[PATCH 09/10] gnu: Add ocaml-js-build-tools.

[Julien Lepiller <julien@lepiller.eu>]

* gnu/packages/ocaml.scm (ocaml-js-build-tools): New variable.
* gnu/packages/patches/ocaml-janestreet-fix-libdir.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
---
 gnu/local.mk                                       |  1 +
 gnu/packages/ocaml.scm                             | 50 ++++++++++++++++++++++
 .../patches/ocaml-janestreet-fix-libdir.patch      | 39 +++++++++++++++++
 3 files changed, 90 insertions(+)
 create mode 100644 gnu/packages/patches/ocaml-janestreet-fix-libdir.patch

diff --git a/gnu/local.mk b/gnu/local.mk
index 2e3548342..8555e403f 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -775,6 +775,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/ocaml-CVE-2015-8869.patch		\
   %D%/packages/patches/ocaml-Add-a-.file-directive.patch	\
   %D%/packages/patches/ocaml-findlib-make-install.patch	\
+  %D%/packages/patches/ocaml-janestreet-fix-libdir.patch \
   %D%/packages/patches/omake-fix-non-determinism.patch	\
   %D%/packages/patches/ola-readdir-r.patch			\
   %D%/packages/patches/openexr-missing-samples.patch		\
diff --git a/gnu/packages/ocaml.scm b/gnu/packages/ocaml.scm
index ba0f5cd4c..9b323975f 100644
--- a/gnu/packages/ocaml.scm
+++ b/gnu/packages/ocaml.scm
@@ -66,6 +66,35 @@
                  (number->string file-number) "/" name "-" version
                  ".tar.gz"))
 
+;; Janestreet packages are found in a similar way and all need the same patch
+(define (janestreet-origin name version hash)
+  (origin (method url-fetch)
+          (uri (string-append "https://ocaml.janestreet.com/ocaml-core/"
+                              (version-major+minor version) "/files/"
+                              name "-" version ".tar.gz"))
+          (sha256 (base32 hash))
+          (patches (search-patches "ocaml-janestreet-fix-libdir.patch"))
+          (modules '((guix build utils)))
+          (snippet `(substitute* "install.ml"
+                                 (((string-append "lib/" ,name))
+                                  (string-append "lib/ocaml/site-lib/" ,name))))))
+
+;; They also require almost the same set of arguments
+(define janestreet-arguments
+ `(#:use-make? #t
+   #:make-flags
+   (list (string-append "CONFIGUREFLAGS=--prefix "
+                        (assoc-ref %outputs "out")
+                        " --enable-tests")
+         (string-append "LIBDIR="
+                        (assoc-ref %outputs "out")
+                        "/lib/ocaml/site-lib")
+         ;; for ocaml-bin-prot, otherwise ignored
+         (string-append "OCAML_TOPLEVEL_PATH="
+                        (assoc-ref %build-inputs "findlib")
+                        "/lib/ocaml/site-lib"))
+   #:phases (modify-phases %standard-phases (delete 'configure))))
+
 (define-public ocaml
   (package
     (name "ocaml")
@@ -1942,3 +1971,24 @@ file (POSIX like) and filename.")
 system in your OCaml projects.  It helps to create standard entry points in your
 build system and allows external tools to analyse your project easily.")
     (license license:lgpl2.1))) ; with ocaml static compilation exception
+
+(define-public ocaml-js-build-tools
+  (package
+    (name "ocaml-js-build-tools")
+    (version "113.33.06")
+    (source (janestreet-origin "js-build-tools" version
+              "0r8z4fz8iy5y6hkdlkpwf6rk4qigcr3dzyv35585xgg2ahf12zy6"))
+    (native-inputs
+     `(("oasis" ,ocaml-oasis)
+       ("opam" ,opam)))
+    (build-system ocaml-build-system)
+    (arguments janestreet-arguments)
+    (home-page "https://github.com/janestreet/js-build-tools")
+    (synopsis "Collection of tools to help building Jane Street Packages")
+    (description "This packages contains tools to help building Jane Street
+Packages, but can be used for other purposes.  It contains:
+@enumerate
+@item an oasis2opam-install tool to produce a .install file from the oasis build log
+@item an js_build_tools ocamlbuild plugin with various goodies
+@end enumerate")
+    (license license:asl2.0)))
diff --git a/gnu/packages/patches/ocaml-janestreet-fix-libdir.patch b/gnu/packages/patches/ocaml-janestreet-fix-libdir.patch
new file mode 100644
index 000000000..4ba2a7510
--- /dev/null
+++ b/gnu/packages/patches/ocaml-janestreet-fix-libdir.patch
@@ -0,0 +1,39 @@
+This patch adds a --libdir option to opam-installer so it installs the plugin
+in the specified directory rather than in the default one (ocaml's directory in
+the store, which is forbidden).
+diff -aur package.pristine/Makefile package.new/Makefile
+--- package.pristine/Makefile	2016-02-06 01:55:14.650150309 +0100
++++ package.new/Makefile	2016-02-06 01:57:56.012174364 +0100
+@@ -29,26 +29,26 @@
+ 	ocaml -I js-utils js-utils/gen_install.ml
+
+ install: $(NAME).install
+-	opam-installer -i --prefix $(PREFIX) $(NAME).install
++	opam-installer -i --prefix $(PREFIX) --libdir $(LIBDIR) $(NAME).install
+
+ uninstall: $(NAME).install
+-	opam-installer -u --prefix $(PREFIX) $(NAME).install
++	opam-installer -u --prefix $(PREFIX) --libdir $(LIBDIR) $(NAME).install
+
+ reinstall: $(NAME).install
+-	opam-installer -u --prefix $(PREFIX) $(NAME).install &> /dev/null || true
+-	opam-installer -i --prefix $(PREFIX) $(NAME).install
++	opam-installer -u --prefix $(PREFIX) --libdir $(LIBDIR) $(NAME).install &> /dev/null || true
++	opam-installer -i --prefix $(PREFIX) --libdir $(LIBDIR) $(NAME).install
+
+ bin.tar.gz: $(NAME).install
+ 	rm -rf _install
+ 	mkdir _install
+-	opam-installer -i --prefix _install $(NAME).install
++	opam-installer -i --prefix _install --libdir $(LIBDIR) $(NAME).install
+ 	tar czf bin.tar.gz -C _install .
+ 	rm -rf _install
+
+ bin.lzo: $(NAME).install
+ 	rm -rf _install
+ 	mkdir _install
+-	opam-installer -i --prefix _install $(NAME).install
++	opam-installer -i --prefix _install --libdir $(LIBDIR) $(NAME).install
+ 	cd _install && lzop -1 -P -o ../bin.lzo `find . -type f`
+ 	rm -rf _install
+
-- 
2.11.0