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main.go
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main.go
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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package main
import (
"errors"
"flag"
"fmt"
"log"
"os"
"os/signal"
"path/filepath"
"time"
)
var (
flagDir = flag.String("dir", "", "The relative directory to operate from, defaults to current directory")
flagConfigFilePath = flag.String("file", "service-test.yaml", "The configuration file to use relative to the context directory")
flagTimeout = flag.Duration("timeout", 5*time.Second, "The time to wait until timing out")
flagNoVerifyOutput = flag.Bool("no-validate-output", false, "Do not validate output and just run the commands")
flagDebug = flag.Bool("debug", false, "Log debug information")
errSignal = errors.New("signal")
)
func main() {
flag.Parse()
if err := do(
*flagDir,
*flagConfigFilePath,
*flagTimeout,
!(*flagNoVerifyOutput),
*flagDebug,
); err != nil {
log.Fatal(err)
}
}
func do(
dir string,
configFilePath string,
timeout time.Duration,
validateOutput bool,
debug bool,
) (err error) {
cmds, err := newCmds(configFilePath, dir, debug)
if err != nil {
return err
}
defer cleanupCmds(cmds, validateOutput, err)
signalC := make(chan os.Signal, 1)
signal.Notify(signalC, os.Interrupt)
go func() {
for range signalC {
cleanupCmds(cmds, validateOutput, errSignal)
}
os.Exit(1)
}()
errC := make(chan error)
go func() { errC <- runCmds(cmds) }()
select {
case err := <-errC:
if err != nil {
return err
}
case <-time.After(timeout):
return fmt.Errorf("timed out after %v", timeout)
}
if validateOutput {
return validateCmds(cmds)
}
return nil
}
func newCmds(configFilePath string, dir string, debug bool) ([]*cmd, error) {
config, err := newConfig(filepath.Join(dir, configFilePath))
if err != nil {
return nil, err
}
return config.Cmds(dir, debug)
}
func runCmds(cmds []*cmd) error {
for i := 0; i < len(cmds)-1; i++ {
cmd := cmds[i]
if err := cmd.Start(); err != nil {
return err
}
defer func() {
cmd.Kill()
_ = cmd.Wait()
}()
}
cmd := cmds[len(cmds)-1]
if err := cmd.Start(); err != nil {
return err
}
return cmd.Wait()
}
func validateCmds(cmds []*cmd) error {
for _, cmd := range cmds {
if err := cmd.Validate(); err != nil {
return err
}
}
return nil
}
func cleanupCmds(cmds []*cmd, validateOutput bool, err error) {
for _, cmd := range cmds {
cmd.Clean(validateOutput && err == nil)
}
}