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Use subcommands instead of flags

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This commit is contained in:
Derek Parker
2015-03-08 21:26:45 -05:00
parent 11405314d8
commit 4e43b0f8c0
3 changed files with 28 additions and 16 deletions
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4
README.md
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@ -50,7 +50,7 @@ The debugger can be launched in three ways:
* Compile, run, and attach in one step: * Compile, run, and attach in one step:
``` ```
$ dlv -run $ dlv run
``` ```
* Provide the name of the program you want to debug, and the debugger will launch it for you. * Provide the name of the program you want to debug, and the debugger will launch it for you.
@ -62,7 +62,7 @@ The debugger can be launched in three ways:
* Provide the pid of a currently running process, and the debugger will attach and begin the session. * Provide the pid of a currently running process, and the debugger will attach and begin the session.
``` ```
$ sudo dlv -pid 44839 $ sudo dlv attach 44839
``` ```
### Breakpoints ### Breakpoints

13
client/cli/cli.go
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@ -7,6 +7,7 @@ import (
"os/exec" "os/exec"
"os/signal" "os/signal"
"strings" "strings"
"strconv"
sys "golang.org/x/sys/unix" sys "golang.org/x/sys/unix"
@ -18,7 +19,7 @@ import (
const historyFile string = ".dbg_history" const historyFile string = ".dbg_history"
func Run(run bool, pid int, args []string) { func Run(args []string) {
var ( var (
dbp *proctl.DebuggedProcess dbp *proctl.DebuggedProcess
err error err error
@ -26,8 +27,8 @@ func Run(run bool, pid int, args []string) {
) )
defer line.Close() defer line.Close()
switch { switch args[0] {
case run: case "run":
const debugname = "debug" const debugname = "debug"
cmd := exec.Command("go", "build", "-o", debugname, "-gcflags", "-N -l") cmd := exec.Command("go", "build", "-o", debugname, "-gcflags", "-N -l")
err := cmd.Run() err := cmd.Run()
@ -40,7 +41,11 @@ func Run(run bool, pid int, args []string) {
if err != nil { if err != nil {
die(1, "Could not launch program:", err) die(1, "Could not launch program:", err)
} }
case pid != 0: case "attach":
pid, err := strconv.Atoi(args[1])
if err != nil {
die(1, "Invalid pid", args[1])
}
dbp, err = proctl.Attach(pid) dbp, err = proctl.Attach(pid)
if err != nil { if err != nil {
die(1, "Could not attach to process:", err) die(1, "Could not attach to process:", err)

27
cmd/dlv/main.go
View File

@ -11,6 +11,20 @@ import (
const version string = "0.5.0.beta" const version string = "0.5.0.beta"
var usage string = fmt.Sprintf(`Delve version %s
flags:
-v - Print version
Invoke with the path to a binary:
dlv ./path/to/prog
or use the following commands:
run - Build, run, and attach to program
attach - Attach to running process
`, version)
func init() { func init() {
// We must ensure here that we are running on the same thread during // We must ensure here that we are running on the same thread during
// the execution of dbg. This is due to the fact that ptrace(2) expects // the execution of dbg. This is due to the fact that ptrace(2) expects
@ -19,19 +33,12 @@ func init() {
} }
func main() { func main() {
var ( var printv bool
pid int
run bool
printv bool
)
flag.IntVar(&pid, "pid", 0, "Pid of running process to attach to.")
flag.BoolVar(&run, "run", false, "Compile program and begin debug session.")
flag.BoolVar(&printv, "v", false, "Print version number and exit.")
flag.Parse() flag.Parse()
if flag.NFlag() == 0 && len(flag.Args()) == 0 { if flag.NFlag() == 0 && len(flag.Args()) == 0 {
flag.Usage() fmt.Println(usage)
os.Exit(0) os.Exit(0)
} }
@ -40,5 +47,5 @@ func main() {
os.Exit(0) os.Exit(0)
} }
cli.Run(run, pid, flag.Args()) cli.Run(os.Args[1:])
} }