package/erlang-rebar: new host package

rebar is used to compile Erlang packages.

We need  host variant so as to be able to provide it to Erlang packages
that do not bundle their own version, or bundle a broken version.

Since this is a host-only package, used only internally, we do not
provide a Kconfig option for it. Packages that need it will depend on
it.

Signed-off-by: Johan Oudinet <johan.oudinet@gmail.com>
[yann.morin.1998@free.fr: extract host-rebar to its own patch]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Arnout Vandecappelle <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/erlang-rebar/erlang-rebar.mk

@@ -0,0 +1,31 @@
+################################################################################
+#
+# erlang-rebar
+#
+################################################################################
+
+ERLANG_REBAR_VERSION = 2.5.1
+
+# Upstream publishes a release, but we can not use it as it is a release of
+# a generated rebar script, when we want the sources. So we have to use the
+# gihub helper in this case.
+ERLANG_REBAR_SITE = $(call github,rebar,rebar,$(ERLANG_REBAR_VERSION))
+
+# Although the file LICENSE state Apache-2.0, a lot (if not all) the files
+# in src/ bear the MIT licence.
+ERLANG_LICENSE = Apache-2.0, MIT
+ERLANG_LICENSE_FILES = LICENSE
+
+# We do not have a target variant, so just define the dependencies,
+# configure and build commands for the host variant.
+HOST_ERLANG_REBAR_DEPENDENCIES = host-erlang
+
+define HOST_ERLANG_REBAR_BUILD_CMDS
+	cd $(@D) && $(HOST_MAKE_ENV) $(MAKE)
+endef
+
+define HOST_ERLANG_REBAR_INSTALL_CMDS
+	$(INSTALL) -m 0755 -D $(@D)/rebar $(HOST_DIR)/usr/bin/rebar
+endef
+
+$(eval $(host-generic-package))