make some language lists at snap build time

scripts/make-language-lists

@@ -0,0 +1,30 @@
+#!/usr/bin/python3
+
+import glob
+import gzip
+import os
+
+
+translations = set()
+for fname in glob.glob('po/*.po'):
+    translations.add(os.path.splitext(os.path.basename(fname))[0])
+
+print('found translations', translations)
+    
+console_langs = open('languagelist-console', 'w')
+ssh_langs = open('languagelist-ssh', 'w')
+data = gzip.open('/usr/share/localechooser/languagelist.data.gz', mode='rt')
+
+for line in data:
+    level, code, name, desc = line.strip().split(':')
+    if code not in translations:
+        continue
+    level = int(level)
+    new_line = "{}:{}\n".format(code, desc)
+    ssh_langs.write(new_line)
+    if level <= 2:
+        console_langs.write(new_line)
+
+console_langs.close()
+ssh_langs.close()
+data.close()

snapcraft.yaml

@@ -124,6 +124,15 @@ parts:
       font/subiquity.psf: subiquity.psf
     stage:
       - subiquity.psf
+  languagelists:
+    plugin: nil
+    build-packages:
+      - localechooser-data
+    override-build: |
+      scripts/make-language-lists
+    stage:
+      - languagelist-console
+      - languagelist-ssh
   probert:
     plugin: python
     build-packages: [python-setuptools, libnl-3-dev, libnl-genl-3-dev, libnl-route-3-dev]