Merge pull request #617 from tj-actions/fix/bug-with-similar-commits-when-github-event-before-is-empty

Closes: #615

.github/workflows/manual-test.yml

@@ -11,7 +11,7 @@ jobs:
       fail-fast: false
       max-parallel: 4
       matrix:
-        platform: [ubuntu-latest, windows-latest, macos-latest, macos-11, ubuntu-18.04, windows-2022]
+        platform: [ubuntu-latest, ubuntu-22.04, windows-latest, macos-latest, macos-11, ubuntu-18.04, windows-2022]
 
     steps:
       - name: Checkout

.github/workflows/test.yml

@@ -30,7 +30,7 @@ jobs:
       fail-fast: false
       max-parallel: 4
       matrix:
-        platform: [ubuntu-latest, windows-latest, macos-latest, macos-11, ubuntu-18.04, windows-2022]
+        platform: [ubuntu-latest, ubuntu-22.04, windows-latest, macos-latest, macos-11, ubuntu-18.04, windows-2022]
 
     steps:
       - name: Checkout
@@ -70,7 +70,7 @@ jobs:
       fail-fast: false
       max-parallel: 4
       matrix:
-        platform: [ubuntu-latest, windows-latest, macos-latest, macos-11, ubuntu-18.04, windows-2022]
+        platform: [ubuntu-latest, ubuntu-22.04, windows-latest, macos-latest, macos-11, ubuntu-18.04, windows-2022]
     steps:
       - name: Checkout into dir1
         uses: actions/checkout@v3
@@ -126,11 +126,48 @@ jobs:
       fail-fast: false
       max-parallel: 4
       matrix:
-        platform: [ubuntu-latest, windows-latest, macos-latest, macos-11, ubuntu-18.04, windows-2022]
+        platform: [ubuntu-latest, ubuntu-22.04, windows-latest, macos-latest, macos-11, ubuntu-18.04, windows-2022]
 
     steps:
       - name: Checkout to branch
         uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - name: Run changed-files with similar base and commit sha
+        id: changed-files
+        continue-on-error: true
+        uses: ./
+        with:
+          base_sha: d1c0ee4
+          sha: d1c0ee4
+
+      - name: Exit with 1 if no error is raised
+        if: steps.changed-files.outcome != 'failure'
+        run: |
+          echo "Expected: (failure) got ${{ steps.changed-files.outcome }}"
+          exit 1
+
+      - name: Show output
+        run: |
+          echo '${{ toJSON(steps.changed-files.outputs) }}'
+        shell:
+          bash
+
+  test-single-commit-history:
+    name: Test changed-files single commit history
+    runs-on: ${{ matrix.platform }}
+    strategy:
+      fail-fast: false
+      max-parallel: 4
+      matrix:
+        platform: [ubuntu-latest, ubuntu-22.04, windows-latest, macos-latest, macos-11, ubuntu-18.04, windows-2022]
+
+    steps:
+      - name: Checkout to branch
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 1
 
       - name: Run changed-files with a single commit history
         id: changed-files
@@ -149,7 +186,7 @@ jobs:
       fail-fast: false
       max-parallel: 4
       matrix:
-        platform: [ubuntu-latest, windows-latest, macos-latest, macos-11, ubuntu-18.04, windows-2022]
+        platform: [ubuntu-latest, ubuntu-22.04, windows-latest, macos-latest, macos-11, ubuntu-18.04, windows-2022]
 
     steps:
       - name: Checkout to branch
@@ -201,7 +238,7 @@ jobs:
       fail-fast: false
       max-parallel: 4
       matrix:
-        platform: [ubuntu-latest, windows-latest, macos-latest, macos-11, ubuntu-18.04, windows-2022]
+        platform: [ubuntu-latest, ubuntu-22.04, windows-latest, macos-latest, macos-11, ubuntu-18.04, windows-2022]
 
     steps:
       - name: Checkout to branch
@@ -253,7 +290,7 @@ jobs:
       fail-fast: false
       max-parallel: 4
       matrix:
-        platform: [ubuntu-latest, windows-latest, macos-latest, macos-11, ubuntu-18.04, windows-2022]
+        platform: [ubuntu-latest, ubuntu-22.04, windows-latest, macos-latest, macos-11, ubuntu-18.04, windows-2022]
 
     steps:
       - name: Checkout
@@ -379,6 +416,15 @@ jobs:
         uses: ./
         with:
           separator: ","
+      - name: List all modified files
+        run: |
+          IFS=$',' read -a MODIFIED_FILES_ARRAY <<< "${{ steps.changed-files-comma.outputs.modified_files }}"
+          for file in "${MODIFIED_FILES_ARRAY[@]}"; do
+            echo $file
+          done
+          unset IFS
+        shell:
+          bash
       - name: Show output
         run: |
           echo '${{ toJSON(steps.changed-files-comma.outputs) }}'

HISTORY.md

@@ -1,13 +1,36 @@
 # Changelog
 
-## [Unreleased](https://github.com/tj-actions/changed-files/tree/HEAD)
+## [v29.0.3](https://github.com/tj-actions/changed-files/tree/v29.0.3) (2022-09-03)
 
-[Full Changelog](https://github.com/tj-actions/changed-files/compare/v29.0.1...HEAD)
+[Full Changelog](https://github.com/tj-actions/changed-files/compare/v29.0.2...v29.0.3)
+
+**Merged pull requests:**
+
+- fix: bug using invalid fetch-depth [\#606](https://github.com/tj-actions/changed-files/pull/606) ([jackton1](https://github.com/jackton1))
+- Upgraded to v29.0.2 [\#604](https://github.com/tj-actions/changed-files/pull/604) ([jackton1](https://github.com/jackton1))
+
+## [v29.0.2](https://github.com/tj-actions/changed-files/tree/v29.0.2) (2022-08-29)
+
+[Full Changelog](https://github.com/tj-actions/changed-files/compare/v29.0.1...v29.0.2)
+
+**Implemented enhancements:**
+
+- \[Feature\] Get all changes on current branch against a base\_sha [\#599](https://github.com/tj-actions/changed-files/issues/599)
 
 **Fixed bugs:**
 
 - \[BUG\] dir\_names = true not returning directories with changed files [\#598](https://github.com/tj-actions/changed-files/issues/598)
 
+**Closed issues:**
+
+- Dependency Dashboard [\#27](https://github.com/tj-actions/changed-files/issues/27)
+
+**Merged pull requests:**
+
+- chore: remove unused input [\#603](https://github.com/tj-actions/changed-files/pull/603) ([jackton1](https://github.com/jackton1))
+- chore\(deps\): update tj-actions/branch-names action to v6 [\#602](https://github.com/tj-actions/changed-files/pull/602) ([renovate[bot]](https://github.com/apps/renovate))
+- Upgraded to v29.0.1 [\#601](https://github.com/tj-actions/changed-files/pull/601) ([jackton1](https://github.com/jackton1))
+
 ## [v29.0.1](https://github.com/tj-actions/changed-files/tree/v29.0.1) (2022-08-26)
 
 [Full Changelog](https://github.com/tj-actions/changed-files/compare/v29.0.0...v29.0.1)
@@ -21,10 +44,6 @@
 
 [Full Changelog](https://github.com/tj-actions/changed-files/compare/v28.0.0...v29.0.0)
 
-**Closed issues:**
-
-- Dependency Dashboard [\#27](https://github.com/tj-actions/changed-files/issues/27)
-
 **Merged pull requests:**
 
 - chore\(deps\): update tj-actions/glob to v12 [\#596](https://github.com/tj-actions/changed-files/pull/596) ([jackton1](https://github.com/jackton1))
@@ -760,7 +779,7 @@
 
 ## [v13](https://github.com/tj-actions/changed-files/tree/v13) (2022-02-17)
 
-[Full Changelog](https://github.com/tj-actions/changed-files/compare/v12.2...v13)
+[Full Changelog](https://github.com/tj-actions/changed-files/compare/v2.0.1...v13)
 
 **Implemented enhancements:**
 
@@ -779,13 +798,13 @@
 - \[BUG\] wrong result of any\_change output [\#314](https://github.com/tj-actions/changed-files/issues/314)
 - \[BUG\] Investigate possible bug using since\_last\_remote\_commit when force pushing changes. [\#303](https://github.com/tj-actions/changed-files/issues/303)
 
-## [v12.2](https://github.com/tj-actions/changed-files/tree/v12.2) (2021-12-30)
-
-[Full Changelog](https://github.com/tj-actions/changed-files/compare/v2.0.1...v12.2)
-
 ## [v2.0.1](https://github.com/tj-actions/changed-files/tree/v2.0.1) (2021-12-30)
 
-[Full Changelog](https://github.com/tj-actions/changed-files/compare/v12.1...v2.0.1)
+[Full Changelog](https://github.com/tj-actions/changed-files/compare/v12.2...v2.0.1)
+
+## [v12.2](https://github.com/tj-actions/changed-files/tree/v12.2) (2021-12-30)
+
+[Full Changelog](https://github.com/tj-actions/changed-files/compare/v12.1...v12.2)
 
 **Merged pull requests:**
 
@@ -1347,7 +1366,7 @@
 
 ## [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:**
 
@@ -1363,13 +1382,13 @@
 - 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

@@ -13,7 +13,7 @@
 
 ## changed-files
 
-Retrieve all changed files and directories relative to the target branch (`pull_request*` based events) or the last remote commit (`push` based event) returning the **absolute path** to all changed files and directories from the project root.
+Retrieve all changed files and directories relative to the target branch (`pull_request*` based events) or the last remote commit (`push` or `pull_request*` based event) returning the **absolute path** to all changed files and directories from the project root.
 
 ## Features
 
@@ -69,7 +69,7 @@ jobs:
 
       - name: Get changed files
         id: changed-files
-        uses: tj-actions/changed-files@v29.0.1
+        uses: tj-actions/changed-files@v29.0.3
 
       - name: List all changed files
         run: |
@@ -147,7 +147,7 @@ Support this project with a :star:
 |               quotepath                |       `boolean`        | `false`  |        `true`         |                                                                                                                                Output filenames completely verbatim by setting this to `false`                                                                                                                                |
 |             diff\_relative             |       `boolean`        | `false`  |                       |                                                                                                                       Exclude changes outside the current directory and show pathnames relative to it.                                                                                                                        |
 |               dir\_names               |       `boolean`        | `false`  |        `false`        |                                                                                        Output unique changed directories instead of filenames. <br> NOTE: This returns `.` for <br> changed files located in the root of the project.                                                                                         |
-|                  json                  |       `boolean`        | `false`  |        `false`        |                                                                                                                            Output changed files in JSON format which can be used for matrix jobs.                                                                                                                             |
+|                  json                  |       `boolean`        | `false`  |        `false`        |                                                                                                                            Output changed files in JSON format which can be used for [matrix jobs](https://github.com/tj-actions/changed-files/blob/main/.github/workflows/manual-matrix-test.yml).                                                                                                                             |
 |                  since                  |       `string`        | `false`  |                |                                                                                                                            Get changed files for commits whose timestamp is older than the given time.                                                                                                                             |
 |                  until                  |       `string`        | `false`  |                |                                                                                                                            Get changed files for commits whose timestamp is earlier than the given time.                                                                                                                             |
 
@@ -163,11 +163,11 @@ Support this project with a :star:
 
       - name: Get changed files using defaults
         id: changed-files
-        uses: tj-actions/changed-files@v29.0.1
+        uses: tj-actions/changed-files@v29.0.3
 
       - name: Get changed files using a comma separator
         id: changed-files-comma
-        uses: tj-actions/changed-files@v29.0.1
+        uses: tj-actions/changed-files@v29.0.3
         with:
           separator: ","
 
@@ -189,7 +189,7 @@ Support this project with a :star:
 
       - name: Get specific changed files
         id: changed-files-specific
-        uses: tj-actions/changed-files@v29.0.1
+        uses: tj-actions/changed-files@v29.0.3
         with:
           files: |
             my-file.txt
@@ -230,14 +230,14 @@ Support this project with a :star:
 
       - name: Use a source file or list of file(s) to populate to files input.
         id: changed-files-specific-source-file
-        uses: tj-actions/changed-files@v29.0.1
+        uses: tj-actions/changed-files@v29.0.3
         with:
           files_from_source_file: |
             test/changed-files-list.txt
 
       - name: Use a source file or list of file(s) to populate to files input and optionally specify more files.
         id: changed-files-specific-source-file-and-specify-files
-        uses: tj-actions/changed-files@v29.0.1
+        uses: tj-actions/changed-files@v29.0.3
         with:
           files_from_source_file: |
             test/changed-files-list.txt
@@ -246,13 +246,13 @@ Support this project with a :star:
 
       - name: Use a different commit SHA
         id: changed-files-custom-sha
-        uses: tj-actions/changed-files@v29.0.1
+        uses: tj-actions/changed-files@v29.0.3
         with:
           sha: ${{ github.event.pull_request.head.sha }}
 
       - name: Use a different base SHA
         id: changed-files-custom-base-sha
-        uses: tj-actions/changed-files@v29.0.1
+        uses: tj-actions/changed-files@v29.0.3
         with:
           base_sha: ${{ github.event.pull_request.base.sha }}
           
@@ -264,7 +264,7 @@ Support this project with a :star:
 
       - name: Run changed-files with defaults on the dir1
         id: changed-files-for-dir1
-        uses: tj-actions/changed-files@v29.0.1
+        uses: tj-actions/changed-files@v29.0.3
         with:
           path: dir1
 
@@ -276,19 +276,19 @@ Support this project with a :star:
 
       - name: Run changed-files using the last commit on the remote branch
         id: changed-files-since-last-remote-commit
-        uses: tj-actions/changed-files@v29.0.1
+        uses: tj-actions/changed-files@v29.0.3
         with:
           since_last_remote_commit: "true"
       
       - name: Run changed-files using the fork point of a pull request
         id: changed-files-fork-point
-        uses: tj-actions/changed-files@v29.0.1
+        uses: tj-actions/changed-files@v29.0.3
         with:
           use_fork_point: "true"
           
       - name: Run changed-files with quotepath disabled
         id: changed-files-quotepath
-        uses: tj-actions/changed-files@v29.0.1
+        uses: tj-actions/changed-files@v29.0.3
         with:
           quotepath: "false"
       
@@ -310,7 +310,7 @@ Support this project with a :star:
 
       - name: Run changed-files with the commit of the last successful test workflow run
         id: changed-files-base-sha-push
-        uses: tj-actions/changed-files@v29.0.1
+        uses: tj-actions/changed-files@v29.0.3
         with:
           base_sha: ${{ steps.last_successful_commit_push.outputs.commit_hash }}
 
@@ -331,32 +331,32 @@ Support this project with a :star:
       - name: Run changed-files with the commit of the last successful test workflow run on main
         if: github.event_name == 'pull_request'
         id: changed-files-base-sha-pull-request
-        uses: tj-actions/changed-files@v29.0.1
+        uses: tj-actions/changed-files@v29.0.3
         with:
           base_sha: ${{ steps.last_successful_commit_pull_request.outputs.commit_hash }}
 
       - name: Run changed-files with dir_names
         id: changed-files-dir-names
-        uses: tj-actions/changed-files@v29.0.1
+        uses: tj-actions/changed-files@v29.0.3
         with:
           dir_names: "true"
       
       # All outputs are JSON formatted arrays and can be used in other actions and matrix compatible jobs.
       - name: Run changed-files with json output
         id: changed-files-json
-        uses: tj-actions/changed-files@v29.0.1
+        uses: tj-actions/changed-files@v29.0.3
         with:
           json: "true"
 
       - name: Run changed-files since 2022-08-19
         id: changed-files-since
-        uses: tj-actions/changed-files@v29.0.1
+        uses: tj-actions/changed-files@v29.0.3
         with:
           since: "2022-08-19"
 
       - name: Run changed-files until 2022-08-20
         id: changed-files-until
-        uses: tj-actions/changed-files@v29.0.1
+        uses: tj-actions/changed-files@v29.0.3
         with:
           until: "2022-08-20"
 ```

action.yml

@@ -57,9 +57,11 @@ inputs:
   since:
     description: "Get changed files for commits whose timestamp is older than the given time"
     required: false
+    default: ""
   until:
     description: "Get changed files for commits whose timestamp is earlier than the given time"
     required: false
+    default: ""
   path:
     description: "Specify a relative path under $GITHUB_WORKSPACE to locate the repository"
     required: false
@@ -159,13 +161,12 @@ runs:
           echo "::set-output name=base_sha::$BASE_SHA"
         elif [[ -n "${{ inputs.base_sha }}" ]]; then
           echo "::set-output name=base_sha::${{ inputs.base_sha }}"
-        elif [[ "${{ inputs.since_last_remote_commit }}" == "true" && "${{ github.event.forced }}" == "true" && "${{ github.event.before }}" != "0000000000000000000000000000000000000000" ]]; then
+        elif [[ "${{ inputs.since_last_remote_commit }}" == "true" ]]; then
           LAST_REMOTE_COMMIT=$(git rev-parse $(git branch -r --sort=-committerdate | head -1))
-          if [[ "${{ inputs.sha }}" != "$LAST_REMOTE_COMMIT" ]]; then
-            echo "::set-output name=base_sha::$LAST_REMOTE_COMMIT"
+          if [[ "${{ inputs.sha }}" == "$LAST_REMOTE_COMMIT" ]]; then
+            LAST_REMOTE_COMMIT=$(git rev-parse "${{ inputs.sha }}^1")
           fi
-        elif [[ "${{ inputs.since_last_remote_commit }}" == "true" && "${{ github.event.forced }}" != "true" && "${{ github.event.before }}" != "0000000000000000000000000000000000000000" ]]; then
-          echo "::set-output name=base_sha::${{ github.event.before }}"
+          echo "::set-output name=base_sha::$LAST_REMOTE_COMMIT"
         fi
       id: base-sha
       shell: bash
@@ -221,7 +222,7 @@ runs:
         GITHUB_ACTION_PATH: ${{ github.action_path }}
         GITHUB_WORKSPACE: ${{ github.workspace }}
         # INPUT_<VARIABLE_NAME> is not available in Composite run steps
-        # https://github.community/t/input-variable-name-is-not-available-in-composite-run-steps/127611
+        # https://docs.github.com/en/actions/creating-actions/metadata-syntax-for-github-actions#example-specifying-inputs
         INPUT_FILES_PATTERN_FILE: ${{ steps.glob.outputs.paths-output-file }}
         INPUT_SEPARATOR: ${{ inputs.separator }}
         INPUT_PATH: ${{ inputs.path }}

diff-sha.sh

@@ -23,7 +23,7 @@ function __version() {
   echo "$@" | awk -F. '{ printf("%d%03d%03d%03d\n", $1,$2,$3,$4); }';
 }
 
-GIT_VERSION=$(git --version | awk '{print $3}'); exit_status=$?
+GIT_VERSION=$(git --version | awk '{print $3}') && exit_status=$? || exit_status=$?
 
 if [[ $exit_status -ne 0 ]]; then
   echo "::error::git not installed"
@@ -40,12 +40,13 @@ fi
 echo "::debug::Getting HEAD SHA..."
 
 if [[ -z $INPUT_SHA ]]; then
-  CURRENT_SHA=$(git rev-list -n 1 "HEAD" 2>&1); exit_status=$?
+  CURRENT_SHA=$(git rev-list -n 1 "HEAD" 2>&1) && exit_status=$? || exit_status=$?
 else
   CURRENT_SHA=$INPUT_SHA; exit_status=$?
 fi
 
-git rev-parse --quiet --verify "$CURRENT_SHA^{commit}" 1>/dev/null 2>&1; exit_status=$?
+echo "::debug::Verifying the current commit SHA: $CURRENT_SHA"
+git rev-parse --quiet --verify "$CURRENT_SHA^{commit}" 1>/dev/null 2>&1 && exit_status=$? || exit_status=$?
 
 if [[ $exit_status -ne 0 ]]; then
   echo "::error::Unable to locate the current sha: $CURRENT_SHA"
@@ -62,8 +63,10 @@ if [[ -z $GITHUB_BASE_REF ]]; then
   echo "::debug::GITHUB_BASE_REF unset using $TARGET_BRANCH..."
 
   if [[ -z $INPUT_BASE_SHA ]]; then
+    git fetch --no-tags -u --progress origin --depth=2 "${TARGET_BRANCH}":"${TARGET_BRANCH}" && exit_status=$? || exit_status=$?
+
     if [[ $(git rev-list --count "HEAD") -gt 1 ]]; then
-      PREVIOUS_SHA=$(git rev-parse "@~" 2>&1); exit_status=$?
+      PREVIOUS_SHA=$(git rev-parse "@~1" 2>&1) && exit_status=$? || exit_status=$?
       echo "::debug::Previous SHA: $PREVIOUS_SHA"
     else
       PREVIOUS_SHA=$CURRENT_SHA; exit_status=$?
@@ -73,12 +76,13 @@ if [[ -z $GITHUB_BASE_REF ]]; then
     fi
   else
     PREVIOUS_SHA=$INPUT_BASE_SHA; exit_status=$?
-    TARGET_BRANCH=$(git name-rev --name-only "$PREVIOUS_SHA" 2>&1); exit_status=$?
+    TARGET_BRANCH=$(git name-rev --name-only "$PREVIOUS_SHA" 2>&1) && exit_status=$? || exit_status=$?
     echo "::debug::Previous SHA: $PREVIOUS_SHA"
     echo "::debug::Target branch: $TARGET_BRANCH"
   fi
 
-  git rev-parse --quiet --verify "$PREVIOUS_SHA^{commit}" 1>/dev/null 2>&1; exit_status=$?
+  echo "::debug::Verifying the previous commit SHA: $PREVIOUS_SHA"
+  git rev-parse --quiet --verify "$PREVIOUS_SHA^{commit}" 1>/dev/null 2>&1 && exit_status=$? || exit_status=$?
 
   if [[ $exit_status -ne 0 ]]; then
     echo "::error::Unable to locate the previous sha: $PREVIOUS_SHA"
@@ -94,24 +98,24 @@ else
   if [[ -z $INPUT_BASE_SHA ]]; then
     if [[ "$INPUT_USE_FORK_POINT" == "true" ]]; then
       echo "::debug::Getting fork point..."
-      git fetch --no-tags -u --progress origin "${TARGET_BRANCH}":"${TARGET_BRANCH}"; exit_status=$?
-      PREVIOUS_SHA=$(git merge-base --fork-point "${TARGET_BRANCH}" "$(git name-rev --name-only "$CURRENT_SHA")"); exit_status=$?
+      git fetch --no-tags -u --progress origin "${TARGET_BRANCH}":"${TARGET_BRANCH}" && exit_status=$? || exit_status=$?
+      PREVIOUS_SHA=$(git merge-base --fork-point "${TARGET_BRANCH}" "$(git name-rev --name-only "$CURRENT_SHA")") && exit_status=$? || exit_status=$?
       echo "::debug::Previous SHA: $PREVIOUS_SHA"
     else
-      git fetch --no-tags -u --progress origin --depth=1 "${TARGET_BRANCH}":"${TARGET_BRANCH}"; exit_status=$?
-      PREVIOUS_SHA=$(git rev-list -n 1 "${TARGET_BRANCH}" 2>&1); exit_status=$?
+      git fetch --no-tags -u --progress origin --depth=1 "${TARGET_BRANCH}":"${TARGET_BRANCH}" && exit_status=$? || exit_status=$?
+      PREVIOUS_SHA=$(git rev-list -n 1 "${TARGET_BRANCH}" 2>&1) && exit_status=$? || exit_status=$?
       echo "::debug::Previous SHA: $PREVIOUS_SHA"
     fi
   else
-    git fetch --no-tags -u --progress origin --depth=1 "$(git rev-parse --verify "$INPUT_BASE_SHA")"; exit_status=$?
+    git fetch --no-tags -u --progress origin --depth=1 "$(git rev-parse --verify "$INPUT_BASE_SHA")" && exit_status=$? || exit_status=$?
     PREVIOUS_SHA=$INPUT_BASE_SHA
-    TARGET_BRANCH=$(git name-rev --name-only "$PREVIOUS_SHA" 2>&1); exit_status=$?
+    TARGET_BRANCH=$(git name-rev --name-only "$PREVIOUS_SHA" 2>&1) && exit_status=$? || exit_status=$?
     echo "::debug::Previous SHA: $PREVIOUS_SHA"
     echo "::debug::Target branch: $TARGET_BRANCH"
   fi
 
-  echo "::debug::Verifying commit SHA..."
-  git rev-parse --quiet --verify "$PREVIOUS_SHA^{commit}" 1>/dev/null 2>&1; exit_status=$?
+  echo "::debug::Verifying the previous commit SHA: $PREVIOUS_SHA"
+  git rev-parse --quiet --verify "$PREVIOUS_SHA^{commit}" 1>/dev/null 2>&1 && exit_status=$? || exit_status=$?
 
   if [[ $exit_status -ne 0 ]]; then
     echo "::error::Unable to locate the previous sha: $PREVIOUS_SHA"
@@ -122,6 +126,7 @@ fi
 
 if [[ -n "$PREVIOUS_SHA" && -n "$CURRENT_SHA" && "$PREVIOUS_SHA" == "$CURRENT_SHA" && "$INITIAL_COMMIT" == "false" ]]; then
   echo "::error::Similar commit hashes detected: previous sha: $PREVIOUS_SHA is equivalent to the current sha: $CURRENT_SHA"
+  echo "::error::You seem to be missing 'fetch-depth: 0' or 'fetch-depth: 2'. See https://github.com/tj-actions/changed-files#usage"
   exit 1
 fi
 

test/test rename 1.txt

@@ -1 +1 @@
-This is a test file.
+This is test file 1.

test/test rename 2.txt

@@ -1 +1 @@
-This is a test file.
+This is test file 2.