[pitivi/1.0] bin: Unset LC_ALL when developing

[Alexandru Băluț <alexbalut src gnome org>]

commit 44d387c2ed3df4ace07dfd9f8508de818ee7acaa
Author: Alexandru Băluț <alexandru balut gmail com>
Date:   Sat Feb 17 15:54:34 2018 +0100

    bin: Unset LC_ALL when developing
    
    It's set when entering the sandbox to en_US.UTF-8, and this prevents the
    LANG env var to have effect.

 bin/pitivi.in   |    9 +++++++++
 docs/HACKING.md |   20 ++++++++++++++++++++
 2 files changed, 29 insertions(+), 0 deletions(-)
---
diff --git a/bin/pitivi.in b/bin/pitivi.in
index 2e3420a..2be8a83 100755
--- a/bin/pitivi.in
+++ b/bin/pitivi.in
@@ -94,6 +94,15 @@ def _add_pitivi_path():
             sys.path.append(path)
 
     # i18n
+    if _in_devel():
+        # LC_ALL is set to en_US.UTF-8 by flatpak builder which is used
+        # when developers run Pitivi in the development sandbox.
+        # We don't need to use LC_ALL when developing, so unset it
+        # to avoid being surprised that setting LANG does not work.
+        try:
+            del os.environ["LC_ALL"]
+        except KeyError:
+            pass
     localedir = os.path.join(DATADIR, "locale")
     try:
         gettext.bindtextdomain("pitivi", localedir)
diff --git a/docs/HACKING.md b/docs/HACKING.md
index 1c9f2f0..f1eaaab 100644
--- a/docs/HACKING.md
+++ b/docs/HACKING.md
@@ -162,3 +162,23 @@ You can then inspect the call tree profile with your preferred image viewer:
 ```
 $ xdg-open profile.svg
 ```
+
+
+## Switching locales
+
+To see how Pitivi looks in a different locale, use:
+
+```
+(ptv-flatpak) $ LANG=fr_FR.UTF-8 pitivi
+```
+
+Pay attention the translations in the sandbox are not automatically
+updated when you `git pull`. You can update them by updating your
+sandbox (`ptvenv --update`) or by reinstalling Pitivi in the sandbox:
+
+```
+(ptv-flatpak) $ binstall
+[...]
+Installing /.../pitivi-dev/pitivi/mesonbuild/po/de.gmo to /app/share/locale/de/LC_MESSAGES/pitivi.mo
+[...]
+```