forked from couchbase/cbgt
/
main_flags.go
130 lines (110 loc) · 3.46 KB
/
main_flags.go
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// Copyright (c) 2015 Couchbase, Inc.
// 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 cmd
import (
"encoding/json"
"flag"
"fmt"
"io/ioutil"
"math/rand"
"os"
"runtime"
"strings"
"time"
log "github.com/couchbase/clog"
"github.com/couchbase/cbgt"
)
func MainCommon(version string, flagAliases map[string][]string) {
if os.Getenv("GOMAXPROCS") == "" {
runtime.GOMAXPROCS(runtime.NumCPU())
}
log.Printf("main: %s started (%s/%s)",
os.Args[0], version, cbgt.VERSION)
rand.Seed(time.Now().UTC().UnixNano())
go DumpOnSignalForPlatform()
LogFlags(flagAliases)
}
func LogFlags(flagAliases map[string][]string) {
flag.VisitAll(func(f *flag.Flag) {
if flagAliases[f.Name] != nil {
log.Printf(" -%s=%q\n", f.Name, f.Value)
}
})
log.Printf(" GOMAXPROCS=%d", runtime.GOMAXPROCS(-1))
}
// --------------------------------------------------
// The user may have informed the cmd about application specific index
// types, which we need to register (albeit with fake, "error-only"
// implementations) because the cbgt's planner (cbgt.CalcPlan()) has
// safety checks which skips any unknown, unregistered index types.
func RegisterIndexTypes(indexTypes []string) {
newErrorPIndexImpl := func(indexType, indexParams,
path string, restart func()) (cbgt.PIndexImpl, cbgt.Dest, error) {
return nil, nil, fmt.Errorf("ErrorPIndex-NEW")
}
openErrorPIndexImpl := func(indexType, path string, restart func()) (
cbgt.PIndexImpl, cbgt.Dest, error) {
return nil, nil, fmt.Errorf("ErrorPIndex-OPEN")
}
for _, indexType := range indexTypes {
if cbgt.PIndexImplTypes[indexType] == nil {
cbgt.RegisterPIndexImplType(indexType,
&cbgt.PIndexImplType{
New: newErrorPIndexImpl,
Open: openErrorPIndexImpl,
})
}
}
}
// ParseOptions parses an options string and environment variable.
// The optionKVs string is a comma-separated string formated as
// "key=val,key=val,...".
func ParseOptions(optionKVs string, envName string,
options map[string]string) map[string]string {
if options == nil {
options = map[string]string{}
}
if optionKVs != "" {
for _, kv := range strings.Split(optionKVs, ",") {
a := strings.Split(kv, "=")
if len(a) >= 2 {
options[a[0]] = a[1]
}
}
}
optionsFile, exists := options["optionsFile"]
if exists {
log.Printf("main_flags: loading optionsFile: %q", optionsFile)
b, err := ioutil.ReadFile(optionsFile)
if err != nil {
log.Printf("main_flags: reading options file: %s, err: %v",
optionsFile, err)
} else {
err = json.Unmarshal(b, &options)
if err != nil {
log.Printf("main_flags: JSON parse option file: %s, err: %v",
optionsFile, err)
}
}
}
optionsEnv := os.Getenv(envName)
if optionsEnv != "" {
log.Printf("main_flags: ParseOptions, envName: %s", envName)
for _, kv := range strings.Split(optionsEnv, ",") {
a := strings.Split(kv, "=")
if len(a) >= 2 {
log.Printf("main_flags: ParseOptions, option: %s", a[0])
options[a[0]] = a[1]
}
}
}
return options
}