Upgraded from v11.8 -> v1.3.1 (#279)

Co-authored-by: jackton1 <jackton1@users.noreply.github.com>

.github/workflows/auto-merge.yml

@@ -2,7 +2,6 @@ name: automerge
 on:
   check_suite:
     types:
-      - rerequested
       - completed
 
 jobs:
@@ -19,9 +18,9 @@ jobs:
       - name: automerge
         uses: pascalgn/automerge-action@v0.14.3
         env:
-          GITHUB_TOKEN: ${{ secrets.PAT_TOKEN || github.token }}
+          GITHUB_TOKEN: ${{ secrets.PAT_TOKEN }}
           MERGE_METHOD: "rebase"
           UPDATE_METHOD: "rebase"
           MERGE_RETRIES: "6"
           MERGE_RETRY_SLEEP: "100000"
-          MERGE_LABELS: ""
+          MERGE_LABELS: ""

.github/workflows/test.yml

@@ -18,7 +18,7 @@ jobs:
       - name: Checkout to branch
         uses: actions/checkout@v2
       - name: shellcheck
-        uses: reviewdog/action-shellcheck@v1.10
+        uses: reviewdog/action-shellcheck@v1.12
 
   test-multiple-repositories:
     name: Test with multiple repositories
@@ -73,8 +73,8 @@ jobs:
         shell:
           bash
 
-  test-no-head-sha:
-    name: Test changed-files missing head sha
+  test-non-existent-base-sha:
+    name: Test changed-files non existent base sha
     runs-on: ${{ matrix.platform }}
     strategy:
       fail-fast: false
@@ -85,16 +85,71 @@ jobs:
       - name: Checkout to branch
         uses: actions/checkout@v2
 
-      - name: Run changed-files with defaults
+      - name: Run changed-files with non existent base sha
         id: changed-files
-        continue-on-error: true
         uses: ./
+        continue-on-error: true
+        with:
+          base_sha: "4554456"
 
       - name: Show output
         run: |
           echo "${{ toJSON(steps.changed-files.outputs) }}"
         shell:
           bash
+          
+      - name: Run changed-files-specific with non existent base sha
+        id: changed-files-specific
+        uses: ./
+        continue-on-error: true
+        with:
+          files: action.yml
+          base_sha: "4554456"
+
+      - name: Show output
+        run: |
+          echo "${{ toJSON(steps.changed-files-specific.outputs) }}"
+        shell:
+          bash
+
+  test-non-existent-sha:
+    name: Test changed-files non existent sha
+    runs-on: ${{ matrix.platform }}
+    strategy:
+      fail-fast: false
+      matrix:
+        platform: [ubuntu-latest, windows-latest, macos-latest, macos-11, ubuntu-18.04, windows-2022, windows-2016]
+
+    steps:
+      - name: Checkout to branch
+        uses: actions/checkout@v2
+
+      - name: Run changed-files with non existent sha
+        id: changed-files
+        uses: ./
+        continue-on-error: true
+        with:
+          base_sha: "4554456"
+
+      - name: Show output
+        run: |
+          echo "${{ toJSON(steps.changed-files.outputs) }}"
+        shell:
+          bash
+          
+      - name: Run changed-files-specific with non existent sha
+        id: changed-files-specific
+        uses: ./
+        continue-on-error: true
+        with:
+          files: action.yml
+          base_sha: "4554456"
+
+      - name: Show output
+        run: |
+          echo "${{ toJSON(steps.changed-files-specific.outputs) }}"
+        shell:
+          bash
 
   test:
     name: Test changed-files
@@ -379,15 +434,6 @@ jobs:
           echo '${{ toJSON(steps.changed-files-custom-sha.outputs) }}'
         shell:
           bash
-      - name: Get branch name
-        id: branch-name
-        uses: tj-actions/branch-names@v5
-      - uses: nrwl/last-successful-commit-action@v1
-        id: last_successful_commit
-        with:
-          branch: ${{ steps.branch-name.outputs.base_ref_branch }}
-          workflow_id: 'test.yml'
-          github_token: ${{ secrets.GITHUB_TOKEN }}
       - name: Run changed-files with since_last_remote_commit set to true
         id: changed-files-since-last-remote-commit
         uses: ./
@@ -398,12 +444,25 @@ jobs:
           echo '${{ toJSON(steps.changed-files-since-last-remote-commit.outputs) }}'
         shell:
           bash
+      - name: Get branch name
+        id: branch-name
+        uses: tj-actions/branch-names@v5
+        if: github.event_name == 'pull_request'
+      - uses: nrwl/last-successful-commit-action@v1
+        id: last_successful_commit
+        if: github.event_name == 'pull_request'
+        with:
+          branch: ${{ steps.branch-name.outputs.base_ref_branch }}
+          workflow_id: 'test.yml'
+          github_token: ${{ secrets.GITHUB_TOKEN }}
       - name: Run changed-files with a custom base sha
+        if: github.event_name == 'pull_request'
         id: changed-files-custom-base-sha
         uses: ./
         with:
           base_sha: ${{ steps.last_successful_commit.outputs.commit_hash }}
       - name: Show output
+        if: github.event_name == 'pull_request'
         run: |
           echo '${{ toJSON(steps.changed-files-custom-base-sha.outputs) }}'
         shell:

HISTORY.md

@@ -1,5 +1,94 @@
 # Changelog
 
+## [Unreleased](https://github.com/tj-actions/changed-files/tree/HEAD)
+
+[Full Changelog](https://github.com/tj-actions/changed-files/compare/v1.3.1...HEAD)
+
+**Implemented enhancements:**
+
+- I cant get `since_last_remote_commit` to work properly on pull\_request event [\#276](https://github.com/tj-actions/changed-files/issues/276)
+
+## [v1.3.1](https://github.com/tj-actions/changed-files/tree/v1.3.1) (2021-12-04)
+
+[Full Changelog](https://github.com/tj-actions/changed-files/compare/v11.8...v1.3.1)
+
+**Merged pull requests:**
+
+- Fixed regression bug with base\_sha for pull\_request [\#278](https://github.com/tj-actions/changed-files/pull/278) ([jackton1](https://github.com/jackton1))
+- Prevent outputting remote not found error message. [\#277](https://github.com/tj-actions/changed-files/pull/277) ([jackton1](https://github.com/jackton1))
+- Upgraded to v11.8 [\#275](https://github.com/tj-actions/changed-files/pull/275) ([jackton1](https://github.com/jackton1))
+
+## [v11.8](https://github.com/tj-actions/changed-files/tree/v11.8) (2021-12-04)
+
+[Full Changelog](https://github.com/tj-actions/changed-files/compare/v1.3.0...v11.8)
+
+**Merged pull requests:**
+
+- Upgraded to v1.3.0 [\#274](https://github.com/tj-actions/changed-files/pull/274) ([jackton1](https://github.com/jackton1))
+
+## [v1.3.0](https://github.com/tj-actions/changed-files/tree/v1.3.0) (2021-12-04)
+
+[Full Changelog](https://github.com/tj-actions/changed-files/compare/v11.7...v1.3.0)
+
+**Implemented enhancements:**
+
+- \[Feature\] Improve error handling of non local commit reference [\#255](https://github.com/tj-actions/changed-files/issues/255)
+
+**Fixed bugs:**
+
+- \[BUG\] When running in a workflow generated by a dependabot BUMP PR, the action fails [\#268](https://github.com/tj-actions/changed-files/issues/268)
+
+**Closed issues:**
+
+- Fix code scanning alert - Warn when duplicate definitions are found. [\#267](https://github.com/tj-actions/changed-files/issues/267)
+
+**Merged pull requests:**
+
+- Resolve error setting the base sha [\#272](https://github.com/tj-actions/changed-files/pull/272) ([jackton1](https://github.com/jackton1))
+- Fixed error with test [\#270](https://github.com/tj-actions/changed-files/pull/270) ([jackton1](https://github.com/jackton1))
+- Resolve error adding remote [\#269](https://github.com/tj-actions/changed-files/pull/269) ([jackton1](https://github.com/jackton1))
+- Update base sha step [\#266](https://github.com/tj-actions/changed-files/pull/266) ([jackton1](https://github.com/jackton1))
+- Improve error handling [\#263](https://github.com/tj-actions/changed-files/pull/263) ([jackton1](https://github.com/jackton1))
+- Update README.md [\#262](https://github.com/tj-actions/changed-files/pull/262) ([jackton1](https://github.com/jackton1))
+- Updated README.md [\#260](https://github.com/tj-actions/changed-files/pull/260) ([jackton1](https://github.com/jackton1))
+- Updated README.md [\#258](https://github.com/tj-actions/changed-files/pull/258) ([jackton1](https://github.com/jackton1))
+- Upgraded to v11.7 [\#257](https://github.com/tj-actions/changed-files/pull/257) ([jackton1](https://github.com/jackton1))
+
+## [v11.7](https://github.com/tj-actions/changed-files/tree/v11.7) (2021-11-19)
+
+[Full Changelog](https://github.com/tj-actions/changed-files/compare/v1.2.2...v11.7)
+
+**Merged pull requests:**
+
+- Upgraded to v1.2.2 [\#256](https://github.com/tj-actions/changed-files/pull/256) ([jackton1](https://github.com/jackton1))
+
+## [v1.2.2](https://github.com/tj-actions/changed-files/tree/v1.2.2) (2021-11-19)
+
+[Full Changelog](https://github.com/tj-actions/changed-files/compare/v11.6...v1.2.2)
+
+**Fixed bugs:**
+
+- \[BUG\] pull request with `since_last_remote_commit = true` returns fatal: bad object [\#253](https://github.com/tj-actions/changed-files/issues/253)
+
+**Closed issues:**
+
+- Dependency Dashboard [\#27](https://github.com/tj-actions/changed-files/issues/27)
+
+**Merged pull requests:**
+
+- Updated git fetch to pull the last remote commit [\#254](https://github.com/tj-actions/changed-files/pull/254) ([jackton1](https://github.com/jackton1))
+- Update reviewdog/action-shellcheck action to v1.12 [\#252](https://github.com/tj-actions/changed-files/pull/252) ([renovate[bot]](https://github.com/apps/renovate))
+- Update reviewdog/action-shellcheck action to v1.11 [\#250](https://github.com/tj-actions/changed-files/pull/250) ([renovate[bot]](https://github.com/apps/renovate))
+- Upgraded to v11.6 [\#249](https://github.com/tj-actions/changed-files/pull/249) ([jackton1](https://github.com/jackton1))
+
+## [v11.6](https://github.com/tj-actions/changed-files/tree/v11.6) (2021-11-08)
+
+[Full Changelog](https://github.com/tj-actions/changed-files/compare/v1.2.1...v11.6)
+
+**Merged pull requests:**
+
+- Upgraded to v1.2.1 [\#248](https://github.com/tj-actions/changed-files/pull/248) ([jackton1](https://github.com/jackton1))
+
 ## [v1.2.1](https://github.com/tj-actions/changed-files/tree/v1.2.1) (2021-11-08)
 
 [Full Changelog](https://github.com/tj-actions/changed-files/compare/v11.5...v1.2.1)
@@ -8,10 +97,6 @@
 
 - \[Feature\] Improve documentation [\#244](https://github.com/tj-actions/changed-files/issues/244)
 
-**Closed issues:**
-
-- Dependency Dashboard [\#27](https://github.com/tj-actions/changed-files/issues/27)
-
 **Merged pull requests:**
 
 - Updated formatting of all modified debug message [\#247](https://github.com/tj-actions/changed-files/pull/247) ([jackton1](https://github.com/jackton1))

README.md

@@ -1,4 +1,5 @@
-[![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) [![Codacy Badge](https://app.codacy.com/project/badge/Grade/a3822d6c37f644bc99a5faa0bfb9c2c1)](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) [![Public workflows that use this action.](https://img.shields.io/endpoint?url=https%3A%2F%2Fapi-tj-actions1.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%2Fapi-tj-actions1.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)
@@ -12,7 +13,7 @@
 
 ## changed-files
 
-Retrieve all changed files relative to the default branch (`pull_request*` based events) or a previous commit (`push` based event) returning the **absolute path** to all changed files from the project root.
+Retrieve all changed files relative to the default branch (`pull_request*` based events) or the last remote commit (`push` based event) returning the **absolute path** to all changed files from the project root.
 
 ## Features
 
@@ -22,6 +23,7 @@ Retrieve all changed files relative to the default branch (`pull_request*` based
 *   Multiple repositories.
 *   Self hosted runners.
 *   GitHub Enterprise Server.
+*   Monorepos (Fetches only the last remote commit)
 *   Supports all platforms.
 *   List all files that have changed.
     *   Between the current pull request branch and the default branch.
@@ -37,6 +39,7 @@ Retrieve all changed files relative to the default branch (`pull_request*` based
 >
 > *   **IMPORTANT:** For `push` events you need to include `fetch-depth: 0` **OR** `fetch-depth: 2` depending on your use case.
 > *   When using `persist-credentials: false` with `actions/checkout@v2` you'll need to specify a `token` using the `token` input.
+> *   For monorepos were pulling all the branch history might not be desired the `fetch-depth` can be omitted for `pull_request` events.
 
 ```yaml
 name: CI
@@ -60,7 +63,7 @@ jobs:
 
       - name: Get changed files
         id: changed-files
-        uses: tj-actions/changed-files@v11.5
+        uses: tj-actions/changed-files@v1.3.1
 
       - name: List all modified files
         run: |
@@ -69,6 +72,16 @@ jobs:
           done
 ```
 
+If you feel generous and want to show some extra appreciation:
+
+Support this project with a :star:
+
+[![Buy me a coffee][buymeacoffee-shield]][buymeacoffee]
+
+[buymeacoffee]: https://www.buymeacoffee.com/jackton1
+
+[buymeacoffee-shield]: https://www.buymeacoffee.com/assets/img/custom_images/orange_img.png
+
 ## Outputs
 
 | Acronym   |  Meaning     |
@@ -112,7 +125,7 @@ jobs:
 | sha           |  `string`      |    `true`     | `${{ github.sha }}`           | Specify a different <br> commit SHA <br> used for <br> comparing changes  |
 | files\_from\_source\_file |  `string`      |    `false`     |                    | Source file <br> used to populate <br> the files input |
 | path | `string` | `false` |  | Relative path under <br> `GITHUB_WORKSPACE` <br> to the repository |
-| since\_last\_remote\_commit | `string` | `false` | `false` | Use the last commit on the remote <br> branch as the `base_sha`.<br> (Defaults to the previous commit). |
+| since\_last\_remote\_commit | `string` | `false` | `false` | Use the last commit on the remote <br> branch as the `base_sha`.<br> (Defaults to the previous commit). <br /> NOTE: This requires <br /> `fetch-depth: 0`|
 
 ## Example
 
@@ -123,11 +136,11 @@ jobs:
 
       - name: Get changed files using defaults
         id: changed-files
-        uses: tj-actions/changed-files@v11.5
+        uses: tj-actions/changed-files@v1.3.1
 
       - name: Get changed files using a comma separator
         id: changed-files-comma
-        uses: tj-actions/changed-files@v11.5
+        uses: tj-actions/changed-files@v1.3.1
         with:
           separator: ","
 
@@ -149,7 +162,7 @@ jobs:
 
       - name: Get specific changed files
         id: changed-files-specific
-        uses: tj-actions/changed-files@v11.5
+        uses: tj-actions/changed-files@v1.3.1
         with:
           files: |
             my-file.txt
@@ -187,14 +200,14 @@ jobs:
 
       - 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@v11.5
+        uses: tj-actions/changed-files@v1.3.1
         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@v11.5
+        uses: tj-actions/changed-files@v1.3.1
         with:
           files_from_source_file: |
             test/changed-files-list.txt
@@ -203,13 +216,13 @@ jobs:
 
       - name: Use a different commit SHA
         id: changed-files-custom-sha
-        uses: tj-actions/changed-files@v11.5
+        uses: tj-actions/changed-files@v1.3.1
         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@v11.5
+        uses: tj-actions/changed-files@v1.3.1
         with:
           base_sha: "2096ed0"
           
@@ -221,7 +234,7 @@ jobs:
 
       - name: Run changed-files with defaults on the dir1
         id: changed-files-for-dir1
-        uses: tj-actions/changed-files@v11.5
+        uses: tj-actions/changed-files@v1.3.1
         with:
           path: dir1
 
@@ -233,7 +246,7 @@ jobs:
 
       - name: Run changed-files using the last commit on the remote branch
         id: changed-files-since-last-remote-commit
-        uses: tj-actions/changed-files@v11.5
+        uses: tj-actions/changed-files@v1.3.1
         with:
           since_last_remote_commit: 'true'
 
@@ -250,7 +263,7 @@ jobs:
 
       - name: Get changed files
         id: changed-files
-        uses: tj-actions/changed-files@v11.5
+        uses: tj-actions/changed-files@v1.3.1
 
       - name: Pre-commit
         uses: pre-commit/action@v2.0.0
@@ -259,18 +272,10 @@ jobs:
           token: ${{ secrets.github_token }}
 ```
 
-![Screen Shot 2021-07-06 at 2 50 23 PM](https://user-images.githubusercontent.com/17484350/124651978-96ed5280-de69-11eb-86d5-396a4c1a980f.png)
-
-![Screen Shot 2021-07-17 at 10 52 48 AM](https://user-images.githubusercontent.com/17484350/126040772-30b65afb-a6b5-4150-b312-ac2017ba7b98.png)
+<img width="1147" alt="Screen Shot 2021-11-19 at 4 59 21 PM" src="https://user-images.githubusercontent.com/17484350/142696936-8b7ca955-7ef9-4d53-9bdf-3e0008e90c3f.png">
 
 *   Free software: [MIT license](LICENSE)
 
-If you feel generous and want to show some extra appreciation:
-
-Support me with a :star:
-
-[![Buy me a coffee][buymeacoffee-shield]][buymeacoffee]
-
 ## Known Limitation
 
 > NOTE: :warning:

action.yml

@@ -95,10 +95,15 @@ runs:
         INPUT_FILES: ${{ inputs.files }}
         INPUT_FILES_FROM_SOURCE_FILE: ${{ inputs.files_from_source_file }}
     - run: |
+        # "Set base sha..."
         if [[ -n "${{ inputs.base_sha }}" ]]; then
           echo "::set-output name=base_sha::${{ inputs.base_sha }}"
         elif [[ "${{ inputs.since_last_remote_commit }}" == "true" ]]; then
-          echo "::set-output name=base_sha::${{ github.event.before }}"
+          if [[ "${{ github.event.before }}" != "0000000000000000000000000000000000000000" ]]; then
+            echo "::set-output name=base_sha::${{ github.event.before }}"
+          else
+            echo "::set-output name=base_sha::${{ github.sha }}"
+          fi
         fi
       id: base-sha
       shell: bash

entrypoint.sh

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-set -e
+set -eu
 
 echo "::group::changed-files"
 
@@ -24,6 +24,7 @@ git ls-remote --exit-code temp_changed_files 1>/dev/null 2>&1 && exit_status=$?
 if [[ $exit_status -ne 0 ]]; then
   echo "No 'temp_changed_files' remote found"
   echo "Creating 'temp_changed_files' remote..."
+  git remote remove temp_changed_files 2>/dev/null || true
   git remote add temp_changed_files "https://${INPUT_TOKEN}@${SERVER_URL}/${GITHUB_REPOSITORY}"
 else
   echo "Found 'temp_changed_files' remote"
@@ -37,8 +38,12 @@ else
   CURRENT_SHA=$INPUT_SHA && exit_status=$? || exit_status=$?
 fi
 
+git rev-parse --quiet --verify "$CURRENT_SHA^{commit}" 1>/dev/null 2>&1 && exit_status=$? || exit_status=$?
+
+
 if [[ $exit_status -ne 0 ]]; then
-  echo "::warning::Unable to determine the current head sha"
+  echo "::warning::Unable to locate the current sha: $CURRENT_SHA"
+  echo "::warning::You seem to be missing 'fetch-depth: 0' or 'fetch-depth: 2'. See https://github.com/tj-actions/changed-files#usage"
   git remote remove temp_changed_files
   exit 1
 fi
@@ -51,10 +56,13 @@ if [[ -z $GITHUB_BASE_REF ]]; then
     PREVIOUS_SHA=$(git rev-parse HEAD^1 2>&1) && exit_status=$? || exit_status=$?
   else
     PREVIOUS_SHA=$INPUT_BASE_SHA && exit_status=$? || exit_status=$?
+    TARGET_BRANCH=$(git name-rev --name-only "$PREVIOUS_SHA" 2>&1) && exit_status=$? || exit_status=$?
   fi
+  
+  git rev-parse --quiet --verify "$PREVIOUS_SHA^{commit}" 1>/dev/null 2>&1 && exit_status=$? || exit_status=$?
 
   if [[ $exit_status -ne 0 ]]; then
-    echo "::warning::Unable to determine the previous commit sha"
+    echo "::warning::Unable to locate the previous sha: $PREVIOUS_SHA"
     echo "::warning::You seem to be missing 'fetch-depth: 0' or 'fetch-depth: 2'. See https://github.com/tj-actions/changed-files#usage"
     git remote remove temp_changed_files
     exit 1
@@ -62,15 +70,21 @@ if [[ -z $GITHUB_BASE_REF ]]; then
 else
   TARGET_BRANCH=$GITHUB_BASE_REF
   CURRENT_BRANCH=$GITHUB_HEAD_REF
-  git fetch temp_changed_files --no-tags -u "${TARGET_BRANCH}":"${TARGET_BRANCH}"
+
   if [[ -z $INPUT_BASE_SHA ]]; then
+    git fetch --no-tags -u --progress --depth=1 temp_changed_files "${TARGET_BRANCH}":"${TARGET_BRANCH}" && exit_status=$? || exit_status=$?
     PREVIOUS_SHA=$(git rev-parse "${TARGET_BRANCH}" 2>&1) && exit_status=$? || exit_status=$?
   else
+    git fetch --no-tags -u --progress --depth=1 temp_changed_files "$INPUT_BASE_SHA" && exit_status=$? || exit_status=$?
     PREVIOUS_SHA=$INPUT_BASE_SHA
+    TARGET_BRANCH=$(git name-rev --name-only "$PREVIOUS_SHA" 2>&1) && exit_status=$? || exit_status=$?
   fi
 
+  git rev-parse --quiet --verify "$PREVIOUS_SHA^{commit}" 1>/dev/null 2>&1 && exit_status=$? || exit_status=$?
+
   if [[ $exit_status -ne 0 ]]; then
-    echo "::warning::Unable to determine the base ref sha for ${TARGET_BRANCH}"
+    echo "::warning::Unable to locate the previous sha: $PREVIOUS_SHA"
+    echo "::warning::You seem to be missing 'fetch-depth: 0' or 'fetch-depth: 2'. See https://github.com/tj-actions/changed-files#usage"
     git remote remove temp_changed_files
     exit 1
   fi
@@ -78,8 +92,9 @@ fi
 
 echo "Retrieving changes between $PREVIOUS_SHA ($TARGET_BRANCH) → $CURRENT_SHA ($CURRENT_BRANCH)"
 
+echo "Getting diff..."
+
 if [[ -z "${INPUT_FILES[*]}" ]]; then
-  echo "Getting diff..."
   ADDED=$(git diff --diff-filter=A --name-only "$PREVIOUS_SHA" "$CURRENT_SHA" | awk -v d="$INPUT_SEPARATOR" '{s=(NR==1?s:s d)$0}END{print s}')
   COPIED=$(git diff --diff-filter=C --name-only "$PREVIOUS_SHA" "$CURRENT_SHA" | awk -v d="$INPUT_SEPARATOR" '{s=(NR==1?s:s d)$0}END{print s}')
   DELETED=$(git diff --diff-filter=D --name-only "$PREVIOUS_SHA" "$CURRENT_SHA" | awk -v d="$INPUT_SEPARATOR" '{s=(NR==1?s:s d)$0}END{print s}')
@@ -91,7 +106,6 @@ if [[ -z "${INPUT_FILES[*]}" ]]; then
   ALL_CHANGED_AND_MODIFIED=$(git diff --diff-filter="*ACDMRTUX" --name-only "$PREVIOUS_SHA" "$CURRENT_SHA" | awk -v d="$INPUT_SEPARATOR" '{s=(NR==1?s:s d)$0}END{print s}')
   ALL_MODIFIED=$(git diff --diff-filter="ACMR" --name-only "$PREVIOUS_SHA" "$CURRENT_SHA" | awk -v d="$INPUT_SEPARATOR" '{s=(NR==1?s:s d)$0}END{print s}')
 else
-
   echo "Input files: ${INPUT_FILES[*]}"
 
   FILES=$(echo "${INPUT_FILES[*]}" | awk '{gsub(/ /,"\n"); print $0;}' | awk -v d="|" '{s=(NR==1?s:s d)$0}END{print s}')