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hook.go
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hook.go
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// Package hook implements the necessary handle for git hooks used by pcompose
package hook
import (
"fmt"
"io"
"log"
"os"
"os/exec"
"path"
"path/filepath"
"strings"
"github.com/antoniomika/pcompose/utils"
"github.com/spf13/viper"
)
// Start initializes the git hook command.
func Start() {
hookType := strings.TrimPrefix(os.Args[0], utils.HooksDirName)
repoDir, err := os.Getwd()
if err != nil {
log.Println("Error getting working directory:", err)
}
data, err := io.ReadAll(os.Stdin)
if err != nil {
log.Println("Error reading from stdin:", err)
}
commandArgs := strings.Fields(strings.TrimSpace(string(data)))
var oldRev string
var newRev string
var refName string
if len(commandArgs) > len(os.Args) {
oldRev = commandArgs[0]
newRev = commandArgs[1]
refName = commandArgs[2]
} else {
oldRev = os.Args[2]
newRev = os.Args[3]
refName = os.Args[1]
}
switch hookType {
case "pre-receive":
handlePreReceive(hookType, repoDir, oldRev, newRev, refName)
case "update":
handleUpdate(hookType, repoDir, oldRev, newRev, refName)
case "post-receive":
handlePostReceive(hookType, repoDir, oldRev, newRev, refName)
default:
log.Println("Undefined hook type:", hookType)
return
}
}
func handlePreReceive(hookType, repoDir, oldRev, newRev, refName string) {
}
func handleUpdate(hookType, repoDir, oldRev, newRev, refName string) {
}
func handlePostReceive(hookType, repoDir, oldRev, newRev, refName string) {
deploymentDir := path.Join(repoDir, path.Base(repoDir))
if _, err := os.Stat(deploymentDir); os.IsNotExist(err) {
cloneCmd := exec.Command("git", "clone", repoDir, deploymentDir)
err := cloneCmd.Run()
if err != nil {
log.Println("Error cloning git repository:", err)
os.Exit(1)
}
} else {
fetchCmd := exec.Command("git", "fetch")
fetchCmd.Dir = deploymentDir
fetchCmd.Env = append(fetchCmd.Env, "GIT_DIR=.git")
err := fetchCmd.Run()
if err != nil {
log.Println("Error fetching git repository:", err)
os.Exit(1)
}
mainBranchCmd := exec.Command("sh", "-c", "git symbolic-ref refs/remotes/origin/HEAD | sed 's@^refs/remotes/origin/@@'")
mainBranchCmd.Dir = deploymentDir
mainBranchCmd.Env = append(mainBranchCmd.Env, "GIT_DIR=.git")
mainBranch, err := mainBranchCmd.Output()
if err != nil {
log.Println("Error getting main branch:", err)
os.Exit(1)
}
mainBranchString := strings.TrimSpace(string(mainBranch))
if mainBranchString == "" {
mainBranchString = "main"
}
resetCmd := exec.Command("git", "reset", fmt.Sprintf("origin/%s", mainBranchString), "--hard")
resetCmd.Dir = deploymentDir
resetCmd.Env = append(resetCmd.Env, "GIT_DIR=.git")
err = resetCmd.Run()
if err != nil {
log.Println("Error resetting git repository:", err)
os.Exit(1)
}
}
executable, err := os.Executable()
if err != nil {
log.Println("Error getting executable path:", err)
}
executablePath, err := filepath.EvalSymlinks(executable)
if err != nil {
log.Println("Unable to evaluate symlink:", err)
}
appDir := path.Dir(executablePath)
dataDir := viper.GetString("data-directory")
if !path.IsAbs(dataDir) {
dataDir = path.Join(appDir, dataDir)
}
pathSlice := strings.Split(strings.TrimPrefix(repoDir, dataDir+string(os.PathSeparator)), string(os.PathSeparator))
composeProject := strings.Join(pathSlice, "_")
networkName := fmt.Sprintf("%s_default", composeProject)
networkCreate := exec.Command("docker", "network", "create", networkName)
networkCreate.Dir = deploymentDir
_ = networkCreate.Run()
networkConnect := exec.Command("docker", "network", "connect", networkName, viper.GetString("frontend-container-name"))
networkConnect.Dir = deploymentDir
_ = networkConnect.Run()
cmd := exec.Command("docker-compose", "-p", composeProject, "up", "-d", "--build")
cmd.Dir = deploymentDir
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
err = cmd.Run()
if err != nil {
log.Println("Error running docker-compose up:", err)
os.Exit(1)
}
}