objectshell initial commit

src/commands/command.rs

@@ -0,0 +1,10 @@
+use crate::errors::ShellError;
+use crate::object::Value;
+
+pub trait Command {
+    fn run(
+        &mut self,
+        host: &dyn crate::Host,
+        env: &mut crate::Environment,
+    ) -> Result<Value, ShellError>;
+}

src/commands/ls.rs

@@ -0,0 +1,28 @@
+use crate::errors::ShellError;
+use crate::object::process::Process;
+use crate::object::{DirEntry, ShellObject, Value};
+use derive_new::new;
+use sysinfo::SystemExt;
+
+#[derive(new)]
+pub struct Ls;
+
+impl crate::Command for Ls {
+    fn run(
+        &mut self,
+        _host: &dyn crate::Host,
+        env: &mut crate::Environment,
+    ) -> Result<Value, ShellError> {
+        let entries =
+            std::fs::read_dir(env.cwd()).map_err((|e| ShellError::new(format!("{:?}", e))))?;
+
+        let mut shell_entries = vec![];
+
+        for entry in entries {
+            let value = Value::object(DirEntry::new(entry?)?);
+            shell_entries.push(value)
+        }
+
+        Ok(Value::list(shell_entries))
+    }
+}

src/commands/ps.rs

@@ -0,0 +1,30 @@
+use crate::errors::ShellError;
+use crate::object::process::Process;
+use crate::object::{ShellObject, Value};
+use derive_new::new;
+use sysinfo::SystemExt;
+
+#[derive(new)]
+pub struct Ps {
+    system: sysinfo::System,
+}
+
+impl crate::Command for Ps {
+    fn run(
+        &mut self,
+        _host: &dyn crate::Host,
+        _env: &mut crate::Environment,
+    ) -> Result<Value, ShellError> {
+        self.system.refresh_all();
+
+        let list = self.system.get_process_list();
+
+        let list = list
+            .into_iter()
+            .map(|(_, process)| Value::Object(Box::new(Process::new(process.clone()))))
+            .take(5)
+            .collect();
+
+        Ok(Value::List(list))
+    }
+}