diff options
Diffstat (limited to 'config/zfs-meta.m4')
| -rw-r--r-- | config/zfs-meta.m4 | 87 |
1 files changed, 56 insertions, 31 deletions
diff --git a/config/zfs-meta.m4 b/config/zfs-meta.m4 index 2deda715d..03a15db36 100644 --- a/config/zfs-meta.m4 +++ b/config/zfs-meta.m4 @@ -1,14 +1,35 @@ -############################################################################### -# Written by Chris Dunlap <[email protected]>. -# Modified by Brian Behlendorf <[email protected]>. -############################################################################### -# ZFS_AC_META: Read metadata from the META file. When building from a -# git repository the ZFS_META_RELEASE field will be overwritten if there -# is an annotated tag matching the form ZFS_META_NAME-ZFS_META_VERSION-*. -# This allows for working builds to be uniquely identified using the git -# commit hash. -############################################################################### - +dnl # +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 # 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 <[email protected]>. +dnl # Modified by Brian Behlendorf <[email protected]>. +dnl # AC_DEFUN([ZFS_AC_META], [ AH_BOTTOM([ @@ -21,6 +42,7 @@ AC_DEFUN([ZFS_AC_META], [ #undef STDC_HEADERS #undef VERSION]) + AC_PROG_AWK AC_MSG_CHECKING([metadata]) META="$srcdir/META" @@ -28,7 +50,7 @@ AC_DEFUN([ZFS_AC_META], [ if test -f "$META"; then _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.] @@ -36,7 +58,7 @@ AC_DEFUN([ZFS_AC_META], [ 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.] @@ -44,7 +66,7 @@ AC_DEFUN([ZFS_AC_META], [ AC_SUBST([ZFS_META_VERSION]) fi - ZFS_META_RELEASE=_ZFS_AC_META_GETVAL([RELEASE]); + ZFS_META_RELEASE=_ZFS_AC_META_GETVAL([Release]); if 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) @@ -65,7 +87,7 @@ AC_DEFUN([ZFS_AC_META], [ AC_SUBST([RELEASE]) fi - ZFS_META_LICENSE=_ZFS_AC_META_GETVAL([LICENSE]); + 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.] @@ -84,7 +106,7 @@ AC_DEFUN([ZFS_AC_META], [ 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.] @@ -92,7 +114,7 @@ AC_DEFUN([ZFS_AC_META], [ 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.] @@ -101,9 +123,9 @@ AC_DEFUN([ZFS_AC_META], [ 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 @@ -134,15 +156,18 @@ AC_DEFUN([ZFS_AC_META], [ ] ) -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 ) |