Merge branch 'ci/git-diff-output-optimization' into 'master'

ci: optimize `git diff` handling to address "Argument list too long" error

See merge request espressif/esp-idf!34960

Author: alekseiapa

.gitlab/ci/common.yml

@@ -319,26 +319,32 @@ variables:
     - *git_init
     - *git_fetch_from_mirror_url_if_exists
     - |
+      # Store the diff output in a temporary file
+      TEMP_FILE=$(mktemp)
       # merged results pipelines, by default
       if [[ -n $CI_MERGE_REQUEST_SOURCE_BRANCH_SHA ]]; then
         git fetch origin $CI_MERGE_REQUEST_DIFF_BASE_SHA --depth=1 ${GIT_FETCH_EXTRA_FLAGS}
         git fetch origin $CI_MERGE_REQUEST_SOURCE_BRANCH_SHA --depth=1 ${GIT_FETCH_EXTRA_FLAGS}
-        export GIT_DIFF_OUTPUT=$(git diff --name-only $CI_MERGE_REQUEST_DIFF_BASE_SHA $CI_MERGE_REQUEST_SOURCE_BRANCH_SHA)
+        git diff --name-only $CI_MERGE_REQUEST_DIFF_BASE_SHA $CI_MERGE_REQUEST_SOURCE_BRANCH_SHA > "$TEMP_FILE"
+        GIT_DIFF_OUTPUT=$(cat "$TEMP_FILE")
         git fetch origin $CI_COMMIT_SHA --depth=1 ${GIT_FETCH_EXTRA_FLAGS}
       # merge request pipelines, when the mr got conflicts
       elif [[ -n $CI_MERGE_REQUEST_DIFF_BASE_SHA ]]; then
         git fetch origin $CI_MERGE_REQUEST_DIFF_BASE_SHA --depth=1 ${GIT_FETCH_EXTRA_FLAGS}
         git fetch origin $CI_COMMIT_SHA --depth=1 ${GIT_FETCH_EXTRA_FLAGS}
-        export GIT_DIFF_OUTPUT=$(git diff --name-only $CI_MERGE_REQUEST_DIFF_BASE_SHA $CI_COMMIT_SHA)
+        git diff --name-only $CI_MERGE_REQUEST_DIFF_BASE_SHA $CI_COMMIT_SHA > "$TEMP_FILE"
+        GIT_DIFF_OUTPUT=$(cat "$TEMP_FILE")
       # other pipelines, like the protected branches pipelines
       elif [[ "$CI_COMMIT_BEFORE_SHA" != "0000000000000000000000000000000000000000" ]]; then
         git fetch origin $CI_COMMIT_BEFORE_SHA --depth=1 ${GIT_FETCH_EXTRA_FLAGS}
         git fetch origin $CI_COMMIT_SHA --depth=1 ${GIT_FETCH_EXTRA_FLAGS}
-        export GIT_DIFF_OUTPUT=$(git diff --name-only $CI_COMMIT_BEFORE_SHA $CI_COMMIT_SHA)
+        git diff --name-only $CI_COMMIT_BEFORE_SHA $CI_COMMIT_SHA > "$TEMP_FILE"
+        GIT_DIFF_OUTPUT=$(cat "$TEMP_FILE")
       else
         # pipeline source could be web, scheduler, etc.
         git fetch origin $CI_COMMIT_SHA --depth=2 ${GIT_FETCH_EXTRA_FLAGS}
-        export GIT_DIFF_OUTPUT=$(git diff --name-only $CI_COMMIT_SHA~1 $CI_COMMIT_SHA)
+        git diff --name-only $CI_COMMIT_SHA~1 $CI_COMMIT_SHA > "$TEMP_FILE"
+        GIT_DIFF_OUTPUT=$(cat "$TEMP_FILE")
       fi
     - *git_checkout_ci_commit_sha
     - *common-before_scripts