Bug 1822869 - Install .deb langpacks in the same folder as the application r=gabriel

Differential Revision: https://phabricator.services.mozilla.com/D172812

browser/installer/linux/debian/install.in

@@ -1 +1 @@
-firefox/* usr/lib/${DEB_PKG_NAME}
+firefox/* ${DEB_PKG_INSTALL_PATH}

python/mozbuild/mozbuild/repackaging/deb.py

@@ -191,11 +191,13 @@ def _get_build_variables(
         if version.is_nightly
         else f"{version}~build{build_number}"
     )
+    remoting_name = application_ini_data["remoting_name"].lower()
 
     return {
         "DEB_DESCRIPTION": f"{application_ini_data['vendor']} {application_ini_data['display_name']}"
         f"{description_suffix}",
-        "DEB_PKG_NAME": f"{application_ini_data['remoting_name'].lower()}{package_name_suffix}",
+        "DEB_PKG_INSTALL_PATH": f"usr/lib/{remoting_name}",
+        "DEB_PKG_NAME": f"{remoting_name}{package_name_suffix}",
         "DEB_PKG_VERSION": deb_pkg_version,
         "DEB_CHANGELOG_DATE": format_datetime(application_ini_data["timestamp"]),
         "DEB_ARCH_NAME": _DEB_ARCH[arch],

python/mozbuild/mozbuild/test/repackaging/test_deb.py

@@ -81,6 +81,7 @@ def test_extract_application_ini_data_from_directory():
             "",
             {
                 "DEB_DESCRIPTION": "Mozilla Firefox",
+                "DEB_PKG_INSTALL_PATH": "usr/lib/firefox-nightly-try",
                 "DEB_PKG_NAME": "firefox-nightly-try",
                 "DEB_PKG_VERSION": "112.0a1~20230222000000",
             },
@@ -92,6 +93,7 @@ def test_extract_application_ini_data_from_directory():
             " - Language pack for Firefox Nightly for fr",
             {
                 "DEB_DESCRIPTION": "Mozilla Firefox - Language pack for Firefox Nightly for fr",
+                "DEB_PKG_INSTALL_PATH": "usr/lib/firefox-nightly-try",
                 "DEB_PKG_NAME": "firefox-nightly-try-l10n-fr",
                 "DEB_PKG_VERSION": "112.0a1~20230222000000",
             },
@@ -103,6 +105,7 @@ def test_extract_application_ini_data_from_directory():
             "",
             {
                 "DEB_DESCRIPTION": "Mozilla Firefox",
+                "DEB_PKG_INSTALL_PATH": "usr/lib/firefox-nightly-try",
                 "DEB_PKG_NAME": "firefox-nightly-try",
                 "DEB_PKG_VERSION": "112.0b1~build1",
             },
@@ -114,6 +117,7 @@ def test_extract_application_ini_data_from_directory():
             "",
             {
                 "DEB_DESCRIPTION": "Mozilla Firefox",
+                "DEB_PKG_INSTALL_PATH": "usr/lib/firefox-nightly-try",
                 "DEB_PKG_NAME": "firefox-nightly-try",
                 "DEB_PKG_VERSION": "112.0~build2",
             },