Repository navigation
Expand file tree
/
Copy pathParser.php
More file actions
190 lines (167 loc) · 4.89 KB
/
Copy pathParser.php
File metadata and controls
190 lines (167 loc) · 4.89 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
<?php
namespace Dotenv;
use Dotenv\Exception\InvalidFileException;
class Parser
{
/**
* Parse the given environment variable entry into a name and value.
*
* Takes value as passed in by developer and:
* - breaks up the line into a name and value,
* - cleaning the value of quotes,
* - cleaning the name of quotes.
*
* @param string $entry
*
* @throws \Dotenv\Exception\InvalidFileException
*
* @return array
*/
public static function parse($entry)
{
list($name, $value) = self::splitStringIntoParts($entry);
return [self::sanitiseName($name), self::sanitiseValue($value)];
}
/**
* Split the compound string into parts.
*
* If the `$line` contains an `=` sign, then we split it into 2 parts.
*
* @param string $line
*
* @throws \Dotenv\Exception\InvalidFileException
*
* @return array
*/
private static function splitStringIntoParts($line)
{
$name = $line;
$value = null;
if (strpos($line, '=') !== false) {
list($name, $value) = array_map('trim', explode('=', $line, 2));
}
if ($name === '') {
throw new InvalidFileException(
self::getErrorMessage('an unexpected equals', $line)
);
}
return [$name, $value];
}
/**
* Strips quotes and the optional leading "export " from the variable name.
*
* @param string $name
*
* @throws \Dotenv\Exception\InvalidFileException
*
* @return string
*/
private static function sanitiseName($name)
{
$name = trim(str_replace(['export ', '\'', '"'], '', $name));
if (!self::isValidName($name)) {
throw new InvalidFileException(
self::getErrorMessage('an invalid name', $name)
);
}
return $name;
}
/**
* Is the given variable name valid?
*
* @param string $name
*
* @return bool
*/
private static function isValidName($name)
{
return preg_match('~\A[a-zA-Z0-9_.]+\z~', $name) === 1;
}
/**
* Strips quotes and comments from the environment variable value.
*
* @param string|null $value
*
* @throws \Dotenv\Exception\InvalidFileException
*
* @return string|null
*/
private static function sanitiseValue($value)
{
if ($value === null || trim($value) === '') {
return $value;
}
if (self::beginsWithAQuote($value)) {
return self::processQuotedValue($value);
}
// Strip comments from the left
$value = explode(' #', $value, 2)[0];
// Unquoted values cannot contain whitespace
if (preg_match('/\s+/', $value) > 0) {
// Check if value is a comment (usually triggered when empty value with comment)
if (preg_match('/^#/', $value) > 0) {
$value = '';
} else {
throw new InvalidFileException(
self::getErrorMessage('an unexpected space', $value)
);
}
}
return $value;
}
/**
* Strips quotes from the environment variable value.
*
* @param string $value
*
* @return string
*/
private static function processQuotedValue($value)
{
$quote = $value[0];
$pattern = sprintf(
'/^
%1$s # match a quote at the start of the value
( # capturing sub-pattern used
(?: # we do not need to capture this
[^%1$s\\\\]+ # any character other than a quote or backslash
|\\\\\\\\ # or two backslashes together
|\\\\%1$s # or an escaped quote e.g \"
)* # as many characters that match the previous rules
) # end of the capturing sub-pattern
%1$s # and the closing quote
.*$ # and discard any string after the closing quote
/mx',
$quote
);
$value = preg_replace($pattern, '$1', $value);
return str_replace('\\\\', '\\', str_replace("\\$quote", $quote, $value));
}
/**
* Generate a friendly error message.
*
* @param string $cause
* @param string $subject
*
* @return string
*/
private static function getErrorMessage($cause, $subject)
{
return sprintf(
'Failed to parse dotenv file due to %s. Failed at [%s].',
$cause,
strtok($subject, "\n")
);
}
/**
* Determine if the given string begins with a quote.
*
* @param string $value
*
* @return bool
*/
private static function beginsWithAQuote($value)
{
return isset($value[0]) && ($value[0] === '"' || $value[0] === '\'');
}
}