Add only-diff mode (#6)

* Add options for onlydiff mode

* Add -x flag

Author: MinyazevR

action.yml

@@ -76,6 +76,10 @@ inputs:
     description: |-
       Is used to read a compile command database.
     default: ""
+  only-diff:
+    description: |-
+      Is used to check only modified and appended files.
+    default: ""
 outputs:
   warnings-count:
     description: 'Total warnings count'
@@ -148,6 +152,7 @@ runs:
         VISIT_IMPLICIT_CODE: ${{ inputs.visit-implicit-code }}
         CLAZY_CHECKS_AS_ERRORS: ${{ inputs.warnings_as_errors }}
         IGNORE_HEADERS : ${{ inputs.ignore-headers }}
+        ONLY_DIFF: ${{ inputs.only-diff }}
       run: |
         PATH=~/.local/clazy/bin:$PATH "$GITHUB_ACTION_PATH/clazy.sh"
 

clazy.sh

@@ -1,8 +1,10 @@
 #!/bin/bash
+set -x
 
 options=()
 extra_args=()
 extra_args_before=()
+files=()
 
 for pair in $EXTRA_ARG; do
     extra_args+=( "--extra-arg=$pair" )
@@ -35,12 +37,22 @@ fi
 
 pattern='^(.*?):([0-9]+):([0-9]+): (.+): (.+) \[(.*)\]$'
 
-IFS=',' read -r -a extensions <<< "$EXTENSIONS"
-for ext in "${extensions[@]}"; do
-    while IFS= read -r -d '' file; do
-        files+=($(realpath "$file"))
-    done < <(find . -name "*.$ext" -print0)
-done
+if [[ -n "$ONLY_DIFF" ]]; then
+    for file in $(git diff --name-only HEAD^1 HEAD); do
+        file_extension="${file##*.}"
+        if echo "$EXTENSIONS" | grep -q "$file_extension"; then
+            files+=("$(realpath "$file")")
+       fi
+    done
+else
+    IFS=',' read -r -a extensions <<< "$EXTENSIONS"
+    for ext in "${extensions[@]}"; do
+        while IFS= read -r -d '' file; do
+            files+=($(realpath "$file"))
+        done < <(find . -name "*.$ext" -print0)
+    done
+
+fi
 
 output=$(clazy-standalone --checks="$CHECKS" -p="$DATABASE" \
     --header-filter="$HEADER_FILTER" --ignore-dirs="$IGNORE_DIRS" \