A dumb simple user-space process manager, with internals exposed as a usable go package.
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pmux/pmuxlib/pmuxlib.go

49 lines
1.1 KiB

// Package pmuxlib implements the process management aspects of the pmux
// process.
package pmuxlib
import (
"context"
"os"
"sync"
)
type Config struct {
TimeFormat string `yaml:"timeFormat"`
Processes []ProcessConfig `yaml:"processes"`
}
// Run runs the given configuration as if this was a real pmux process.
func Run(ctx context.Context, cfg Config) {
stdoutLogger := newLogger(os.Stdout, logSepStdout, cfg.TimeFormat)
defer stdoutLogger.Close()
stderrLogger := newLogger(os.Stderr, logSepStderr, cfg.TimeFormat)
defer stderrLogger.Close()
sysLogger := stderrLogger.withSep(logSepSys)
defer sysLogger.Println("exited gracefully, ciao!")
var wg sync.WaitGroup
defer wg.Wait()
for _, cfgProc := range cfg.Processes {
wg.Add(1)
go func(procCfg ProcessConfig) {
defer wg.Done()
stdoutLogger := stdoutLogger.withPName(procCfg.Name)
stderrLogger := stderrLogger.withPName(procCfg.Name)
sysLogger := sysLogger.withPName(procCfg.Name)
sysLogger.Println("starting process")
defer sysLogger.Println("stopped process handler")
RunProcess(
ctx, stdoutLogger, stderrLogger, sysLogger, procCfg,
)
}(cfgProc)
}
}