Update formatting script and use GitHub Actions

Author: aaronfranke

.gitattributes

@@ -0,0 +1,2 @@
+# Normalize EOL for all files that Git considers text files.
+* text=auto eol=lf

.github/dependabot.yml

@@ -0,0 +1,6 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "daily"

.github/workflows/static_checks.yml

@@ -0,0 +1,19 @@
+name: 📊 Static Checks
+on: [push, pull_request]
+
+jobs:
+  format:
+    name: File formatting (file_format.sh)
+    runs-on: ubuntu-20.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Install dependencies
+        run: |
+          sudo apt-get update -qq
+          sudo apt-get install -qq dos2unix recode
+
+      - name: File formatting checks (file_format.sh)
+        run: |
+          bash ./file_format.sh

appveyor.yml

@@ -10,13 +10,6 @@ configuration: Release
 environment:
   APPVEYOR_YML_DISABLE_PS_LINUX: true
 
-install:
-- sh: |
-    if [ "$(uname)" != "Darwin" ]; then
-      sudo apt-get update -y
-      sudo apt-get install -y dos2unix recode
-    fi
-    
 build_script:
   - ps: |
       New-Item -Path . -Name "build" -ItemType "directory"
@@ -33,12 +26,6 @@ build_script:
       cmake --build . --config ${CONFIGURATION}
       cd ../
 
-test_script:
-  - sh: |
-      if [ "$(uname)" != "Darwin" ]; then
-        bash ./format.sh
-      fi
-
 artifacts:
   # Linux
   - path: bin/basisu

format.sh renamed to file_format.sh

@@ -1,4 +1,9 @@
-#!/bin/bash
+#!/usr/bin/env bash
+
+# This script ensures proper POSIX text file formatting and a few other things.
+
+set -uo pipefail
+IFS=$'\n\t'
 
 # Loops through all text files tracked by Git.
 git grep -zIl '' |
@@ -15,18 +20,19 @@ while IFS= read -rd '' f; do
     elif [[ $f == *"min.js" ]]; then
         continue
     fi
-    # Ensures that files are UTF-8 formatted.
-    recode UTF-8 $f 2> /dev/null
-    # Ensures that files have LF line endings.
-    dos2unix $f 2> /dev/null
-    # Ensures that files do not contain a BOM.
-    sed -i '1s/^\xEF\xBB\xBF//' "$f"
-    # Ensures that files end with newline characters.
-    tail -c1 < "$f" | read -r _ || echo >> "$f";
+    # Ensure that files are UTF-8 formatted.
+    recode UTF-8 "$f" 2> /dev/null
+    # Ensure that files have LF line endings and do not contain a BOM.
+    dos2unix "$f" 2> /dev/null
+    # Remove trailing space characters and ensures that files end
+    # with newline characters. -l option handles newlines conveniently.
+    perl -i -ple 's/\s*$//g' "$f"
+    # Remove the character sequence "== true" if it has a leading space.
+    perl -i -pe 's/\x20== true//g' "$f"
 done
 
 git diff > patch.patch
-FILESIZE=$(stat -c%s patch.patch)
+FILESIZE="$(stat -c%s patch.patch)"
 MAXSIZE=5
 
 # If no patch has been generated all is OK, clean up, and exit.