99 lines
2.1 KiB
Go
99 lines
2.1 KiB
Go
package main
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import (
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"bufio"
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"log"
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"os/exec"
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"regexp"
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)
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type Action struct {
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regex, cmd []string
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}
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type compiledAction struct {
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regex []regexp.Regexp
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cmd []string
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}
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type Stream struct {
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cmd []string
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actions []Action
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}
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func compileAction(action Action) compiledAction {
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var ca compiledAction
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ca.cmd = action.cmd
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for _, regex := range action.regex {
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ca.regex = append(ca.regex, *regexp.MustCompile(regex))
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}
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return ca
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}
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// Handle a log command
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// Must be started in a goroutine
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func streamHandle(stream Stream, execQueue chan []string) {
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log.Printf("streamHandle{%v}: start\n", stream.cmd)
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cmd := exec.Command(stream.cmd[0], stream.cmd[1:]...)
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stdout, err := cmd.StdoutPipe()
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if err != nil {
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log.Fatal("couldn't open stdout on command:", err)
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}
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if err := cmd.Start(); err != nil {
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log.Fatal("couldn't start command:", err)
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}
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defer stdout.Close()
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compiledActions := make([]compiledAction, 0, len(stream.actions))
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for _, action := range stream.actions {
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compiledActions = append(compiledActions, compileAction(action))
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}
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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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for _, action := range compiledActions {
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for _, regex := range action.regex {
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if match := regex.FindString(line); match != "" {
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log.Printf("match `%v` in line: `%v`\n", regex.String(), line)
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execQueue <- action.cmd
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}
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}
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}
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}
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}
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func execQueue() chan []string {
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queue := make(chan []string)
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go func() {
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for {
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command := <-queue
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cmd := exec.Command(command[0], command[1:]...)
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if ret := cmd.Run(); ret != nil {
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log.Printf("Error launching `%v`: code %v\n", cmd, ret)
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}
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}
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}()
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return queue
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}
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func main() {
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conf := parseConf("./reaction.yml")
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conf = conf
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// mockstreams := []Stream{Stream{
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// []string{"tail", "-f", "/home/ao/DOWN"},
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// []Action{Action{
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// []string{"prout.dev"},
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// []string{"touch", "/home/ao/DAMN"},
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// }},
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// }}
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// streams := mockstreams
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// log.Println(streams)
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// queue := execQueue()
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// for _, stream := range streams {
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// go streamHandle(stream, queue)
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// }
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// // Infinite wait
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// <-make(chan bool)
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}
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