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dnl #
dnl # DESCRIPTION:
dnl # Read meta data from the META file. When building from a git repository
dnl # the SPL_META_RELEASE field will be overwritten if there is an annotated
dnl # tag matching the form SPL_META_NAME-SPL_META_VERSION-*. This allows
dnl # for working builds to be uniquely identified using the git commit hash.
dnl #
dnl # The META file format is as follows:
dnl # ^[ ]*KEY:[ \t]+VALUE$
dnl #
dnl # In other words:
dnl # - KEY is separated from VALUE by a colon and one or more spaces/tabs.
dnl # - KEY and VALUE are case sensitive.
dnl # - Leading spaces are ignored.
dnl # - First match wins for duplicate keys.
dnl #
dnl # A line can be commented out by preceding it with a '#' (or technically
dnl # any non-space character since that will prevent the regex from
dnl # matching).
dnl #
dnl # WARNING:
dnl # Placing a colon followed by a space or tab (ie, ":[ \t]+") within the
dnl # VALUE will prematurely terminate the string since that sequence is
dnl # used as the awk field separator.
dnl #
dnl # KEYS:
dnl # The following META keys are recognized:
dnl # Name, Version, Release, Date, Author, LT_Current, LT_Revision, LT_Age
dnl #
dnl # Written by Chris Dunlap <cdunlap@llnl.gov>.
dnl # Modified by Brian Behlendorf <behlendorf1@llnl.gov>.
dnl #
AC_DEFUN([SPL_AC_META], [
AC_PROG_AWK
AC_MSG_CHECKING([metadata])
META="$srcdir/META"
_spl_ac_meta_type="none"
if test -f "$META"; then
_spl_ac_meta_type="META file"
SPL_META_NAME=_SPL_AC_META_GETVAL([(Name|Project|Package)]);
if test -n "$SPL_META_NAME"; then
AC_DEFINE_UNQUOTED([SPL_META_NAME], ["$SPL_META_NAME"],
[Define the project name.]
)
AC_SUBST([SPL_META_NAME])
fi
SPL_META_VERSION=_SPL_AC_META_GETVAL([Version]);
if test -n "$SPL_META_VERSION"; then
AC_DEFINE_UNQUOTED([SPL_META_VERSION], ["$SPL_META_VERSION"],
[Define the project version.]
)
AC_SUBST([SPL_META_VERSION])
fi
SPL_META_RELEASE=_SPL_AC_META_GETVAL([Release]);
if git rev-parse --git-dir > /dev/null 2>&1; then
_match="${SPL_META_NAME}-${SPL_META_VERSION}*"
_alias=$(git describe --match=${_match} 2>/dev/null)
_release=$(echo ${_alias}|cut -f3- -d'-'|sed 's/-/_/g')
if test -n "${_release}"; then
SPL_META_RELEASE=${_release}
_spl_ac_meta_type="git describe"
fi
fi
if test -n "$SPL_META_RELEASE"; then
AC_DEFINE_UNQUOTED([SPL_META_RELEASE], ["$SPL_META_RELEASE"],
[Define the project release.]
)
AC_SUBST([SPL_META_RELEASE])
RELEASE="$SPL_META_RELEASE"
AC_SUBST([RELEASE])
fi
if test -n "$SPL_META_NAME" -a -n "$SPL_META_VERSION"; then
SPL_META_ALIAS="$SPL_META_NAME-$SPL_META_VERSION"
test -n "$SPL_META_RELEASE" &&
SPL_META_ALIAS="$SPL_META_ALIAS-$SPL_META_RELEASE"
AC_DEFINE_UNQUOTED([SPL_META_ALIAS],
["$SPL_META_ALIAS"],
[Define the project alias string.]
)
AC_SUBST([SPL_META_ALIAS])
fi
SPL_META_DATA=_SPL_AC_META_GETVAL([Date]);
if test -n "$SPL_META_DATA"; then
AC_DEFINE_UNQUOTED([SPL_META_DATA], ["$SPL_META_DATA"],
[Define the project release date.]
)
AC_SUBST([SPL_META_DATA])
fi
SPL_META_AUTHOR=_SPL_AC_META_GETVAL([Author]);
if test -n "$SPL_META_AUTHOR"; then
AC_DEFINE_UNQUOTED([SPL_META_AUTHOR], ["$SPL_META_AUTHOR"],
[Define the project author.]
)
AC_SUBST([SPL_META_AUTHOR])
fi
m4_pattern_allow([^LT_(CURRENT|REVISION|AGE)$])
SPL_META_LT_CURRENT=_SPL_AC_META_GETVAL([LT_Current]);
SPL_META_LT_REVISION=_SPL_AC_META_GETVAL([LT_Revision]);
SPL_META_LT_AGE=_SPL_AC_META_GETVAL([LT_Age]);
if test -n "$SPL_META_LT_CURRENT" \
-o -n "$SPL_META_LT_REVISION" \
-o -n "$SPL_META_LT_AGE"; then
test -n "$SPL_META_LT_CURRENT" || SPL_META_LT_CURRENT="0"
test -n "$SPL_META_LT_REVISION" || SPL_META_LT_REVISION="0"
test -n "$SPL_META_LT_AGE" || SPL_META_LT_AGE="0"
AC_DEFINE_UNQUOTED([SPL_META_LT_CURRENT],
["$SPL_META_LT_CURRENT"],
[Define the libtool library 'current'
version information.]
)
AC_DEFINE_UNQUOTED([SPL_META_LT_REVISION],
["$SPL_META_LT_REVISION"],
[Define the libtool library 'revision'
version information.]
)
AC_DEFINE_UNQUOTED([SPL_META_LT_AGE], ["$SPL_META_LT_AGE"],
[Define the libtool library 'age'
version information.]
)
AC_SUBST([SPL_META_LT_CURRENT])
AC_SUBST([SPL_META_LT_REVISION])
AC_SUBST([SPL_META_LT_AGE])
fi
fi
AC_MSG_RESULT([$_spl_ac_meta_type])
]
)
dnl # _SPL_AC_META_GETVAL (KEY_NAME_OR_REGEX)
dnl #
dnl # Returns the META VALUE associated with the given KEY_NAME_OR_REGEX expr.
dnl #
dnl # Despite their resemblance to line noise,
dnl # the "@<:@" and "@:>@" constructs are quadrigraphs for "[" and "]".
dnl # <www.gnu.org/software/autoconf/manual/autoconf.html#Quadrigraphs>
dnl #
dnl # The "$[]1" and "$[]2" constructs prevent M4 parameter expansion
dnl # so a literal $1 and $2 will be passed to the resulting awk script,
dnl # whereas the "$1" will undergo M4 parameter expansion for the META key.
dnl #
AC_DEFUN([_SPL_AC_META_GETVAL],
[`$AWK -F ':@<:@ \t@:>@+' '$[]1 ~ /^ *$1$/ { print $[]2; exit }' $META`]dnl
)
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