20 @@ jobs:
       script:
         - vendor/bin/phpcs
 
+    - stage: Ensure API BC
+      php: 7.4
+      env: DEPS="high"
+      script:
+        - mkdir /tmp/bc-check && composer require --working-dir=/tmp/bc-check --dev roave/backward-compatibility-check:^4.0.0
+        - /tmp/bc-check/vendor/bin/roave-backward-compatibility-check
+
+    - stage: Ensure no transient used dependencies
+      php: 7.3
+      env: DEPS="high"
+      script:
+        - composer require --dev maglnet/composer-require-checker:^2.0.0
+        - ./vendor/bin/composer-require-checker check ./composer.json
+
     - stage: Phar build
       php: 7.3
       env: DEPS="high"

bin/test-with-real-projects.sh

@@ -20,3 +20,18 @@ git clone git@github.com:muglug/collections.git
 cd collections
 composer install
 ~/project/psalm --monochrome --show-info=false
+
+cd /tmp/testing-with-real-projects
+
+git clone git@github.com:Ocramius/ProxyManager.git
+cd ProxyManager
+composer install
+~/project/build/psalm.phar --monochrome
+
+cd /tmp/testing-with-real-projects
+
+git clone git@github.com:roave/you-are-using-it-wrong.git
+cd you-are-using-it-wrong
+composer install
+~/project/build/psalm.phar --monochrome
+./vendor/bin/phpunit