Strip away a bit of cruft and add reject

src/commands.rs

@@ -3,6 +3,7 @@ crate mod cd;
 crate mod command;
 crate mod ls;
 crate mod ps;
+crate mod reject;
 crate mod select;
 crate mod take;
 crate mod to_array;

src/commands/cd.rs

@@ -1,6 +1,6 @@
 use crate::errors::ShellError;
 use crate::object::process::Process;
-use crate::object::{DirEntry, ShellObject, Value};
+use crate::object::{dir_entry_dict, ShellObject, Value};
 use crate::prelude::*;
 use crate::Args;
 use derive_new::new;

src/commands/ls.rs

@@ -1,6 +1,6 @@
 use crate::errors::ShellError;
 use crate::object::process::Process;
-use crate::object::{DirEntry, ShellObject, Value};
+use crate::object::{dir_entry_dict, ShellObject, Value};
 use crate::prelude::*;
 use crate::Args;
 use crate::Command;
@@ -37,7 +37,7 @@ impl crate::Command for Ls {
         let mut shell_entries = VecDeque::new();
 
         for entry in entries {
-            let value = Value::object(DirEntry::new(entry?)?);
+            let value = Value::Object(dir_entry_dict(&entry?)?);
             shell_entries.push_back(ReturnValue::Value(value))
         }
 

src/commands/ps.rs

@@ -1,5 +1,5 @@
 use crate::errors::ShellError;
-use crate::object::process::Process;
+use crate::object::process::process_dict;
 use crate::object::{ShellObject, Value};
 use crate::prelude::*;
 use crate::Command;
@@ -34,9 +34,7 @@ impl crate::Command for Ps {
 
         let list = list
             .into_iter()
-            .map(|(_, process)| {
-                ReturnValue::Value(Value::Object(Box::new(Process::new(process.clone()))))
-            })
+            .map(|(_, process)| ReturnValue::Value(Value::Object(process_dict(process))))
             .collect::<VecDeque<_>>();
 
         Ok(list)

src/commands/reject.rs

@@ -0,0 +1,46 @@
+use crate::errors::ShellError;
+use crate::object::base::reject;
+use crate::object::process::Process;
+use crate::object::{dir_entry_dict, ShellObject, Value};
+use crate::prelude::*;
+use crate::Args;
+use derive_new::new;
+use std::path::{Path, PathBuf};
+use sysinfo::SystemExt;
+
+#[derive(new)]
+pub struct RejectBlueprint;
+
+impl crate::CommandBlueprint for RejectBlueprint {
+    fn create(
+        &self,
+        args: Vec<Value>,
+        host: &dyn Host,
+        env: &mut Environment,
+    ) -> Result<Box<dyn Command>, ShellError> {
+        if args.is_empty() {
+            return Err(ShellError::string("take requires an integer"));
+        }
+
+        let fields: Result<_, _> = args.iter().map(|a| a.as_string()).collect();
+
+        Ok(Box::new(Reject { fields: fields? }))
+    }
+}
+
+#[derive(new)]
+pub struct Reject {
+    fields: Vec<String>,
+}
+
+impl crate::Command for Reject {
+    fn run(&mut self, stream: VecDeque<Value>) -> Result<VecDeque<ReturnValue>, ShellError> {
+        let objects = stream
+            .iter()
+            .map(|item| Value::Object(reject(item, &self.fields)))
+            .map(|item| ReturnValue::Value(item))
+            .collect();
+
+        Ok(objects)
+    }
+}

src/commands/select.rs

@@ -1,7 +1,7 @@
 use crate::errors::ShellError;
 use crate::object::base::select;
 use crate::object::process::Process;
-use crate::object::{DirEntry, ShellObject, Value};
+use crate::object::{dir_entry_dict, ShellObject, Value};
 use crate::prelude::*;
 use crate::Args;
 use derive_new::new;
@@ -37,7 +37,7 @@ impl crate::Command for Select {
     fn run(&mut self, stream: VecDeque<Value>) -> Result<VecDeque<ReturnValue>, ShellError> {
         let objects = stream
             .iter()
-            .map(|item| Value::Object(Box::new(select(item, &self.fields))))
+            .map(|item| Value::Object(select(item, &self.fields)))
             .map(|item| ReturnValue::Value(item))
             .collect();
 

src/commands/take.rs

@@ -1,6 +1,6 @@
 use crate::errors::ShellError;
 use crate::object::process::Process;
-use crate::object::{DirEntry, ShellObject, Value};
+use crate::object::{dir_entry_dict, ShellObject, Value};
 use crate::prelude::*;
 use crate::Args;
 use derive_new::new;

src/commands/to_array.rs

@@ -1,6 +1,6 @@
 use crate::errors::ShellError;
 use crate::object::process::Process;
-use crate::object::{DirEntry, ShellObject, Value};
+use crate::object::{dir_entry_dict, ShellObject, Value};
 use crate::prelude::*;
 use crate::Args;
 use derive_new::new;

src/main.rs

@@ -67,6 +67,7 @@ fn main() -> Result<(), Box<Error>> {
             ("cd", Box::new(cd::CdBlueprint)),
             ("take", Box::new(take::TakeBlueprint)),
             ("select", Box::new(select::SelectBlueprint)),
+            ("reject", Box::new(reject::RejectBlueprint)),
             ("to-array", Box::new(to_array::ToArrayBlueprint)),
         ]);
     }

src/object.rs

@@ -8,4 +8,4 @@ crate mod types;
 crate use base::{Primitive, ShellObject, Value};
 crate use desc::{DataDescriptor, DataDescriptorInstance};
 crate use dict::Dictionary;
-crate use files::DirEntry;
+crate use files::dir_entry_dict;

src/object/base.rs

@@ -51,7 +51,7 @@ impl Primitive {
 #[derive(Debug)]
 pub enum Value {
     Primitive(Primitive),
-    Object(Box<dyn ShellObject>),
+    Object(crate::object::Dictionary),
     List(Vec<Value>),
     Error(Box<ShellError>),
 }
@@ -87,7 +87,7 @@ impl ShellObject for Value {
     fn copy(&self) -> Value {
         match self {
             Value::Primitive(p) => Value::Primitive(p.clone()),
-            Value::Object(o) => Value::Object(Box::new(o.copy())),
+            Value::Object(o) => Value::Object(o.copy_dict()),
             Value::List(l) => {
                 let list = l.iter().map(|i| i.copy()).collect();
                 Value::List(list)
@@ -179,10 +179,6 @@ impl Value {
     crate fn list(values: impl Into<Vec<Value>>) -> Value {
         Value::List(values.into())
     }
-
-    crate fn object(value: impl ShellObject + 'static) -> Value {
-        Value::Object(Box::new(value))
-    }
 }
 
 pub trait ShellObject: Debug {
@@ -207,6 +203,22 @@ crate fn select(obj: impl ShellObject, fields: &[String]) -> crate::object::Dict
     out
 }
 
+crate fn reject(obj: impl ShellObject, fields: &[String]) -> crate::object::Dictionary {
+    let mut out = crate::object::Dictionary::default();
+
+    let descs = obj.data_descriptors();
+
+    for desc in descs {
+        if fields.contains(&desc.name) {
+            continue;
+        } else {
+            out.add(desc.name.clone(), obj.get_data(&desc).borrow().copy())
+        }
+    }
+
+    out
+}
+
 pub trait ToEntriesView {
     fn to_entries_view(&self) -> EntriesView;
 }

src/object/dict.rs

@@ -50,6 +50,6 @@ impl crate::object::ShellObject for Dictionary {
     }
 
     fn copy(&self) -> Value {
-        Value::Object(Box::new(self.copy_dict()))
+        Value::Object(self.copy_dict())
     }
 }

src/object/files.rs

@@ -14,59 +14,33 @@ pub enum FileType {
     Symlink,
 }
 
-impl DirEntry {
-    crate fn new(inner: std::fs::DirEntry) -> Result<DirEntry, ShellError> {
-        let mut dict = Dictionary::default();
-        let filename = inner.file_name();
-        dict.add("file name", Value::string(filename.to_string_lossy()));
+crate fn dir_entry_dict(entry: &std::fs::DirEntry) -> Result<Dictionary, ShellError> {
+    let mut dict = Dictionary::default();
+    let filename = entry.file_name();
+    dict.add("file name", Value::string(filename.to_string_lossy()));
 
-        let metadata = inner.metadata()?;
-        // let file_type = inner.file_type()?;
+    let metadata = entry.metadata()?;
+    // let file_type = inner.file_type()?;
 
-        let kind = if metadata.is_dir() {
-            FileType::Directory
-        } else if metadata.is_file() {
-            FileType::File
-        } else {
-            FileType::Symlink
-        };
+    let kind = if metadata.is_dir() {
+        FileType::Directory
+    } else if metadata.is_file() {
+        FileType::File
+    } else {
+        FileType::Symlink
+    };
 
-        dict.add("file type", Value::string(format!("{:?}", kind)));
-        dict.add(
-            "readonly",
-            Value::boolean(metadata.permissions().readonly()),
-        );
+    dict.add("file type", Value::string(format!("{:?}", kind)));
+    dict.add(
+        "readonly",
+        Value::boolean(metadata.permissions().readonly()),
+    );
 
-        dict.add("size", Value::bytes(metadata.len() as u128));
+    dict.add("size", Value::bytes(metadata.len() as u128));
 
-        dict.add("created", Value::system_date_result(metadata.created()));
-        dict.add("accessed", Value::system_date_result(metadata.accessed()));
-        dict.add("modified", Value::system_date_result(metadata.modified()));
+    dict.add("created", Value::system_date_result(metadata.created()));
+    dict.add("accessed", Value::system_date_result(metadata.accessed()));
+    dict.add("modified", Value::system_date_result(metadata.modified()));
 
-        // dict.add("created_at", Value::date())
-
-        Ok(DirEntry { dict })
-    }
-}
-
-impl ShellObject for DirEntry {
-    fn to_shell_string(&self) -> String {
-        format!("[object DirEntry]")
-    }
-
-    fn data_descriptors(&self) -> Vec<DataDescriptor> {
-        self.dict.data_descriptors()
-    }
-
-    fn get_data(&'a self, desc: &DataDescriptor) -> MaybeOwned<'a, Value> {
-        self.dict.get_data(desc)
-    }
-
-    fn copy(&self) -> Value {
-        let copy = DirEntry {
-            dict: self.dict.copy_dict(),
-        };
-
-        Value::Object(Box::new(copy))
-    }
+    Ok(dict)
 }

src/object/process.rs

@@ -11,43 +11,21 @@ pub struct Process {
     dict: Dictionary,
 }
 
-impl Process {
-    crate fn new(inner: sysinfo::Process) -> Process {
-        let mut dict = Dictionary::default();
-        dict.add("name", Value::string(inner.name()));
+crate fn process_dict(proc: &sysinfo::Process) -> Dictionary {
+    let mut dict = Dictionary::default();
+    dict.add("name", Value::string(proc.name()));
 
-        let cmd = inner.cmd();
+    let cmd = proc.cmd();
 
-        let cmd_value = if cmd.len() == 0 {
-            Value::nothing()
-        } else {
-            Value::string(join(cmd, ""))
-        };
+    let cmd_value = if cmd.len() == 0 {
+        Value::nothing()
+    } else {
+        Value::string(join(cmd, ""))
+    };
 
-        dict.add("cmd", cmd_value);
-        dict.add("pid", Value::int(inner.pid() as i64));
-        dict.add("status", Value::int(inner.status() as i64));
+    dict.add("cmd", cmd_value);
+    dict.add("pid", Value::int(proc.pid() as i64));
+    dict.add("status", Value::int(proc.status() as i64));
 
-        Process { dict }
-    }
-}
-
-impl ShellObject for Process {
-    fn to_shell_string(&self) -> String {
-        format!("Process")
-    }
-
-    fn data_descriptors(&self) -> Vec<DataDescriptor> {
-        self.dict.data_descriptors()
-    }
-
-    fn get_data(&'a self, desc: &DataDescriptor) -> MaybeOwned<'a, Value> {
-        self.dict.get_data(desc)
-    }
-
-    fn copy(&self) -> Value {
-        let copy = self.dict.copy_dict();
-
-        Value::Object(Box::new(copy))
-    }
+    dict
 }