gnu: Add julia-documenter.

These four variables are added in the same commit to avoid a cyclic
dependency.

* gnu/packages/julia-xyz.scm (julia-documenter,
julia-documentermarkdown, julia-documentertools): New variables.
(julia-documenter-bootstrap): New hidden variable.

gnu/packages/julia-xyz.scm

@@ -22,13 +22,15 @@
 (define-module (gnu packages julia-xyz)
   #:use-module ((guix licenses) #:prefix license:)
   #:use-module (gnu packages)
+  #:use-module (guix utils)
   #:use-module (guix packages)
   #:use-module (guix git-download)
   #:use-module (guix build-system julia)
   #:use-module (gnu packages gcc)
   #:use-module (gnu packages julia-jll)
   #:use-module (gnu packages python)
-  #:use-module (gnu packages python-xyz))
+  #:use-module (gnu packages python-xyz)
+  #:use-module (gnu packages version-control))
 
 (define-public julia-abstractffts
   (package
@@ -992,6 +994,127 @@ cases that including them with the default Julia installation is not seen as
 valuable enough at this time.")
     (license license:expat)))
 
+;; By removing all the javascript and css downloads any HTML documentation
+;; produced by this package will not be very useful.
+(define-public julia-documenter
+  (package
+    (name "julia-documenter")
+    (version "0.27.7")
+    (source
+      (origin
+        (method git-fetch)
+        (uri (git-reference
+               (url "https://github.com/JuliaDocs/Documenter.jl")
+               (commit (string-append "v" version))))
+        (file-name (git-file-name name version))
+        (sha256
+         (base32 "00ai3c24i3fkn5plmavampcxm0ijhwk0v5cn9xwm7rvbjnnvaaam"))))
+    (build-system julia-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'patch-source
+           (lambda* (#:key inputs #:allow-other-keys)
+             (substitute* "src/Deps.jl"
+               (("pip install")
+                (string-append (assoc-ref inputs "python")
+                               "/bin/pip install")))
+             #t))
+         (add-after 'unpack 'remove-javascript-downloads
+           (lambda _
+             (substitute* "src/Writers/HTMLWriter.jl"
+               (("cdnjs.cloudflare.com") "example.com"))
+             ;; Removing the javascript downloads causes these tests fail.
+             (substitute* "test/examples/tests.jl"
+               ((".*Main\\.examples_html_doc.*") "")
+               ((".*Main\\.examples_html_mathjax3_doc.*") ""))
+             #t)))))
+    (propagated-inputs
+     `(("julia-ansicoloredprinters" ,julia-ansicoloredprinters)
+       ("julia-docstringextensions" ,julia-docstringextensions)
+       ("julia-iocapture" ,julia-iocapture)
+       ("julia-json" ,julia-json)))
+    (inputs
+     `(("python" ,python-wrapper)))
+    (native-inputs
+     `(("git" ,git-minimal)
+       ("julia-documentermarkdown" ,julia-documentermarkdown)
+       ("julia-documentertools" ,julia-documentertools)))
+    (home-page "https://juliadocs.github.io/Documenter.jl")
+    (synopsis "Documentation generator for Julia")
+    (description "This package provides a documentation generator for Julia.")
+    (license license:expat)))
+
+(define julia-documenter-bootstrap
+  (package
+    (inherit julia-documenter)
+    (name "julia-documenter-bootstrap")
+    (arguments
+     (substitute-keyword-arguments (package-arguments julia-documenter)
+       ((#:phases phases)
+        `(modify-phases ,phases
+           (delete 'patch-source)))
+       ;; Not all dependencies available in bootstrap version.
+       ((#:tests? _ #f) #f)))
+    (inputs `())
+    (native-inputs `())))
+
+(define-public julia-documentermarkdown
+  (package
+    (name "julia-documentermarkdown")
+    (version "0.2.2")
+    (source
+      (origin
+        (method git-fetch)
+        (uri (git-reference
+               (url "https://github.com/JuliaDocs/DocumenterMarkdown.jl")
+               (commit (string-append "v" version))))
+        (file-name (git-file-name name version))
+        (sha256
+         (base32 "0sx89hi5p2f8zi2rp5qrv06m270d90pxj5d2y5cxls1spax7wqx8"))))
+    (build-system julia-build-system)
+    (inputs
+     ;; We don't want to propagate the bootstrap version.
+     ;; Cycle with Documenter.jl in later versions.
+     `(("julia-documenter" ,julia-documenter-bootstrap)))
+    (home-page "https://github.com/JuliaDocs/DocumenterMarkdown.jl")
+    (synopsis "Documenter's Markdown")
+    (description "This package enables the Markdown / MkDocs backend of
+@code{Documenter.jl}.")
+    (license license:expat)))
+
+(define-public julia-documentertools
+  (package
+    (name "julia-documentertools")
+    (version "0.1.13")
+    (source
+      (origin
+        (method git-fetch)
+        (uri (git-reference
+               (url "https://github.com/JuliaDocs/DocumenterTools.jl")
+               (commit (string-append "v" version))))
+        (file-name (git-file-name name version))
+        (sha256
+         (base32 "05p57p8xlkn42m1lv9gq4hl96vp7hpj19d51p828ai1rbpcpi3a6"))))
+    (build-system julia-build-system)
+    (arguments
+     `(#:tests? #f))    ; Tests require network.
+    (inputs
+     ;; We don't want to propagate the bootstrap version.
+     ;; Cycle with Documenter.jl in later versions.
+     `(("julia-documenter" ,julia-documenter-bootstrap)))
+    (propagated-inputs
+     `(("julia-docstringextensions" ,julia-docstringextensions)
+       ("julia-gumbo" ,julia-gumbo)
+       ("julia-sass" ,julia-sass)))
+    (native-inputs
+     `(("julia-example" ,julia-example)))
+    (home-page "https://github.com/JuliaDocs/DocumenterTools.jl")
+    (synopsis "Extra tools for setting up Documenter.jl")
+    (description "This package contains utilities for setting up documentation
+generation with @code{Documenter.jl}.")
+    (license license:expat)))
+
 (define-public julia-diffresults
   (package
     (name "julia-diffresults")