feat: handle multilines in env files

.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 +358,58 @@ 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 kr = /^[a-zA-Z_]+\w*$/
+  const sr = /\s/
+  const e: Record<string, string> = {}
+  let k = ''
+  let b = ''
+  let q = ''
+  let i = 0
+  const cap = () => { if (b && k) {
+    if (!kr.test(k)) throw new Error(`Invalid identifier: ${k}`)
+    e[k] = b; b = k = ''
+  }}
+
+  for (const c of content.replace(/\r\n?/mg, '\n')) {
+    if (i) {
+      if (c === '\n') i = 0
+      continue
+    }
+    if (!q) {
+      if (c === '#') {
+        i = 1
+        continue
+      }
+      if (c === '\n') {
+        cap()
+        continue
+      }
+      if (sr.test(c)) {
+        if (!k && b === 'export') b = ''
+        continue
+      }
+      if (c === '=') {
+        if (!k) { k = b; b = ''; continue }
+      }
+    }
+
+    if (c === '"' || c === "'" || c === '`') {
+      if (q === c) {
+        q = ''
+        cap()
+        continue
+      }
+      q = c
+      continue
+    }
+    b += c
+  }
+  cap()
+
+  return e
+}
 
 export const readEnvFromFile = (
   filepath: string,

test/cli.test.js

@@ -150,7 +150,7 @@ describe('cli', () => {
     assert.ok(p.stderr.endsWith(cwd + '\n'))
   })
 
-  test('supports `--env` options with file', async () => {
+  test('supports `--env` option', async () => {
     const env = tmpfile(
       '.env',
       `FOO=BAR

test/util.test.js

@@ -140,44 +140,53 @@ describe('util', () => {
     assert.equal(toCamelCase('SOME_MORE_BIG_STR'), 'someMoreBigStr')
     assert.equal(toCamelCase('kebab-input-str'), 'kebabInputStr')
   })
-})
 
-test('parseDotenv()', () => {
-  assert.deepEqual(
-    parseDotenv('ENV=v1\nENV2=v2\n\n\n  ENV3  =    v3   \nexport ENV4=v4'),
-    {
+  test.only('parseDotenv()', () => {
+    const multiline = `SIMPLE=xyz123
+# comment ###
+NON_INTERPOLATED='raw text without variable interpolation' 
+MULTILINE = """
+long text here, # not-comment
+e.g. a private SSH key
+"""
+ENV=v1\nENV2=v2\n\n\n\t\t  ENV3  =    v3   \n   export ENV4=v4
+ENV5=v5 # comment
+`
+
+    assert.deepEqual(parseDotenv(multiline), {
+      SIMPLE: 'xyz123',
+      NON_INTERPOLATED: 'raw text without variable interpolation',
+      MULTILINE: '\nlong text here, # not-comment\ne.g. a private SSH key\n',
       ENV: 'v1',
       ENV2: 'v2',
       ENV3: 'v3',
       ENV4: 'v4',
-    }
-  )
-  assert.deepEqual(parseDotenv(''), {})
+      ENV5: 'v5',
+    })
 
-  // TBD: multiline
-  const multiline = `SIMPLE=xyz123
-NON_INTERPOLATED='raw text without variable interpolation'
-MULTILINE = """
-long text here,
-e.g. a private SSH key
-"""`
-})
-
-describe('readEnvFromFile()', () => {
-  test('handles correct proccess.env', () => {
-    const file = tempfile('.env', 'ENV=value1\nENV2=value24')
-    const env = readEnvFromFile(file)
-    assert.equal(env.ENV, 'value1')
-    assert.equal(env.ENV2, 'value24')
-    assert.ok(env.NODE_VERSION !== '')
+    assert.deepEqual(
+      parseDotenv(`FOO=BAR
+      BAR=FOO+`),
+      { FOO: 'BAR', BAR: 'FOO+' }
+    )
   })
 
-  test('handles correct some env', () => {
-    const file = tempfile('.env', 'ENV=value1\nENV2=value24')
-    const env = readEnvFromFile(file, { version: '1.0.0', name: 'zx' })
-    assert.equal(env.ENV, 'value1')
-    assert.equal(env.ENV2, 'value24')
-    assert.equal(env.version, '1.0.0')
-    assert.equal(env.name, 'zx')
+  describe('readEnvFromFile()', () => {
+    test('handles correct proccess.env', () => {
+      const file = tempfile('.env', 'ENV=value1\nENV2=value24')
+      const env = readEnvFromFile(file)
+      assert.equal(env.ENV, 'value1')
+      assert.equal(env.ENV2, 'value24')
+      assert.ok(env.NODE_VERSION !== '')
+    })
+
+    test('handles correct some env', () => {
+      const file = tempfile('.env', 'ENV=value1\nENV2=value24')
+      const env = readEnvFromFile(file, { version: '1.0.0', name: 'zx' })
+      assert.equal(env.ENV, 'value1')
+      assert.equal(env.ENV2, 'value24')
+      assert.equal(env.version, '1.0.0')
+      assert.equal(env.name, 'zx')
+    })
   })
 })