Merge branch 'chore/update-submodule'

Co-authored-by: repo-ranger[bot] <39074581+repo-ranger[bot]@users.noreply.github.com>

.github/workflows/test.yml

@@ -334,6 +334,41 @@ jobs:
           echo "Expected: (failure) got ${{ steps.changed-files-specific.outcome }}"
           exit 1
 
+  test-submodules:
+    name: Test changed-files with submodule
+    runs-on: ${{ matrix.platform }}
+    strategy:
+      fail-fast: false
+      max-parallel: 4
+      matrix:
+        platform: [ubuntu-latest]
+
+    steps:
+      - name: Checkout to branch
+        uses: actions/checkout@v3
+        with:
+          submodules: recursive
+
+      - name: Run changed-files with submodule
+        id: changed-files
+        uses: ./
+        with:
+          base_sha: "85bd869"
+          sha: "adde7bb"
+          fetch_depth: 60000
+
+      - name: Verify added files
+        if: steps.changed-files.outputs.added_files != 'test/demo/test/test.txt'
+        run: |
+          echo "Expected: (test/demo/test/test.txt) got ${{ steps.changed-files.outputs.added_files }}"
+          exit 1
+
+      - name: Show output
+        run: |
+          echo "${{ toJSON(steps.changed-files.outputs) }}"
+        shell:
+          bash
+
   test:
     name: Test changed-files
     runs-on: ${{ matrix.platform }}

HISTORY.md

@@ -2,19 +2,45 @@
 
 ## [Unreleased](https://github.com/tj-actions/changed-files/tree/HEAD)
 
-[Full Changelog](https://github.com/tj-actions/changed-files/compare/v35.5.1...HEAD)
+[Full Changelog](https://github.com/tj-actions/changed-files/compare/v35.5.3...HEAD)
+
+**Fixed bugs:**
+
+- \[BUG\] action fail with pull request from external branch called master [\#979](https://github.com/tj-actions/changed-files/issues/979)
+
+## [v35.5.3](https://github.com/tj-actions/changed-files/tree/v35.5.3) (2023-02-14)
+
+[Full Changelog](https://github.com/tj-actions/changed-files/compare/v35...v35.5.3)
+
+## [v35](https://github.com/tj-actions/changed-files/tree/v35) (2023-02-14)
+
+[Full Changelog](https://github.com/tj-actions/changed-files/compare/v35.5.2...v35)
+
+**Fixed bugs:**
+
+- Action fails on empty repo or when the specific file pattern is not found [\#976](https://github.com/tj-actions/changed-files/issues/976)
+
+**Merged pull requests:**
+
+- fix: bug with pr from forks with similar branch names [\#981](https://github.com/tj-actions/changed-files/pull/981) ([jackton1](https://github.com/jackton1))
+- Upgraded to v35.5.2 [\#977](https://github.com/tj-actions/changed-files/pull/977) ([jackton1](https://github.com/jackton1))
+
+## [v35.5.2](https://github.com/tj-actions/changed-files/tree/v35.5.2) (2023-02-09)
+
+[Full Changelog](https://github.com/tj-actions/changed-files/compare/v35.5.1...v35.5.2)
 
 **Fixed bugs:**
 
 - \[BUG\] Unsynced target branch changes listed by action in pull requests [\#972](https://github.com/tj-actions/changed-files/issues/972)
 
+**Merged pull requests:**
+
+- chore: update use of tilde to use caret instead [\#975](https://github.com/tj-actions/changed-files/pull/975) ([jackton1](https://github.com/jackton1))
+- Upgraded to v35.5.1 [\#974](https://github.com/tj-actions/changed-files/pull/974) ([jackton1](https://github.com/jackton1))
+
 ## [v35.5.1](https://github.com/tj-actions/changed-files/tree/v35.5.1) (2023-02-07)
 
-[Full Changelog](https://github.com/tj-actions/changed-files/compare/v35...v35.5.1)
-
-## [v35](https://github.com/tj-actions/changed-files/tree/v35) (2023-02-07)
-
-[Full Changelog](https://github.com/tj-actions/changed-files/compare/v35.5.0...v35)
+[Full Changelog](https://github.com/tj-actions/changed-files/compare/v35.5.0...v35.5.1)
 
 **Fixed bugs:**
 
@@ -510,7 +536,7 @@
 
 ## [v34.3.3](https://github.com/tj-actions/changed-files/tree/v34.3.3) (2022-11-08)
 
-[Full Changelog](https://github.com/tj-actions/changed-files/compare/v34.3.2...v34.3.3)
+[Full Changelog](https://github.com/tj-actions/changed-files/compare/v34.3.1...v34.3.3)
 
 **Fixed bugs:**
 
@@ -525,13 +551,13 @@
 - chore: update readme [\#784](https://github.com/tj-actions/changed-files/pull/784) ([jackton1](https://github.com/jackton1))
 - Upgraded to v34.3.2 [\#781](https://github.com/tj-actions/changed-files/pull/781) ([jackton1](https://github.com/jackton1))
 
-## [v34.3.2](https://github.com/tj-actions/changed-files/tree/v34.3.2) (2022-11-07)
-
-[Full Changelog](https://github.com/tj-actions/changed-files/compare/v34.3.1...v34.3.2)
-
 ## [v34.3.1](https://github.com/tj-actions/changed-files/tree/v34.3.1) (2022-11-07)
 
-[Full Changelog](https://github.com/tj-actions/changed-files/compare/v34.3.0...v34.3.1)
+[Full Changelog](https://github.com/tj-actions/changed-files/compare/v34.3.2...v34.3.1)
+
+## [v34.3.2](https://github.com/tj-actions/changed-files/tree/v34.3.2) (2022-11-07)
+
+[Full Changelog](https://github.com/tj-actions/changed-files/compare/v34.3.0...v34.3.2)
 
 **Fixed bugs:**
 
@@ -707,7 +733,7 @@
 
 ## [v34.0.0](https://github.com/tj-actions/changed-files/tree/v34.0.0) (2022-10-25)
 
-[Full Changelog](https://github.com/tj-actions/changed-files/compare/v33...v34.0.0)
+[Full Changelog](https://github.com/tj-actions/changed-files/compare/v33.0.0...v34.0.0)
 
 **Fixed bugs:**
 
@@ -720,13 +746,13 @@
 - feat: add support for fetching more history [\#709](https://github.com/tj-actions/changed-files/pull/709) ([jackton1](https://github.com/jackton1))
 - Upgraded to v33.0.0 [\#707](https://github.com/tj-actions/changed-files/pull/707) ([jackton1](https://github.com/jackton1))
 
-## [v33](https://github.com/tj-actions/changed-files/tree/v33) (2022-10-21)
-
-[Full Changelog](https://github.com/tj-actions/changed-files/compare/v33.0.0...v33)
-
 ## [v33.0.0](https://github.com/tj-actions/changed-files/tree/v33.0.0) (2022-10-21)
 
-[Full Changelog](https://github.com/tj-actions/changed-files/compare/v32...v33.0.0)
+[Full Changelog](https://github.com/tj-actions/changed-files/compare/v33...v33.0.0)
+
+## [v33](https://github.com/tj-actions/changed-files/tree/v33) (2022-10-21)
+
+[Full Changelog](https://github.com/tj-actions/changed-files/compare/v32.1.2...v33)
 
 **Closed issues:**
 
@@ -745,13 +771,13 @@
 - chore\(deps\): update tj-actions/verify-changed-files action to v12 [\#696](https://github.com/tj-actions/changed-files/pull/696) ([renovate[bot]](https://github.com/apps/renovate))
 - Upgraded to v32.1.2 [\#695](https://github.com/tj-actions/changed-files/pull/695) ([jackton1](https://github.com/jackton1))
 
-## [v32](https://github.com/tj-actions/changed-files/tree/v32) (2022-10-16)
-
-[Full Changelog](https://github.com/tj-actions/changed-files/compare/v32.1.2...v32)
-
 ## [v32.1.2](https://github.com/tj-actions/changed-files/tree/v32.1.2) (2022-10-16)
 
-[Full Changelog](https://github.com/tj-actions/changed-files/compare/v32.1.1...v32.1.2)
+[Full Changelog](https://github.com/tj-actions/changed-files/compare/v32...v32.1.2)
+
+## [v32](https://github.com/tj-actions/changed-files/tree/v32) (2022-10-16)
+
+[Full Changelog](https://github.com/tj-actions/changed-files/compare/v32.1.1...v32)
 
 **Fixed bugs:**
 
@@ -807,7 +833,7 @@
 
 ## [v32.0.0](https://github.com/tj-actions/changed-files/tree/v32.0.0) (2022-10-06)
 
-[Full Changelog](https://github.com/tj-actions/changed-files/compare/v31...v32.0.0)
+[Full Changelog](https://github.com/tj-actions/changed-files/compare/v31.0.3...v32.0.0)
 
 **Merged pull requests:**
 
@@ -818,13 +844,13 @@
 - chore\(deps\): update actions/checkout action to v3.1.0 [\#669](https://github.com/tj-actions/changed-files/pull/669) ([renovate[bot]](https://github.com/apps/renovate))
 - Upgraded to v31.0.3 [\#667](https://github.com/tj-actions/changed-files/pull/667) ([jackton1](https://github.com/jackton1))
 
-## [v31](https://github.com/tj-actions/changed-files/tree/v31) (2022-10-02)
-
-[Full Changelog](https://github.com/tj-actions/changed-files/compare/v31.0.3...v31)
-
 ## [v31.0.3](https://github.com/tj-actions/changed-files/tree/v31.0.3) (2022-10-02)
 
-[Full Changelog](https://github.com/tj-actions/changed-files/compare/v31.0.2...v31.0.3)
+[Full Changelog](https://github.com/tj-actions/changed-files/compare/v31...v31.0.3)
+
+## [v31](https://github.com/tj-actions/changed-files/tree/v31) (2022-10-02)
+
+[Full Changelog](https://github.com/tj-actions/changed-files/compare/v31.0.2...v31)
 
 **Fixed bugs:**
 
@@ -864,7 +890,7 @@
 
 ## [v31.0.0](https://github.com/tj-actions/changed-files/tree/v31.0.0) (2022-09-25)
 
-[Full Changelog](https://github.com/tj-actions/changed-files/compare/v30.0.0...v31.0.0)
+[Full Changelog](https://github.com/tj-actions/changed-files/compare/v30...v31.0.0)
 
 **Merged pull requests:**
 
@@ -877,13 +903,13 @@
 - chore: update broken link [\#642](https://github.com/tj-actions/changed-files/pull/642) ([jackton1](https://github.com/jackton1))
 - Upgraded to v30.0.0 [\#641](https://github.com/tj-actions/changed-files/pull/641) ([jackton1](https://github.com/jackton1))
 
-## [v30.0.0](https://github.com/tj-actions/changed-files/tree/v30.0.0) (2022-09-24)
-
-[Full Changelog](https://github.com/tj-actions/changed-files/compare/v30...v30.0.0)
-
 ## [v30](https://github.com/tj-actions/changed-files/tree/v30) (2022-09-24)
 
-[Full Changelog](https://github.com/tj-actions/changed-files/compare/v29.0.9...v30)
+[Full Changelog](https://github.com/tj-actions/changed-files/compare/v30.0.0...v30)
+
+## [v30.0.0](https://github.com/tj-actions/changed-files/tree/v30.0.0) (2022-09-24)
+
+[Full Changelog](https://github.com/tj-actions/changed-files/compare/v29.0.9...v30.0.0)
 
 **Fixed bugs:**
 
@@ -1830,7 +1856,7 @@
 
 ## [v12](https://github.com/tj-actions/changed-files/tree/v12) (2021-12-14)
 
-[Full Changelog](https://github.com/tj-actions/changed-files/compare/v11...v12)
+[Full Changelog](https://github.com/tj-actions/changed-files/compare/v11.9...v12)
 
 **Implemented enhancements:**
 
@@ -1848,13 +1874,13 @@
 - \[PR 1\]: Renamed all\_modified\_files to all\_changed\_files [\#283](https://github.com/tj-actions/changed-files/pull/283) ([jackton1](https://github.com/jackton1))
 - Upgraded to v11.9 [\#280](https://github.com/tj-actions/changed-files/pull/280) ([jackton1](https://github.com/jackton1))
 
-## [v11](https://github.com/tj-actions/changed-files/tree/v11) (2021-12-04)
-
-[Full Changelog](https://github.com/tj-actions/changed-files/compare/v11.9...v11)
-
 ## [v11.9](https://github.com/tj-actions/changed-files/tree/v11.9) (2021-12-04)
 
-[Full Changelog](https://github.com/tj-actions/changed-files/compare/v1.3.1...v11.9)
+[Full Changelog](https://github.com/tj-actions/changed-files/compare/v11...v11.9)
+
+## [v11](https://github.com/tj-actions/changed-files/tree/v11) (2021-12-04)
+
+[Full Changelog](https://github.com/tj-actions/changed-files/compare/v1.3.1...v11)
 
 **Implemented enhancements:**
 
@@ -2348,7 +2374,7 @@
 
 ## [v7](https://github.com/tj-actions/changed-files/tree/v7) (2021-06-09)
 
-[Full Changelog](https://github.com/tj-actions/changed-files/compare/v6.3...v7)
+[Full Changelog](https://github.com/tj-actions/changed-files/compare/v6...v7)
 
 **Closed issues:**
 
@@ -2364,13 +2390,13 @@
 - Update tj-actions/sync-release-version action to v8.7 [\#86](https://github.com/tj-actions/changed-files/pull/86) ([renovate[bot]](https://github.com/apps/renovate))
 - Upgraded to v6.3 [\#85](https://github.com/tj-actions/changed-files/pull/85) ([jackton1](https://github.com/jackton1))
 
-## [v6.3](https://github.com/tj-actions/changed-files/tree/v6.3) (2021-05-26)
-
-[Full Changelog](https://github.com/tj-actions/changed-files/compare/v6...v6.3)
-
 ## [v6](https://github.com/tj-actions/changed-files/tree/v6) (2021-05-26)
 
-[Full Changelog](https://github.com/tj-actions/changed-files/compare/v6.2...v6)
+[Full Changelog](https://github.com/tj-actions/changed-files/compare/v6.3...v6)
+
+## [v6.3](https://github.com/tj-actions/changed-files/tree/v6.3) (2021-05-26)
+
+[Full Changelog](https://github.com/tj-actions/changed-files/compare/v6.2...v6.3)
 
 **Merged pull requests:**
 

README.md

@@ -1,11 +1,11 @@
+[![Ubuntu](https://img.shields.io/badge/Ubuntu-E95420?style=for-the-badge\&logo=ubuntu\&logoColor=white)](https://docs.github.com/en/actions/reference/workflow-syntax-for-github-actions#jobsjob_idruns-on)
+[![Mac OS](https://img.shields.io/badge/mac%20os-000000?style=for-the-badge\&logo=macos\&logoColor=F0F0F0)](https://docs.github.com/en/actions/reference/workflow-syntax-for-github-actions#jobsjob_idruns-on)
+[![Windows](https://img.shields.io/badge/Windows-0078D6?style=for-the-badge\&logo=windows\&logoColor=white)](https://docs.github.com/en/actions/reference/workflow-syntax-for-github-actions#jobsjob_idruns-on)
+[![Public workflows that use this action.](https://img.shields.io/endpoint?style=for-the-badge\&url=https%3A%2F%2Fused-by.vercel.app%2Fapi%2Fgithub-actions%2Fused-by%3Faction%3Dtj-actions%2Fchanged-files%26badge%3Dtrue)](https://github.com/search?o=desc\&q=tj-actions+changed-files+language%3AYAML\&s=\&type=Code)
+
 [![Codacy Badge](https://app.codacy.com/project/badge/Grade/4a625e9b62794b5b98e169c15c0e673c)](https://www.codacy.com/gh/tj-actions/changed-files/dashboard?utm_source=github.com\&utm_medium=referral\&utm_content=tj-actions/changed-files\&utm_campaign=Badge_Grade)
 [![CI](https://github.com/tj-actions/changed-files/actions/workflows/test.yml/badge.svg)](https://github.com/tj-actions/changed-files/actions/workflows/test.yml)
 [![Update release version.](https://github.com/tj-actions/changed-files/actions/workflows/sync-release-version.yml/badge.svg)](https://github.com/tj-actions/changed-files/actions/workflows/sync-release-version.yml)
-[![Public workflows that use this action.](https://img.shields.io/endpoint?url=https%3A%2F%2Fused-by.vercel.app%2Fapi%2Fgithub-actions%2Fused-by%3Faction%3Dtj-actions%2Fchanged-files%26badge%3Dtrue)](https://github.com/search?o=desc\&q=tj-actions+changed-files+language%3AYAML\&s=\&type=Code)
-
-[![Ubuntu](https://img.shields.io/badge/Ubuntu-E95420?logo=ubuntu\&logoColor=white)](https://docs.github.com/en/actions/reference/workflow-syntax-for-github-actions#jobsjob_idruns-on)
-[![Mac OS](https://img.shields.io/badge/mac%20os-000000?logo=macos\&logoColor=F0F0F0)](https://docs.github.com/en/actions/reference/workflow-syntax-for-github-actions#jobsjob_idruns-on)
-[![Windows](https://img.shields.io/badge/Windows-0078D6?logo=windows\&logoColor=white)](https://docs.github.com/en/actions/reference/workflow-syntax-for-github-actions#jobsjob_idruns-on)
 
 <!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
 
@@ -23,8 +23,8 @@ Retrieve all changed files and directories relative to the target branch or the
 *   Easy to debug.
 *   Scales to large repositories.
 *   Supports Git submodules.
-*   Escaped JSON Output which can be used for running matrix jobs based on changed files.
-*   Optionally list only changed directories.
+*   Escaped JSON output which can be used for running matrix jobs based on changed files.
+*   List changed directories.
 *   Restrict the max depth of changed directories.
 *   Write outputs to files at a specified location for further processing.
 *   Monorepos (Fetches only the last remote commit).

diff-sha.sh

@@ -4,7 +4,7 @@ set -euo pipefail
 
 INITIAL_COMMIT="false"
 GITHUB_OUTPUT=${GITHUB_OUTPUT:-""}
-EXTRA_ARGS="--no-tags --prune --no-recurse-submodules"
+EXTRA_ARGS="--no-tags --prune --recurse-submodules"
 PREVIOUS_SHA=""
 CURRENT_SHA=""
 DIFF="..."
@@ -60,7 +60,9 @@ if [[ -z $GITHUB_EVENT_PULL_REQUEST_BASE_REF ]]; then
   if [[ -f .git/shallow ]]; then
     echo "Fetching remote refs..."
     # shellcheck disable=SC2086
-    git fetch $EXTRA_ARGS -u --progress --deepen="$INPUT_FETCH_DEPTH" origin "$CURRENT_BRANCH" 1>/dev/null || true
+    git fetch $EXTRA_ARGS -u --progress --deepen="$INPUT_FETCH_DEPTH" origin +refs/heads/"$CURRENT_BRANCH":refs/remotes/origin/"$CURRENT_BRANCH" 1>/dev/null
+    # shellcheck disable=SC2086
+    git submodule foreach git fetch $EXTRA_ARGS -u --progress --deepen="$INPUT_FETCH_DEPTH" || true
   fi
 
   echo "::debug::Getting HEAD SHA..."
@@ -168,7 +170,8 @@ else
     if [[ "$INPUT_SINCE_LAST_REMOTE_COMMIT" != "true" ]]; then
       echo "::debug::Fetching remote target branch..."
       # shellcheck disable=SC2086
-      git fetch $EXTRA_ARGS -u --progress --deepen="$INPUT_FETCH_DEPTH" origin "$TARGET_BRANCH:$TARGET_BRANCH" 1>/dev/null
+      git fetch $EXTRA_ARGS -u --progress --deepen="$INPUT_FETCH_DEPTH" origin +refs/heads/"$TARGET_BRANCH":refs/remotes/origin/"$TARGET_BRANCH" 1>/dev/null
+      git branch --track "$TARGET_BRANCH" origin/"$TARGET_BRANCH" 1>/dev/null || true
     fi
   fi
 
@@ -212,13 +215,13 @@ else
 
       if [[ -f .git/shallow ]]; then
         # check if the merge base is in the local history
-        if ! git merge-base "$PREVIOUS_SHA" "$CURRENT_SHA"; then
+        if ! git merge-base "$PREVIOUS_SHA" "$CURRENT_SHA" 1>/dev/null 2>&1; then
           echo "::debug::Merge base is not in the local history, fetching remote target branch..."
           # Fetch more of the target branch history until the merge base is found
           for i in {1..10}; do
             # shellcheck disable=SC2086
-            git fetch $EXTRA_ARGS -u --progress --deepen="$INPUT_FETCH_DEPTH" origin "$TARGET_BRANCH:$TARGET_BRANCH" 1>/dev/null
-            if git merge-base "$PREVIOUS_SHA" "$CURRENT_SHA"; then
+            git fetch $EXTRA_ARGS -u --progress --deepen="$INPUT_FETCH_DEPTH" origin +refs/heads/"$TARGET_BRANCH":refs/remotes/origin/"$TARGET_BRANCH" 1>/dev/null
+            if git merge-base "$PREVIOUS_SHA" "$CURRENT_SHA" 1>/dev/null 2>&1; then
               break
             fi
             echo "::debug::Merge base is not in the local history, fetching remote target branch again..."

get-changed-paths.sh

@@ -56,13 +56,13 @@ function get_dirname_max_depth() {
 }
 
 function json_output() {
-  JQ_ARGS="-sR"
+  local jq_args="-sR"
   if [[ "$INPUT_JSON_RAW_FORMAT" == "true" ]]; then
-    JQ_ARGS="$JQ_ARGS -r"
+    jq_args="$jq_args -r"
   fi
 
   # shellcheck disable=SC2086
-  jq $JQ_ARGS 'split("\n") | map(select(. != "")) | @json' | sed -r 's/^"|"$//g' | tr -s /
+  jq $jq_args 'split("\n") | map(select(. != "")) | @json' | sed -r 's/^"|"$//g' | tr -s /
 }
 
 function get_diff() {
@@ -71,33 +71,33 @@ function get_diff() {
   local filter="$3"
 
   while IFS='' read -r sub; do
-    sub_commit_pre="$(git diff "$base$DIFF$sha" -- "$sub" | { grep '^[-]Subproject commit' || true; } | awk '{print $3}')" && exit_status=$? || exit_status=$?
+    sub_commit_pre="$(git diff "$base" "$sha" -- "$sub" | { grep '^[-]Subproject commit' || true; } | awk '{print $3}')" && exit_status=$? || exit_status=$?
     if [[ $exit_status -ne 0 ]]; then
-      echo "::error::Failed to get previous commit for submodule ($sub) between: $base$DIFF$sha"
-      exit 1
+      echo "::warning::Failed to get previous commit for submodule ($sub) between: $base $sha. Please ensure that submodules are initialized and up to date. See: https://github.com/actions/checkout#usage" >&2
     fi
 
-    sub_commit_cur="$(git diff "$base$DIFF$sha" -- "$sub" | { grep '^[+]Subproject commit' || true; } | awk '{print $3}')" && exit_status=$? || exit_status=$?
+    sub_commit_cur="$(git diff "$base" "$sha" -- "$sub" | { grep '^[+]Subproject commit' || true; } | awk '{print $3}')" && exit_status=$? || exit_status=$?
     if [[ $exit_status -ne 0 ]]; then
-      echo "::error::Failed to get current commit for submodule ($sub) between: $base$DIFF$sha"
-      exit 1
+      echo "::warning::Failed to get current commit for submodule ($sub) between: $base $sha. Please ensure that submodules are initialized and up to date. See: https://github.com/actions/checkout#usage" >&2
     fi
 
     if [ -n "$sub_commit_cur" ]; then
       (
         cd "$sub" && (
           # the strange magic number is a hardcoded "empty tree" commit sha
-          get_diff "${sub_commit_pre:-4b825dc642cb6eb9a060e54bf8d69288fbee4904}" "${sub_commit_cur}" "$filter" | awk -v r="$sub" '{ print "" r "/" $0}'
+          git diff --diff-filter="$filter" --name-only --ignore-submodules=all "${sub_commit_pre:-4b825dc642cb6eb9a060e54bf8d69288fbee4904}" "${sub_commit_cur}" | awk -v r="$sub" '{ print "" r "/" $0}' 2>/dev/null
         )
-      )
+      ) || {
+        echo "::warning::Failed to get changed files for submodule ($sub) between: ${sub_commit_pre:-4b825dc642cb6eb9a060e54bf8d69288fbee4904} ${sub_commit_cur}. Please ensure that submodules are initialized and up to date. See: https://github.com/actions/checkout#usage" >&2
+      }
     fi
   done < <(git submodule | awk '{print $2}')
 
-  git diff --diff-filter="$filter" --name-only --ignore-submodules=all --no-merges "$base$DIFF$sha" && exit_status=$? || exit_status=$?
+  git diff --diff-filter="$filter" --name-only --ignore-submodules=all "$base$DIFF$sha" && exit_status=$? || exit_status=$?
 
   if [[ $exit_status -ne 0 ]]; then
-    echo "::error::Failed to get changed files between: $base$DIFF$sha"
-    exit 1
+    echo "::error::Failed to get changed files between: $base$DIFF$sha" >&2
+    return 1
   fi
 }
 
@@ -106,33 +106,33 @@ function get_renames() {
   local sha="$2"
 
   while IFS='' read -r sub; do
-    sub_commit_pre="$(git diff "$base$DIFF$sha" -- "$sub" | { grep '^[-]Subproject commit' || true; } | awk '{print $3}')" && exit_status=$? || exit_status=$?
+    sub_commit_pre="$(git diff "$base" "$sha" -- "$sub" | { grep '^[-]Subproject commit' || true; } | awk '{print $3}')" && exit_status=$? || exit_status=$?
     if [[ $exit_status -ne 0 ]]; then
-      echo "::error::Failed to get previous commit for submodule ($sub) between: $base$DIFF$sha"
-      exit 1
+      echo "::warning::Failed to get previous commit for submodule ($sub) between: $base $sha. Please ensure that submodules are initialized and up to date. See: https://github.com/actions/checkout#usage" >&2
     fi
 
-    sub_commit_cur="$(git diff "$base$DIFF$sha" -- "$sub" | { grep '^[+]Subproject commit' || true; } | awk '{print $3}')" && exit_status=$? || exit_status=$?
+    sub_commit_cur="$(git diff "$base" "$sha" -- "$sub" | { grep '^[+]Subproject commit' || true; } | awk '{print $3}')" && exit_status=$? || exit_status=$?
     if [[ $exit_status -ne 0 ]]; then
-      echo "::error::Failed to get current commit for submodule ($sub) between: $base$DIFF$sha"
-      exit 1
+      echo "::warning::Failed to get current commit for submodule ($sub) between: $base $sha. Please ensure that submodules are initialized and up to date. See: https://github.com/actions/checkout#usage" >&2
     fi
 
     if [ -n "$sub_commit_cur" ]; then
       (
         cd "$sub" && (
           # the strange magic number is a hardcoded "empty tree" commit sha
-          get_renames "${sub_commit_pre:-4b825dc642cb6eb9a060e54bf8d69288fbee4904}" "${sub_commit_cur}" | awk -v r="$sub" '{ print "" r "/" $0}'
+          git log --name-status --ignore-submodules=all "${sub_commit_pre:-4b825dc642cb6eb9a060e54bf8d69288fbee4904}" "${sub_commit_cur}" | { grep -E "^R" || true; } | awk -F '\t' -v d="$INPUT_OLD_NEW_SEPARATOR" '{print $2d$3}' | awk -v r="$sub" '{ print "" r "/" $0}'
         )
-      )
+      ) || {
+        echo "::warning::Failed to get renamed files for submodule ($sub) between: ${sub_commit_pre:-4b825dc642cb6eb9a060e54bf8d69288fbee4904} ${sub_commit_cur}. Please ensure that submodules are initialized and up to date. See: https://github.com/actions/checkout#usage" >&2
+      }
     fi
   done < <(git submodule | awk '{print $2}')
 
   git log --name-status --ignore-submodules=all "$base" "$sha" | { grep -E "^R" || true; } | awk -F '\t' -v d="$INPUT_OLD_NEW_SEPARATOR" '{print $2d$3}' && exit_status=$? || exit_status=$?
 
   if [[ $exit_status -ne 0 ]]; then
-    echo "::error::Failed to get renamed files between: $base → $sha"
-    exit 1
+    echo "::error::Failed to get renamed files between: $base → $sha" >&2
+    return 1
   fi
 }