1 files changed, 64 insertions, 0 deletions
diff --git a/u/process/run.ts b/u/process/run.ts
new file mode 100644
index 0000000..4954438
--- /dev/null
+++ b/u/process/run.ts
@@ -0,0 +1,64 @@
+import {
+  Either,
+  type IEither,
+  type ITraceable,
+  LogLevel,
+  TraceUtil,
+} from "@emprespresso/pengueno";
+
+export type Command = string[] | string;
+type CommandOutputDecoded = {
+  code: number;
+  stdoutText: string;
+  stderrText: string;
+};
+
+export const getStdout = <Trace>(
+  c: ITraceable<Command, Trace>,
+  options: Deno.CommandOptions = {},
+): Promise<IEither<Error, string>> =>
+  c.bimap(TraceUtil.withFunctionTrace(getStdout))
+    .map((tCmd) => {
+      const cmd = tCmd.get();
+      tCmd.trace.trace(`:> im gonna run this command! ${cmd}`);
+      const [exec, ...args] = (typeof cmd === "string") ? cmd.split(" ") : cmd;
+      return new Deno.Command(exec, {
+        args,
+        stdout: "piped",
+        stderr: "piped",
+        ...options,
+      }).output();
+    })
+    .map((tOut) =>
+      Either.fromFailableAsync<Error, Deno.CommandOutput>(tOut.get())
+    )
+    .map(
+      TraceUtil.promiseify((tEitherOut) =>
+        tEitherOut.get().flatMap(({ code, stderr, stdout }) =>
+          Either
+            .fromFailable<Error, CommandOutputDecoded>(() => {
+              const stdoutText = new TextDecoder().decode(stdout);
+              const stderrText = new TextDecoder().decode(stderr);
+              return { code, stdoutText, stderrText };
+            })
+            .mapLeft((e) => {
+              tEitherOut.trace.addTrace(LogLevel.ERROR).trace(`o.o wat ${e}`);
+              return new Error(`${e}`);
+            })
+            .flatMap((decodedOutput): Either<Error, string> => {
+              const { code, stdoutText, stderrText } = decodedOutput;
+              tEitherOut.trace.addTrace(LogLevel.DEBUG).trace(
+                `stderr hehehe ${stderrText}`,
+              );
+              if (code !== 0) {
+                const msg =
+                  `i weceived an exit code of ${code} i wanna zewoooo :<`;
+                tEitherOut.trace.addTrace(LogLevel.ERROR).trace(msg);
+                return Either.left(new Error(msg));
+              }
+              return Either.right(stdoutText);
+            })
+        )
+      ),
+    )
+    .get();