modifs.mineures sans commentaires

bash/src/base.args.sh

@@ -44,6 +44,9 @@ usage
   USAGE
       \$MYNAME [options] FILE
   ~~~
+  Peut contenir autant de lignes que nécessaire. Chaque ligne est préfixée du
+  nom du script, jusqu'à la première ligne vide. Ensuite, les lignes sont
+  affichées telles quelles.
 
 +|-
 : méthode d'analyse des arguments.
@@ -236,21 +239,33 @@ function __parse_args() {
             help="$help: $__DESC"
         fi
 
+        local first usage nl=$'\n'
         local prefix="    $MYNAME "
-        local -a usages; local usage="$__USAGE"
-        [ -n "$usage" ] || usage="[options]"
-        IFS=$'\n' read -a usages -d "" <<<"$usage"
+        local usages="$__USAGE"
+        [ -n "$usages" ] || usages="[options]"
         help="$help
 
 USAGE"
-        for usage in "${usages[@]}"; do
-            [ -n "$usage" ] || continue
+        first=1
+        while [ -n "$usages" ]; do
+            usage="${usages%%$nl*}"
+            if [ "$usage" != "$usages" ]; then
+                usages="${usages#*$nl}"
+            else
+                usages=
+            fi
+            if [ -n "$first" ]; then
+                first=
+                [ -z "$usage" ] && continue
+            else
+                [ -z "$usage" ] && prefix=
+            fi
             help="$help
 $prefix$usage"
         done
 
         set -- "${__DEFS[@]}"
-        local first=1
+        first=1
         while [ $# -gt 0 ]; do
             case "$1" in
             +) shift; continue;;