Bug 1736950 - Fix mach show-log after bug 1696251. r=firefox-build-system-reviewers,mhentges

And disable logging on mach clobber like before.

Differential Revision: https://phabricator.services.mozilla.com/D129104

python/mach/mach/decorators.py

@@ -43,6 +43,8 @@ class _MachCommand(object):
         # For subcommands, the global order that the subcommand's declaration
         # was seen.
         "decl_order",
+        # Whether to disable automatic logging to last_log.json for the command.
+        "no_auto_log",
     )
 
     def __init__(
@@ -56,6 +58,7 @@ class _MachCommand(object):
         order=None,
         virtualenv_name=None,
         ok_if_tests_disabled=False,
+        no_auto_log=False,
     ):
         self.name = name
         self.subcommand = subcommand
@@ -77,6 +80,7 @@ class _MachCommand(object):
         self.metrics_path = None
         self.subcommand_handlers = {}
         self.decl_order = None
+        self.no_auto_log = no_auto_log
 
     def create_instance(self, context, virtualenv_name):
         metrics = None
@@ -86,7 +90,12 @@ class _MachCommand(object):
         # This ensures the resulting class is defined inside `mach` so that logging
         # works as expected, and has a meaningful name
         subclass = type(self.name, (MachCommandBase,), {})
-        return subclass(context, virtualenv_name=virtualenv_name, metrics=metrics)
+        return subclass(
+            context,
+            virtualenv_name=virtualenv_name,
+            metrics=metrics,
+            no_auto_log=self.no_auto_log,
+        )
 
     @property
     def parser(self):

python/mozbuild/mozbuild/base.py

@@ -896,7 +896,7 @@ class MachCommandBase(MozbuildObject):
     without having to change everything that inherits from it.
     """
 
-    def __init__(self, context, virtualenv_name=None, metrics=None):
+    def __init__(self, context, virtualenv_name=None, metrics=None, no_auto_log=False):
         # Attempt to discover topobjdir through environment detection, as it is
         # more reliable than mozconfig when cwd is inside an objdir.
         topsrcdir = context.topdir
@@ -970,7 +970,7 @@ class MachCommandBase(MozbuildObject):
             fileno = getattr(sys.stdout, "fileno", lambda: None)()
         except io.UnsupportedOperation:
             fileno = None
-        if fileno and os.isatty(fileno) and not getattr(self, "NO_AUTO_LOG", False):
+        if fileno and os.isatty(fileno) and not no_auto_log:
             self._ensure_state_subdir_exists(".")
             logfile = self._get_state_filename("last_log.json")
             try:

python/mozbuild/mozbuild/mach_commands.py

@@ -216,7 +216,6 @@ def doctor(command_context, fix=False, verbose=False):
     )
 
 
-NO_AUTO_LOG = True
 CLOBBER_CHOICES = {"objdir", "python", "gradle"}
 
 
@@ -224,6 +223,7 @@ CLOBBER_CHOICES = {"objdir", "python", "gradle"}
     "clobber",
     category="build",
     description="Clobber the tree (delete the object directory).",
+    no_auto_log=True,
 )
 @CommandArgument(
     "what",
@@ -332,10 +332,9 @@ def clobber(command_context, what, full=False):
     return ret
 
 
-NO_AUTO_LOG = True
-
-
-@Command("show-log", category="post-build", description="Display mach logs")
+@Command(
+    "show-log", category="post-build", description="Display mach logs", no_auto_log=True
+)
 @CommandArgument(
     "log_file",
     nargs="?",