Bug 2044781 - Only install awk during bootstrap when it is missing. r=firefox-build-system-reviewers,ahochheiden

The openSUSE bootstrapper unconditionally requested the awk capability, but the
Tumbleweed base image already provides it through busybox-gawk. That made zypper
try to swap in the canonical gawk, hit a package conflict, and abort the
non-interactive install. Only add awk to the requested packages when it is not
already available.

Differential Revision: https://phabricator.services.mozilla.com/D310220

Author: rvandermeulen

python/mozboot/mozboot/opensuse.py

@@ -2,6 +2,8 @@
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
+from mozfile import which
+
 from mozboot.base import MERCURIAL_INSTALL_PROMPT, BaseBootstrapper
 from mozboot.linux_common import LinuxBootstrapper
 
@@ -16,8 +18,9 @@ def __init__(self, version, dist_id, **kwargs):
     def install_packages(self, packages):
         # watchman is not available
         packages = [p for p in packages if p != "watchman"]
-        # awk might be missing
-        packages += ["awk"]
+        # awk may already be pulled in transitively; only request it when missing.
+        if not which("awk"):
+            packages += ["awk"]
         self.zypper_install(*packages)
 
     def _update_package_manager(self):