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Wed, 2 Sep 2020 12:59:22 +0000 (UTC) Received: from virtlab701.virt.lab.eng.bos.redhat.com (virtlab701.virt.lab.eng.bos.redhat.com [10.19.152.228]) by smtp.corp.redhat.com (Postfix) with ESMTP id 040315D9CC for ; Wed, 2 Sep 2020 12:59:21 +0000 (UTC) From: Paolo Bonzini To: qemu-devel@nongnu.org Subject: [PATCH 09/39] ninjatool: use constant names for stamp files Date: Wed, 2 Sep 2020 08:58:47 -0400 Message-Id: <20200902125917.26021-10-pbonzini@redhat.com> In-Reply-To: <20200902125917.26021-1-pbonzini@redhat.com> References: <20200902125917.26021-1-pbonzini@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=pbonzini@redhat.com X-Mimecast-Spam-Score: 0.001 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=216.205.24.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/02 01:13:52 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Numbering files according to rules causes confusion, because CUSTOM_COMMAND3.stamp from a previous build might represent completely different targets after Makefile.ninja is regenerated. As a result, the new targets are not rebuilt and compilation fails. Use the targets to build a SHA1 hash; the chances for collision are one in 2^24 even with a 12-character prefix of the hash. Signed-off-by: Paolo Bonzini --- scripts/ninjatool.py | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/scripts/ninjatool.py b/scripts/ninjatool.py index ba6bd9a2a6..627a1cab45 100755 --- a/scripts/ninjatool.py +++ b/scripts/ninjatool.py @@ -34,6 +34,7 @@ import os import re import json import argparse +import hashlib import shutil @@ -51,6 +52,9 @@ else: normpath = os.path.normpath +def sha1_text(text): + return hashlib.sha1(text.encode()).hexdigest() + # ---- lexer and parser ---- PATH_RE = r"[^$\s:|]+|\$[$ :]|\$[a-zA-Z0-9_-]+|\$\{[a-zA-Z0-9_.-]+\}" @@ -767,7 +771,6 @@ class Ninja2Make(NinjaParserEventsWithVars): self.build_vars = defaultdict(lambda: dict()) self.rule_targets = defaultdict(lambda: list()) self.stamp_targets = defaultdict(lambda: list()) - self.num_stamp = defaultdict(lambda: 0) self.all_outs = set() self.all_ins = set() self.all_phony = set() @@ -903,8 +906,7 @@ class Ninja2Make(NinjaParserEventsWithVars): if len(out) == 1: stamp = out[0] + '.stamp' else: - stamp = '%s%d.stamp' %(rule, self.num_stamp[rule]) - self.num_stamp[rule] += 1 + stamp = '%s@%s.stamp' % (rule, sha1_text(targets)[0:11]) self.print('%s: %s; @:' % (targets, stamp)) self.print('%s: %s | %s; ${ninja-command-restat}' % (stamp, inputs, orderonly)) self.rule_targets[rule].append(stamp)