Improve formatting of dep in ob_parse_dep().

1 files changed, 16 insertions, 6 deletions

diff --git a/lib/deps.sh b/lib/deps.sh
index 5584e65..a423413 100644
--- a/lib/deps.sh
+++ b/lib/deps.sh
@@ -90,12 +90,22 @@ ob_parse_dep()
 	shift $(($OPTIND - 1))
 
 	if [ ${#} -eq 1 ]; then
-		# Separate components with spaces.
-		_obpd_dep="$(echo "${1}" | \
-			sed 's/\([(\[]\)/ \1/g;s/\([<>=][<>=]*\)/\1 /g')"
-		# Remove leading, trailing, and duplicate spaces.
-		_obpd_dep="$(echo "${_obpd_dep}" | \
-			sed 's/\t/ /g;s/^ *//;s/ *$//;s/  */ /g') "
+		_obpd_dep="$(printf '%s\n' "${1}" | sed -n '
+			H;                        # Store each input line in the hold space.
+			${
+			  g;                      # Restore everything to the pattern space.
+			  s/[\t\n]/ /g;           # Replace tabs and newlines with spaces.
+			  s/ *\([(\[<]\) */ \1/g; # One space before "(", "[", and "<".
+			  s/ *\([)\]>]\) */\1 /g; # One space after "(", "[", and "<".
+			  s/ *\(<[<=]\) */\1 /g;  # One space after "<<" and "<=".
+			  s/ *\(>[>=]\) */\1 /g;  # One space after ">>" and ">=".
+			  s/ *\(=\) */\1 /g;      # One space after "=".
+			  s/^ *//;                # Remove leading spaces.
+			  s/ *$//;                # Remove trailing spaces.
+			  s/  */ /g;              # Remove duplicate spaces.
+			  p;                      # Print the pattern space.
+			};
+			')"
 	else
 		_ob_return 125
 		return ${?}