cpan-base.bbclass: Move PERLVERSION and get_perl_version to a new file

It is possible for non-CPAN recipes to contain perl modules.  These perl
modules must reside in the versioned perl library directory in order to
work in normal circumstances..  Export this logic to a separate class so
that it can be reused without the rest of the cpan logic.

Without this, dpkg will not export its perl code to the correct location
and will not be found by utilities that expect to use it.

Signed-off-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 24 insertions, 0 deletions

diff --git a/meta/classes/perl-version.bbclass b/meta/classes/perl-version.bbclass
new file mode 100644
index 0000000000..fafe68a775
--- /dev/null
+++ b/meta/classes/perl-version.bbclass
@@ -0,0 +1,24 @@
+PERL_OWN_DIR = "${@["", "/perl-native"][(bb.data.inherits_class('native', d))]}"
+
+# Determine the staged version of perl from the perl configuration file
+# Assign vardepvalue, because otherwise signature is changed before and after
+# perl is built (from None to real version in config.sh).
+get_perl_version[vardepvalue] = "${PERL_OWN_DIR}"
+def get_perl_version(d):
+    import re
+    cfg = d.expand('${STAGING_LIBDIR}${PERL_OWN_DIR}/perl/config.sh')
+    try:
+        f = open(cfg, 'r')
+    except IOError:
+        return None
+    l = f.readlines();
+    f.close();
+    r = re.compile("^version='(\d*\.\d*\.\d*)'")
+    for s in l:
+        m = r.match(s)
+        if m:
+            return m.group(1)
+    return None
+
+PERLVERSION := "${@get_perl_version(d)}"
+PERLVERSION[vardepvalue] = ""