minor symfony#41328 Improve .travis.yml (nicolas-grekas)

This PR was merged into the 4.4 branch.

Discussion
----------

Improve .travis.yml

| Q             | A
| ------------- | ---
| Branch?       | 4.4
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| Tickets       | -
| License       | MIT
| Doc PR        | -

Follow up of symfony#41293

- For the highest branch (6.0 right now), when deps=high, the version before it is checked out (5.4) and tested with the locally patched components (6.0)
- For `*.4` branches, aka when the current branch version has not the same major version number as the next one, in addition to testing with the next major as deps (6.0 deps on patched-5.4), we also checkout the previous major and test it with the locally patched components (aka patched-5.4 deps on 4.4).

Commits
-------

2620da2 Improve .travis.yml

Author: nicolas-grekas

.travis.yml

@@ -50,12 +50,14 @@ before_install:
       set -e
       stty cols 120
       cp .github/composer-config.json "$(composer config home)/config.json"
+      git config --global user.email ""
+      git config --global user.name "Symfony"
       export PHPUNIT=$(readlink -f ./phpunit)
       export PHPUNIT_X="$PHPUNIT --exclude-group tty,benchmark,intl-data"
       export COMPOSER_UP='composer update --no-progress --ansi'
       export COMPONENTS=$(find src/Symfony -mindepth 2 -type f -name phpunit.xml.dist -printf '%h\n' | sort)
-      export SYMFONY_DEPRECATIONS_HELPER=max[indirect]=170
       export SYMFONY_FEATURE_BRANCH=$(curl -s https://flex.symfony.com/versions.json | jq -r '."dev-name"')
+      export SYMFONY_VERSIONS=$(git ls-remote -q --heads | cut -f2 | grep -o '/[1-9][0-9]*\.[0-9].*' | sort -V)
 
       nanoseconds () {
           local cmd="date"
@@ -180,11 +182,6 @@ install:
 
     - |
       # Create local composer packages for each patched components and reference them in composer.json files when cross-testing components
-      git config --global user.email ""
-      git config --global user.name "Symfony"
-
-      SYMFONY_VERSIONS=$(git ls-remote -q --heads);
-
       if [[ ! $deps ]]; then
           php .github/build-packages.php HEAD^ $SYMFONY_VERSION src/Symfony/Bridge/PhpUnit
       else
@@ -201,18 +198,18 @@ install:
       fi
 
     - |
-      # For the feature-branch, when deps=high, the version before it is checked out and tested with the locally patched components
-      if [[ $deps = high && $TRAVIS_BRANCH = $SYMFONY_FEATURE_BRANCH ]]; then
+      # For the highest branch, when deps=high, the version before it is checked out and tested with the locally patched components
+      if [[ $deps = high && $SYMFONY_VERSION = $(echo "$SYMFONY_VERSIONS" | tail -n 1 | sed s/.//) ]]; then
           export FLIP='^'
-          export SYMFONY_VERSION=$(echo "$SYMFONY_VERSIONS" | grep -o '/[1-9]\.[0-9].*' | tail -n 1 | sed s/.//) &&
+          export SYMFONY_VERSION=$(echo "$SYMFONY_VERSIONS" | grep -FB1 /$SYMFONY_VERSION | head -n 1 | sed s/.//) &&
           git fetch --depth=2 origin $SYMFONY_VERSION &&
           git checkout -m FETCH_HEAD &&
           export COMPONENTS=$(find src/Symfony -mindepth 2 -type f -name phpunit.xml.dist -printf '%h\n' | sort)
       fi
 
     - |
       # Skip the phpunit-bridge on bugfix-branches when $deps is empty
-      if [[ ! $deps && ! $TRAVIS_BRANCH = $SYMFONY_FEATURE_BRANCH ]]; then
+      if [[ ! $deps && $SYMFONY_VERSION != $SYMFONY_FEATURE_BRANCH ]]; then
           export COMPONENTS=$(find src/Symfony -mindepth 2 -type f -name phpunit.xml.dist -not -wholename '*/Bridge/PhpUnit/*' -printf '%h\n' | sort)
       fi
 
@@ -227,7 +224,7 @@ install:
 
     - |
       # Legacy tests are skipped when deps=high and when the current branch version has not the same major version number as the next one
-      [[ $deps = high && ${SYMFONY_VERSION%.*} != $(echo "$SYMFONY_VERSIONS" | cut -f2 | grep -FA1 /$SYMFONY_VERSION | tail -n 1 | grep -o '[0-9]*' | head -n 1) ]] && export LEGACY=,legacy
+      [[ $deps = high && $SYMFONY_VERSION = *.4 ]] && export LEGACY=,legacy
 
       export COMPOSER_ROOT_VERSION=$SYMFONY_VERSION.x-dev
       if [[ $deps ]]; then mv composer.json.phpunit composer.json; fi
@@ -264,7 +261,7 @@ install:
               (cd src/Symfony/Component/HttpFoundation; mv composer.bak composer.json)
               COMPONENTS=$(git diff --name-only src/ | grep composer.json || true)
 
-              if [[ $COMPONENTS && $LEGACY && ! $TRAVIS_BRANCH = $SYMFONY_FEATURE_BRANCH && $TRAVIS_PULL_REQUEST != false && $(echo "$SYMFONY_VERSIONS" | cut -f2 | grep -FA1 /$SYMFONY_VERSION | tail -n 1) = $SYMFONY_FEATURE_BRANCH ]]; then
+              if [[ $COMPONENTS && $SYMFONY_VERSION = *.4 && $TRAVIS_PULL_REQUEST != false ]]; then
                   export FLIP='^'
                   SYMFONY_VERSION=$(echo $SYMFONY_VERSION | awk '{print $1 - 1}')
                   echo -e "\\n\\e[33;1mChecking out Symfony $SYMFONY_VERSION and running tests with patched components as deps\\e[0m"