dnl #
-dnl # ZFS_AC_META
-dnl # Read metadata from the META file.
+dnl # DESCRIPTION:
+dnl # Read meta data from the META file. When building from a git repository
+dnl # the ZFS_META_RELEASE field will be overwritten if there is an annotated
+dnl # tag matching the form ZFS_META_NAME-ZFS_META_VERSION-*. This allows
+dnl # for working builds to be uniquely identified using the git commit hash.
dnl #
-dnl # AUTHOR:
-dnl # Chris Dunlap <cdunlap@llnl.gov>
+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([ZFS_AC_META], [
+
+ AH_BOTTOM([
+#undef PACKAGE
+#undef PACKAGE_BUGREPORT
+#undef PACKAGE_NAME
+#undef PACKAGE_STRING
+#undef PACKAGE_TARNAME
+#undef PACKAGE_VERSION
+#undef STDC_HEADERS
+#undef VERSION])
+
+ AC_PROG_AWK
AC_MSG_CHECKING([metadata])
META="$srcdir/META"
- _zfs_ac_meta_got_file=no
+ _zfs_ac_meta_type="none"
if test -f "$META"; then
- _zfs_ac_meta_got_file=yes
+ _zfs_ac_meta_type="META file"
- ZFS_META_NAME=_ZFS_AC_META_GETVAL([(?:NAME|PROJECT|PACKAGE)]);
+ ZFS_META_NAME=_ZFS_AC_META_GETVAL([(Name|Project|Package)]);
if test -n "$ZFS_META_NAME"; then
AC_DEFINE_UNQUOTED([ZFS_META_NAME], ["$ZFS_META_NAME"],
[Define the project name.]
AC_SUBST([ZFS_META_NAME])
fi
- ZFS_META_VERSION=_ZFS_AC_META_GETVAL([VERSION]);
+ ZFS_META_VERSION=_ZFS_AC_META_GETVAL([Version]);
if test -n "$ZFS_META_VERSION"; then
- AC_DEFINE_UNQUOTED([ZFS_META_VERSION], ["$ZFS_META_VERSION"],
- [Define the project version.]
- )
+ AC_DEFINE_UNQUOTED([ZFS_META_VERSION],
+ ["$ZFS_META_VERSION"],
+ [Define the project version.])
+ AC_DEFINE_UNQUOTED([SPL_META_VERSION],
+ [ZFS_META_VERSION],
+ [Defined for legacy compatibility.])
AC_SUBST([ZFS_META_VERSION])
fi
- ZFS_META_RELEASE=_ZFS_AC_META_GETVAL([RELEASE]);
+ ZFS_META_RELEASE=_ZFS_AC_META_GETVAL([Release]);
+ if test ! -f ".nogitrelease" && git rev-parse --git-dir > /dev/null 2>&1; then
+ _match="${ZFS_META_NAME}-${ZFS_META_VERSION}"
+ _alias=$(git describe --match=${_match} 2>/dev/null)
+ _release=$(echo ${_alias}|cut -f3- -d'-'|sed 's/-/_/g')
+ if test -n "${_release}"; then
+ ZFS_META_RELEASE=${_release}
+ _zfs_ac_meta_type="git describe"
+ else
+ _match="${ZFS_META_NAME}-${ZFS_META_VERSION}-${ZFS_META_RELEASE}"
+ _alias=$(git describe --match=${_match} 2>/dev/null)
+ _release=$(echo ${_alias}|cut -f3- -d'-'|sed 's/-/_/g')
+ if test -n "${_release}"; then
+ ZFS_META_RELEASE=${_release}
+ _zfs_ac_meta_type="git describe"
+ fi
+ fi
+ fi
+
if test -n "$ZFS_META_RELEASE"; then
- AC_DEFINE_UNQUOTED([ZFS_META_RELEASE], ["$ZFS_META_RELEASE"],
- [Define the project release.]
- )
+ AC_DEFINE_UNQUOTED([ZFS_META_RELEASE],
+ ["$ZFS_META_RELEASE"],
+ [Define the project release.])
+ AC_DEFINE_UNQUOTED([SPL_META_RELEASE],
+ [ZFS_META_RELEASE],
+ [Defined for legacy compatibility.])
AC_SUBST([ZFS_META_RELEASE])
+
+ RELEASE="$ZFS_META_RELEASE"
+ AC_SUBST([RELEASE])
+ fi
+
+ ZFS_META_LICENSE=_ZFS_AC_META_GETVAL([License]);
+ if test -n "$ZFS_META_LICENSE"; then
+ AC_DEFINE_UNQUOTED([ZFS_META_LICENSE], ["$ZFS_META_LICENSE"],
+ [Define the project license.]
+ )
+ AC_SUBST([ZFS_META_LICENSE])
fi
if test -n "$ZFS_META_NAME" -a -n "$ZFS_META_VERSION"; then
test -n "$ZFS_META_RELEASE" &&
ZFS_META_ALIAS="$ZFS_META_ALIAS-$ZFS_META_RELEASE"
AC_DEFINE_UNQUOTED([ZFS_META_ALIAS],
- ["$ZFS_META_ALIAS"],
- [Define the project alias string.]
- )
+ ["$ZFS_META_ALIAS"],
+ [Define the project alias string.])
+ AC_DEFINE_UNQUOTED([SPL_META_ALIAS],
+ [ZFS_META_ALIAS],
+ [Defined for legacy compatibility.])
AC_SUBST([ZFS_META_ALIAS])
fi
- ZFS_META_DATA=_ZFS_AC_META_GETVAL([DATE]);
+ ZFS_META_DATA=_ZFS_AC_META_GETVAL([Date]);
if test -n "$ZFS_META_DATA"; then
AC_DEFINE_UNQUOTED([ZFS_META_DATA], ["$ZFS_META_DATA"],
[Define the project release date.]
AC_SUBST([ZFS_META_DATA])
fi
- ZFS_META_AUTHOR=_ZFS_AC_META_GETVAL([AUTHOR]);
+ ZFS_META_AUTHOR=_ZFS_AC_META_GETVAL([Author]);
if test -n "$ZFS_META_AUTHOR"; then
AC_DEFINE_UNQUOTED([ZFS_META_AUTHOR], ["$ZFS_META_AUTHOR"],
[Define the project author.]
fi
m4_pattern_allow([^LT_(CURRENT|REVISION|AGE)$])
- ZFS_META_LT_CURRENT=_ZFS_AC_META_GETVAL([LT_CURRENT]);
- ZFS_META_LT_REVISION=_ZFS_AC_META_GETVAL([LT_REVISION]);
- ZFS_META_LT_AGE=_ZFS_AC_META_GETVAL([LT_AGE]);
+ ZFS_META_LT_CURRENT=_ZFS_AC_META_GETVAL([LT_Current]);
+ ZFS_META_LT_REVISION=_ZFS_AC_META_GETVAL([LT_Revision]);
+ ZFS_META_LT_AGE=_ZFS_AC_META_GETVAL([LT_Age]);
if test -n "$ZFS_META_LT_CURRENT" \
-o -n "$ZFS_META_LT_REVISION" \
-o -n "$ZFS_META_LT_AGE"; then
fi
fi
- AC_MSG_RESULT([$_zfs_ac_meta_got_file])
+ AC_MSG_RESULT([$_zfs_ac_meta_type])
]
)
-AC_DEFUN([_ZFS_AC_META_GETVAL],
- [`perl -n\
- -e "BEGIN { \\$key=shift @ARGV; }"\
- -e "next unless s/^\s*\\$key@<:@:=@:>@//i;"\
- -e "s/^((?:@<:@^'\"#@:>@*(?:(@<:@'\"@:>@)@<:@^\2@:>@*\2)*)*)#.*/\\@S|@1/;"\
- -e "s/^\s+//;"\
- -e "s/\s+$//;"\
- -e "s/^(@<:@'\"@:>@)(.*)\1/\\@S|@2/;"\
- -e "\\$val=\\$_;"\
- -e "END { print \\$val if defined \\$val; }"\
- '$1' $META`]dnl
+dnl # _ZFS_AC_META_GETVAL (KEY_NAME_OR_REGEX)
+dnl #
+dnl # Returns the META VALUE associated with the given KEY_NAME_OR_REGEX expr.
+dnl #
+dnl # Despite their resemblance to line noise,
+dnl # the "@<:@" and "@:>@" constructs are quadrigraphs for "[" and "]".
+dnl # <www.gnu.org/software/autoconf/manual/autoconf.html#Quadrigraphs>
+dnl #
+dnl # The "$[]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 "$1" will undergo M4 parameter expansion for the META key.
+dnl #
+AC_DEFUN([_ZFS_AC_META_GETVAL],
+ [`$AWK -F ':@<:@ \t@:>@+' '$[]1 ~ /^ *$1$/ { print $[]2; exit }' $META`]dnl
)