Bug 1671424 - Move configure execution from client.mk to `mach configure`. r=firefox-build-system-reviewers,rstewart

`mach configure` currently runs the equivalent to `make -f client.mk`.
This is history, and essentially does the following:
- Create `configure` and `js/src/configure` from `configure.in` and
`js/src/configure.in` respectively.
- Create the objdir.
- Run `configure` from the objdir.

The `configure` script is, nowadays, only really used as a means to set
OLD_CONFIGURE (and also for people who want to run `configure`,
literally, as in the `configure; make` workflow). `mach configure`
actually doesn't need it. Neither does recursing into `js/src` require
`js/src/configure`, since bug 1520340 (and now as of bug 1669633, we
don't even recurse).

Because configure.py can actually derive OLD_CONFIGURE on its own
(except for `js/src/configure`, but `mach configure` doesn't run that),
we don't really need `configure` for `mach configure`.

So all in all, we're at a point in history where it's straightforward to
just initiate configure.py from mach configure, so we just do that.

And in the hypothetical case where the `mach configure` code is somehow
running in python2, we get the mach virtualenv python3 and use it to
execute `configure.py`.

Differential Revision: https://phabricator.services.mozilla.com/D93741

client.mk

@@ -58,10 +58,6 @@ endif
 
 MOZ_MAKE = $(MAKE) $(MOZ_MAKE_FLAGS) -C $(OBJDIR)
 
-# 'configure' scripts generated by autoconf.
-CONFIGURES := $(TOPSRCDIR)/configure
-CONFIGURES += $(TOPSRCDIR)/js/src/configure
-
 #######################################################################
 # Rules
 
@@ -86,38 +82,6 @@ build::
 	$(if $(findstring n,$(filter-out --%, $(MAKEFLAGS))),,+)env SCCACHE_LOG=sccache=debug SCCACHE_ERROR_LOG=$(UPLOAD_PATH)/sccache.log $(MOZBUILD_MANAGE_SCCACHE_DAEMON) --start-server
 endif
 
-####################################
-# Configure
-
-$(CONFIGURES): %: %.in
-	@echo Generating $@
-	cp -f $< $@
-	chmod +x $@
-
-CONFIGURE_ENV_ARGS += \
-  MAKE='$(MAKE)' \
-  $(NULL)
-
-# configure uses the program name to determine @srcdir@. Calling it without
-#   $(TOPSRCDIR) will set @srcdir@ to "."; otherwise, it is set to the full
-#   path of $(TOPSRCDIR).
-ifeq ($(TOPSRCDIR),$(OBJDIR))
-  CONFIGURE = ./configure
-else
-  CONFIGURE = $(TOPSRCDIR)/configure
-endif
-
-configure:: $(CONFIGURES)
-	$(call BUILDSTATUS,TIERS configure)
-	$(call BUILDSTATUS,TIER_START configure)
-	@echo cd $(OBJDIR);
-	@echo $(CONFIGURE) $(CONFIGURE_ARGS)
-	@cd $(OBJDIR) && $(CONFIGURE_ENV_ARGS) $(CONFIGURE) $(CONFIGURE_ARGS) \
-	  || ( echo '*** Fix above errors and then restart with\
-               "./mach build"' && exit 1 )
-	@touch $(OBJDIR)/Makefile
-	$(call BUILDSTATUS,TIER_FINISH configure)
-
 ####################################
 # Build it
 
@@ -135,5 +99,4 @@ endif
 .NOTPARALLEL:
 
 .PHONY: \
-    build \
-    configure
+    build

configure.in

@@ -15,6 +15,5 @@
 SRCDIR=$(dirname $0)
 TOPSRCDIR="$SRCDIR"
 PYTHON3="${PYTHON3:-python3}"
-export OLD_CONFIGURE="$SRCDIR"/old-configure
 
 exec "$PYTHON3" "$TOPSRCDIR/configure.py" "$@"

configure.py

@@ -40,6 +40,9 @@ import six
 def main(argv):
     config = {}
 
+    if 'OLD_CONFIGURE' not in os.environ:
+        os.environ['OLD_CONFIGURE'] = os.path.join(base_dir, 'old-configure')
+
     sandbox = ConfigureSandbox(config, os.environ, argv)
 
     clobber_file = 'CLOBBER'

moz.configure

@@ -756,8 +756,6 @@ def config_status_deps(build_env, build_project):
 
     return list(__sandbox__._all_paths) + extra_deps + [
         os.path.join(topsrcdir, 'CLOBBER'),
-        os.path.join(topsrcdir, 'configure'),
-        os.path.join(topsrcdir, 'js', 'src', 'configure'),
         os.path.join(topsrcdir, 'configure.in'),
         os.path.join(topsrcdir, 'js', 'src', 'configure.in'),
         os.path.join(topsrcdir, 'nsprpub', 'configure'),

python/mozbuild/mozbuild/base.py

@@ -671,7 +671,7 @@ class MozbuildObject(ProcessExecutionMixin):
         """
         self._ensure_objdir_exists()
 
-        args = self._make_path()
+        args = [self._make_path()]
 
         if directory:
             args.extend(['-C', directory.replace(os.sep, '/')])
@@ -795,7 +795,7 @@ class MozbuildObject(ProcessExecutionMixin):
                     continue
             result, xcode_lisense_error_tmp = validate_make(make)
             if result:
-                return [make]
+                return make
             if xcode_lisense_error_tmp:
                 xcode_lisense_error = True
 

python/mozbuild/mozbuild/controller/building.py

@@ -31,6 +31,7 @@ except Exception:
     psutil = None
 
 from mach.mixin.logging import LoggingMixin
+from mozboot.util import get_mach_virtualenv_binary
 import mozfile
 from mozsystemmonitor.resourcemonitor import SystemResourceMonitor
 from mozterm.widgets import Footer
@@ -53,9 +54,6 @@ from ..compilation.warnings import (
     WarningsCollector,
     WarningsDatabase,
 )
-from ..shellutil import (
-    quote as shell_quote,
-)
 from ..util import (
     FileAvoidWrite,
     mkdir,
@@ -1407,19 +1405,43 @@ class BuildDriver(MozbuildObject):
 
         line_handler = line_handler or on_line
 
-        options = ' '.join(shell_quote(o) for o in options or ())
         append_env = dict(append_env or {})
-        append_env['CONFIGURE_ARGS'] = options
+        append_env['MAKE'] = self._make_path()
 
-        # Only print build status messages when we have an active
-        # monitor.
-        if not buildstatus_messages:
-            append_env['NO_BUILDSTATUS_MESSAGES'] = '1'
-        status = self._run_client_mk(target='configure',
-                                     line_handler=line_handler,
-                                     append_env=append_env)
+        # Back when client.mk was used, `mk_add_options "export ..."` lines
+        # from the mozconfig would spill into the configure environment, so
+        # add that for backwards compatibility.
+        for line in self.mozconfig['make_extra'] or []:
+            if line.startswith('export '):
+                k, eq, v = line[len('export '):].partition('=')
+                if eq == '=':
+                    append_env[k] = v
 
-        if not status:
+        if six.PY3:
+            python = sys.executable
+        else:
+            # Try to get the mach virtualenv Python if we can.
+            python = get_mach_virtualenv_binary()
+            if not os.path.exists(python):
+                python = 'python3'
+
+        command = [python, os.path.join(self.topsrcdir, 'configure.py')]
+        if options:
+            command.extend(options)
+
+        if buildstatus_messages:
+            line_handler('BUILDSTATUS TIERS configure')
+            line_handler('BUILDSTATUS TIER_START configure')
+        status = self._run_command_in_objdir(
+            args=command,
+            line_handler=line_handler,
+            append_env=append_env,
+        )
+        if buildstatus_messages:
+            line_handler('BUILDSTATUS TIER_FINISH configure')
+        if status:
+            print('*** Fix above errors and then restart with "./mach build"')
+        else:
             print('Configure complete!')
             print('Be sure to run |mach build| to pick up any changes')