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Add virtual path abstraction layer (#9245)

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Jakub Žádník 2023-05-23 23:48:50 +03:00 committed by GitHub
parent db4b26c1ac
commit 74724dee80
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19 changed files with 500 additions and 323 deletions
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1
Cargo.lock generated
View File

@ -2947,6 +2947,7 @@ name = "nu-std"
version = "0.80.1"
dependencies = [
"miette",
"nu-engine",
"nu-parser",
"nu-protocol",
]

2
crates/nu-parser/src/lib.rs
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@ -7,6 +7,7 @@ mod lite_parser;
mod parse_keywords;
mod parse_patterns;
mod parser;
mod parser_path;
mod type_check;
pub use deparse::{escape_for_script_arg, escape_quote_string};
@ -17,6 +18,7 @@ pub use known_external::KnownExternal;
pub use lex::{lex, lex_signature, Token, TokenContents};
pub use lite_parser::{lite_parse, LiteBlock, LiteElement};
pub use parse_keywords::*;
pub use parser_path::*;
pub use parser::{
is_math_expression_like, parse, parse_block, parse_expression, parse_external_call,

252
crates/nu-parser/src/parse_keywords.rs
View File

@ -1,3 +1,4 @@
use crate::parser_path::ParserPath;
use itertools::Itertools;
use log::trace;
use nu_path::canonicalize_with;
@ -1724,14 +1725,14 @@ pub fn parse_module_block(
fn parse_module_file(
working_set: &mut StateWorkingSet,
path: PathBuf,
path: ParserPath,
path_span: Span,
name_override: Option<String>,
) -> Option<ModuleId> {
if let Some(i) = working_set
.parsed_module_files
.iter()
.rposition(|p| p == &path)
.rposition(|p| p == path.path())
{
let mut files: Vec<String> = working_set
.parsed_module_files
@ -1740,7 +1741,7 @@ fn parse_module_file(
.map(|p| p.to_string_lossy().to_string())
.collect();
files.push(path.to_string_lossy().to_string());
files.push(path.path().to_string_lossy().to_string());
let msg = files.join("\nuses ");
@ -1757,14 +1758,14 @@ fn parse_module_file(
return None;
};
let contents = if let Ok(contents) = std::fs::read(&path) {
let contents = if let Some(contents) = path.read(working_set) {
contents
} else {
working_set.error(ParseError::ModuleNotFound(path_span));
return None;
};
let file_id = working_set.add_file(path.to_string_lossy().to_string(), &contents);
let file_id = working_set.add_file(path.path().to_string_lossy().to_string(), &contents);
let new_span = working_set.get_span_for_file(file_id);
if let Some(module_id) = working_set.find_module_by_span(new_span) {
@ -1773,17 +1774,13 @@ fn parse_module_file(
// Change the currently parsed directory
let prev_currently_parsed_cwd = if let Some(parent) = path.parent() {
let prev = working_set.currently_parsed_cwd.clone();
working_set.currently_parsed_cwd = Some(parent.into());
prev
working_set.currently_parsed_cwd.replace(parent.into())
} else {
working_set.currently_parsed_cwd.clone()
};
// Add the file to the stack of parsed module files
working_set.parsed_module_files.push(path);
working_set.parsed_module_files.push(path.path_buf());
// Parse the module
let (block, module, module_comments) =
@ -1824,91 +1821,87 @@ pub fn parse_module_file_or_dir(
};
if module_path.is_dir() {
if let Ok(dir_contents) = std::fs::read_dir(&module_path) {
let module_name = if let Some(stem) = module_path.file_stem() {
stem.to_string_lossy().to_string()
} else {
working_set.error(ParseError::ModuleNotFound(path_span));
return None;
};
let Some(dir_contents) = module_path.read_dir() else {
working_set.error(ParseError::ModuleNotFound(path_span));
return None;
};
let mod_nu_path = module_path.join("mod.nu");
if !(mod_nu_path.exists() && mod_nu_path.is_file()) {
working_set.error(ParseError::ModuleMissingModNuFile(path_span));
return None;
}
let mut paths = vec![];
for entry in dir_contents.flatten() {
let entry_path = entry.path();
if (entry_path.is_file()
&& entry_path.extension() == Some(OsStr::new("nu"))
&& entry_path.file_stem() != Some(OsStr::new("mod")))
|| (entry_path.is_dir() && entry_path.join("mod.nu").exists())
{
if entry_path.file_stem() == Some(OsStr::new(&module_name)) {
working_set.error(ParseError::InvalidModuleFileName(
module_path.to_string_lossy().to_string(),
module_name,
path_span,
));
return None;
}
paths.push(entry_path);
}
}
paths.sort();
// working_set.enter_scope();
let mut submodules = vec![];
for p in paths {
if let Some(submodule_id) = parse_module_file_or_dir(
working_set,
p.to_string_lossy().as_bytes(),
path_span,
None,
) {
let submodule_name = working_set.get_module(submodule_id).name();
submodules.push((submodule_name, submodule_id));
}
}
if let Some(module_id) = parse_module_file(
working_set,
mod_nu_path,
path_span,
name_override.or(Some(module_name)),
) {
let mut module = working_set.get_module(module_id).clone();
for (submodule_name, submodule_id) in submodules {
module.add_submodule(submodule_name, submodule_id);
}
let module_name = String::from_utf8_lossy(&module.name).to_string();
let module_comments =
if let Some(comments) = working_set.get_module_comments(module_id) {
comments.to_vec()
} else {
vec![]
};
let new_module_id = working_set.add_module(&module_name, module, module_comments);
Some(new_module_id)
} else {
None
}
let module_name = if let Some(stem) = module_path.file_stem() {
stem.to_string_lossy().to_string()
} else {
working_set.error(ParseError::ModuleNotFound(path_span));
return None;
};
let mod_nu_path = module_path.clone().join("mod.nu");
if !(mod_nu_path.exists() && mod_nu_path.is_file()) {
working_set.error(ParseError::ModuleMissingModNuFile(path_span));
return None;
}
let mut paths = vec![];
for entry_path in dir_contents {
if (entry_path.is_file()
&& entry_path.extension() == Some(OsStr::new("nu"))
&& entry_path.file_stem() != Some(OsStr::new("mod")))
|| (entry_path.is_dir() && entry_path.clone().join("mod.nu").exists())
{
if entry_path.file_stem() == Some(OsStr::new(&module_name)) {
working_set.error(ParseError::InvalidModuleFileName(
module_path.path().to_string_lossy().to_string(),
module_name,
path_span,
));
return None;
}
paths.push(entry_path);
}
}
paths.sort();
let mut submodules = vec![];
for p in paths {
if let Some(submodule_id) = parse_module_file_or_dir(
working_set,
p.path().to_string_lossy().as_bytes(),
path_span,
None,
) {
let submodule_name = working_set.get_module(submodule_id).name();
submodules.push((submodule_name, submodule_id));
}
}
if let Some(module_id) = parse_module_file(
working_set,
mod_nu_path,
path_span,
name_override.or(Some(module_name)),
) {
let mut module = working_set.get_module(module_id).clone();
for (submodule_name, submodule_id) in submodules {
module.add_submodule(submodule_name, submodule_id);
}
let module_name = String::from_utf8_lossy(&module.name).to_string();
let module_comments = if let Some(comments) = working_set.get_module_comments(module_id)
{
comments.to_vec()
} else {
vec![]
};
let new_module_id = working_set.add_module(&module_name, module, module_comments);
Some(new_module_id)
} else {
None
}
} else if module_path.is_file() {
@ -2017,19 +2010,13 @@ pub fn parse_module(
}]);
if spans.len() == split_id + 1 {
let cwd = working_set.get_cwd();
if let Some(module_path) =
find_in_dirs(&module_name_or_path, working_set, &cwd, LIB_DIRS_VAR)
{
let path_str = module_path.to_string_lossy().to_string();
let maybe_module_id = parse_module_file_or_dir(
working_set,
path_str.as_bytes(),
module_name_or_path_span,
None,
);
return (pipeline, maybe_module_id);
if let Some(module_id) = parse_module_file_or_dir(
working_set,
module_name_or_path.as_bytes(),
module_name_or_path_span,
None,
) {
return (pipeline, Some(module_id));
} else {
working_set.error(ParseError::ModuleNotFound(module_name_or_path_span));
return (pipeline, None);
@ -3043,14 +3030,10 @@ pub fn parse_source(working_set: &mut StateWorkingSet, spans: &[Span]) -> Pipeli
};
if let Some(path) = find_in_dirs(&filename, working_set, &cwd, LIB_DIRS_VAR) {
if let Ok(contents) = std::fs::read(&path) {
if let Some(contents) = path.read(working_set) {
// Change currently parsed directory
let prev_currently_parsed_cwd = if let Some(parent) = path.parent() {
let prev = working_set.currently_parsed_cwd.clone();
working_set.currently_parsed_cwd = Some(parent.into());
prev
working_set.currently_parsed_cwd.replace(parent.into())
} else {
working_set.currently_parsed_cwd.clone()
};
@ -3059,7 +3042,7 @@ pub fn parse_source(working_set: &mut StateWorkingSet, spans: &[Span]) -> Pipeli
// working set, if it was a successful parse.
let block = parse(
working_set,
Some(&path.to_string_lossy()),
Some(&path.path().to_string_lossy()),
&contents,
scoped,
);
@ -3300,6 +3283,7 @@ pub fn parse_register(working_set: &mut StateWorkingSet, spans: &[Span]) -> Pipe
nu_engine::env::env_to_strings(working_set.permanent_state, &stack).unwrap_or_default();
let error = match signature {
Some(signature) => arguments.and_then(|(path, path_span)| {
let path = path.path_buf();
// restrict plugin file name starts with `nu_plugin_`
let valid_plugin_name = path
.file_name()
@ -3320,13 +3304,14 @@ pub fn parse_register(working_set: &mut StateWorkingSet, spans: &[Span]) -> Pipe
}
}),
None => arguments.and_then(|(path, path_span)| {
let path = path.path_buf();
// restrict plugin file name starts with `nu_plugin_`
let valid_plugin_name = path
.file_name()
.map(|s| s.to_string_lossy().starts_with("nu_plugin_"));
if let Some(true) = valid_plugin_name {
get_signature(path.as_path(), &shell, &current_envs)
get_signature(&path, &shell, &current_envs)
.map_err(|err| {
ParseError::LabeledError(
"Error getting signatures".into(),
@ -3393,28 +3378,52 @@ pub fn find_in_dirs(
working_set: &StateWorkingSet,
cwd: &str,
dirs_var_name: &str,
) -> Option<PathBuf> {
) -> Option<ParserPath> {
pub fn find_in_dirs_with_id(
filename: &str,
working_set: &StateWorkingSet,
cwd: &str,
dirs_var_name: &str,
) -> Option<PathBuf> {
) -> Option<ParserPath> {
// Choose whether to use file-relative or PWD-relative path
let actual_cwd = if let Some(currently_parsed_cwd) = &working_set.currently_parsed_cwd {
currently_parsed_cwd.as_path()
} else {
Path::new(cwd)
};
if let Ok(p) = canonicalize_with(filename, actual_cwd) {
return Some(p);
// Try if we have an existing virtual path
if let Some(virtual_path) = working_set.find_virtual_path(filename) {
return Some(ParserPath::from_virtual_path(
working_set,
filename,
virtual_path,
));
} else {
let abs_virtual_filename = actual_cwd.join(filename);
let abs_virtual_filename = abs_virtual_filename.to_string_lossy();
if let Some(virtual_path) = working_set.find_virtual_path(&abs_virtual_filename) {
return Some(ParserPath::from_virtual_path(
working_set,
&abs_virtual_filename,
virtual_path,
));
}
}
// Try if we have an existing physical path
if let Ok(p) = canonicalize_with(filename, actual_cwd) {
return Some(ParserPath::RealPath(p));
}
// Early-exit if path is non-existent absolute path
let path = Path::new(filename);
if !path.is_relative() {
return None;
}
// Look up relative path from NU_LIB_DIRS
working_set
.find_constant(find_dirs_var(working_set, dirs_var_name)?)?
.as_list()
@ -3427,9 +3436,11 @@ pub fn find_in_dirs(
})
.find(Option::is_some)
.flatten()
.map(ParserPath::RealPath)
}
// TODO: remove (see #8310)
// Same as find_in_dirs_with_id but using $env.NU_LIB_DIRS instead of constant
pub fn find_in_dirs_old(
filename: &str,
working_set: &StateWorkingSet,
@ -3475,8 +3486,9 @@ pub fn find_in_dirs(
}
}
find_in_dirs_with_id(filename, working_set, cwd, dirs_var_name)
.or_else(|| find_in_dirs_old(filename, working_set, cwd, dirs_var_name))
find_in_dirs_with_id(filename, working_set, cwd, dirs_var_name).or_else(|| {
find_in_dirs_old(filename, working_set, cwd, dirs_var_name).map(ParserPath::RealPath)
})
}
fn detect_params_in_name(

134
crates/nu-parser/src/parser_path.rs Normal file
View File

@ -0,0 +1,134 @@
use nu_protocol::engine::{StateWorkingSet, VirtualPath};
use std::ffi::OsStr;
use std::path::{Path, PathBuf};
/// An abstraction over a PathBuf that can have virtual paths (files and directories). Virtual
/// paths always exist and represent a way to ship Nushell code inside the binary without requiring
/// paths to be present in the file system.
///
/// Created from VirtualPath found in the engine state.
#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord)]
pub enum ParserPath {
RealPath(PathBuf),
VirtualFile(PathBuf, usize),
VirtualDir(PathBuf, Vec<ParserPath>),
}
impl ParserPath {
pub fn is_dir(&self) -> bool {
match self {
ParserPath::RealPath(p) => p.is_dir(),
ParserPath::VirtualFile(..) => false,
ParserPath::VirtualDir(..) => true,
}
}
pub fn is_file(&self) -> bool {
match self {
ParserPath::RealPath(p) => p.is_file(),
ParserPath::VirtualFile(..) => true,
ParserPath::VirtualDir(..) => false,
}
}
pub fn exists(&self) -> bool {
match self {
ParserPath::RealPath(p) => p.exists(),
ParserPath::VirtualFile(..) => true,
ParserPath::VirtualDir(..) => true,
}
}
pub fn path(&self) -> &Path {
match self {
ParserPath::RealPath(p) => p,
ParserPath::VirtualFile(p, _) => p,
ParserPath::VirtualDir(p, _) => p,
}
}
pub fn path_buf(self) -> PathBuf {
match self {
ParserPath::RealPath(p) => p,
ParserPath::VirtualFile(p, _) => p,
ParserPath::VirtualDir(p, _) => p,
}
}
pub fn parent(&self) -> Option<&Path> {
match self {
ParserPath::RealPath(p) => p.parent(),
ParserPath::VirtualFile(p, _) => p.parent(),
ParserPath::VirtualDir(p, _) => p.parent(),
}
}
pub fn read_dir(&self) -> Option<Vec<ParserPath>> {
match self {
ParserPath::RealPath(p) => p.read_dir().ok().map(|read_dir| {
read_dir
.flatten()
.map(|dir_entry| ParserPath::RealPath(dir_entry.path()))
.collect()
}),
ParserPath::VirtualFile(..) => None,
ParserPath::VirtualDir(_, files) => Some(files.clone()),
}
}
pub fn file_stem(&self) -> Option<&OsStr> {
self.path().file_stem()
}
pub fn extension(&self) -> Option<&OsStr> {
self.path().extension()
}
pub fn join(self, path: impl AsRef<Path>) -> ParserPath {
match self {
ParserPath::RealPath(p) => ParserPath::RealPath(p.join(path)),
ParserPath::VirtualFile(p, file_id) => ParserPath::VirtualFile(p.join(path), file_id),
ParserPath::VirtualDir(p, entries) => {
let new_p = p.join(path);
let mut pp = ParserPath::RealPath(new_p.clone());
for entry in entries {
if new_p == entry.path() {
pp = entry.clone();
}
}
pp
}
}
}
pub fn read<'a>(&'a self, working_set: &'a StateWorkingSet) -> Option<Vec<u8>> {
match self {
ParserPath::RealPath(p) => std::fs::read(p).ok(),
ParserPath::VirtualFile(_, file_id) => working_set
.get_contents_of_file(*file_id)
.map(|bytes| bytes.to_vec()),
ParserPath::VirtualDir(..) => None,
}
}
pub fn from_virtual_path(
working_set: &StateWorkingSet,
name: &str,
virtual_path: &VirtualPath,
) -> Self {
match virtual_path {
VirtualPath::File(file_id) => ParserPath::VirtualFile(PathBuf::from(name), *file_id),
VirtualPath::Dir(entries) => ParserPath::VirtualDir(
PathBuf::from(name),
entries
.iter()
.map(|virtual_path_id| {
let (virt_name, virt_path) = working_set.get_virtual_path(*virtual_path_id);
ParserPath::from_virtual_path(working_set, virt_name, virt_path)
})
.collect(),
),
}
}
}

118
crates/nu-protocol/src/engine/engine_state.rs
View File

@ -3,8 +3,8 @@ use lru::LruCache;
use super::{Command, EnvVars, OverlayFrame, ScopeFrame, Stack, Visibility, DEFAULT_OVERLAY_NAME};
use crate::{
ast::Block, BlockId, Config, DeclId, Example, Module, ModuleId, OverlayId, ShellError,
Signature, Span, Type, VarId, Variable,
ast::Block, BlockId, Config, DeclId, Example, FileId, Module, ModuleId, OverlayId, ShellError,
Signature, Span, Type, VarId, Variable, VirtualPathId,
};
use crate::{ParseError, Value};
use core::panic;
@ -56,6 +56,12 @@ impl Default for Usage {
}
}
#[derive(Clone, Debug)]
pub enum VirtualPath {
File(FileId),
Dir(Vec<VirtualPathId>),
}
/// The core global engine state. This includes all global definitions as well as any global state that
/// will persist for the whole session.
///
@ -102,6 +108,7 @@ impl Default for Usage {
pub struct EngineState {
files: Vec<(String, usize, usize)>,
file_contents: Vec<(Vec<u8>, usize, usize)>,
virtual_paths: Vec<(String, VirtualPath)>,
vars: Vec<Variable>,
decls: Vec<Box<dyn Command + 'static>>,
blocks: Vec<Block>,
@ -144,6 +151,7 @@ impl EngineState {
Self {
files: vec![],
file_contents: vec![],
virtual_paths: vec![],
vars: vec![
Variable::new(Span::new(0, 0), Type::Any, false),
Variable::new(Span::new(0, 0), Type::Any, false),
@ -196,6 +204,7 @@ impl EngineState {
// Take the mutable reference and extend the permanent state from the working set
self.files.extend(delta.files);
self.file_contents.extend(delta.file_contents);
self.virtual_paths.extend(delta.virtual_paths);
self.decls.extend(delta.decls);
self.vars.extend(delta.vars);
self.blocks.extend(delta.blocks);
@ -555,6 +564,10 @@ impl EngineState {
self.files.len()
}
pub fn num_virtual_paths(&self) -> usize {
self.virtual_paths.len()
}
pub fn num_vars(&self) -> usize {
self.vars.len()
}
@ -828,6 +841,12 @@ impl EngineState {
.expect("internal error: missing module")
}
pub fn get_virtual_path(&self, virtual_path_id: VirtualPathId) -> &(String, VirtualPath) {
self.virtual_paths
.get(virtual_path_id)
.expect("internal error: missing virtual path")
}
pub fn next_span_start(&self) -> usize {
if let Some((_, _, last)) = self.file_contents.last() {
*last
@ -840,29 +859,6 @@ impl EngineState {
self.files.iter()
}
pub fn get_filename(&self, file_id: usize) -> String {
for file in self.files.iter().enumerate() {
if file.0 == file_id {
return file.1 .0.clone();
}
}
"<unknown>".into()
}
pub fn get_file_source(&self, file_id: usize) -> String {
for file in self.files.iter().enumerate() {
if file.0 == file_id {
let contents = self.get_span_contents(&Span::new(file.1 .1, file.1 .2));
let output = String::from_utf8_lossy(contents).to_string();
return output;
}
}
"<unknown>".into()
}
pub fn add_file(&mut self, filename: String, contents: Vec<u8>) -> usize {
let next_span_start = self.next_span_start();
let next_span_end = next_span_start + contents.len();
@ -1011,6 +1007,7 @@ impl TypeScope {
pub struct StateDelta {
files: Vec<(String, usize, usize)>,
pub(crate) file_contents: Vec<(Vec<u8>, usize, usize)>,
virtual_paths: Vec<(String, VirtualPath)>,
vars: Vec<Variable>, // indexed by VarId
decls: Vec<Box<dyn Command>>, // indexed by DeclId
pub blocks: Vec<Block>, // indexed by BlockId
@ -1033,6 +1030,7 @@ impl StateDelta {
StateDelta {
files: vec![],
file_contents: vec![],
virtual_paths: vec![],
vars: vec![],
decls: vec![],
blocks: vec![],
@ -1048,6 +1046,10 @@ impl StateDelta {
self.files.len()
}
pub fn num_virtual_paths(&self) -> usize {
self.virtual_paths.len()
}
pub fn num_decls(&self) -> usize {
self.decls.len()
}
@ -1145,6 +1147,10 @@ impl<'a> StateWorkingSet<'a> {
self.delta.num_files() + self.permanent_state.num_files()
}
pub fn num_virtual_paths(&self) -> usize {
self.delta.num_virtual_paths() + self.permanent_state.num_virtual_paths()
}
pub fn num_decls(&self) -> usize {
self.delta.num_decls() + self.permanent_state.num_decls()
}
@ -1346,33 +1352,24 @@ impl<'a> StateWorkingSet<'a> {
self.permanent_state.files().chain(self.delta.files.iter())
}
pub fn get_filename(&self, file_id: usize) -> String {
for file in self.files().enumerate() {
if file.0 == file_id {
return file.1 .0.clone();
pub fn get_contents_of_file(&self, file_id: usize) -> Option<&[u8]> {
for (id, (contents, _, _)) in self.delta.file_contents.iter().enumerate() {
if self.permanent_state.num_files() + id == file_id {
return Some(contents);
}
}
"<unknown>".into()
}
pub fn get_file_source(&self, file_id: usize) -> String {
for file in self.files().enumerate() {
if file.0 == file_id {
let output = String::from_utf8_lossy(
self.get_span_contents(Span::new(file.1 .1, file.1 .2)),
)
.to_string();
return output;
for (id, (contents, _, _)) in self.permanent_state.file_contents.iter().enumerate() {
if id == file_id {
return Some(contents);
}
}
"<unknown>".into()
None
}
#[must_use]
pub fn add_file(&mut self, filename: String, contents: &[u8]) -> usize {
pub fn add_file(&mut self, filename: String, contents: &[u8]) -> FileId {
// First, look for the file to see if we already have it
for (idx, (fname, file_start, file_end)) in self.files().enumerate() {
if fname == &filename {
@ -1397,6 +1394,13 @@ impl<'a> StateWorkingSet<'a> {
self.num_files() - 1
}
#[must_use]
pub fn add_virtual_path(&mut self, name: String, virtual_path: VirtualPath) -> VirtualPathId {
self.delta.virtual_paths.push((name, virtual_path));
self.num_virtual_paths() - 1
}
pub fn get_span_for_file(&self, file_id: usize) -> Span {
let result = self
.files()
@ -2011,6 +2015,34 @@ impl<'a> StateWorkingSet<'a> {
None
}
pub fn find_virtual_path(&self, name: &str) -> Option<&VirtualPath> {
for (virtual_name, virtual_path) in self.delta.virtual_paths.iter().rev() {
if virtual_name == name {
return Some(virtual_path);
}
}
for (virtual_name, virtual_path) in self.permanent_state.virtual_paths.iter().rev() {
if virtual_name == name {
return Some(virtual_path);
}
}
None
}
pub fn get_virtual_path(&self, virtual_path_id: VirtualPathId) -> &(String, VirtualPath) {
let num_permanent_virtual_paths = self.permanent_state.num_virtual_paths();
if virtual_path_id < num_permanent_virtual_paths {
self.permanent_state.get_virtual_path(virtual_path_id)
} else {
self.delta
.virtual_paths
.get(virtual_path_id - num_permanent_virtual_paths)
.expect("internal error: missing virtual path")
}
}
}
impl Default for EngineState {

2
crates/nu-protocol/src/id.rs
View File

@ -3,3 +3,5 @@ pub type DeclId = usize;
pub type BlockId = usize;
pub type ModuleId = usize;
pub type OverlayId = usize;
pub type FileId = usize;
pub type VirtualPathId = usize;

1
crates/nu-std/Cargo.toml
View File

@ -11,3 +11,4 @@ version = "0.80.1"
miette = { version = "5.6.0", features = ["fancy-no-backtrace"] }
nu-parser = { version = "0.80.1", path = "../nu-parser" }
nu-protocol = { version = "0.80.1", path = "../nu-protocol" }
nu-engine = { version = "0.80.1", path = "../nu-engine" }

224
crates/nu-std/src/lib.rs
View File

@ -1,126 +1,136 @@
use nu_parser::{parse, parse_module_block};
use nu_protocol::report_error;
use nu_protocol::{engine::StateWorkingSet, Module, ShellError, Span};
use std::path::PathBuf;
fn add_file(
working_set: &mut StateWorkingSet,
name: &String,
content: &[u8],
) -> (Module, Vec<Span>) {
let file_id = working_set.add_file(name.clone(), content);
let new_span = working_set.get_span_for_file(file_id);
use nu_engine::{env::current_dir, eval_block};
use nu_parser::parse;
use nu_protocol::engine::{Stack, StateWorkingSet, VirtualPath};
use nu_protocol::{report_error, PipelineData};
let (_, module, comments) = parse_module_block(working_set, new_span, name.as_bytes());
if let Some(err) = working_set.parse_errors.first() {
report_error(working_set, err);
}
parse(working_set, Some(name), content, true);
if let Some(err) = working_set.parse_errors.first() {
report_error(working_set, err);
}
(module, comments)
}
fn load_prelude(working_set: &mut StateWorkingSet, prelude: Vec<(&str, &str)>, module: &Module) {
let mut decls = Vec::new();
let mut errs = Vec::new();
for (name, search_name) in prelude {
if let Some(id) = module.decls.get(&search_name.as_bytes().to_vec()) {
let decl = (name.as_bytes().to_vec(), id.to_owned());
decls.push(decl);
} else {
errs.push(ShellError::GenericError(
format!("could not load `{}` from `std`.", search_name),
String::new(),
None,
None,
Vec::new(),
));
}
}
if !errs.is_empty() {
report_error(
working_set,
&ShellError::GenericError(
"Unable to load the prelude of the standard library.".into(),
String::new(),
None,
Some("this is a bug: please file an issue in the [issue tracker](https://github.com/nushell/nushell/issues/new/choose)".to_string()),
errs,
),
);
}
working_set.use_decls(decls);
}
// Virtual std directory unlikely to appear in user's file system
const NU_STDLIB_VIRTUAL_DIR: &str = "NU_STDLIB_VIRTUAL_DIR";
pub fn load_standard_library(
engine_state: &mut nu_protocol::engine::EngineState,
) -> Result<(), miette::ErrReport> {
let delta = {
let name = "std".to_string();
let content = include_str!("../lib/mod.nu");
// these modules are loaded in the order they appear in this list
#[rustfmt::skip]
let submodules = vec![
// helper modules that could be used in other parts of the library
("log", include_str!("../lib/log.nu")),
// the rest of the library
("dirs", include_str!("../lib/dirs.nu")),
("iter", include_str!("../lib/iter.nu")),
("help", include_str!("../lib/help.nu")),
("testing", include_str!("../lib/testing.nu")),
("xml", include_str!("../lib/xml.nu")),
("dt", include_str!("../lib/dt.nu")),
];
// Define commands to be preloaded into the default (top level, unprefixed) namespace.
// User can invoke these without having to `use std` beforehand.
// Entries are: (name to add to default namespace, path under std to find implementation)
//
// Conventionally, for a command implemented as `std foo`, the name added
// is either `std foo` or bare `foo`, not some arbitrary rename.
#[rustfmt::skip]
let prelude = vec![
("std help", "help"),
("std help commands", "help commands"),
("std help aliases", "help aliases"),
("std help modules", "help modules"),
("std help externs", "help externs"),
("std help operators", "help operators"),
("enter", "dirs enter"),
("shells", "dirs shells"),
("g", "dirs g"),
("n", "dirs n"),
("p", "dirs p"),
("dexit", "dirs dexit"),
let (block, delta) = {
let mut std_files = vec![
(
PathBuf::from(NU_STDLIB_VIRTUAL_DIR)
.join("std")
.join("mod.nu"),
include_str!("../std/mod.nu"),
),
(
PathBuf::from(NU_STDLIB_VIRTUAL_DIR)
.join("std")
.join("dirs.nu"),
include_str!("../std/dirs.nu"),
),
(
PathBuf::from(NU_STDLIB_VIRTUAL_DIR)
.join("std")
.join("dt.nu"),
include_str!("../std/dt.nu"),
),
(
PathBuf::from(NU_STDLIB_VIRTUAL_DIR)
.join("std")
.join("help.nu"),
include_str!("../std/help.nu"),
),
(
PathBuf::from(NU_STDLIB_VIRTUAL_DIR)
.join("std")
.join("iter.nu"),
include_str!("../std/iter.nu"),
),
(
PathBuf::from(NU_STDLIB_VIRTUAL_DIR)
.join("std")
.join("log.nu"),
include_str!("../std/log.nu"),
),
(
PathBuf::from(NU_STDLIB_VIRTUAL_DIR)
.join("std")
.join("testing.nu"),
include_str!("../std/testing.nu"),
),
(
PathBuf::from(NU_STDLIB_VIRTUAL_DIR)
.join("std")
.join("xml.nu"),
include_str!("../std/xml.nu"),
),
];
let mut working_set = StateWorkingSet::new(engine_state);
let mut std_virt_paths = vec![];
for (name, content) in submodules {
let (module, comments) =
add_file(&mut working_set, &name.to_string(), content.as_bytes());
working_set.add_module(name, module, comments);
for (name, content) in std_files.drain(..) {
let file_id =
working_set.add_file(name.to_string_lossy().to_string(), content.as_bytes());
let virtual_file_id = working_set.add_virtual_path(
name.to_string_lossy().to_string(),
VirtualPath::File(file_id),
);
std_virt_paths.push(virtual_file_id);
}
let (module, comments) = add_file(&mut working_set, &name, content.as_bytes());
load_prelude(&mut working_set, prelude, &module);
working_set.add_module(&name, module, comments);
// Using full virtual path to avoid potential conflicts with user having 'std' directory
// in their working directory.
let std_dir = PathBuf::from(NU_STDLIB_VIRTUAL_DIR)
.join("std")
.to_string_lossy()
.to_string();
let source = format!(
r#"
# Define the `std` module
module {std_dir}
working_set.render()
# Prelude
use std dirs [ enter, shells, g, n, p, dexit ]
"#
);
let _ = working_set.add_virtual_path(std_dir, VirtualPath::Dir(std_virt_paths));
// Change the currently parsed directory
let prev_currently_parsed_cwd = working_set.currently_parsed_cwd.clone();
working_set.currently_parsed_cwd = Some(PathBuf::from(NU_STDLIB_VIRTUAL_DIR));
let block = parse(
&mut working_set,
Some("loading stdlib"),
source.as_bytes(),
false,
);
if let Some(err) = working_set.parse_errors.first() {
report_error(&working_set, err);
}
// Restore the currently parsed directory back
working_set.currently_parsed_cwd = prev_currently_parsed_cwd;
(block, working_set.render())
};
engine_state.merge_delta(delta)?;
// We need to evaluate the module in order to run the `export-env` blocks.
let mut stack = Stack::new();
let pipeline_data = PipelineData::Empty;
eval_block(
engine_state,
&mut stack,
&block,
pipeline_data,
false,
false,
)?;
let cwd = current_dir(engine_state, &stack)?;
engine_state.merge_env(&mut stack, cwd)?;
Ok(())
}

0
crates/nu-std/lib/dirs.nu → crates/nu-std/std/dirs.nu
View File

0
crates/nu-std/lib/dt.nu → crates/nu-std/std/dt.nu
View File

0
crates/nu-std/lib/help.nu → crates/nu-std/std/help.nu
View File

0
crates/nu-std/lib/iter.nu → crates/nu-std/std/iter.nu
View File

0
crates/nu-std/lib/log.nu → crates/nu-std/std/log.nu
View File

15
crates/nu-std/lib/mod.nu → crates/nu-std/std/mod.nu
View File

@ -1,15 +1,12 @@
# std.nu, `used` to load all standard library components
export use dirs
export-env {
use dirs *
use dirs.nu []
}
export use help
export use iter
export use log
export use testing *
export use xml
use dt [datetime-diff, pretty-print-duration]
export use testing.nu *
use dt.nu [datetime-diff, pretty-print-duration]
# Add the given paths to the PATH.
#
@ -46,7 +43,7 @@ export def-env "path add" [
| if $append { append $paths }
else { prepend $paths }
)
if $ret {
$env | get $path_name
}

16
crates/nu-std/lib/testing.nu → crates/nu-std/std/testing.nu
View File

@ -5,7 +5,7 @@
# Assert commands and test runner.
#
##################################################################################
use log
export use log.nu
# Universal assert command
#
@ -17,7 +17,7 @@ use log
# >_ assert (3 == 3)
# >_ assert (42 == 3)
# Error:
# × Assertion failed:
# × Assertion failed:
# ╭─[myscript.nu:11:1]
# 11 │ assert (3 == 3)
# 12 │ assert (42 == 3)
@ -38,7 +38,7 @@ use log
# }
# ```
export def assert [
condition: bool, # Condition, which should be true
condition: bool, # Condition, which should be true
message?: string, # Optional error message
--error-label: record # Label for `error make` if you want to create a custom assert
] {
@ -64,7 +64,7 @@ export def assert [
# >_ assert (42 == 3)
# >_ assert (3 == 3)
# Error:
# × Assertion failed:
# × Assertion failed:
# ╭─[myscript.nu:11:1]
# 11 │ assert (42 == 3)
# 12 │ assert (3 == 3)
@ -73,7 +73,7 @@ export def assert [
# 13 │
# ╰────
#
#
#
# The --error-label flag can be used if you want to create a custom assert command:
# ```
# def "assert not even" [number: int] {
@ -86,7 +86,7 @@ export def assert [
# ```
#
export def "assert not" [
condition: bool, # Condition, which should be false
condition: bool, # Condition, which should be false
message?: string, # Optional error message
--error-label: record # Label for `error make` if you want to create a custom assert
] {
@ -106,7 +106,7 @@ export def "assert not" [
# Assert that executing the code generates an error
#
# For more documentation see the assert command
#
#
# # Examples
#
# > assert error {|| missing_command} # passes
@ -138,7 +138,7 @@ export def "assert skip" [] {
# For more documentation see the assert command
#
# # Examples
#
#
# > assert equal 1 1 # passes
# > assert equal (0.1 + 0.2) 0.3
# > assert equal 1 2 # fails

0
crates/nu-std/lib/xml.nu → crates/nu-std/std/xml.nu
View File

27
crates/nu-std/tests/test_dirs.nu
View File

@ -3,8 +3,7 @@ use std "assert length"
use std "assert equal"
use std "assert not equal"
use std "assert error"
use std "log info"
use std "log debug"
use std log
# A couple of nuances to understand when testing module that exports environment:
# Each 'use' for that module in the test script will execute the export def-env block.
@ -41,20 +40,15 @@ def cur_ring_check [expect_dir:string, expect_position: int scenario:string] {
export def test_dirs_command [] {
# careful with order of these statements!
# must capture value of $in before executing `use`s
let $c = $in
let $c = $in
# must set PWD *before* doing `use` that will run the export def-env block in dirs module.
cd $c.base_path
# must execute these uses for the UOT commands *after* the test and *not* just put them at top of test module.
# the export def-env gets messed up
use std "dirs next"
use std "dirs prev"
use std "dirs add"
use std "dirs drop"
use std "dirs show"
use std "dirs goto"
use std dirs
assert equal [$c.base_path] $env.DIRS_LIST "list is just pwd after initialization"
dirs next
@ -85,13 +79,12 @@ export def test_dirs_command [] {
export def test_dirs_next [] {
# must capture value of $in before executing `use`s
let $c = $in
let $c = $in
# must set PWD *before* doing `use` that will run the export def-env block in dirs module.
cd $c.base_path
assert equal $env.PWD $c.base_path "test setup"
use std "dirs next"
use std "dirs add"
use std dirs
cur_dir_check $c.base_path "use module test setup"
dirs add $c.path_a $c.path_b
@ -107,15 +100,11 @@ export def test_dirs_next [] {
export def test_dirs_cd [] {
# must capture value of $in before executing `use`s
let $c = $in
let $c = $in
# must set PWD *before* doing `use` that will run the export def-env block in dirs module.
cd $c.base_path
use std # necessary to define $env.config??
use std "dirs next"
use std "dirs add"
use std "dirs drop"
use std dirs
cur_dir_check $c.base_path "use module test setup"

24
src/main.rs
View File

@ -152,6 +152,18 @@ fn main() -> Result<()> {
engine_state.add_env_var("NU_LIB_DIRS".into(), Value::List { vals, span });
}
start_time = std::time::Instant::now();
// First, set up env vars as strings only
gather_parent_env_vars(&mut engine_state, &init_cwd);
perf(
"gather env vars",
start_time,
file!(),
line!(),
column!(),
use_color,
);
if parsed_nu_cli_args.no_std_lib.is_none() {
load_standard_library(&mut engine_state)?;
}
@ -243,18 +255,6 @@ fn main() -> Result<()> {
use_color,
);
start_time = std::time::Instant::now();
// First, set up env vars as strings only
gather_parent_env_vars(&mut engine_state, &init_cwd);
perf(
"gather env vars",
start_time,
file!(),
line!(),
column!(),
use_color,
);
if let Some(commands) = parsed_nu_cli_args.commands.clone() {
run_commands(
&mut engine_state,

7
src/tests/test_stdlib.rs
View File

@ -2,15 +2,12 @@ use crate::tests::{fail_test, run_test_std, TestResult};
#[test]
fn library_loaded() -> TestResult {
run_test_std(
"help std | lines | first 1 | to text",
"std.nu, `used` to load all standard library components",
)
run_test_std("$nu.scope.modules | where name == 'std' | length", "1")
}
#[test]
fn prelude_loaded() -> TestResult {
run_test_std("std help commands | where name == open | length", "1")
run_test_std("shells | length", "1")
}
#[test]