From f613009ecd1d79252eca29f252e72e49e31c74a2 Mon Sep 17 00:00:00 2001
From: Luke Shumaker <LukeShu@sbcglobal.net>
Date: Thu, 18 Oct 2012 17:28:31 -0400
Subject: rewrite jh-checksource

---
 jh-checksource.sh | 98 +++++++++++++++++++++++++++++++++++--------------------
 1 file changed, 63 insertions(+), 35 deletions(-)

diff --git a/jh-checksource.sh b/jh-checksource.sh
index ef3cf47..89046e4 100644
--- a/jh-checksource.sh
+++ b/jh-checksource.sh
@@ -3,43 +3,71 @@
 sep='<nofileevercontainsthis>'
 resep='@'
 
-safe_types=(
-	'.*text.*'
-	'(GIF|JPEG|PNG) image data.*'
-)
-safe_files=("$@")
-
-unsafe_files="$(mktemp)"
-
-safevar="$(mktemp)"
-find . -type f -exec file -F"$sep" {} + | while read line; do
-	file="$(echo "$line"|sed "s${resep}${sep}.*${resep}${resep}")"
-	type="$(echo "$line"|sed "s${resep}.*${sep}\s*${resep}${resep}")"
-	echo false > "$safevar"
-	if [[ "$file" =~ ".*/\.git/.*" ]]; then
-		echo true > "$safevar"
-	fi
-	for filename in "${safe_files[@]}"; do
-		if [[ "$file" = "$filename" ]]; then
-			echo true > "$safevar"
+safe_types_regexp=('text' '(GIF|JPEG|PNG) image data')
+safe_types_string=()
+safe_files_rexexp=('.*/\.git/.*')
+safe_files_string=()
+
+normalize_filename() {
+	local cwd="`pwd`"
+	readlink -m -- "$1"|sed "s|^$cwd/|./|"
+}
+
+matches_string() {
+	local needle=$1
+	shift
+	for straw in "$@"; do
+		if [[ "$needle" = "$straw" ]]; then
+			return 0
 		fi
 	done
-	for filetype in "${safe_types[@]}"; do
-		if [[ "$type" =~ "$filetype" ]]; then
-			echo true > "$safevar"
+	return 1
+}
+
+matches_regexp() {
+	local needle=$1
+	shift
+	for straw in "$@"; do
+		if [[ "$needle" =~ $straw ]]; then
+			return 0
 		fi
 	done
-	if [[ "$(cat "$safevar")" = 'true' ]]; then
-		printf "%s\n" "$file"
+	return 1
+}
+
+main() {
+	# Parse arguments
+	for file in "$@"; do safe_files_string+=("$(normalize_filename "$file")"); done
+
+	# Init
+	unsafe_files="$(mktemp)"
+
+	# Heavy lifting
+	find . -type f -exec file -F"$sep" {} + | while read line; do
+		file="$(echo "$line"|sed "s${resep}${sep}.*${resep}${resep}")"
+		type="$(echo "$line"|sed "s${resep}.*${sep}\s*${resep}${resep}")"
+
+		file="$(normalize_filename "$file")"
+
+		if \
+			matches_string "$file" "${safe_files_string[@]}" || \
+			matches_string "$type" "${safe_types_string[@]}" || \
+			matches_regexp "$file" "${safe_files_regexp[@]}" || \
+			matches_regexp "$type" "${safe_types_regexp[@]}" ; then
+			: # do nothing
+		else
+			printf "%s\n" "$file"
+		fi
+	done > "$unsafe_files"
+
+	if [[ -n "$(cat "$unsafe_files")" ]]; then
+		echo "==> WARNING: The source directory `pwd` contains binary files:"
+		sed 's/./  -> &/' "$unsafe_files"
+		rm -f "$unsafe_files"
+		exit 1
+	else
+		rm -f "$unsafe_files"
 	fi
-done > "$unsafe_files"
-rm -f "$safevar"
-
-if [[ -n "$(cat "$unsafe_files")" ]]; then
-	echo " ==> The source directory `pwd` contains binary files:"
-	sed 's/./  ->/' "$unsafe_files"
-	rm -f "$unsafe_files"
-	exit 1
-else
-	rm -f "$unsafe_files"
-fi
+}
+
+main "$@"
-- 
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