build-system: Add 'texlive-build-system'.

* guix/build-system/texlive.scm: New file.
* guix/build/texlive-build-system.scm: New file.
* Makefile.am (MODULES): Add them.
* doc/guix.texi (Build Systems): Document it.
* gnu/packages/tex.scm (%texlive-tag, %texlive-revision): Remove variables.
(texlife-ref): Remove procedure.

1 files changed, 1 insertions, 13 deletions

diff --git a/gnu/packages/tex.scm b/gnu/packages/tex.scm
index 9c791ffa10..faf949862f 100644
--- a/gnu/packages/tex.scm
+++ b/gnu/packages/tex.scm
@@ -30,6 +30,7 @@
   #:use-module (guix build-system gnu)
   #:use-module (guix build-system perl)
   #:use-module (guix build-system trivial)
+  #:use-module (guix build-system texlive)
   #:use-module (guix utils)
   #:use-module (guix git-download)
   #:use-module (guix svn-download)
@@ -180,10 +181,6 @@ This package contains the binaries.")
    (license (license:fsf-free "https://www.tug.org/texlive/copying.html"))
    (home-page "https://www.tug.org/texlive/")))
 
-;; These variables specify the SVN tag and the matching SVN revision.
-(define %texlive-tag "texlive-2017.0")
-(define %texlive-revision 44445)
-
 (define-public texlive-dvips
   (package
     (name "texlive-dvips")
@@ -672,15 +669,6 @@ TeXbook, together with various supporting files (some also discussed in the
 book).")
     (license license:knuth)))
 
-(define (texlive-ref component id)
-  "Return a <svn-reference> object for the package ID, which is part of the
-given Texlive COMPONENT."
-  (svn-reference
-   (url (string-append "svn://www.tug.org/texlive/tags/"
-                       %texlive-tag "/Master/texmf-dist/"
-                       "source/" component "/" id))
-   (revision %texlive-revision)))
-
 (define-public texlive-latex-base
   (let ((texlive-dir
          (lambda (dir hash)