Convert code in bsd.port.mk for USE_GHOSTSCRIPT* to USES=ghostscript.

Add GHOSTSCRIPT_DEFAULT to bsd.default-versions.mk for easy version selection.
Arguments supported: <empty>, build, run, nox11 and agpl

PR:		201201 (exp-run)
Approved by:	portmgr (mat@)
Exp run by:	antione@ (previous patch)
Differential Revision:	https://reviews.freebsd.org/D2938

4 files changed, 109 insertions, 73 deletions

diff --git a/Mk/Uses/ghostscript.mk b/Mk/Uses/ghostscript.mk
new file mode 100644
index 000000000000..9271eb0d0134
--- /dev/null
+++ b/Mk/Uses/ghostscript.mk
@@ -0,0 +1,104 @@
+# $FreeBSD$
+#
+# Provide support for ghostscript ports.
+#
+# Feature:	ghostscript
+# Usage:	USES=ghostscript or USES=ghostscript:args
+# Valid ARGS:	<version>, build, run, nox11, agpl
+#
+# version 	The chooseable versions are 7, 8 and 9. If no version is
+#		specified version 9 is selected.
+#
+#		USES=ghostscript:7	# Use Ghostscript 7
+#		USES=ghostscript:run	# Use the set default Ghostscript as a run dependancy
+#		USES=ghostscript:8,build # Use ghostscript 8 as a build dependancy.
+#
+# nox11		Indicate that the Ghostscript nox11 port is required.
+# agpl		Indicate that the Ghostscript apgl port is required.
+# build		Indicates that Ghostscript is needed at build time and adds
+#		it as BUILD_DEPENDS.
+# run		Indicates that Ghostscript is needed at run time and adds
+#		it as RUN_DEPENDS.
+#
+# If build and run are omitted, Ghostscript will be added as BUILD_DEPENDS and
+# RUN_DEPENDS.
+#
+# MAINTAINER: ports@FreeBSD.org
+
+.if !defined(_INCLUDE_USES_GHOSTSCRIPT_MK)
+_INCLUDE_USES_GHOSTSCRIPT_MK=	yes
+
+# allowed versions
+_GS_VERSION=	7 8 9
+
+_GS_ARGS=		${ghostscript_ARGS}
+
+.if ${_GS_ARGS:N[789]:Nnox11:Nagpl:Nbuild:Nrun}
+IGNORE=		Unknown ghostscript argument ${_GS_ARGS}
+.endif
+
+# Determine version number of Ghostscript to use
+.include "${PORTSDIR}/Mk/bsd.default-versions.mk"
+
+.if ${_GS_VERSION:M${GHOSTSCRIPT_DEFAULT}} == ""
+IGNORE=		Invalid GHOSTSCRIPT_DEFAULT value: ${GHOSTSCRIPT_DEFAULT}, please select one of ${_GS_VERSION}
+.endif
+
+# Make sure that no dependency or some other environment variable
+# pollutes the build/run dependency detection
+.undef _GS_BUILD_DEP
+.undef _GS_RUN_DEP
+.if ${_GS_ARGS:Mbuild}
+_GS_BUILD_DEP=	yes
+.endif
+.if ${_GS_ARGS:Mrun}
+_GS_RUN_DEP=	yes
+.endif
+
+# The port does not specify a build or run dependency, assume both are
+# required.
+.if !defined(_GS_BUILD_DEP) && !defined(_GS_RUN_DEP)
+_GS_BUILD_DEP=	yes
+_GS_RUN_DEP=	yes
+.endif
+
+_GS_SELECTED=	${GHOSTSCRIPT_DEFAULT}
+.if ${_GS_ARGS:M9}
+_GS_SELECTED:=		9
+.elif ${_GS_ARGS:M8}
+_GS_SELECTED:=		8
+.elif ${_GS_ARGS:M7}
+_GS_SELECTED:=		7
+.endif
+
+.undef _GS_AGPL_SUFFIX
+.if ${_GS_ARGS:Magpl}
+. if ${_GS_SELECTED} == "9"
+_GS_AGPL_SUFFIX=	-agpl
+. else
+IGNORE=		Ghostscript-agpl is only available in version 9
+. endif
+.endif
+
+.undef _GS_NOX11_SUFFIX
+.if ${_GS_ARGS:Mnox11} || defined(WITHOUT_X11)
+_GS_NOX11_SUFFIX=	-nox11
+.endif
+
+.endif # _INCLUDE_USES_GHOSTSCRIPT_MK
+
+.if defined(_POSTMKINCLUDED) && !defined(_INCLUDE_USES_GHOSTSCRIPT_POST_MK)
+_INCLUDE_USES_GHOSTSCRIPT_POST_MK=   yes
+
+# dependencies
+_GS_PORT=	ghostscript${_GS_SELECTED}${_GS_AGPL_SUFFIX}${_GS_NOX11_SUFFIX}
+
+.if defined(_GS_BUILD_DEP)
+BUILD_DEPENDS+=	${_GS_PORT}>=0:${PORTSDIR}/print/${_GS_PORT}
+.endif
+.if defined(_GS_RUN_DEP)
+RUN_DEPENDS+=	${_GS_PORT}>=0:${PORTSDIR}/print/${_GS_PORT}
+.endif
+
+
+.endif
diff --git a/Mk/bsd.default-versions.mk b/Mk/bsd.default-versions.mk
index f1733d4556a4..3e6c85cbc280 100644
--- a/Mk/bsd.default-versions.mk
+++ b/Mk/bsd.default-versions.mk
@@ -32,6 +32,7 @@ PYTHON3_DEFAULT?=	3.4
 RUBY_DEFAULT?=		2.1
 TCLTK_DEFAULT?=		8.6
 FIREBIRD_DEFAULT?=	2.5
+GHOSTSCRIPT_DEFAULT?=	9
 
 # Version of lang/gcc.  Do not override!
 LANG_GCC_IS=		4.8
diff --git a/Mk/bsd.port.mk b/Mk/bsd.port.mk
index b855919d91a7..a3d3981df158 100644
--- a/Mk/bsd.port.mk
+++ b/Mk/bsd.port.mk
@@ -342,27 +342,6 @@ FreeBSD_MAINTAINER=	portmgr@FreeBSD.org
 # CXXFLAGS_${ARCH}
 #				 Append the cxxflags to CXXFLAGS only on the specified architecture
 ##
-# USE_GHOSTSCRIPT
-#				- If set, this port needs ghostscript to both
-#				  build and run.  If a number is specified,
-#				  the specified version will be used.
-#				  The valid value is '7', '8', or '9' in that case.
-# USE_GHOSTSCRIPT_BUILD
-#				- If set, this port needs ghostscript to build.
-# USE_GHOSTSCRIPT_RUN
-#				- If set, this port needs ghostscript to run.
-# GHOSTSCRIPT_PORT
-#				- The port that provides postscript functionality.
-#				  Some installations may wish to override the default
-#				  to specify a version without X11 and/or localized
-#				  versions for their nationality.
-#				  Default: print/ghostscript9
-# WITH_GHOSTSCRIPT_VER
-#				- If set, the specified version of ghostscript will be
-#				  used.  The valid value is "7", "8", or "9".  Note that
-#				  this is for users, not for port maintainers.  This
-#				  should not be used in Makefile.
-##
 # USE_GL		- A list of Mesa or GL related dependencies needed by the port.
 #				  Supported components are: egl, glesv2, glut, glu, glw, and gl.
 #				  If set to "yes", this is equivalent to "glu". Note that
@@ -1927,58 +1906,6 @@ CONFIGURE_ARGS+=--x-libraries=${LOCALBASE}/lib --x-includes=${LOCALBASE}/include
 .endif
 .endif
 
-# Set the default for the installation of Postscript(TM)-
-# compatible functionality.
-.if !defined(USE_GHOSTSCRIPT)
-.	if defined(USE_GHOSTSCRIPT_BUILD)
-_USE_GHOSTSCRIPT=	${USE_GHOSTSCRIPT_BUILD}
-.	elif defined(USE_GHOSTSCRIPT_RUN)
-_USE_GHOSTSCRIPT=	${USE_GHOSTSCRIPT_RUN}
-.	endif
-.else
-_USE_GHOSTSCRIPT=	${USE_GHOSTSCRIPT}
-.endif
-
-.if defined(WITH_GHOSTSCRIPT_VER) && !empty(WITH_GHOSTSCRIPT_VER:M[789])
-_USE_GHOSTSCRIPT_DEFAULT_VER=	${WITH_GHOSTSCRIPT_VER}
-.else
-_USE_GHOSTSCRIPT_DEFAULT_VER=	9
-.endif
-
-.if defined(_USE_GHOSTSCRIPT)
-.	if !defined(WITHOUT_X11)
-_USE_GHOSTSCRIPT_PKGNAME_SUFFIX=
-.	else
-_USE_GHOSTSCRIPT_PKGNAME_SUFFIX=-nox11
-.	endif
-.	if !empty(_USE_GHOSTSCRIPT:M[789])
-_USE_GHOSTSCRIPT_VER=${_USE_GHOSTSCRIPT:M[789]}
-.	else
-_USE_GHOSTSCRIPT_VER=${_USE_GHOSTSCRIPT_DEFAULT_VER}
-.	endif
-.else
-_USE_GHOSTSCRIPT_VER=${_USE_GHOSTSCRIPT_DEFAULT_VER}
-.endif
-
-# Sanity check
-.if defined(_USE_GHOSTSCRIPT) && defined(WITH_GHOSTSCRIPT_VER)
-.	if empty(WITH_GHOSTSCRIPT_VER:M[789])
-.		error You set an invalid value "${WITH_GHOSTSCRIPT_VER}" in WITH_GHOSTSCRIPT_VER.  Abort.
-.	elif ${_USE_GHOSTSCRIPT_VER} != ${WITH_GHOSTSCRIPT_VER}
-.		error You set WITH_GHOSTSCRIPT_VER as ${WITH_GHOSTSCRIPT_VER} but ${PKGNAME} requires print/ghostscript${_USE_GHOSTSCRIPT_VER}.  Abort.
-.	endif
-.endif
-
-GHOSTSCRIPT_PORT?=	print/ghostscript${_USE_GHOSTSCRIPT_VER}${_USE_GHOSTSCRIPT_PKGNAME_SUFFIX}
-
-# Set up the ghostscript dependencies.
-.if defined(USE_GHOSTSCRIPT) || defined(USE_GHOSTSCRIPT_BUILD)
-BUILD_DEPENDS+=	gs:${PORTSDIR}/${GHOSTSCRIPT_PORT}
-.endif
-.if defined(USE_GHOSTSCRIPT) || defined(USE_GHOSTSCRIPT_RUN)
-RUN_DEPENDS+=	gs:${PORTSDIR}/${GHOSTSCRIPT_PORT}
-.endif
-
 # Macro for doing in-place file editing using regexps
 REINPLACE_ARGS?=	-i.bak
 REINPLACE_CMD?=	${SED} ${REINPLACE_ARGS}
diff --git a/Mk/bsd.sanity.mk b/Mk/bsd.sanity.mk
index a540bf93a4d8..3040665aa62e 100644
--- a/Mk/bsd.sanity.mk
+++ b/Mk/bsd.sanity.mk
@@ -47,6 +47,10 @@ DEV_ERROR+=	"USE_KDELIBS_VER is unsupported"
 DEV_ERROR+=	"USE_QT_VER is unsupported"
 .endif
 
+.if defined(USE_GHOSTSCRIPT) || defined(USE_GHOSTSCRIPT_BUILD) || defined(USE_GHOSTSCRIPT_RUN)
+DEV_ERROR+=	"USE_GHOSTSCRIPT is unsupported, please use USES=ghostscript instead"
+.endif
+
 .if !empty(LIB_DEPENDS:M*/../*)
 DEV_ERROR+=	"LIB_DEPENDS contains unsupported relative path to dependency"
 .endif