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
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
use crate::NodeModuleKind;
use super::RequireNpmResolver;use deno_core::anyhow;use deno_core::anyhow::bail;use deno_core::error::AnyError;use deno_core::serde_json;use deno_core::serde_json::Map;use deno_core::serde_json::Value;use serde::Serialize;use std::io::ErrorKind;use std::path::PathBuf;
#[derive(Clone, Debug, Serialize)]pub struct PackageJson {  pub exists: bool,  pub exports: Option<Map<String, Value>>,  pub imports: Option<Map<String, Value>>,  pub bin: Option<Value>,  main: Option<String>,   // use .main(...)  module: Option<String>, // use .main(...)  pub name: Option<String>,  pub version: Option<String>,  pub path: PathBuf,  pub typ: String,  pub types: Option<String>,}
impl PackageJson {  pub fn empty(path: PathBuf) -> PackageJson {    PackageJson {      exists: false,      exports: None,      imports: None,      bin: None,      main: None,      module: None,      name: None,      version: None,      path,      typ: "none".to_string(),      types: None,    }  }
  pub fn load(    resolver: &dyn RequireNpmResolver,    path: PathBuf,  ) -> Result<PackageJson, AnyError> {    resolver.ensure_read_permission(&path)?;    Self::load_skip_read_permission(path)  }
  pub fn load_skip_read_permission(    path: PathBuf,  ) -> Result<PackageJson, AnyError> {    let source = match std::fs::read_to_string(&path) {      Ok(source) => source,      Err(err) if err.kind() == ErrorKind::NotFound => {        return Ok(PackageJson::empty(path));      }      Err(err) => bail!(        "Error loading package.json at {}. {:#}",        path.display(),        err      ),    };
    if source.trim().is_empty() {      return Ok(PackageJson::empty(path));    }
    let package_json: Value = serde_json::from_str(&source)      .map_err(|err| anyhow::anyhow!("malformed package.json {}", err))?;
    let imports_val = package_json.get("imports");    let main_val = package_json.get("main");    let module_val = package_json.get("module");    let name_val = package_json.get("name");    let version_val = package_json.get("version");    let type_val = package_json.get("type");    let bin = package_json.get("bin").map(ToOwned::to_owned);    let exports = package_json.get("exports").map(|exports| {      if is_conditional_exports_main_sugar(exports) {        let mut map = Map::new();        map.insert(".".to_string(), exports.to_owned());        map      } else {        exports.as_object().unwrap().to_owned()      }    });
    let imports = imports_val      .and_then(|imp| imp.as_object())      .map(|imp| imp.to_owned());    let main = main_val.and_then(|s| s.as_str()).map(|s| s.to_string());    let name = name_val.and_then(|s| s.as_str()).map(|s| s.to_string());    let version = version_val.and_then(|s| s.as_str()).map(|s| s.to_string());    let module = module_val.and_then(|s| s.as_str()).map(|s| s.to_string());
    // Ignore unknown types for forwards compatibility    let typ = if let Some(t) = type_val {      if let Some(t) = t.as_str() {        if t != "module" && t != "commonjs" {          "none".to_string()        } else {          t.to_string()        }      } else {        "none".to_string()      }    } else {      "none".to_string()    };
    // for typescript, it looks for "typings" first, then "types"    let types = package_json      .get("typings")      .or_else(|| package_json.get("types"))      .and_then(|t| t.as_str().map(|s| s.to_string()));
    let package_json = PackageJson {      exists: true,      path,      main,      name,      version,      module,      typ,      types,      exports,      imports,      bin,    };    Ok(package_json)  }
  pub fn main(&self, referrer_kind: NodeModuleKind) -> Option<&String> {    if referrer_kind == NodeModuleKind::Esm && self.typ == "module" {      self.module.as_ref().or(self.main.as_ref())    } else {      self.main.as_ref()    }  }}
fn is_conditional_exports_main_sugar(exports: &Value) -> bool {  if exports.is_string() || exports.is_array() {    return true;  }
  if exports.is_null() || !exports.is_object() {    return false;  }
  let exports_obj = exports.as_object().unwrap();  let mut is_conditional_sugar = false;  let mut i = 0;  for key in exports_obj.keys() {    let cur_is_conditional_sugar = key.is_empty() || !key.starts_with('.');    if i == 0 {      is_conditional_sugar = cur_is_conditional_sugar;      i += 1;    } else if is_conditional_sugar != cur_is_conditional_sugar {      panic!("\"exports\" cannot contains some keys starting with \'.\' and some not.        The exports object must either be an object of package subpath keys        or an object of main entry condition name keys only.")    }  }
  is_conditional_sugar}