From 8c6f276ea5961fa51474aaa203c6d06226acbaa8 Mon Sep 17 00:00:00 2001
From: Tonye Jack <jtonye@ymail.com>
Date: Sat, 17 Jul 2021 15:13:26 -0400
Subject: [PATCH] Added support for detecting non specific file changes. (#137)

---
 .github/workflows/test.yml | 20 ++++++++++++++++++++
 README.md                  |  4 +++-
 action.yml                 |  6 ++++++
 entrypoint.sh              | 13 +++++++++++++
 4 files changed, 42 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 096fb90a..99282d9a 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -198,3 +198,23 @@ jobs:
           echo "${{ toJSON(steps.changed-files-custom-base-sha.outputs) }}"
         shell:
           bash
+      - name: Run changed-files with specific files (only-changed)
+        id: changed-files-specific-only-changed
+        uses: ./
+        with:
+          files: |
+            .github/workflows/test.yml
+      - name: Verify only_changed files
+        if: steps.changed-files-specific-only-changed.outputs.other_changed_files != ''
+        run: |
+          if [[ "${{ steps.changed-files-specific-only-changed.outputs.only_changed }}" != "false" ]]; then
+            echo "Invalid output: Expected (false) got (${{ steps.changed-files-specific-only-changed.outputs.only_changed }})"
+            exit 1
+          fi
+        shell:
+          bash
+      - name: Show output
+        run: |
+          echo "${{ toJSON(steps.changed-files-specific-only-changed.outputs) }}"
+        shell:
+          bash
diff --git a/README.md b/README.md
index d8657655..d65b763e 100644
--- a/README.md
+++ b/README.md
@@ -79,7 +79,9 @@ jobs:
 
 |   Output             |    type      |  example                           |         description                      |
 |:--------------------:|:------------:|:----------------------------------:|:----------------------------------------:|
-| any_changed          |  `string`    |  `true` OR `false`                 |  Returns `true` when any of the filenames provided using the `files` input has changed |
+| any_changed          |  `string`    |  `true` OR `false`                 | Returns `true` when any of the filenames provided using the `files` input has changed |
+| only_changed          |  `string`    |  `true` OR `false`                 | Returns `true` when only files provided using the `files` input have changed. |
+| other_changed_files   |  `string`    |  `'new.txt path/to/file.png ...'`  | Select all modified files <br/> not listed in the files input <br /> i.e. *a  combination of all added, <br /> copied and modified files (ACM).*  |
 | all_modified_files   |  `string`    |  `'new.txt path/to/file.png ...'`  |  Select all modified files <br /> i.e. *a combination of all added, <br />copied and modified files (ACM).*  |
 | all_changed_files    |  `string`    |  `'new.txt path/to/file.png ...'`  |  Select all paths (\*) <br /> i.e. *a combination of all options below.*  |
 | added_files          |  `string`    |  `'new.txt path/to/file.png ...'`  |  Select only files that are Added (A)    |
diff --git a/action.yml b/action.yml
index e9d3c199..d800295d 100644
--- a/action.yml
+++ b/action.yml
@@ -60,6 +60,12 @@ outputs:
   any_changed:
     description: Return true only when any files provided using the files input have changed.
     value: ${{ steps.changed-files.outputs.any_changed }}
+  only_changed:
+    description: Return true only when only files provided using the files input have changed.
+    value: ${{ steps.changed-files.outputs.only_changed }}
+  other_changed_files:
+    description: Return list of changed files not listed in the files input.
+    value: ${{ steps.changed-files.outputs.other_changed_files }}
 
 runs:
   using: 'composite'
diff --git a/entrypoint.sh b/entrypoint.sh
index db26ceed..8fca7be4 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -139,14 +139,27 @@ echo "All modified files: $ALL_MODIFIED_FILES"
 if [[ -n "$UNIQUE_FILES" ]]; then
   # shellcheck disable=SC2001
   ALL_INPUT_FILES=$(echo "$UNIQUE_FILES" | tr "\n" " " | xargs)
+  ALL_OTHER_CHANGED_FILES=$(git diff --diff-filter="ACM" --name-only "$PREVIOUS_SHA" "$CURRENT_SHA")
+
+  OTHER_CHANGED_FILES=$(echo "${ALL_OTHER_CHANGED_FILES[@]}" "${ALL_MODIFIED_FILES[@]}" | tr ' ' '\n' | sort | uniq -u | tr "\n" " " | xargs)
 
   echo "Input files: ${ALL_INPUT_FILES[*]}"
   echo "Matching modified files: ${ALL_MODIFIED_FILES[*]}"
+
   if [[ -n "$ALL_MODIFIED_FILES" ]]; then
     echo "::set-output name=any_changed::true"
   else
     echo "::set-output name=any_changed::false"
   fi
+
+  if [[ -n "$OTHER_CHANGED_FILES" ]]; then
+    echo "Non Matching modified files: ${OTHER_CHANGED_FILES[*]}"
+    echo "::set-output name=only_changed::false"
+    echo "::set-output name=other_changed_files::$OTHER_CHANGED_FILES"
+  else
+    echo "::set-output name=only_changed::true"
+  fi
+
 fi
 
 echo "::set-output name=added_files::$ADDED"