fix(ci): isolate integration tests from Fabric proxy

Author: realFlowControl

.gitlab/generate-appsec.php

@@ -100,7 +100,7 @@
       -DCMAKE_CXX_FLAGS='-stdlib=libc++' -DCMAKE_CXX_LINK_FLAGS='-stdlib=libc++'
 	  -DDD_APPSEC_TESTING=ON -DBOOST_CACHE_PREFIX=$CI_PROJECT_DIR/boost-cache
       -DENABLE_ASAN=$ASAN_FLAG"
-    # The Fabric proxy changes curl test behavior and leaks HTTP_PROXY into $_SERVER.
+    # The Fabric proxy changes network failure semantics and leaks HTTP_PROXY into $_SERVER.
     - unset HTTP_PROXY HTTPS_PROXY http_proxy https_proxy ALL_PROXY all_proxy
     - ASAN_OPTIONS=malloc_context_size=0 make -j 4 xtest
 
@@ -359,6 +359,8 @@
         -DBOOST_CACHE_PREFIX="$CI_PROJECT_DIR/boost-cache"
     - |
       export PATH=$PATH:$HOME/.cargo/bin
+      # The Fabric proxy changes network failure semantics and leaks HTTP_PROXY into $_SERVER.
+      unset HTTP_PROXY HTTPS_PROXY http_proxy https_proxy ALL_PROXY all_proxy
       LLVM_PROFILE_FILE="/tmp/cov-ext/%p.profraw" \
         VERBOSE=1 make -j 4 xtest
     - VERBOSE=1 make -j 4 ddappsec_helper_test

.gitlab/generate-package.php

@@ -1217,6 +1217,8 @@ function appsec_image_from_tag_mapping(string $tag): string
     - pecl install datadog_trace.tgz
     - echo "extension=ddtrace.so" | sudo tee $(php -i | awk -F"=> " '/Scan this dir for additional .ini files/ {print $2}')/ddtrace.ini
     - php --ri=ddtrace
+    # The Fabric proxy changes network failure semantics in PECL tests.
+    - unset HTTP_PROXY HTTPS_PROXY http_proxy https_proxy ALL_PROXY all_proxy
     - TERM=dumb HTTPBIN_HOSTNAME=httpbin-integration HTTPBIN_PORT=8080 DATADOG_HAVE_DEV_ENV=1 DD_TRACE_GIT_METADATA_ENABLED=0 pecl run-tests --showdiff --ini=" -d datadog.trace.sources_path=" -p datadog_trace
   after_script:
     - mkdir artifacts

.gitlab/generate-profiler.php

@@ -165,8 +165,6 @@
     - "if php -r 'exit(PHP_VERSION_ID < 80400 ? 0 : 1);'; then cat profiling/tests/php-language-xfail-pre84.list >> /tmp/profiler-php-language-xfail.list; fi"
     - export XFAIL_LIST=/tmp/profiler-php-language-xfail.list
     - ulimit -c unlimited
-    # The Fabric proxy changes curl test behavior and leaks HTTP_PROXY into $_SERVER.
-    - unset HTTP_PROXY HTTPS_PROXY http_proxy https_proxy ALL_PROXY all_proxy
     - .gitlab/run_php_language_tests.sh
   after_script:
     - |

.gitlab/generate-tracer.php

@@ -571,6 +571,8 @@ function before_script_steps($with_docker_auth = false) {
     - make composer_tests_update
     - .gitlab/wait-for-service-ready.sh
   script:
+    # The Fabric proxy changes network failure semantics in integration tests.
+    - unset HTTP_PROXY HTTPS_PROXY http_proxy https_proxy ALL_PROXY all_proxy
     - DD_TRACE_AGENT_TIMEOUT=1000 make $MAKE_TARGET RUST_DEBUG_BUILD=1 PHPUNIT_JUNIT="artifacts/tests/results.xml" <?= ASSERT_NO_MEMLEAKS ?>
 <?php after_script(".", true); ?>
     - find tests -type f \( -name 'phpunit_error.log' -o -name 'nginx_*.log' -o -name 'apache_*.log' -o -name 'php_fpm_*.log' -o -name 'dd_php_error.log' \) -exec cp --parents '{}' artifacts \;

.gitlab/run_php_language_tests.sh

@@ -1,6 +1,9 @@
 #!/usr/bin/env bash
 set -eo pipefail
 
+# The Fabric proxy changes network failure semantics and leaks HTTP_PROXY into $_SERVER.
+unset HTTP_PROXY HTTPS_PROXY http_proxy https_proxy ALL_PROXY all_proxy
+
 # Helper to parse version strings for comparison
 function version { echo "$@" | awk -F. '{ printf("%d%03d%03d%03d\n", $1,$2,$3,$4); }'; }