Add color legend to -h output

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1 files changed, 12 insertions, 15 deletions

diff --git a/is_required b/is_required
index f64c95f..857290f 100755
--- a/is_required
+++ b/is_required
@@ -20,21 +20,18 @@ else
 fi
 
 usage() {
-    cat <<EOF
-Usage: $(basename "$0") [OPTIONS] <package>
-
-Show SBo packages that list <package> in their REQUIRES field.
-
-Options:
-  -i   show only installed dependents
-  -u   show only uninstalled dependents
-  -r   recursive: also find what requires those packages (one level)
-  -h   this help
-
-Symbols:
-  [I]  installed on this system
-  [ ]  not installed
-EOF
+    printf "Usage: %s [OPTIONS] <package>\n" "$(basename "$0")"
+    printf "\nShow SBo packages that list <package> in their REQUIRES field.\n"
+    printf "\nOptions:\n"
+    printf "  -i   show only installed dependents\n"
+    printf "  -u   show only uninstalled dependents\n"
+    printf "  -r   recursive: also find what requires those packages (one level)\n"
+    printf "  -h   this help\n"
+    printf "\nSymbols and colors:\n"
+    printf "  ${C_INSTALLED}[I] installed${C_RESET}    package is present in %s\n" "$PKG_LOG"
+    printf "  ${C_MISSING}[ ] missing${C_RESET}     package is not installed\n"
+    printf "  ${C_TARGET}<package>${C_RESET}     queried package name (in header)\n"
+    printf "  ${C_CATEGORY}(category)${C_RESET}    SBo category of the dependent\n"
     exit 0
 }