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// Copyright 2018 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package build
import (
"fmt"
"math"
"path/filepath"
"strconv"
"strings"
"android/soong/ui/metrics"
)
const gomaCtlScript = "goma_ctl.py"
const gomaLeastNProcs = 2500
const gomaLeastNFiles = 16000
// ulimit returns ulimit result for |opt|.
// if the resource is unlimited, it returns math.MaxInt32 so that a caller do
// not need special handling of the returned value.
//
// Note that since go syscall package do not have RLIMIT_NPROC constant,
// we use bash ulimit instead.
func ulimitOrFatal(ctx Context, config Config, opt string) int {
commandText := fmt.Sprintf("ulimit %s", opt)
cmd := Command(ctx, config, commandText, "bash", "-c", commandText)
output := strings.TrimRight(string(cmd.CombinedOutputOrFatal()), "\n")
ctx.Verbose(output + "\n")
ctx.Verbose("done\n")
if output == "unlimited" {
return math.MaxInt32
}
num, err := strconv.Atoi(output)
if err != nil {
ctx.Fatalf("ulimit returned unexpected value: %s: %v\n", opt, err)
}
return num
}
func startGoma(ctx Context, config Config) {
ctx.BeginTrace(metrics.RunSetupTool, "goma_ctl")
defer ctx.EndTrace()
if u := ulimitOrFatal(ctx, config, "-u"); u < gomaLeastNProcs {
ctx.Fatalf("max user processes is insufficient: %d; want >= %d.\n", u, gomaLeastNProcs)
}
if n := ulimitOrFatal(ctx, config, "-n"); n < gomaLeastNFiles {
ctx.Fatalf("max open files is insufficient: %d; want >= %d.\n", n, gomaLeastNFiles)
}
var gomaCtl string
if gomaDir, ok := config.Environment().Get("GOMA_DIR"); ok {
gomaCtl = filepath.Join(gomaDir, gomaCtlScript)
} else if home, ok := config.Environment().Get("HOME"); ok {
gomaCtl = filepath.Join(home, "goma", gomaCtlScript)
} else {
ctx.Fatalln("goma_ctl.py not found")
}
cmd := Command(ctx, config, "goma_ctl.py ensure_start", gomaCtl, "ensure_start")
if err := cmd.Run(); err != nil {
ctx.Fatalf("goma_ctl.py ensure_start failed with: %v\n", err)
}
}
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