feat: handle multilines in env files

continues #974

Author: antongolub

.size-limit.json

@@ -9,7 +9,7 @@
   {
     "name": "zx/index",
     "path": "build/*.{js,cjs}",
-    "limit": "805 kB",
+    "limit": "805.5 kB",
     "brotli": false,
     "gzip": false
   },
@@ -30,7 +30,7 @@
   {
     "name": "all",
     "path": "build/*",
-    "limit": "842 kB",
+    "limit": "842.5 kB",
     "brotli": false,
     "gzip": false
   }

src/util.ts

@@ -358,15 +358,40 @@ export const toCamelCase = (str: string) =>
 export const parseBool = (v: string): boolean | string =>
   ({ true: true, false: false })[v] ?? v
 
-export const parseDotenv = (content: string): NodeJS.ProcessEnv =>
-  content.split(/\r?\n/).reduce<NodeJS.ProcessEnv>((r, line) => {
-    if (line.startsWith('export ')) line = line.slice(7)
-    const i = line.indexOf('=')
-    const k = line.slice(0, i).trim()
-    const v = line.slice(i + 1).trim()
-    if (k && v) r[k] = v
-    return r
-  }, {})
+// prettier-ignore
+export const parseDotenv = (content: string): NodeJS.ProcessEnv => {
+  const e: Record<string, string> = {}
+  let k = ''
+  let c = ''
+  let q = ''
+  const cap = () => {if (c && k) { e[k] = c; c = ''; k = '' }}
+
+  for (const s of content) {
+    if (s === ' ' && !q) {
+      if (!k && c === 'export') c = ''
+      continue
+    }
+    if (s === '=' && !q) {
+      if (!k) { k = c; c = ''; continue }
+    }
+    if (s === '\n' && !q) {
+      cap()
+      continue
+    }
+    if (s === '"' || s === "'") {
+      if (q === s) {
+        q = ''
+        cap()
+        continue
+      }
+      q = s
+      continue
+    }
+    c += s
+  }
+
+  return e
+}
 
 export const readEnvFromFile = (
   filepath: string,

test/util.test.js

@@ -143,24 +143,24 @@ describe('util', () => {
 })
 
 test('parseDotenv()', () => {
-  assert.deepEqual(
-    parseDotenv('ENV=v1\nENV2=v2\n\n\n  ENV3  =    v3   \nexport ENV4=v4'),
-    {
-      ENV: 'v1',
-      ENV2: 'v2',
-      ENV3: 'v3',
-      ENV4: 'v4',
-    }
-  )
-  assert.deepEqual(parseDotenv(''), {})
-
-  // TBD: multiline
   const multiline = `SIMPLE=xyz123
 NON_INTERPOLATED='raw text without variable interpolation'
 MULTILINE = """
 long text here,
 e.g. a private SSH key
-"""`
+"""
+ENV=v1\nENV2=v2\n\n\n  ENV3  =    v3   \n   export ENV4=v4
+`
+
+  assert.deepEqual(parseDotenv(multiline), {
+    SIMPLE: 'xyz123',
+    NON_INTERPOLATED: 'raw text without variable interpolation',
+    MULTILINE: '\nlong text here,\ne.g. a private SSH key\n',
+    ENV: 'v1',
+    ENV2: 'v2',
+    ENV3: 'v3',
+    ENV4: 'v4',
+  })
 })
 
 describe('readEnvFromFile()', () => {