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kaios: Put version numbers in manifest files

This only happens if something edits manifest.pl to provide a version
number, but Buildscr can do that.  KaiOS manifests are documented as
requiring dotted-decimal version numbers.  In fact, the restrictions are
much stricter than that, and unacceptable version numbers can break the
KaiStore developer portal. YY.MM.DD version numbers seem to be
acceptable.

--- a/kaios/manifest.pl

+++ b/kaios/manifest.pl

@@ -9,6 +9,9 @@

     die "usage: manifest.pl <name> <displayname> <description> <objective>";

 my ($name, $displayname, $description, $objective) = @ARGV;

+# This can be overridden by the build script.

+my $version = "Unidentified build";

+

 # Limits from

 # https://developer.kaiostech.com/docs/getting-started/main-concepts/manifest

 length($displayname) <= 20 or die "Name too long: $displayname";

@@ -17,6 +20,18 @@

 # https://developer.kaiostech.com/docs/distribution/submission-guideline

 length($objective) <= 220 or die "Description too long: $objective";

+my $decvers;

+if ($version =~ /^20(\d\d)(\d\d)(\d\d)\./) {

+    # Fabricate a dotted-decimal version number as required by KaiOS.

+    # The precise requirements are unclear and violating them leads to

+    # messes in the KaiStore that can only be resolved by Developer

+    # Support.  Specifically, uploading a bad version number as the

+    # first upload of an app can make it impossible to upload a new

+    # version.  I hope that three components of two digits each will

+    # be acceptable.

+    $decvers = join('.', $1+0, $2+0, $3+0);

+}

+

 print encode_json({

     name => $displayname,

     subtitle => $description,

@@ -31,6 +46,9 @@

         url => "https://bjh21.me.uk",

     },

     default_locale => "en-GB",

+    locales => [ ],

     categories => ["games"],

+    type => "web",

     cursor => JSON::PP::false,

+    $decvers ? (version => $decvers) : (),

 })