Merge pull request #779 from mwhudson/utf8-fallback

call setlocale() and set LC_CTYPE to C.UTF-8 if it fails

examples/autoinstall.yaml

@@ -3,7 +3,7 @@ early-commands:
   - echo a
   - sleep 1
   - echo a
-locale: en_UK.UTF-8
+locale: en_GB.UTF-8
 refresh-installer:
   update: yes
   channel: edge

scripts/runtests.sh

@@ -42,7 +42,7 @@ validate
 python3 scripts/check-yaml-fields.py .subiquity/subiquity-curtin-install.conf \
         debconf_selections.subiquity='"eek"'
 python3 scripts/check-yaml-fields.py .subiquity/var/lib/cloud/seed/nocloud-net/user-data \
-        locale='"en_UK.UTF-8"'
+        locale='"en_GB.UTF-8"'
 grep -q 'finish: subiquity/InstallProgress/install/postinstall/install_package1: SUCCESS: installing package1' \
      .subiquity/subiquity-debug.log
 grep -q 'finish: subiquity/InstallProgress/install/postinstall/install_package2: SUCCESS: installing package2' \

subiquity/cmd/tui.py

@@ -15,6 +15,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import argparse
+import locale
 import logging
 import os
 import fcntl
@@ -103,6 +104,13 @@ AUTO_ANSWERS_FILE = "/subiquity_config/answers.yaml"
 
 
 def main():
+    # Python 3.7+ does more or less this by default, but we need to
+    # work with the Python 3.6 in bionic.
+    try:
+        locale.setlocale(locale.LC_ALL, "")
+    except locale.Error:
+        locale.setlocale(locale.LC_CTYPE, "C.UTF-8")
+
     # Prefer utils from $SNAP, over system-wide
     snap = os.environ.get('SNAP')
     if snap: