Add a formatting script for Travis CI

Author: aaronfranke

.travis.yml

@@ -0,0 +1,18 @@
+dist: bionic
+
+stages:
+  - build
+
+matrix:
+  include:
+    - name: Static checks (format.sh)
+      stage: build
+      os: linux
+      addons:
+        apt:
+          packages:
+            - dos2unix
+            - recode
+
+script:
+  - bash ./format.sh

format.sh

@@ -0,0 +1,39 @@
+#!/bin/bash
+
+# Loops through all text files tracked by Git.
+git grep -zIl '' |
+while IFS= read -rd '' f; do
+    # Exclude csproj and hdr files.
+    if [[ $f == *"csproj" ]]; then
+        continue
+    elif [[ $f == *"hdr" ]]; 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";
+done
+
+git diff > patch.patch
+FILESIZE=$(stat -c%s patch.patch)
+MAXSIZE=5
+
+# If no patch has been generated all is OK, clean up, and exit.
+if (( FILESIZE < MAXSIZE )); then
+    printf "Files in this commit comply with the formatting rules.\n"
+    rm -f patch.patch
+    exit 0
+fi
+
+# A patch has been created, notify the user, clean up, and exit.
+printf "\n*** The following differences were found between the code "
+printf "and the formatting rules:\n\n"
+cat patch.patch
+printf "\n*** Aborting, please fix your commit(s) with 'git commit --amend' or 'git rebase -i <hash>'\n"
+rm -f patch.patch
+exit 1