More scripts support

Hooks/scripts.d/pytest

@@ -4,5 +4,8 @@
 
 if [ -d venv ]; then
     source venv/bin/activate
+elif [ -f requirements.txt ]; then
+    python3 -m venv venv
+    venv/bin/python3 -m pip install -r requirements.txt
 fi
 python3 -m pytest

Hooks/scripts.d/whitespace

@@ -2,11 +2,6 @@
 
 # Sourced from https://github.com/git/git/blob/master/templates/hooks--pre-commit.sample
 
-if egrep -irl '\s\+$' .; then
-    echo The above lines have trailing whitespace. Run "sed -i 's/\s\+$//'" on the affected files.
-    exit 1
-fi
-
 if git rev-parse --verify HEAD >/dev/null 2>&1
 then
 	against=HEAD
@@ -18,6 +13,9 @@ fi
 # Redirect output to stderr.
 exec 1>&2
 
-
 # If there are whitespace errors, print the offending file names and fail.
-exec git diff-index --check --cached $against --
+git diff-index --check --cached $against --
+if [ $? -ne 0 ]; then
+    echo The above lines have trailing whitespace. Run "sed -i 's/\s\+$//'" on the affected files.
+    exit 1
+fi