add usage help to debian/util.sh

debian/util.sh

@@ -328,14 +328,66 @@ build_all () {
   cat ../log/changes
 }
 
-while getopts 'd' o "$@"; do
+usage () {
+  cat >&2 <<EOF
+$0 [opts] [cmd] [cmd-opts]
+
+options:
+
+  -d Enable debugging mode.
+
+commands:
+
+  archive-orig
+
+  build-all
+
+    -a Specify architectures
+    -b Bundle downloaded libraries in source package
+    -c Specify distributions
+    -d Enable cowbuilder debug hook
+    -j Build debs in parallel
+    -n Nightly build
+    -m [ quicktest ]
+      Choose custom list of modules to build
+    -s [ paranoid | reckless ]
+      Set FS bootstrap/build -j flags
+    -v Set version
+    -z Set compression level
+
+  build-debs <distro> <dsc-file> <architecture>
+
+    -d Enable cowbuilder debug hook
+
+  create-dbg-pkgs
+
+  create-dsc <distro> <orig-file>
+
+    -m [ quicktest ]
+      Choose custom list of modules to build
+    -s [ paranoid | reckless ]
+      Set FS bootstrap/build -j flags
+
+  create-orig <treeish>
+
+    -b Bundle downloaded libraries in source package
+    -n Nightly build
+    -v Set version
+    -z Set compression level
+
+EOF
+  exit 1
+}
+
+while getopts 'dh' o "$@"; do
   case "$o" in
     d) set -vx;;
+    h) usage;;
   esac
 done
 shift $(($OPTIND-1))
 
-cmd="$1"
+cmd="$1"; [ -n "$cmd" ] || usage
 shift
 case "$cmd" in
   archive-orig) archive_orig "$@" ;;
@@ -344,5 +396,6 @@ case "$cmd" in
   create-dbg-pkgs) create_dbg_pkgs ;;
   create-dsc) create_dsc "$@" ;;
   create-orig) create_orig "$@" ;;
+  *) usage ;;
 esac