provision: Add provision support for Ubuntu 19.04

This commit adds support for Ubuntu 19.04 in the development
environment.

docs/development/setup-advanced.md

@@ -11,7 +11,7 @@ Contents:
 If you'd like to install a Zulip development environment on a computer
 that's running one of:
 
-* Ubuntu 18.10 Cosmic, 18.04 Bionic, 16.04 Xenial
+* Ubuntu 19.04 Disco, 18.10 Cosmic, 18.04 Bionic, 16.04 Xenial
 * Debian 9 Stretch or 10 Buster
 * Centos 7 (beta)
 * Fedora 29 (beta)

scripts/lib/setup-apt-repo

@@ -45,7 +45,7 @@ deb http://ppa.launchpad.net/tabbott/zulip/ubuntu $release main
 deb-src http://ppa.launchpad.net/groonga/ppa/ubuntu $release main
 deb-src http://ppa.launchpad.net/tabbott/zulip/ubuntu $release main
 EOF
-elif [ "$release" = "cosmic" ]; then
+elif [ "$release" = "cosmic" ] || [ "$release" = "disco" ]; then
     # This case will eventually merge with the above, if/when we add
     # tsearch_extras packages to the Zulip PPA.
     apt-key add "$SCRIPTS_PATH"/setup/pgroonga-ppa.asc

tools/lib/provision.py

@@ -36,6 +36,7 @@ SUPPORTED_PLATFORMS = {
         "xenial",
         "bionic",
         "cosmic",
+        "disco",
     ],
     "Debian": [
         "stretch",
@@ -143,6 +144,7 @@ POSTGRES_VERSION_MAP = {
     "xenial": "9.5",
     "bionic": "10",
     "cosmic": "10",
+    "disco": "11",
     "centos7": "10",
     "fedora29": "10",
     "rhel7": "10",
@@ -187,7 +189,7 @@ COMMON_YUM_DEPENDENCIES = COMMON_DEPENDENCIES + [
 BUILD_TSEARCH_FROM_SOURCE = False
 BUILD_PGROONGA_FROM_SOURCE = False
 if vendor in ["Ubuntu", "Debian"]:
-    if codename == "cosmic":
+    if codename in ("cosmic", "disco"):
         # For platforms without a tsearch-extras package distributed
         # from our PPA, we need to build from source.
         BUILD_TSEARCH_FROM_SOURCE = True