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|
package shared
import (
"fmt"
"os"
"os/exec"
"strings"
"syscall"
)
var (
isDebugging bool
)
// Finds the Delve binary to use. Either uses the SOONG_DELVE_PATH environment
// variable or if that is unset, looks at $PATH.
func ResolveDelveBinary() string {
result := os.Getenv("SOONG_DELVE_PATH")
if result == "" {
result, _ = exec.LookPath("dlv")
}
return result
}
// Returns whether the current process is running under Delve due to
// ReexecWithDelveMaybe().
func IsDebugging() bool {
return isDebugging
}
// Re-executes the binary in question under the control of Delve when
// delveListen is not the empty string. delvePath gives the path to the Delve.
func ReexecWithDelveMaybe(delveListen, delvePath string) {
isDebugging = os.Getenv("SOONG_DELVE_REEXECUTED") == "true"
if isDebugging || delveListen == "" {
return
}
if delvePath == "" {
fmt.Fprintln(os.Stderr, "Delve debugging requested but failed to find dlv")
os.Exit(1)
}
soongDelveEnv := []string{}
for _, env := range os.Environ() {
idx := strings.IndexRune(env, '=')
if idx != -1 {
soongDelveEnv = append(soongDelveEnv, env)
}
}
soongDelveEnv = append(soongDelveEnv, "SOONG_DELVE_REEXECUTED=true")
dlvArgv := []string{
delvePath,
"--listen=:" + delveListen,
"--headless=true",
"--api-version=2",
"exec",
os.Args[0],
"--",
}
dlvArgv = append(dlvArgv, os.Args[1:]...)
syscall.Exec(delvePath, dlvArgv, soongDelveEnv)
fmt.Fprintln(os.Stderr, "exec() failed while trying to reexec with Delve")
os.Exit(1)
}
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