Add new USES=fam that will replace USE_FAM=yes

The conversion is easy:
USE_FAM=yes -> USES=fam
USE_FAM=yes and WANT_FAM_SYSTEM=fam -> USES=fam:fam
USE_FAM=yes and WANT_FAM_SYSTEM=gamin -> USES=fam:gamin

Approved by:	portmgr (bapt)

1 files changed, 63 insertions, 0 deletions

diff --git a/Mk/Uses/fam.mk b/Mk/Uses/fam.mk
new file mode 100644
index 000000000000..852196e88c0e
--- /dev/null
+++ b/Mk/Uses/fam.mk
@@ -0,0 +1,63 @@
+# $FreeBSD$
+#
+# Handle dependency on File Alteration Monitor
+#
+# MAINTAINER: portmgr@FreeBSD.org
+#
+# Feature:	fam
+# Usage:	USES=fam or USES=fam:ARG
+# Valid ARG:	gamin, fam
+#
+# User-specified File Alteration Monitor wish:
+# Usage:	WITH_FAM_SYSTEM=ARG
+# Valid ARG:	gamin (default), fam
+#
+#
+.if !defined(_INCLUDE_USES_FAM_MK)
+_INCLUDE_USES_FAM_MK=	yes
+
+_fam_DEPENDS=	libfam.so.0:${PORTSDIR}/devel/fam
+_gamin_DEPENDS=	libfam.so.0:${PORTSDIR}/devel/gamin
+
+_FAM_SYSTEMS=	fam gamin
+_DEFAULT_FAM=	gamin
+
+.if exists(${LOCALBASE}/libexec/gam_server)
+_HAVE_FAM=	gamin
+.elif exists(${LOCALBASE}/bin/fam)
+_HAVE_FAM=	fam
+.endif
+
+# Sanity checks
+.if defined(WITH_FAM_SYSTEM) && defined(_HAVE_FAM) && ${_HAVE_FAM} != ${WITH_FAM_SYSTEM}
+IGNORE=	FAM mismatch: ${_HAVE_FAM} is installed, but ${WITH_FAM_SYSTEM} desired
+.endif
+
+.if defined(fam_ARGS)
+.for _fam_ARGS in ${fam_ARGS}
+.  if ! ${_FAM_SYSTEMS:M${_fam_ARGS}}
+IGNORE=	Incorrect 'USES+= fam:${fam_ARGS}' usage: argument [${_fam_ARGS}] is not recognized
+.  endif
+.endfor
+.  if defined(_HAVE_FAM) && ${_HAVE_FAM} != ${fam_ARGS}
+IGNORE=	FAM mismatch: port wants to use ${fam_ARGS} while you have ${_HAVE_FAM}
+.  endif
+.  if defined(WITH_FAM_SYSTEM) && ${WITH_FAM_SYSTEM} != ${fam_ARGS}
+IGNORE=	FAM mismatch: port wants to use ${fam_ARGS} while you wish to use ${WITH_FAM_SYSTEM}
+.  endif
+.endif
+
+# Proceed
+.if defined(fam_ARGS)
+_USE_FAM=	${fam_ARGS}
+.elif defined(_HAVE_FAM)
+_USE_FAM=	${_HAVE_FAM}
+.elif defined(WITH_FAM_SYSTEM)
+_USE_FAM=	${WITH_FAM_SYSTEM}
+.else
+_USE_FAM=	${_DEFAULT_FAM}
+.endif
+
+LIB_DEPENDS+=	${_${_USE_FAM}_DEPENDS}
+
+.endif