86 lines
2.7 KiB
Go
86 lines
2.7 KiB
Go
// Copyright 2017 Google Inc. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package build
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import (
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"bufio"
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"path/filepath"
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"runtime"
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"strings"
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)
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// Checks for files in the out directory that have a rule that depends on them but no rule to
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// create them. This catches a common set of build failures where a rule to generate a file is
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// deleted (either by deleting a module in an Android.mk file, or by modifying the build system
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// incorrectly). These failures are often not caught by a local incremental build because the
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// previously built files are still present in the output directory.
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func testForDanglingRules(ctx Context, config Config) {
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// Many modules are disabled on mac. Checking for dangling rules would cause lots of build
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// breakages, and presubmit wouldn't catch them, so just disable the check.
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if runtime.GOOS != "linux" {
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return
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}
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ctx.BeginTrace("test for dangling rules")
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defer ctx.EndTrace()
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// Get a list of leaf nodes in the dependency graph from ninja
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executable := config.PrebuiltBuildTool("ninja")
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args := []string{}
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args = append(args, config.NinjaArgs()...)
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args = append(args, "-f", config.CombinedNinjaFile())
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args = append(args, "-t", "targets", "rule")
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cmd := Command(ctx, config, "ninja", executable, args...)
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stdout, err := cmd.StdoutPipe()
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if err != nil {
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ctx.Fatal(err)
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}
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cmd.StartOrFatal()
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outDir := config.OutDir()
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bootstrapDir := filepath.Join(outDir, "soong", ".bootstrap")
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miniBootstrapDir := filepath.Join(outDir, "soong", ".minibootstrap")
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var danglingRules []string
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scanner := bufio.NewScanner(stdout)
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for scanner.Scan() {
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line := scanner.Text()
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if !strings.HasPrefix(line, outDir) {
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// Leaf node is not in the out directory.
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continue
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}
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if strings.HasPrefix(line, bootstrapDir) || strings.HasPrefix(line, miniBootstrapDir) {
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// Leaf node is in one of Soong's bootstrap directories, which do not have
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// full build rules in the primary build.ninja file.
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continue
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}
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danglingRules = append(danglingRules, line)
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}
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cmd.WaitOrFatal()
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if len(danglingRules) > 0 {
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ctx.Println("Dependencies in out found with no rule to create them:")
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for _, dep := range danglingRules {
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ctx.Println(dep)
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}
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ctx.Fatal("")
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}
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}
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