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os_release: fix ISO parsing for 'Fedora-IoT' composes

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Also comment this better. We need to index from the end of the
string here, not the start, because going from the start breaks
when the compose shortname has a dash in it.

Signed-off-by: Adam Williamson <awilliam@redhat.com>
This commit is contained in:
Adam Williamson 2020-02-26 12:01:06 -08:00
parent 2c236ef16a
commit 1d4557126a
1 changed files with 15 additions and 8 deletions
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23
tests/os_release.pm
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@ -34,10 +34,19 @@ sub run {
# correct variables to compare the system data with.
# First, we know the basic stuff
my $id = get_var("DISTRI"); # Should be "fedora"
my $isovar = get_var("ISO"); # Takes the build string for canned variants.
# Split the ISO variable at "-" and read fields 4 (release version)
# and 5 (the build number).
my ($cannedver, $cannednum) = (split /-/, $isovar)[4, 5];
# extract expected version components from ISO name for canned variants,
# which have their os-release rewritten by rpm-ostree, see:
# https://github.com/projectatomic/rpm-ostree/blob/master/docs/manual/treefile.md
# we use the ISO name because rpm-ostree uses elements from the compose
# ID for nightlies, but from the label for candidate composes; BUILD
# always gives us the compose ID, but the ISO name contains the compose
# ID for nightlies but the label for candidate composes, so it works for
# our purposes here.
my $isovar = get_var("ISO");
# Split the ISO variable at "-" and read second-to-last (release
# number) and last (compose ID: date and respin, label: major and
# minor) fields.
my ($cannedver, $cannednum) = (split /-/, $isovar)[-2, -1];
# Get rid of the ".iso" part of the tag.
$cannednum =~ s/\.iso//g;
# Now, we merge the fields into one expression to create the correct canned tag
@ -77,10 +86,8 @@ sub run {
}
my $version = "$version_id ($varstr)";
# Version looks different when the build is canned (because
# rpm-ostree fiddles around with it, documented at
# https://github.com/projectatomic/rpm-ostree/blob/master/docs/manual/treefile.md )
# We need to form a different string here by using the above created cannedtag.
# for canned variants, we need to form a different string here by using
# the above created cannedtag. See earlier comment
if (get_var("CANNED")) {
$version = "$cannedtag ($varstr)";
}