1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
|
//! This module implements the builtins exposed in the Nix language.
//!
//! See //tvix/eval/docs/builtins.md for a some context on the
//! available builtins in Nix.
use std::{
collections::{BTreeMap, HashMap},
rc::Rc,
};
use crate::{
errors::ErrorKind,
value::{Builtin, NixAttrs, NixList, NixString, Value},
};
use crate::arithmetic_op;
fn pure_builtins() -> Vec<Builtin> {
vec![
Builtin::new("add", 2, |mut args, _| {
let b = args.pop().unwrap();
let a = args.pop().unwrap();
arithmetic_op!(a, b, +)
}),
Builtin::new("abort", 1, |mut args, _| {
return Err(ErrorKind::Abort(
args.pop().unwrap().to_string()?.as_str().to_owned(),
));
}),
Builtin::new("catAttrs", 2, |mut args, _| {
let list = args.pop().unwrap().to_list()?;
let key = args.pop().unwrap().to_string()?;
let mut output = vec![];
for set in list.into_iter() {
if let Some(value) = set.to_attrs()?.select(key.as_str()) {
output.push(value.clone());
}
}
Ok(Value::List(NixList::construct(output.len(), output)))
}),
Builtin::new("div", 2, |mut args, _| {
let b = args.pop().unwrap();
let a = args.pop().unwrap();
arithmetic_op!(a, b, /)
}),
Builtin::new("length", 1, |args, _| {
Ok(Value::Integer(args[0].as_list()?.len() as i64))
}),
Builtin::new("isAttrs", 1, |args, _| {
Ok(Value::Bool(matches!(args[0], Value::Attrs(_))))
}),
Builtin::new("isBool", 1, |args, _| {
Ok(Value::Bool(matches!(args[0], Value::Bool(_))))
}),
Builtin::new("isFloat", 1, |args, _| {
Ok(Value::Bool(matches!(args[0], Value::Float(_))))
}),
Builtin::new("isFunction", 1, |args, _| {
Ok(Value::Bool(matches!(
args[0],
Value::Closure(_) | Value::Builtin(_)
)))
}),
Builtin::new("isInt", 1, |args, _| {
Ok(Value::Bool(matches!(args[0], Value::Integer(_))))
}),
Builtin::new("isList", 1, |args, _| {
Ok(Value::Bool(matches!(args[0], Value::List(_))))
}),
Builtin::new("isNull", 1, |args, _| {
Ok(Value::Bool(matches!(args[0], Value::Null)))
}),
Builtin::new("isPath", 1, |args, _| {
Ok(Value::Bool(matches!(args[0], Value::Path(_))))
}),
Builtin::new("isString", 1, |args, _| {
Ok(Value::Bool(matches!(args[0], Value::String(_))))
}),
Builtin::new("mul", 2, |mut args, _| {
let b = args.pop().unwrap();
let a = args.pop().unwrap();
arithmetic_op!(a, b, *)
}),
Builtin::new("sub", 2, |mut args, _| {
let b = args.pop().unwrap();
let a = args.pop().unwrap();
arithmetic_op!(a, b, -)
}),
Builtin::new("throw", 1, |mut args, _| {
return Err(ErrorKind::Throw(
args.pop().unwrap().to_string()?.as_str().to_owned(),
));
}),
Builtin::new("toString", 1, |args, _| {
// TODO: toString is actually not the same as Display
Ok(Value::String(format!("{}", args[0]).into()))
}),
Builtin::new("typeOf", 1, |args, _| {
Ok(Value::String(args[0].type_of().into()))
}),
]
}
fn builtins_set() -> NixAttrs {
let mut map: BTreeMap<NixString, Value> = BTreeMap::new();
for builtin in pure_builtins() {
map.insert(builtin.name().into(), Value::Builtin(builtin));
}
NixAttrs::from_map(map)
}
/// Set of Nix builtins that are globally available.
pub fn global_builtins() -> HashMap<&'static str, Value> {
let builtins = builtins_set();
let mut globals: HashMap<&'static str, Value> = HashMap::new();
// known global builtins from the builtins set.
for global in &[
"abort",
"baseNameOf",
"derivation",
"derivationStrict",
"dirOf",
"fetchGit",
"fetchMercurial",
"fetchTarball",
"fromTOML",
"import",
"isNull",
"map",
"placeholder",
"removeAttrs",
"scopedImport",
"throw",
"toString",
] {
if let Some(builtin) = builtins.select(global) {
globals.insert(global, builtin.clone());
}
}
globals.insert("builtins", Value::Attrs(Rc::new(builtins)));
globals
}
|
