From f9be962cc59cb5e75c0f50aba99a78f1090c3dad Mon Sep 17 00:00:00 2001
From: Hayleigh Thompson <me@hayleigh.dev>
Date: Wed, 10 Jan 2024 08:30:49 +0000
Subject: :sparkles: Always run 'gleam build' before starting lustre/try.

---
 src/http_ffi.erl     | 7 +++++--
 src/lustre/try.gleam | 9 +++++++--
 2 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/src/http_ffi.erl b/src/http_ffi.erl
index 355fabd..f64c559 100644
--- a/src/http_ffi.erl
+++ b/src/http_ffi.erl
@@ -1,5 +1,8 @@
 -module(http_ffi).
--export([serve/3, response_default_headers/0]).
+-export([exec/1, serve/3, response_default_headers/0]).
+
+exec(Command) ->
+    os:cmd(binary_to_list(Command)).
 
 serve({options, Host, Port, IncludeStyles}, OnStart, OnPortTaken) ->
     {ok, Pattern} = re:compile("name *= *\"(?<Name>.+)\""),
@@ -16,7 +19,7 @@ serve({options, Host, Port, IncludeStyles}, OnStart, OnPortTaken) ->
             "  <title>Lustre preview server</title>\n",
             case IncludeStyles of
                 true ->
-                     <<"  <link rel=\"stylesheet\" href=\"https://cdn.jsdelivr.net/gh/lustre-labs/ui/priv/styles.css\">\n">>;
+                    <<"  <link rel=\"stylesheet\" href=\"https://cdn.jsdelivr.net/gh/lustre-labs/ui/priv/styles.css\">\n">>;
                 false ->
                     <<"">>
             end/binary,
diff --git a/src/lustre/try.gleam b/src/lustre/try.gleam
index 3feef35..177da97 100644
--- a/src/lustre/try.gleam
+++ b/src/lustre/try.gleam
@@ -39,6 +39,7 @@ pub fn main() {
         let assert Ok(include_styles) = flag.get_bool(flags, "include-styles")
         let options = Options(host, port, include_styles)
 
+        exec("gleam build --target js")
         serve(options, on_start(host, _), on_port_taken)
       })
       |> glint.flag("host", host_flag())
@@ -79,8 +80,8 @@ fn on_start(host: String, port: Int) -> Nil {
 fn on_port_taken(port) -> Nil {
   io.println(
     "🚨 Port "
-    <> ansi.bold(int.to_string(port))
-    <> " already in use, using next available port",
+      <> ansi.bold(int.to_string(port))
+      <> " already in use, using next available port",
   )
 }
 
@@ -93,3 +94,7 @@ fn serve(
   on_start: fn(Int) -> Nil,
   on_port_taken: fn(Int) -> Nil,
 ) -> Nil
+
+@external(erlang, "http_ffi", "exec")
+@external(javascript, "node:child_process", "execSync")
+fn exec(command: String) -> String
-- 
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