chore: use lsp to get parent process id (#11083)

Removes the previously added internal `--parent-pid` flag. This solution is better.

1 files changed, 3 insertions, 44 deletions

diff --git a/cli/flags.rs b/cli/flags.rs
index 9fc3103b4..c5742af6f 100644
--- a/cli/flags.rs
+++ b/cli/flags.rs
@@ -84,9 +84,7 @@ pub enum DenoSubcommand {
     root: Option<PathBuf>,
     force: bool,
   },
-  Lsp {
-    parent_pid: Option<u32>,
-  },
+  Lsp,
   Lint {
     files: Vec<PathBuf>,
     ignore: Vec<PathBuf>,
@@ -878,16 +876,6 @@ go-to-definition support and automatic code formatting.
 
 How to connect various editors and IDEs to 'deno lsp':
 https://deno.land/manual/getting_started/setup_your_environment#editors-and-ides")
-    .arg(
-      Arg::with_name("parent-pid")
-        .long("parent-pid")
-        .help("The parent process id to periodically check for the existence of or exit")
-        .takes_value(true)
-        .validator(|val: String| match val.parse::<usize>() {
-          Ok(_) => Ok(()),
-          Err(_) => Err("parent-pid should be a number".to_string()),
-        }),
-    )
 }
 
 fn lint_subcommand<'a, 'b>() -> App<'a, 'b> {
@@ -1633,11 +1621,8 @@ fn install_parse(flags: &mut Flags, matches: &clap::ArgMatches) {
   };
 }
 
-fn lsp_parse(flags: &mut Flags, matches: &clap::ArgMatches) {
-  let parent_pid = matches
-    .value_of("parent-pid")
-    .map(|val| val.parse().unwrap());
-  flags.subcommand = DenoSubcommand::Lsp { parent_pid };
+fn lsp_parse(flags: &mut Flags, _matches: &clap::ArgMatches) {
+  flags.subcommand = DenoSubcommand::Lsp;
 }
 
 fn lint_parse(flags: &mut Flags, matches: &clap::ArgMatches) {
@@ -2318,32 +2303,6 @@ mod tests {
   }
 
   #[test]
-  fn lsp() {
-    let r = flags_from_vec(svec!["deno", "lsp"]);
-    assert_eq!(
-      r.unwrap(),
-      Flags {
-        subcommand: DenoSubcommand::Lsp { parent_pid: None },
-        ..Flags::default()
-      }
-    );
-
-    let r = flags_from_vec(svec!["deno", "lsp", "--parent-pid", "5"]);
-    assert_eq!(
-      r.unwrap(),
-      Flags {
-        subcommand: DenoSubcommand::Lsp {
-          parent_pid: Some(5),
-        },
-        ..Flags::default()
-      }
-    );
-
-    let r = flags_from_vec(svec!["deno", "lsp", "--parent-pid", "invalid-arg"]);
-    assert!(r.is_err());
-  }
-
-  #[test]
   fn lint() {
     let r = flags_from_vec(svec!["deno", "lint", "script_1.ts", "script_2.ts"]);
     assert_eq!(