scribble: add --dest-base flag

Also add the option to `render' from `racket/render', and
document the existing `render%' initialization argument.

original commit: f9b4c6b2268440e9e74b414e6e0b1487981c70df

collects/scribble/render.rkt

@@ -14,6 +14,7 @@
           (#:render-mixin
            (class? . -> . class?)
            #:dest-dir (or/c #f path-string?)
+           #:helper-file-prefix (or/c #f string?)
            #:prefix-file (or/c #f path-string?)
            #:style-file (or/c #f path-string?)
            #:style-extra-files (listof path-string?)
@@ -30,6 +31,7 @@
                 names
                 #:render-mixin [render-mixin html:render-mixin]
                 #:dest-dir [dest-dir #f]
+                #:helper-file-prefix [helper-file-prefix #f]
                 #:prefix-file [prefix-file #f]
                 #:style-file [style-file #f]
                 #:style-extra-files [style-extra-files null]
@@ -47,7 +49,8 @@
                        [prefix-file prefix-file]
                        [style-file style-file]
                        [style-extra-files style-extra-files]
-                       [extra-files extra-files])])
+                       [extra-files extra-files]
+                       [helper-file-prefix helper-file-prefix])])
     (when redirect
       (send renderer set-external-tag-path redirect))
     (when redirect-main

collects/scribble/run.rkt

@@ -25,6 +25,7 @@
 (define current-redirect           (make-parameter #f))
 (define current-redirect-main      (make-parameter #f))
 (define current-quiet              (make-parameter #f))
+(define helper-file-prefix         (make-parameter #f))
 
 (define (read-one str)
   (let ([i (open-input-string str)])
@@ -58,6 +59,8 @@
     (current-dest-directory dir)]
    [("--dest-name") name "write output as <name>"
     (current-dest-name name)]
+   [("--dest-base") prefix "start support-file names with <prefix>"
+    (helper-file-prefix prefix)]
    #:multi
    [("++style") file "add given .css/.tex file after others"
     (current-style-extra-files (cons file (current-style-extra-files)))]
@@ -100,6 +103,9 @@
                  files))))
 
 (define (build-docs docs files)
+  (when (and (current-dest-name)
+             ((length files) . > . 1))
+    (raise-user-error 'scribble "cannot supply a destination name with multiple inputs"))
   (render docs
           (map (lambda (fn)
                  (let-values ([(base name dir?) (split-path fn)])
@@ -111,6 +117,7 @@
           #:style-file (current-style-file)
           #:style-extra-files (reverse (current-style-extra-files))
           #:extra-files (reverse (current-extra-files))
+          #:helper-file-prefix (helper-file-prefix)
           #:redirect (current-redirect)
           #:redirect-main (current-redirect-main)
           #:quiet? (current-quiet)

collects/scribblings/scribble/renderer.scrbl

@@ -43,6 +43,7 @@ function to render a document.
                  [names (listof path-string?)]
                  [#:render-mixin render-mixin (class? . -> . class?) @#,html:render-mixin]
                  [#:dest-dir dest-dir (or/c #f path-string?) #f]
+                 [#:helper-file-prefix helper-file-prefix (or/c #f string?) #f]
                  [#:prefix-file prefix-file (or/c #f path-string?) #f]
                  [#:style-file style-file (or/c #f path-string?) #f]
                  [#:style-extra-files style-extra-files (listof path-string?) #f]
@@ -68,9 +69,10 @@ The @racket[dest-dir] argument determines the output directory, which
 is created using @racket[make-directory*] if it is non-@racket[#f] and
 does not exist already.
 
-The @racket[prefix-file], @racket[style-file],
-@racket[extra-style-files], and @racket[extra-files] arguments are
-passed on to the @racket[render%] constructor.
+The @racket[helper-file-prefix], @racket[prefix-file],
+@racket[style-file], @racket[extra-style-files], and
+@racket[extra-files] arguments are passed on to the @racket[render%]
+constructor.
 
 The @racket[xrefs] argument provides extra cross-reference information
 to be used during the documents' @tech{resolve pass}. The
@@ -122,7 +124,8 @@ Represents a renderer.
                  [prefix-file (or/c path-string? #f) #f]
                  [style-file (or/c path-string? #f) #f]
                  [style-extra-files (listof path-string?) null]
-                 [extra-files (listof path-string?) null])]{
+                 [extra-files (listof path-string?) null]
+                 [helper-file-prefix (or/c string? #f) #f])]{
 
 Creates a renderer whose output will go to @racket[dest-dir]. For
 example, @racket[dest-dir] could name the directory containing the
@@ -148,7 +151,13 @@ styles in a formal-specific way; see @secref["config-style"] for more
 information.
 
 The @racket[extra-files] argument names files to be copied to the
-output location, such as image files or extra configuration files.}
+output location, such as image files or extra configuration files.
+
+The @racket[helper-file-prefix] argument specifies a string that is
+added as a prefix to the name of each support file that is generated
+or copied to the destination---not including files specified in
+@racket[extra-files], but including @racket[prefix-file],
+@racket[style-file], and @racket[style-extra-files].}
 
 
 @defmethod[(traverse [srcs (listof part?)]

collects/scribblings/scribble/running.scrbl

@@ -45,7 +45,8 @@ its file suffix:
 Use @DFlag{dest-name} to specify a @|fn| other than the default name,
 but only when a single source file is provided. Use the @DFlag{dest}
 flag to specify a destination directory (for any number of source
-files).
+files). Use @DFlag{dest-base} to add a prefix to the name of each
+support file that is generated or copied to the destination.
 
 After all flags, provide one or more document sources. When multiple
 documents are rendered at the same time, cross-reference information