minor symfony#18775 Fix computation of PR diffs for component matrix lines (nicolas-grekas)

This PR was merged into the 2.3 branch.

Discussion
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Fix computation of PR diffs for component matrix lines

| Q             | A
| ------------- | ---
| Branch?       | 2.3
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

Validated on https://travis-ci.org/symfony/symfony/jobs/130061271 who fails otherwise.

Commits
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e7a3ae7 Fix computation of PR diffs for component matrix lines

Author: fabpot

.travis.php

@@ -1,20 +1,19 @@
 <?php
 
 if (4 > $_SERVER['argc']) {
-    echo "Usage: commit-range branch dir1 dir2 ... dirN\n";
+    echo "Usage: branch dir1 dir2 ... dirN\n";
     exit(1);
 }
 
 $dirs = $_SERVER['argv'];
 array_shift($dirs);
-$range = array_shift($dirs);
 $branch = array_shift($dirs);
 
 $packages = array();
 $flags = PHP_VERSION_ID >= 50400 ? JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE : 0;
 
 foreach ($dirs as $dir) {
-    if (!`git diff --name-only $range -- $dir`) {
+    if (!`git diff --name-only $branch...HEAD -- $dir`) {
         continue;
     }
     echo "$dir\n";

.travis.yml

@@ -58,7 +58,7 @@ before_install:
 install:
     - if [[ ! $skip ]]; then COMPONENTS=$(find src/Symfony -mindepth 3 -type f -name phpunit.xml.dist -printf '%h\n'); fi
     # Create local composer packages for each patched components and reference them in composer.json files when cross-testing components
-    - if [[ ! $skip && $deps ]]; then php .travis.php $TRAVIS_COMMIT_RANGE $TRAVIS_BRANCH $COMPONENTS; fi
+    - if [[ ! $skip && $deps ]]; then php .travis.php $TRAVIS_BRANCH $COMPONENTS; fi
     # For the master branch when deps=high, the version before master is checked out and tested with the locally patched components
     - if [[ $deps = high && $TRAVIS_BRANCH = master ]]; then SYMFONY_VERSION=$(git ls-remote --heads | grep -o '/[1-9].*' | tail -n 1 | sed s/.//); else SYMFONY_VERSION=$(cat composer.json | grep '^ *"dev-master". *"[1-9]' | grep -o '[0-9.]*'); fi
     - if [[ $deps = high && $TRAVIS_BRANCH = master ]]; then git fetch origin $SYMFONY_VERSION; git checkout -m FETCH_HEAD; COMPONENTS=$(find src/Symfony -mindepth 3 -type f -name phpunit.xml.dist -printf '%h\n'); ./phpunit install; fi