config test harness.

src/commands/config.rs

@@ -1,16 +1,17 @@
-use crate::prelude::*;
-
 use crate::commands::WholeStreamCommand;
 use crate::data::{config, Value};
 use crate::errors::ShellError;
 use crate::parser::hir::SyntaxType;
 use crate::parser::registry::{self};
+use crate::prelude::*;
 use std::iter::FromIterator;
+use std::path::PathBuf;
 
 pub struct Config;
 
 #[derive(Deserialize)]
 pub struct ConfigArgs {
+    load: Option<Tagged<PathBuf>>,
     set: Option<(Tagged<String>, Tagged<Value>)>,
     get: Option<Tagged<String>>,
     clear: Tagged<bool>,
@@ -25,6 +26,7 @@ impl WholeStreamCommand for Config {
 
     fn signature(&self) -> Signature {
         Signature::build("config")
+            .named("load", SyntaxType::Path)
             .named("set", SyntaxType::Any)
             .named("get", SyntaxType::Any)
             .named("remove", SyntaxType::Any)
@@ -47,6 +49,7 @@ impl WholeStreamCommand for Config {
 
 pub fn config(
     ConfigArgs {
+        load,
         set,
         get,
         clear,
@@ -55,7 +58,15 @@ pub fn config(
     }: ConfigArgs,
     RunnableContext { name, .. }: RunnableContext,
 ) -> Result<OutputStream, ShellError> {
-    let mut result = crate::data::config::config(name)?;
+    let name_span = name;
+
+    let configuration = if let Some(supplied) = load {
+        Some(supplied.item().clone())
+    } else {
+        None
+    };
+
+    let mut result = crate::data::config::read(name_span, &configuration)?;
 
     if let Some(v) = get {
         let key = v.to_string();
@@ -63,15 +74,27 @@ pub fn config(
             .get(&key)
             .ok_or_else(|| ShellError::string(&format!("Missing key {} in config", key)))?;
 
-        return Ok(
-            stream![value.clone()].into(), // futures::stream::once(futures::future::ready(ReturnSuccess::Value(value.clone()))).into(),
-        );
+        let mut results = VecDeque::new();
+
+        match value {
+            Tagged {
+                item: Value::Table(list),
+                ..
+            } => {
+                for l in list {
+                    results.push_back(ReturnSuccess::value(l.clone()));
+                }
+            }
+            x => results.push_back(ReturnSuccess::value(x.clone())),
+        }
+
+        return Ok(results.to_output_stream());
     }
 
     if let Some((key, value)) = set {
         result.insert(key.to_string(), value.clone());
 
-        config::write_config(&result)?;
+        config::write(&result, &configuration)?;
 
         return Ok(stream![Tagged::from_simple_spanned_item(
             Value::Row(result.into()),
@@ -87,7 +110,7 @@ pub fn config(
     {
         result.clear();
 
-        config::write_config(&result)?;
+        config::write(&result, &configuration)?;
 
         return Ok(stream![Tagged::from_simple_spanned_item(
             Value::Row(result.into()),
@@ -101,10 +124,10 @@ pub fn config(
         tag: Tag { span, .. },
     } = path
     {
-        let path = config::config_path()?;
+        let path = config::default_path_for(&configuration)?;
 
         return Ok(stream![Tagged::from_simple_spanned_item(
-            Value::Primitive(Primitive::Path(path)),
+            Value::string(path.to_string_lossy()),
             span
         )]
         .from_input_stream());
@@ -115,7 +138,7 @@ pub fn config(
 
         if result.contains_key(&key) {
             result.remove(&key);
-            config::write_config(&result)?;
+            config::write(&result, &configuration)?;
         } else {
             return Err(ShellError::string(&format!(
                 "{} does not exist in config",

src/data/config.rs

@@ -11,52 +11,60 @@ use std::fs::{self, OpenOptions};
 use std::io;
 use std::path::{Path, PathBuf};
 
-const APP_INFO: AppInfo = AppInfo {
-    name: "nu",
-    author: "nu shell developers",
-};
-
 #[derive(Deserialize, Serialize)]
 struct Config {
     #[serde(flatten)]
     extra: IndexMap<String, Tagged<Value>>,
 }
 
-pub(crate) fn config_path() -> Result<PathBuf, ShellError> {
-    let location = app_root(AppDataType::UserConfig, &APP_INFO)
-        .map_err(|err| ShellError::string(&format!("Couldn't open config file:\n{}", err)))?;
+pub const APP_INFO: AppInfo = AppInfo {
+    name: "nu",
+    author: "nu shell developers",
+};
 
-    Ok(location.join("config.toml"))
+pub fn config_path() -> Result<PathBuf, ShellError> {
+    let path = app_root(AppDataType::UserConfig, &APP_INFO)
+        .map_err(|err| ShellError::string(&format!("Couldn't open config path:\n{}", err)))?;
+
+    Ok(path)
 }
 
-pub(crate) fn write_config(config: &IndexMap<String, Tagged<Value>>) -> Result<(), ShellError> {
-    let location = app_root(AppDataType::UserConfig, &APP_INFO)
-        .map_err(|err| ShellError::string(&format!("Couldn't open config file:\n{}", err)))?;
-
-    let filename = location.join("config.toml");
-    touch(&filename)?;
-
-    let contents =
-        value_to_toml_value(&Value::Row(Dictionary::new(config.clone())).tagged_unknown())?;
-
-    let contents = toml::to_string(&contents)?;
-
-    fs::write(&filename, &contents)?;
-
-    Ok(())
+pub fn default_path() -> Result<PathBuf, ShellError> {
+    default_path_for(&None)
 }
 
-pub(crate) fn config(span: impl Into<Span>) -> Result<IndexMap<String, Tagged<Value>>, ShellError> {
-    let span = span.into();
+pub fn default_path_for(file: &Option<PathBuf>) -> Result<PathBuf, ShellError> {
+    let filename = &mut config_path()?;
+    let filename = match file {
+        None => {
+            filename.push("config.toml");
+            filename
+        }
+        Some(file) => {
+            filename.push(file);
+            filename
+        }
+    };
 
-    let location = app_root(AppDataType::UserConfig, &APP_INFO)
-        .map_err(|err| ShellError::string(&format!("Couldn't open config file:\n{}", err)))?;
+    Ok(filename.clone())
+}
+
+pub fn read(
+    span: impl Into<Span>,
+    at: &Option<PathBuf>,
+) -> Result<IndexMap<String, Tagged<Value>>, ShellError> {
+    let filename = default_path()?;
+
+    let filename = match at {
+        None => filename,
+        Some(ref file) => file.clone(),
+    };
 
-    let filename = location.join("config.toml");
     touch(&filename)?;
 
     trace!("config file = {}", filename.display());
 
+    let span = span.into();
     let contents = fs::read_to_string(filename)
         .map(|v| v.simple_spanned(span))
         .map_err(|err| ShellError::string(&format!("Couldn't read config file:\n{}", err)))?;
@@ -75,6 +83,34 @@ pub(crate) fn config(span: impl Into<Span>) -> Result<IndexMap<String, Tagged<Va
     }
 }
 
+pub(crate) fn config(span: impl Into<Span>) -> Result<IndexMap<String, Tagged<Value>>, ShellError> {
+    read(span, &None)
+}
+
+pub fn write(
+    config: &IndexMap<String, Tagged<Value>>,
+    at: &Option<PathBuf>,
+) -> Result<(), ShellError> {
+    let filename = &mut default_path()?;
+    let filename = match at {
+        None => filename,
+        Some(file) => {
+            filename.pop();
+            filename.push(file);
+            filename
+        }
+    };
+
+    let contents =
+        value_to_toml_value(&Value::Row(Dictionary::new(config.clone())).tagged_unknown())?;
+
+    let contents = toml::to_string(&contents)?;
+
+    fs::write(&filename, &contents)?;
+
+    Ok(())
+}
+
 // A simple implementation of `% touch path` (ignores existing files)
 fn touch(path: &Path) -> io::Result<()> {
     match OpenOptions::new().create(true).write(true).open(path) {

src/lib.rs

@@ -28,6 +28,7 @@ pub use crate::parser::parse::token_tree_builder::TokenTreeBuilder;
 pub use crate::plugin::{serve_plugin, Plugin};
 pub use crate::utils::{AbsoluteFile, AbsolutePath, RelativePath};
 pub use cli::cli;
+pub use data::config::{APP_INFO, config_path};
 pub use data::base::{Primitive, Value};
 pub use data::dict::{Dictionary, TaggedDictBuilder};
 pub use data::meta::{Span, Tag, Tagged, TaggedItem};

tests/command_config_test.rs

@@ -0,0 +1,120 @@
+mod helpers;
+
+use helpers as h;
+use helpers::{Playground, Stub::*};
+
+use std::path::PathBuf;
+
+#[test]
+fn has_default_configuration_file() {
+	let expected = "config.toml";
+
+    Playground::setup("config_test_1", |dirs, _| {
+
+        nu!(cwd: dirs.root(), "config");
+
+        assert_eq!(
+        	dirs.config_path().join(expected),
+        	nu::config_path().unwrap().join(expected)
+        );
+    })
+}
+
+#[test]
+fn shows_path_of_configuration_file() {
+	let expected = "config.toml";
+
+    Playground::setup("config_test_2", |dirs, _| {
+
+        let actual = nu!(
+            cwd: dirs.test(),
+            "config --path | echo $it"
+        );
+
+        assert_eq!(PathBuf::from(actual), dirs.config_path().join(expected));
+    });
+}
+
+#[test]
+fn use_different_configuration() {
+    Playground::setup("config_test_3", |dirs, sandbox| {
+        sandbox
+            .with_files(vec![FileWithContent(
+                "test_3.toml",
+                r#"
+                    caballero_1 = "Andrés N. Robalino"
+                    caballero_2 = "Jonathan Turner"
+                    caballero_3 = "Yehuda katz"
+                "#
+        )]);
+
+        let actual = nu!(
+            cwd: dirs.root(),
+            "config --get caballero_1 --load {}/test_3.toml | echo $it",
+            dirs.test()
+        );
+
+        assert_eq!(actual, "Andrés N. Robalino");
+    });
+
+	h::delete_file_at(nu::config_path().unwrap().join("test_3.toml"));
+}
+
+#[test]
+fn sets_configuration_value() {
+    Playground::setup("config_test_4", |dirs, sandbox| {
+        sandbox
+            .with_files(vec![FileWithContent(
+                "test_4.toml",
+                r#"
+                    caballero_1 = "Andrés N. Robalino"
+                    caballero_2 = "Jonathan Turner"
+                    caballero_3 = "Yehuda katz"
+                "#
+        )]);
+
+        nu!(
+            cwd: dirs.test(),
+            "config --load test_4.toml --set [caballero_4 jonas]"
+        );
+
+        let actual = nu!(
+        	cwd: dirs.root(),
+        	r#"open "{}/test_4.toml" | get caballero_4 | echo $it"#,
+        	dirs.config_path()
+        );
+
+        assert_eq!(actual, "jonas");
+    });
+
+	h::delete_file_at(nu::config_path().unwrap().join("test_4.toml"));
+}
+
+#[test]
+fn removes_configuration_value() {
+    Playground::setup("config_test_5", |dirs, sandbox| {
+        sandbox
+            .with_files(vec![FileWithContent(
+                "test_5.toml",
+                r#"
+                    caballeros = [1, 1, 1]
+                    podershell = [1, 1, 1]
+                "#
+        )]);
+
+        nu!(
+            cwd: dirs.test(),
+            "config --load test_5.toml --remove podershell"
+        );
+
+        let actual = nu_error!(
+        	cwd: dirs.root(),
+        	r#"open "{}/test_5.toml" | get podershell | echo $it"#,
+        	dirs.config_path()
+        );
+
+        assert!(actual.contains("table missing column"));
+    });
+
+	h::delete_file_at(nu::config_path().unwrap().join("test_5.toml"));
+}

tests/helpers/mod.rs

@@ -4,6 +4,7 @@ use glob::glob;
 pub use std::path::Path;
 pub use std::path::PathBuf;
 
+use app_dirs::{get_app_root, AppDataType};
 use getset::Getters;
 use std::io::Read;
 use tempfile::{tempdir, TempDir};
@@ -177,6 +178,10 @@ impl Dirs {
     pub fn formats(&self) -> PathBuf {
         PathBuf::from(self.fixtures.join("formats"))
     }
+
+    pub fn config_path(&self) -> PathBuf {
+        get_app_root(AppDataType::UserConfig, &nu::APP_INFO).unwrap()
+    }
 }
 
 impl Playground {
@@ -227,8 +232,7 @@ impl Playground {
                 playground_root.join(topic).display()
             ));
 
-        let root = 
-            dunce::canonicalize(playground_root).expect(&format!(
+        let root = dunce::canonicalize(playground_root).expect(&format!(
             "Couldn't canonicalize tests root path {}",
             playground_root.display()
         ));
@@ -332,6 +336,14 @@ pub fn line_ending() -> String {
     }
 }
 
+pub fn delete_file_at(full_path: impl AsRef<Path>) {
+    let full_path = full_path.as_ref();
+
+    if full_path.exists() {
+        std::fs::remove_file(full_path).expect("can not delete file");
+    }
+}
+
 pub fn create_file_at(full_path: impl AsRef<Path>) -> Result<(), std::io::Error> {
     let full_path = full_path.as_ref();