Merge pull request #14705 from LDong-Arm/frozen_files_fix

Fix frozen tools check never failing

Author: 0xc0170

.travis.yml

@@ -68,9 +68,8 @@ matrix:
       before_script:
         - mkdir -p SCANCODE
         - mkdir -p SCANCODE_NEW_FILES
-        # Fetch remaining information needed for branch comparison
-        - git fetch --all --unshallow --tags
-        - git fetch origin "${TRAVIS_BRANCH}"
+        # Fetch the base branch to compare against
+        - git fetch origin "${TRAVIS_BRANCH}" --depth=1
       script:
         # scancode does not support list of files, only one file or directory
         # we use SCANCODE directory for all changed files (their copies with full tree)
@@ -130,9 +129,8 @@ matrix:
           export PATH="${PWD}/bin:${PATH}";
           cd -
         - astyle --version
-        # Fetch remaining information needed for branch comparison
-        - git fetch --all --unshallow --tags
-        - git fetch origin "${TRAVIS_BRANCH}"
+        # Fetch the base branch to compare against
+        - git fetch origin "${TRAVIS_BRANCH}" --depth=1
       script:
         - >-
           git diff --name-only --diff-filter=d FETCH_HEAD..HEAD \
@@ -246,9 +244,8 @@ matrix:
         - python -m pip install --upgrade setuptools==40.4.3
         - pip install tabulate argparse
         - pip list --verbose
-        # Fetch remaining information needed for branch comparison
-        - git fetch --all --unshallow --tags
-        - git fetch origin "${TRAVIS_BRANCH}"
+        # Fetch the base branch to compare against
+        - git fetch origin "${TRAVIS_BRANCH}" --depth=1
       script:
         - >-
           git diff --name-only --diff-filter=d FETCH_HEAD..HEAD \
@@ -320,12 +317,15 @@ matrix:
       stage: "Frozen tools check"
       name: "Frozen tools check"
       env: NAME=frozen_tools_check
+      before_script:
+        # Fetch the base branch to compare against
+        - git fetch origin "${TRAVIS_BRANCH}" --depth=1
       script:
         # Reject any changes to tools that would require a re-release of the
         # tools for the online compiler.
         - >-
             frozen_files=`\
-                git diff --name-only --diff-filter=d FETCH_HEAD..HEAD \
+                git diff --name-only FETCH_HEAD..HEAD \
                     | egrep \
                       -e "^tools/build_api*" \
                       -e "^tools/config*" \