scribble: add #:indirect option to defmodule

Also, fix up some command-line argument handling for `scribble`.

original commit: b8f6311e4b082cf7a5ce33f64d0dafeb9ffcfb36

pkgs/scribble-pkgs/scribble-doc/scribblings/scribble/manual.scrbl

@@ -537,6 +537,7 @@ corresponding @racketidfont{racket...} binding.}
                        #:no-declare
                        (code:line #:use-sources (src-module-path ...))
                        (code:line #:link-target? link-target?-expr)
+                       #:indirect
                        #:lang
                        #:reader
                        (code:line #:packages (pkg-expr ...))])]{
@@ -579,6 +580,12 @@ sub-parts). These link targets are referenced via
 @racket[racketmodname], which thus points to the enclosing section,
 rather than the individual @racket[module-path]s.
 
+Specifying @racket[#:indirect] normally makes sense only when
+@racket[#:link-target?] is specified with a true value. Specifying
+@racket[#:indirect] makes the module path that is displayed (and that
+normally refers to some other declaration of the module) use
+@racket[racketmodname] with @racket[#:indirect].
+
 If @racket[#:lang] is provided as an option, then the module name is
 shown after @hash-lang[] (instead of in a @racket[require] form) to
 indicate that the @racket[module-path]s are suitable for use by either

pkgs/scribble-pkgs/scribble-lib/scribble/html-render.rkt

@@ -1220,7 +1220,8 @@
                              (and ext? external-tag-path))
                          ;; Redirected to search:
                          (url->string*
-                          (let ([u (string->url external-tag-path)])
+                          (let ([u (string->url (or external-tag-path
+                                                    "http://doc.racket-lang.com/"))])
                             (struct-copy
                              url
                              u

pkgs/scribble-pkgs/scribble-lib/scribble/private/manual-mod.rkt

@@ -43,13 +43,6 @@
   (make-element (make-style #f (list (make-background-color-property "yellow"))) content))
 ;; ---------------------------------------------------------------------------------------------------
 
-(begin-for-syntax
- (define-splicing-syntax-class link-target?-kw
-   #:description "#:link-target? keyword"
-   (pattern (~seq #:link-target? expr))
-   (pattern (~seq)
-            #:with expr #'#t)))
-
 (define-syntax (defmodule stx)
   (syntax-parse stx
     [(_ (~or (~seq #:require-form req)
@@ -58,6 +51,7 @@
              name)
         (~or (~optional (~seq #:link-target? link-target-expr)
                         #:defaults ([link-target-expr #'#t]))
+             (~optional (~and #:indirect indirect))
              (~optional (~seq #:use-sources (pname ...)))
              (~optional (~seq #:module-paths (modpath ...)))
              (~optional (~seq #:packages (pkg ...)))
@@ -71,7 +65,10 @@
                                     #'(name2 ...))]
                    [(pname ...) (if (attribute pname)
                                     #'(pname ...)
-                                    #'())])
+                                    #'())]
+                   [(indirect-kw ...) (if (attribute indirect)
+                                          #'(#:indirect)
+                                          #'())])
        (with-syntax ([(decl-exp ...)
                       (if (attribute no-declare)
                           #'()
@@ -83,7 +80,7 @@
                             [(attribute readr) #''reader]
                             [else #'#f])]
                      [modpaths (if (attribute modpath)
-                                   #'(list (racketmodname modpath) ...)
+                                   #'(list (racketmodname modpath indirect-kw ...) ...)
                                    #'#f)]
                      [packages (if (attribute pkg)
                                    #'(list pkg ...)
@@ -100,7 +97,7 @@
                      [(show-name ...)
                       (if (attribute modpath)
                           #'(name2 ...)
-                          #'((racketmodname name2) ...))])
+                          #'((racketmodname name2 indirect-kw ...) ...))])
          #'(begin
              decl-exp ...
              (*defmodule (list show-name ...)

pkgs/scribble-pkgs/scribble-lib/scribble/run.rkt

@@ -13,8 +13,8 @@
 (define multi-html:render-mixin
   (lambda (%) (html:render-multi-mixin (html:render-mixin %))))
 
-(define current-render-mixin       (make-parameter text:render-mixin))
-(define current-html               (make-parameter #f))
+(define current-render-mixin       (make-parameter html:render-mixin))
+(define current-html               (make-parameter #t))
 (define current-dest-directory     (make-parameter #f))
 (define current-dest-name          (make-parameter #f))
 (define current-info-output-file   (make-parameter #f))
@@ -35,8 +35,6 @@
       (let ([v (read i)])
         (and (eof-object? (read i)) v)))))
 
-(current-render-mixin html:render-mixin)
-
 (define (run)
   (command-line
    #:program (short-program+command-name)
@@ -48,17 +46,22 @@
     (current-html #t)
     (current-render-mixin multi-html:render-mixin)]
    [("--latex") "generate LaTeX-format output"
+    (current-html #f)
     (current-render-mixin latex:render-mixin)]
    [("--pdf") "generate PDF-format output (with PDFLaTeX)"
+    (current-html #f)
     (current-render-mixin pdf:render-mixin)]
    [("--latex-section") n "generate LaTeX-format output for section depth <n>"
+    (current-html #f)
     (let ([v (string->number n)])
       (unless (exact-nonnegative-integer? v)
         (raise-user-error 'scribble (format "bad section depth: ~a" n)))
       (current-render-mixin (latex:make-render-part-mixin v)))]
    [("--text") "generate text-format output"
+    (current-html #f)
     (current-render-mixin text:render-mixin)]
    [("--markdown") "generate markdown-format output"
+    (current-html #f)
     (current-render-mixin markdown:render-mixin)]
    #:once-each
    [("--dest") dir "write output in <dir>"