-
-
Notifications
You must be signed in to change notification settings - Fork 35.2k
Expand file tree
/
Copy pathnode_dotenv.cc
More file actions
363 lines (309 loc) · 11.2 KB
/
node_dotenv.cc
File metadata and controls
363 lines (309 loc) · 11.2 KB
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
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
#include "node_dotenv.h"
#include <unordered_set>
#include "env-inl.h"
#include "node_file.h"
#include "uv.h"
namespace node {
using v8::EscapableHandleScope;
using v8::JustVoid;
using v8::Local;
using v8::LocalVector;
using v8::Maybe;
using v8::MaybeLocal;
using v8::Name;
using v8::Nothing;
using v8::Object;
using v8::String;
using v8::Value;
std::vector<Dotenv::env_file_data> Dotenv::GetDataFromArgs(
const std::vector<std::string>& args) {
const std::string_view optional_env_file_flag = "--env-file-if-exists";
const auto find_match = [](const std::string& arg) {
return arg == "--" || arg == "--env-file" ||
arg.starts_with("--env-file=") || arg == "--env-file-if-exists" ||
arg.starts_with("--env-file-if-exists=");
};
std::vector<Dotenv::env_file_data> env_files;
// This will be an iterator, pointing to args.end() if no matches are found
auto matched_arg = std::ranges::find_if(args, find_match);
while (matched_arg != args.end()) {
if (*matched_arg == "--") {
return env_files;
}
auto equal_char_index = matched_arg->find('=');
if (equal_char_index != std::string::npos) {
// `--env-file=path`
auto flag = matched_arg->substr(0, equal_char_index);
auto file_path = matched_arg->substr(equal_char_index + 1);
struct env_file_data env_file_data = {
file_path, flag.starts_with(optional_env_file_flag)};
env_files.push_back(env_file_data);
} else {
// `--env-file path`
auto file_path = std::next(matched_arg);
if (file_path == args.end()) {
return env_files;
}
struct env_file_data env_file_data = {
*file_path, matched_arg->starts_with(optional_env_file_flag)};
env_files.push_back(env_file_data);
}
matched_arg = std::find_if(++matched_arg, args.end(), find_match);
}
return env_files;
}
Maybe<void> Dotenv::SetEnvironment(node::Environment* env) {
auto context = env->context();
auto env_vars = env->env_vars();
for (const auto& entry : store_) {
auto existing = env_vars->Get(entry.first.data());
if (!existing.has_value()) {
Local<Value> name;
Local<Value> val;
if (!ToV8Value(context, entry.first).ToLocal(&name) ||
!ToV8Value(context, entry.second).ToLocal(&val)) {
return Nothing<void>();
}
env_vars->Set(env->isolate(), name.As<String>(), val.As<String>());
}
}
return JustVoid();
}
MaybeLocal<Object> Dotenv::ToObject(Environment* env) const {
EscapableHandleScope scope(env->isolate());
LocalVector<Name> names(env->isolate(), store_.size());
LocalVector<Value> values(env->isolate(), store_.size());
auto context = env->context();
Local<Value> tmp;
int n = 0;
for (const auto& entry : store_) {
if (!ToV8Value(context, entry.first).ToLocal(&tmp)) {
return MaybeLocal<Object>();
}
names[n] = tmp.As<Name>();
if (!ToV8Value(context, entry.second).ToLocal(&tmp)) {
return MaybeLocal<Object>();
}
values[n++] = tmp;
}
Local<Object> result = Object::New(env->isolate(),
Null(env->isolate()),
names.data(),
values.data(),
values.size());
return scope.Escape(result);
}
// Removes leading and trailing spaces from a string_view.
// Returns an empty string_view if the input is empty.
// Example:
// trim_spaces(" hello ") -> "hello"
// trim_spaces("") -> ""
std::string_view trim_spaces(std::string_view input) {
if (input.empty()) return "";
auto pos_start = input.find_first_not_of(" \t\n");
if (pos_start == std::string_view::npos) {
return "";
}
auto pos_end = input.find_last_not_of(" \t\n");
if (pos_end == std::string_view::npos) {
return input.substr(pos_start);
}
return input.substr(pos_start, pos_end - pos_start + 1);
}
void Dotenv::ParseContent(const std::string_view input) {
std::string lines(input);
// Handle windows newlines "\r\n": remove "\r" and keep only "\n"
lines.erase(std::remove(lines.begin(), lines.end(), '\r'), lines.end());
std::string_view content = lines;
content = trim_spaces(content);
std::string_view key;
std::string_view value;
while (!content.empty()) {
// Skip empty lines and comments
if (content.front() == '\n' || content.front() == '#') {
// Check if the first character of the content is a newline or a hash
auto newline = content.find('\n');
if (newline != std::string_view::npos) {
// Remove everything up to and including the newline character
content.remove_prefix(newline + 1);
} else {
// If no newline is found, clear the content
content = {};
}
// Skip the remaining code in the loop and continue with the next
// iteration.
continue;
}
// Find the next equals sign or newline in a single pass.
// This optimizes the search by avoiding multiple iterations.
auto equal_or_newline = content.find_first_of("=\n");
// If we found nothing or found a newline before equals, the line is invalid
if (equal_or_newline == std::string_view::npos ||
content.at(equal_or_newline) == '\n') {
if (equal_or_newline != std::string_view::npos) {
content.remove_prefix(equal_or_newline + 1);
content = trim_spaces(content);
continue;
}
break;
}
// We found an equals sign, extract the key
key = content.substr(0, equal_or_newline);
content.remove_prefix(equal_or_newline + 1);
key = trim_spaces(key);
// If the value is not present (e.g. KEY=) set it to an empty string
if (content.empty() || content.front() == '\n') {
store_.insert_or_assign(std::string(key), "");
continue;
}
content = trim_spaces(content);
// Skip lines with empty keys after trimming spaces.
// Examples of invalid keys that would be skipped:
// =value
// " "=value
if (key.empty()) continue;
// Remove export prefix from key and ensure proper spacing.
// Example: export FOO=bar -> FOO=bar
if (key.starts_with("export ")) {
key.remove_prefix(7);
// Trim spaces after removing export prefix to handle cases like:
// export FOO=bar
key = trim_spaces(key);
}
// SAFETY: Content is guaranteed to have at least one character
if (content.empty()) {
// In case the last line is a single key without value
// Example: KEY= (without a newline at the EOF)
store_.insert_or_assign(std::string(key), "");
break;
}
// Expand new line if \n it's inside double quotes
// Example: EXPAND_NEWLINES = 'expand\nnew\nlines'
if (content.front() == '"') {
auto closing_quote = content.find(content.front(), 1);
if (closing_quote != std::string_view::npos) {
value = content.substr(1, closing_quote - 1);
std::string multi_line_value = std::string(value);
// Replace \n with actual newlines in double-quoted strings
size_t pos = 0;
while ((pos = multi_line_value.find("\\n", pos)) !=
std::string_view::npos) {
multi_line_value.replace(pos, 2, "\n");
pos += 1;
}
store_.insert_or_assign(std::string(key), multi_line_value);
auto newline = content.find('\n', closing_quote + 1);
if (newline != std::string_view::npos) {
content.remove_prefix(newline + 1);
} else {
// In case the last line is a single key/value pair
// Example: KEY=VALUE (without a newline at the EOF
content = {};
}
continue;
}
}
// Handle quoted values (single quotes, double quotes, backticks)
if (content.front() == '\'' || content.front() == '"' ||
content.front() == '`') {
auto closing_quote = content.find(content.front(), 1);
// Check if the closing quote is not found
// Example: KEY="value
if (closing_quote == std::string_view::npos) {
// Check if newline exist. If it does, take the entire line as the value
// Example: KEY="value\nKEY2=value2
// The value pair should be `"value`
auto newline = content.find('\n');
if (newline != std::string_view::npos) {
value = content.substr(0, newline);
store_.insert_or_assign(std::string(key), value);
content.remove_prefix(newline + 1);
} else {
// No newline - take rest of content
value = content;
store_.insert_or_assign(std::string(key), value);
break;
}
} else {
// Found closing quote - take content between quotes
value = content.substr(1, closing_quote - 1);
store_.insert_or_assign(std::string(key), value);
auto newline = content.find('\n', closing_quote + 1);
if (newline != std::string_view::npos) {
// Use +1 to discard the '\n' itself => next line
content.remove_prefix(newline + 1);
} else {
content = {};
}
// No valid data here, skip to next line
continue;
}
} else {
// Regular key value pair.
// Example: `KEY=this is value`
auto newline = content.find('\n');
if (newline != std::string_view::npos) {
value = content.substr(0, newline);
auto hash_character = value.find('#');
// Check if there is a comment in the line
// Example: KEY=value # comment
// The value pair should be `value`
if (hash_character != std::string_view::npos) {
value = value.substr(0, hash_character);
}
value = trim_spaces(value);
store_.insert_or_assign(std::string(key), std::string(value));
content.remove_prefix(newline + 1);
} else {
// Last line without newline
value = content;
auto hash_char = value.find('#');
if (hash_char != std::string_view::npos) {
value = content.substr(0, hash_char);
}
store_.insert_or_assign(std::string(key), trim_spaces(value));
content = {};
}
}
content = trim_spaces(content);
}
}
Dotenv::ParseResult Dotenv::ParsePath(const std::string_view path) {
uv_fs_t req;
auto defer_req_cleanup = OnScopeLeave([&req]() { uv_fs_req_cleanup(&req); });
uv_file file = uv_fs_open(nullptr, &req, path.data(), 0, 438, nullptr);
if (req.result < 0) {
// req will be cleaned up by scope leave.
return ParseResult::FileError;
}
uv_fs_req_cleanup(&req);
auto defer_close = OnScopeLeave([file]() {
uv_fs_t close_req;
CHECK_EQ(0, uv_fs_close(nullptr, &close_req, file, nullptr));
uv_fs_req_cleanup(&close_req);
});
std::string result{};
char buffer[8192];
uv_buf_t buf = uv_buf_init(buffer, sizeof(buffer));
while (true) {
auto r = uv_fs_read(nullptr, &req, file, &buf, 1, -1, nullptr);
if (req.result < 0) {
// req will be cleaned up by scope leave.
return ParseResult::InvalidContent;
}
uv_fs_req_cleanup(&req);
if (r <= 0) {
break;
}
result.append(buf.base, r);
}
ParseContent(result);
return ParseResult::Valid;
}
void Dotenv::AssignNodeOptionsIfAvailable(std::string* node_options) const {
auto match = store_.find("NODE_OPTIONS");
if (match != store_.end()) {
*node_options = match->second;
}
}
} // namespace node