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debug.go
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debug.go
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package main
import (
"fmt"
"os"
"strings"
"github.com/magefile/mage/mg"
)
var (
dlvString string = "dlv debug --listen=:4000 --headless=true --log=true --accept-multiclient --api-version=2 --continue --output __debug_server cmd/%s/main.go --"
migrateString string = "go run ./cmd/%s/main.go"
imageName string = "go-delve"
)
func createDelveImage() error {
dockerFile := "./developer/debug/Dockerfile"
err := dockerRun("build", "-t", imageName, "-f", dockerFile, ".")
if err != nil {
return err
}
return nil
}
// Creates a docker-compose file that runs Armada with Delve.
func CreateDelveCompose() error {
mg.Deps(createDelveImage)
data, err := os.ReadFile("docker-compose.yaml")
if err != nil {
return err
}
var folderName string
var binaryName string
var newService bool = false
lines := strings.Split(string(data), "\n")
for i, line := range lines {
// Ensures that the binary name is correct
if strings.HasPrefix(line, " ") && !strings.HasPrefix(line, " ") {
folderName = strings.Split(strings.TrimPrefix(line, " "), ":")[0]
binaryName = folderName
// Deal with the edge case that the server binary
// Has a different config name
if folderName == "server" {
folderName = "armada"
}
newService = true
}
// Correctly inserts the delve command into the docker-compose file
if strings.HasPrefix(line, " command: ./") {
lines[i] = strings.Replace(line, "./"+binaryName, fmt.Sprintf(dlvString, folderName), 1)
// Add quotes around the command
lines[i] = strings.Replace(lines[i], "command: ", "command: \"'", 1)
lines[i] = lines[i] + "'\""
// Add Delve output file.
lines[i] = strings.Replace(lines[i], "__debug_server", fmt.Sprintf("./delve/__debug_%s", folderName), 1)
}
// Inserts the delve command for the lookout services
// They have an extra migration step that doesn't need delve.
if strings.HasPrefix(line, " entrypoint: ") && strings.Contains(line, "./lookout") {
// This time, replace the first instance of ./lookout with the migrate command
lines[i] = strings.Replace(line, "./"+binaryName, fmt.Sprintf(migrateString, folderName), 1)
// Then, replace the second instance of ./lookout with the dlv command
lines[i] = strings.Replace(lines[i], "./"+binaryName, fmt.Sprintf(dlvString, folderName), 1)
// Add Delve output file.
lines[i] = strings.Replace(lines[i], "__debug_server", fmt.Sprintf("./delve/__debug_%s", folderName), 1)
}
// Add a new volume "./:/app" to the service
if newService && strings.HasPrefix(line, " volumes:") {
lines[i] = lines[i] + "\n - ./:/app:rw"
newService = false
}
}
output := strings.Join(lines, "\n")
err = os.WriteFile("docker-compose.dev.yaml", []byte(output), os.ModePerm)
if err != nil {
return err
}
fmt.Println("Create Delve Compose File successfully!")
return nil
}
// Runs Armada with a range of debugging options.
func Debug(arg string) error {
switch arg {
case "delve":
mg.Deps(CreateDelveCompose, mg.F(LocalDev, "debug"))
err := os.MkdirAll("./delve", os.ModePerm)
if err != nil {
return err
}
os.Setenv("ARMADA_IMAGE", imageName)
os.Setenv("COMPOSE_FILE", "docker-compose.dev.yaml")
err = StartComponents()
if err != nil {
return err
}
fmt.Println("Please give up to 5 minutes for compilation.")
case "vscode":
mg.Deps(StopComponents)
mg.Deps(mg.F(LocalDev, "debug"))
fmt.Println("\nPlease now use the following launch.json configuration in VSCode:")
fmt.Println("./developer/debug/launch.json")
_, err := os.Stat("./.vscode/launch.json")
if os.IsNotExist(err) {
fmt.Println("\nCreating launch.json file automatically...")
err = os.MkdirAll("./.vscode", os.ModePerm)
if err != nil {
return err
}
bytes, err := os.ReadFile("./developer/debug/launch.json")
if err != nil {
return err
}
err = os.WriteFile("./.vscode/launch.json", bytes, os.ModePerm)
if err != nil {
return err
}
}
case "local":
mg.Deps(StopComponents)
mg.Deps(mg.F(LocalDev, "debug"))
fmt.Println("\nPlease see the developer docs for more info: ./docs/developer.md")
fmt.Println("\n Also see ./developer/env/README.md for more info on the environment variables needed for running locally.")
default:
fmt.Println("Invalid argument. Please use 'delve' to debug.")
}
return nil
}