Added ability to use a file list

Author: kcheriyath

README.md

@@ -4,7 +4,9 @@ GitHub action that runs `csvlint`.
 
 The project is heavily based on salt-lint-action, which was created by Roald Nefs and the action from blackstar257 at [docker-csvlint](https://github.com/blackstar257/docker-csvlint).
 
-This action adds few additional parameters like file paths and patterns to `docker-csvlint`. Also added is a configurable exit status.
+This action adds few additional parameters like file paths and patterns to `docker-csvlint`. 
+
+Also added is the ability to use an external file list and a configurable exit status.
 
 
 
@@ -25,14 +27,17 @@ jobs:
     - name: Run csv-lint
       uses: kcheriyath/csvlinter@main
       with:
+        file_list: "space delmited list of files including path"
         find_pattern: "*.csv"
         find_path: "./data"
         fail_on_error: "false"
         extra_params: "--lazyquotes"
 ```
 
 
-find_path: (optional) when defined, find command is used to search for csv files in the path, relative to project root. defaults to . (`dot`)
+file_list: "(optional) if set, linter will use this file list only and find* parameters are ignored. Use as a static list or with jitterbit/get-changed-files to check only new files."
+
+find_path: (optional) if set, find command is used to search for csv files in the path, relative to project root. defaults to . (`dot`)
 
 find_pattern: (optional) defaults to *.csv.
 
@@ -53,10 +58,11 @@ NOTE: The default settings validate that a CSV conforms to [RFC 4180](https://to
 
 ### Todo
 
-- [ ] Ability to use a file list for only new/changed files.  
+
 
 ### Done ✓
 
 - [x] Configurable exit status with fail_on_error.
 - [x] File path 
 - [x] File pattern 
+- [x] Ability to use a file list for only new/changed files.  

action.yml

@@ -2,6 +2,9 @@ name: "csvlinter"
 description: "CSV Linter action based on csvlint"
 author: "K Cheriyath"
 inputs:
+  file_list: # id of input
+    description: "(optional) when defined, linter will use this file list only and find* parameters are ignored. Use as a static list or with jitterbit/get-changed-files to check only new files."
+    required: false
   find_path: # id of input
     description: "(optional) when defined, find command is used to search for csv files in the path, relative to project root. defaults to ."
     required: false

entrypoint.sh

@@ -1,7 +1,5 @@
 #!/bin/bash
 
-set -u
-
 # Set variables
 ACTIONSTATUS=0
 EXITSTATUS=0
@@ -17,20 +15,27 @@ INPUT_FAIL_ON_ERROR="${INPUT_FAIL_ON_ERROR:-true}"
 
 cd "${GITHUB_WORKSPACE}"
 
-if [ ! -d "${INPUT_FIND_PATH}" ]; then
-  2>&1 echo "==> Can't find ${INPUT_FIND_PATH}. Please ensure INPUT_FIND_PATH is a directory relative to the root of your project."
-  exit 1
-fi
-
-if [[ -n "${INPUT_FIND_PATTERN}" ]]; then
-    2>&1 echo "==> Pattern ${INPUT_FIND_PATTERN} specified. Finding files matching this pattern."
+if [ -n "${INPUT_FILE_LIST}" ]; then
 
-    readarray -d '' FILELIST < <(find "${INPUT_FIND_PATH}" -name "${INPUT_FIND_PATTERN}" -print0)
+  2>&1 echo "==> File List ${INPUT_FILE_LIST} specified. Linting files matching this pattern."
+  IFS=', ' read -r -a FILELIST <<< "${INPUT_FILE_LIST}"
 else
-    2>&1 echo "INPUT_FIND_PATTERN is not set. Using '*.csv'"
-    readarray -d '' FILELIST < <(find "${INPUT_FIND_PATH}" -name "*.csv" -print0)
+
+    if [ ! -d "${INPUT_FIND_PATH}" ]; then
+          2>&1 echo "==> Can't find ${INPUT_FIND_PATH}. Please ensure INPUT_FIND_PATH is a directory relative to the root of your project."
+          exit 1
+    fi
+    if [[ -n "${INPUT_FIND_PATTERN}" ]]; then
+      2>&1 echo "==> Pattern ${INPUT_FIND_PATTERN} specified. Finding files matching this pattern."
+
+      readarray -d '' FILELIST < <(find "${INPUT_FIND_PATH}" -name "${INPUT_FIND_PATTERN}" -print0)
+    else
+      2>&1 echo "INPUT_FIND_PATTERN is not set. Using '*.csv'"
+      readarray -d '' FILELIST < <(find "${INPUT_FIND_PATH}" -name "*.csv" -print0)
+    fi
 fi
 
+
 FILECOUNT=${#FILELIST[@]}