[Dotenv] allow LF in single-quoted strings

Author: nicolas-grekas

Dotenv.php

@@ -189,25 +189,18 @@ private function lexValue()
 
         do {
             if ("'" === $this->data[$this->cursor]) {
-                $value = '';
-                ++$this->cursor;
+                $len = 0;
 
-                while ("\n" !== $this->data[$this->cursor]) {
-                    if ("'" === $this->data[$this->cursor]) {
-                        break;
-                    }
-                    $value .= $this->data[$this->cursor];
-                    ++$this->cursor;
+                do {
+                    if ($this->cursor + ++$len === $this->end) {
+                        $this->cursor += $len;
 
-                    if ($this->cursor === $this->end) {
                         throw $this->createFormatException('Missing quote to end the value');
                     }
-                }
-                if ("\n" === $this->data[$this->cursor]) {
-                    throw $this->createFormatException('Missing quote to end the value');
-                }
-                ++$this->cursor;
-                $v .= $value;
+                } while ("'" !== $this->data[$this->cursor + $len]);
+
+                $v .= substr($this->data, 1 + $this->cursor, $len - 1);
+                $this->cursor += 1 + $len;
             } elseif ('"' === $this->data[$this->cursor]) {
                 $value = '';
                 ++$this->cursor;

Tests/DotenvTest.php

@@ -40,6 +40,7 @@ public function getEnvDataWithFormatErrors()
             ['FOO', "Missing = in the environment variable declaration in \".env\" at line 1.\n...FOO...\n     ^ line 1 offset 3"],
             ['FOO="foo', "Missing quote to end the value in \".env\" at line 1.\n...FOO=\"foo...\n          ^ line 1 offset 8"],
             ['FOO=\'foo', "Missing quote to end the value in \".env\" at line 1.\n...FOO='foo...\n          ^ line 1 offset 8"],
+            ['FOO=\'foo'."\n", "Missing quote to end the value in \".env\" at line 1.\n...FOO='foo\\n...\n            ^ line 1 offset 9"],
             ['export FOO', "Unable to unset an environment variable in \".env\" at line 1.\n...export FOO...\n            ^ line 1 offset 10"],
             ['FOO=${FOO', "Unclosed braces on variable expansion in \".env\" at line 1.\n...FOO=\${FOO...\n           ^ line 1 offset 9"],
         ];
@@ -105,6 +106,7 @@ public function getEnvData()
             ['FOO="bar\rfoo"', ['FOO' => "bar\rfoo"]],
             ['FOO=\'bar\nfoo\'', ['FOO' => 'bar\nfoo']],
             ['FOO=\'bar\rfoo\'', ['FOO' => 'bar\rfoo']],
+            ["FOO='bar\nfoo'", ['FOO' => "bar\nfoo"]],
             ['FOO=" FOO "', ['FOO' => ' FOO ']],
             ['FOO="  "', ['FOO' => '  ']],
             ['PATH="c:\\\\"', ['PATH' => 'c:\\']],