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stdlib: make the library a standalone crate (nushell#8770)
# Description as we now have a prelude thanks to nushell#8627, i'd like to work on the structure of the library 😋 and i think the first step is to make it a true standalone crate 😏 this PR - moves all the library from `crates/nu-utils/standard_library/` to `crates/nu-std/` - moves the `rust` loading code from `src/run.rs` to `crates/nu-std/src/lib.rs`
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[package] | ||
authors = ["The Nushell Project Developers"] | ||
description = "The standard library of Nushell" | ||
repository = "https://github.com/nushell/nushell/tree/main/crates/nu-std" | ||
edition = "2021" | ||
license = "MIT" | ||
name = "nu-std" | ||
version = "0.78.1" | ||
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[dependencies] | ||
miette = { version = "5.6.0", features = ["fancy-no-backtrace"] } | ||
nu-cli = { version = "0.78.1", path = "../nu-cli" } | ||
nu-parser = { version = "0.78.1", path = "../nu-parser" } | ||
nu-protocol = { version = "0.78.1", path = "../nu-protocol" } |
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use nu_cli::report_error; | ||
use nu_parser::{parse, parse_module_block}; | ||
use nu_protocol::{engine::StateWorkingSet, Module, ShellError, Span}; | ||
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fn get_standard_library() -> &'static str { | ||
include_str!("../std.nu") | ||
} | ||
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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(), | ||
)); | ||
} | ||
} | ||
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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, | ||
), | ||
); | ||
} | ||
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working_set.use_decls(decls); | ||
} | ||
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pub fn load_standard_library( | ||
engine_state: &mut nu_protocol::engine::EngineState, | ||
) -> Result<(), miette::ErrReport> { | ||
let delta = { | ||
let name = "std".to_string(); | ||
let content = get_standard_library().as_bytes(); | ||
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let mut working_set = StateWorkingSet::new(engine_state); | ||
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let start = working_set.next_span_start(); | ||
working_set.add_file(name.clone(), content); | ||
let end = working_set.next_span_start(); | ||
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let (_, module, comments) = | ||
parse_module_block(&mut working_set, Span::new(start, end), name.as_bytes()); | ||
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if let Some(err) = working_set.parse_errors.first() { | ||
report_error(&working_set, err); | ||
} | ||
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parse(&mut working_set, Some(&name), content, true); | ||
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if let Some(err) = working_set.parse_errors.first() { | ||
report_error(&working_set, err); | ||
} | ||
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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"), | ||
]; | ||
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load_prelude(&mut working_set, prelude, &module); | ||
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working_set.add_module(&name, module, comments); | ||
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working_set.render() | ||
}; | ||
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engine_state.merge_delta(delta)?; | ||
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Ok(()) | ||
} |
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