commit: 94b98bb0d11bfda14193cdb9c01c4c10d6e6f7ba
Author: Kent Fredric <kentfredric <AT> gmail <DOT> com>
AuthorDate: Sun Jun 21 00:14:19 2015 +0000
Commit: Kent Fredric <kentfredric <AT> gmail <DOT> com>
CommitDate: Sun Jun 21 00:23:28 2015 +0000
URL: https://gitweb.gentoo.org/proj/perl-overlay.git/commit/?id=94b98bb0
[eclass] Add perl-version.eclass which can turn normalised forms into floats
eclass/perl-version.eclass | 91 ++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 91 insertions(+)
diff --git a/eclass/perl-version.eclass b/eclass/perl-version.eclass
new file mode 100644
index 0000000..97022e2
--- /dev/null
+++ b/eclass/perl-version.eclass
@@ -0,0 +1,91 @@
+# Copyright 1999-2015 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Header: $
+
+# @ECLASS: perl-versions.eclass
+# @MAINTAINER:
+# p...@gentoo.org
+# Kent Fredric <ken...@cpan.org>
+# @BLURB: Perl versioning functions
+# @DESCRIPTION:
+# The perl-version eclass contains an assortment of functions for
denormalizing versions
+# in order to streamline version bumps and minimise risk of accidental failure
to update
+# MODULE_VERSION and unify all the ways of turning arbitrary normalised
versions back into
+# a form used upstream.
+
+# expand-tail 5 => 005
+# expand-tail 5.5 => 005005
+perl-version-expand-tail() {
+ local tail=$1
+ if [ -z "${tail}" ]; then
+ echo '000';
+ return;
+ fi
+ # Tail with no segments
+ if [ "${tail%%.*}" = "${tail}" ]; then
+ printf "%03d" "$tail"
+ return;
+ fi
+ local head="${tail%%.*}"
+ local rest=$( perl-version-expand-tail "${tail#*.}" )
+ printf "%03d%s" $head $rest;
+ return;
+}
+
+# float 5.1 => 5.001
+# float 5.10 => 5.010
+# float 5.100 => 5.100
+# float 5.1.1 => 5.001001
+perl-version-float() {
+ local version=$1
+ local major=${version%%.*}
+ local tail=${version#*.}
+ if [ "$tail" = "$version" ]; then
+ tail=000;
+ else
+ tail=$( perl-version-expand-tail "${tail}" )
+ fi
+ printf "%s.%s" "$major" "$tail";
+ return;
+}
+
+# float_n 5.201.505.200 8 => 5.20150520
+perl-version-float_n() {
+ local version=$1
+ local mantissa=$2
+ local major=${version%%.*}
+ if [ "$mantissa" -lt 1 ]; then
+ printf "%s" $major;
+ return;
+ fi
+ local tail=${version#*.}
+ if [ "$tail" = "$version" ]; then
+ tail=000;
+ else
+ tail=$( perl-version-expand-tail "${tail}" )
+ fi
+ if [ "${#tail}" -lt $mantissa ]; then
+ local pad=$(( $mantissa - ${#tail} ));
+ printf "%s.%s%0${pad}d" "${major}" "${tail}" 0
+ return
+ fi
+ printf "%s.%s" "${major}" "${tail:0:$mantissa}"
+}
+
+# denormalize 5.201.505.200 float_n 8 => 5.20150520
+perl-version-denormalize() {
+ local version=$1;
+ local scheme=$2;
+ shift
+ shift
+ case "${scheme}" in
+ "float_n")
+ perl-version-float_n $version "$@"
+ return
+ ;;
+ *)
+ die "Unknown version scheme ${scheme}"
+ ;;
+ esac
+}
+
