1.3.0

README.md

@@ -1,4 +1,18 @@
-The command line tool to read, manipulate and update .env files.
+The command line tool and library to read, manipulate and update .env files.
+
+## Features
+
+* by default, preserves white spaces, line breaks and comments
+* supports reading and updating .env files
+* can parse .env file into JSON format
+* when parsing checks format validity and report error line number
+* can read and write to stdin/stdout to be used in shell as a part of commands pipeline
+* support multiple input files for updates as well as list of arguments at end of command
+* supports single and double quoted values
+* support comment lines and comments at end of variables
+* can do smart append to preserve logical groups of variables
+* can beautify (normalize) file layout
+* command line can work in resilient mode, ignoring parsing errors
 
 ## Setup
 
@@ -16,6 +30,16 @@ $ cat result.txt
 value1
 ```
 
+By default, new keys are added at end of resulting file.
+This can be changed by options:
+
+* `--onlyUpdate` - prevents new keys to be appended, only existing keys are updated 
+* `--smartAppend` - finds most similar group of variables and appends new variables between them, preserving alphabetical order.
+
+To disable updating (overwriting) existing keys, and only append (supplement with) new keys, use `--onlyAppend`
+
+To operate on files, specify input file(s) with `-i` and output file with `-o`. To modify first input file use `-m`.
+
 ### Modify files
 
 ```bash
@@ -23,9 +47,9 @@ $ dotenv-tool -h
 ```
 
 ```
-Usage: dotenv-tool [options] [command] [paramsToSet]
+Usage: dotenv-tool [options] [command] [paramsToSet...]
 
-Tool to read and update .env files
+Tool to read, parse and update .env files
 
 Arguments:
   paramsToSet                  space separated list of additional envs to set, in format key=value (default: "")
@@ -35,11 +59,17 @@ Options:
   -i, --files <filePaths...>   Input file(s)
   -o, --outputFile <filePath>  Output file
   -m, --modify                 Modify first input file
+  -b, --beautify               Beautifies resulting env file
+  -u, --onlyUpdate             Only updates existing values, without appending new values
+  -a, --onlyAppend             Only append new values, without updating existing values
+  -p, --smartAppend            Smart appends variables depending on their names
+  -r, --resilient              Ignore files that cannot be read during update
   -s, --silent                 Mute all messages and errors
   -h, --help                   display help for command
 
 Commands:
   get [options] <key>          Returns given variable from env file (if specified)
+  parse [options]              Parses and returns env file as JSON
 ```
 
 ### Read prop from file
@@ -60,3 +90,88 @@ Options:
   -f, --file <filePath>  Input file to parse (if not given, stdio is used)
   -h, --help             display help for command
 ```
+
+Also accept `-o` flag.
+
+### Parse .env file/input as JSON
+
+```bash
+$ dotenv-tool parse -h
+```
+
+```
+Usage: dotenv-tool parse [options]
+
+Parses and returns env file as JSON
+
+Options:
+  -f, --file <filePath>  Input file to parse (if not given, stdio is used)
+  -n, --normalize        Normalize keys in JSON (lowercase them)
+  -h, --help             display help for command
+```
+
+Parse also accepts `-b` and `-o` flags.
+
+## API
+
+Internally, library parses into and manipulates on array of tokens `Token[]`: 
+
+* `VariableToken` holding contents of line with variable
+* `SimpleToken` - for new lines, white space lines or comment lines.
+
+To parse .env string, use `parseMultiLine`, to update list of tokens use `update`, to convert token list back into .env string use `stringifyTokens`.
+
+```ts
+import { parseMultiLine } from 'dotenv-tool'
+
+const tokens = parseMultiLine("VAR1=value1\nVAR2=value2");
+const updatedTokens = update(tokens, { name: 'VAR1', value: 'new value', comment: ' # optional comment' });
+console.log(stringifyTokens(updatedTokens))
+```
+
+### update
+
+```ts
+function update(tokens: Token[], updateWith: VariableToUpdate[], config?: Config): Token[];
+```
+
+For convenience, `update` can get list of updates (`updateWith` argument) in three different formats:
+
+* **Tuple** 
+  `[string, string | null]` - with key on position `0` and value on position `1`
+* **Simple object** 
+  `Variable` type - contains key, value and optional comment
+* **Token** 
+  `VariableToken` type - useful when updating with result of parsing other .env strings
+
+```ts
+update(tokens, [['VAR1', 'new value'], ['VAR2', null]])
+update(tokens, [ { name: 'VAR1', value: 'new value' }])
+update(tokens, [ 
+  { 
+    token: TokenType.VARIABLE,
+    name: 'VAR1', 
+    value: 'new value',
+    beginning: '',
+    equals: ' = ', // extra space around =
+    quote: '"',    // value will be inside double quotes
+    ending: '   '  // extra white space at end of line
+    comment: ''
+  }
+])
+```
+
+If new value is `null` - **variable will be deleted**, if it is empty string or `undefined` - it will be left empty (`VAR=`)
+
+### Configuration
+
+Both `update` as well as `stringifyTokens` take `config` parameter:
+
+```ts
+type Config = {
+    beautify?: boolean;            // if true, output will be beautified/normalized. Default: false
+    enforceNewLineEnd?: boolean;   // if true, output will have ensured \n character at end. Default: true
+    noUpdate?: boolean;            // if true, only new values will be appended, but existing one wont be updated
+    modifyMode?: ModifyMode;       // decide if new keys should or should not be added, and where. Default: ModifyMode.APPEND
+};
+```

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "dotenv-tool",
-  "version": "1.0.1",
+  "version": "1.3.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "dotenv-tool",
-      "version": "1.0.1",
+      "version": "1.3.0",
       "license": "MIT",
       "dependencies": {
         "commander": "^11.0.0",

package.json

@@ -1,7 +1,7 @@
 {
   "name": "dotenv-tool",
-  "version": "1.0.0",
+  "version": "1.3.0",
-  "description": "Tool to read and update .env files",
+  "description": "Tool to read, parse and update .env files",
   "repository": {
     "type": "git",
     "url": "https://gitea.dzienia.pl/shared/dotenv-tool.git"

src/bin_get.test.ts

@@ -0,0 +1,121 @@
+import { mockProcessExit, mockProcessStderr, mockProcessStdout } from 'jest-mock-process';
+import { makeProgram } from './binlib';
+import { Command } from 'commander';
+import mock from 'mock-fs';
+import fs from 'fs';
+
+let mockStdout: jest.SpyInstance;
+let mockStderr: jest.SpyInstance;
+let mockExit: jest.SpyInstance;
+let program: Command;
+let stdinContents = '';
+
+function getContents() {
+  return stdinContents;
+}
+
+jest.mock('./binutils.ts', () => ({
+  stdinToString: jest.fn(() => getContents()),
+}));
+
+beforeEach(() => {
+  mockStdout = mockProcessStdout();
+  mockStderr = mockProcessStderr();
+  program = makeProgram();
+  program.exitOverride();
+  mockExit = mockProcessExit();
+  mock({
+    '.env': 'ALA=makota',
+    'ugly.env': '########\n\n SOME = value \n\n\n ANOTHER=  "value with space"',
+    'first.env': 'SERVER_PORT=80\nSERVER_HOST=localhost',
+    'second.env': 'SERVER_PORT=8080\nSERVER_PASSWORD=secret\nCLIENT_HOST=192.168.4.42',
+    'third.env': 'CLIENT_PORT=3000',
+    'broken.env': 'CLI ENT_PORT=3000',
+    'read-only.env': mock.file({
+      content: 'READ=only',
+      mode: 0o444,
+    }),
+  });
+  stdinContents = '';
+});
+
+afterEach(() => {
+  mockStdout.mockRestore();
+  mockStderr.mockRestore();
+  mockExit.mockRestore();
+  mock.restore();
+});
+
+describe('Standard utils', () => {
+  it('outputs help', () => {
+    expect(() => {
+      program.parse(['node', 'test', '--help']);
+    }).toThrow();
+    expect(mockStdout).toHaveBeenCalledWith(expect.stringContaining('Usage: dotenv-tool [options] [command] [paramsToSet...]'));
+  });
+
+  it('outputs version', () => {
+    expect(() => {
+      program.parse(['node', 'test', '-v']);
+    }).toThrow(
+      expect.objectContaining({
+        message: expect.stringMatching(/[0-9]+\.[0-9]+\.[0-9]+/),
+      }),
+    );
+  });
+});
+
+describe('Read command', () => {
+  it('reads from empty stdin', () => {
+    stdinContents = '';
+    program.parse(['node', 'test', 'get', 'TEST']);
+    expect(mockExit).toHaveBeenCalledWith(1);
+    expect(mockStderr).toBeCalledTimes(1);
+    expect(mockStderr).toHaveBeenNthCalledWith(1, expect.stringMatching(/Variable TEST not found in stdin/));
+  });
+
+  it('reads from invalid stdin', () => {
+    stdinContents = 'junks';
+    program.parse(['node', 'test', 'get', 'TEST']);
+    expect(mockExit).toHaveBeenCalledWith(1);
+    expect(mockStderr).toBeCalledTimes(2);
+    expect(mockStderr).toHaveBeenNthCalledWith(1, expect.stringMatching(/Parsing stdin failed/));
+    expect(mockStderr).toHaveBeenNthCalledWith(2, expect.stringMatching(/PARSING FAILED/));
+  });
+
+  it('reads from correct stdin', () => {
+    stdinContents = 'TEST=works';
+    program.parse(['node', 'test', 'get', 'TEST']);
+    expect(mockExit).toBeCalled();
+    expect(mockStdout).toHaveBeenCalledWith('works');
+  });
+
+  it('writes result to file', () => {
+    stdinContents = 'TEST=works';
+    program.parse(['node', 'test', 'get', '-o', 'test.txt', 'TEST']);
+    expect(mockExit).toBeCalled();
+    expect(fs.readFileSync('test.txt').toString()).toEqual('works');
+  });
+
+  it('reads from correct file', () => {
+    program.parse(['node', 'test', 'get', '-f', '.env', 'ALA']);
+    expect(mockExit).toBeCalled();
+    expect(mockStdout).toHaveBeenCalledWith('makota');
+  });
+});
+
+describe('Silent flag', () => {
+  it('reads from empty stdin', () => {
+    stdinContents = '';
+    program.parse(['node', 'test', '-s', 'get', 'TEST']);
+    expect(mockExit).toHaveBeenCalledWith(1);
+    expect(mockStderr).toBeCalledTimes(0);
+  });
+
+  it('reads from invalid stdin', () => {
+    stdinContents = 'junks';
+    program.parse(['node', 'test', '-s', 'get', 'TEST']);
+    expect(mockExit).toHaveBeenCalledWith(1);
+    expect(mockStderr).toBeCalledTimes(0);
+  });
+});

src/bin_parse.test.ts

@@ -0,0 +1,121 @@
+import { mockProcessExit, mockProcessStderr, mockProcessStdout } from 'jest-mock-process';
+import { makeProgram } from './binlib';
+import { Command } from 'commander';
+import mock from 'mock-fs';
+import fs from 'fs';
+
+let mockStdout: jest.SpyInstance;
+let mockStderr: jest.SpyInstance;
+let mockExit: jest.SpyInstance;
+let program: Command;
+let stdinContents = '';
+
+function getContents() {
+  return stdinContents;
+}
+
+jest.mock('./binutils.ts', () => ({
+  stdinToString: jest.fn(() => getContents()),
+}));
+
+beforeEach(() => {
+  mockStdout = mockProcessStdout();
+  mockStderr = mockProcessStderr();
+  program = makeProgram();
+  program.exitOverride();
+  mockExit = mockProcessExit();
+  mock({
+    '.env': 'ALA=makota',
+    'ugly.env': '########\n\n SOME = value \n\n\n ANOTHER=  "value with space"',
+    'first.env': 'SERVER_PORT=80\nSERVER_HOST=localhost',
+    'second.env': 'SERVER_PORT=8080\nSERVER_PASSWORD=secret\nCLIENT_HOST=192.168.4.42',
+    'third.env': 'CLIENT_PORT=3000',
+    'broken.env': 'CLI ENT_PORT=3000',
+    'read-only.env': mock.file({
+      content: 'READ=only',
+      mode: 0o444,
+    }),
+  });
+  stdinContents = '';
+});
+
+afterEach(() => {
+  mockStdout.mockRestore();
+  mockStderr.mockRestore();
+  mockExit.mockRestore();
+  mock.restore();
+});
+
+describe('Parse command', () => {
+  it('reads from empty stdin', () => {
+    stdinContents = '';
+    program.parse(['node', 'test', 'parse']);
+    expect(mockStdout).toBeCalledTimes(2);
+    expect(mockStdout).toHaveBeenNthCalledWith(1, "{\"status\":\"ok\",\"values\":{}}");
+  });
+
+  it('reads from invalid stdin', () => {
+    stdinContents = 'junks';
+    program.parse(['node', 'test', 'parse']);
+    expect(mockExit).toHaveBeenCalledWith(1);
+    expect(mockStdout).toBeCalledTimes(2);
+    expect(mockStdout).toHaveBeenNthCalledWith(1, expect.stringMatching(/\"status\":\"parse_error\"/));
+    expect(mockStdout).toHaveBeenNthCalledWith(1, expect.stringMatching(/\"errorLine\":1/));
+  });
+
+  it('reads from correct stdin', () => {
+    stdinContents = 'TEST=works';
+    program.parse(['node', 'test', 'parse', 'TEST']);
+    expect(mockExit).toBeCalled();
+    expect(mockStdout).toHaveBeenCalledWith("{\"status\":\"ok\",\"values\":{\"TEST\":\"works\"}}");
+  });
+
+  it('writes result to file', () => {
+    stdinContents = 'TEST=works';
+    program.parse(['node', 'test', 'parse', '-o', 'test.txt']);
+    expect(mockExit).toBeCalled();
+    expect(fs.readFileSync('test.txt').toString()).toEqual("{\"status\":\"ok\",\"values\":{\"TEST\":\"works\"}}");
+  });
+
+  it('writes error to file', () => {
+    stdinContents = 'junks';
+    program.parse(['node', 'test', 'parse', '-o', 'test.txt']);
+    expect(mockExit).toBeCalled();
+    const fileCnt = fs.readFileSync('test.txt').toString();
+    expect(fileCnt).toMatch(/\"status\":\"parse_error\"/);
+    expect(fileCnt).toMatch(/\"errorLine\":1/);
+  });
+
+  it('writes error to file beautified', () => {
+    stdinContents = 'junks';
+    program.parse(['node', 'test', 'parse', '-b', '-o', 'test.txt']);
+    expect(mockExit).toBeCalled();
+    const fileCnt = fs.readFileSync('test.txt').toString();
+    expect(fileCnt).toMatch(/\"status\": \"parse_error\"/);
+    expect(fileCnt).toMatch(/\"errorLine\": 1/);
+  });
+
+  it('reads from correct file', () => {
+    program.parse(['node', 'test', 'parse', '-f', '.env']);
+    expect(mockExit).toBeCalled();
+    expect(mockStdout).toHaveBeenCalledWith("{\"status\":\"ok\",\"values\":{\"ALA\":\"makota\"}}");
+  });
+
+  it('parses file', () => {
+    program.parse(['node', 'test', 'parse', '-f', 'second.env']);
+    expect(mockExit).toBeCalled();
+    expect(mockStdout).toHaveBeenCalledWith("{\"status\":\"ok\",\"values\":{\"SERVER_PORT\":\"8080\",\"SERVER_PASSWORD\":\"secret\",\"CLIENT_HOST\":\"192.168.4.42\"}}");
+  });
+
+  it('normalize json keys', () => {
+    program.parse(['node', 'test', 'parse', '-n', '-f', 'second.env']);
+    expect(mockExit).toBeCalled();
+    expect(mockStdout).toHaveBeenCalledWith("{\"status\":\"ok\",\"values\":{\"server_port\":\"8080\",\"server_password\":\"secret\",\"client_host\":\"192.168.4.42\"}}");
+  });
+
+  it('beautify keys', () => {
+    program.parse(['node', 'test', 'parse', '-b', '-n', '-f', '.env']);
+    expect(mockExit).toBeCalled();
+    expect(mockStdout).toHaveBeenCalledWith("{\n    \"status\": \"ok\",\n    \"values\": {\n        \"ala\": \"makota\"\n    }\n}");
+  });
+});

src/bin_update.test.ts

@@ -46,64 +46,6 @@ afterEach(() => {
   mock.restore();
 });
 
-describe('Standard utils', () => {
-  it('outputs help', () => {
-    expect(() => {
-      program.parse(['node', 'test', '--help']);
-    }).toThrow();
-    expect(mockStdout).toHaveBeenCalledWith(expect.stringContaining('Usage: dotenv-tool [options] [command] [paramsToSet...]'));
-  });
-
-  it('outputs version', () => {
-    expect(() => {
-      program.parse(['node', 'test', '-v']);
-    }).toThrow(
-      expect.objectContaining({
-        message: expect.stringMatching(/[0-9]+\.[0-9]+\.[0-9]+/),
-      }),
-    );
-  });
-});
-
-describe('Read command', () => {
-  it('reads from empty stdin', () => {
-    stdinContents = '';
-    program.parse(['node', 'test', 'get', 'TEST']);
-    expect(mockExit).toHaveBeenCalledWith(1);
-    expect(mockStderr).toBeCalledTimes(1);
-    expect(mockStderr).toHaveBeenNthCalledWith(1, expect.stringMatching(/Variable TEST not found in stdin/));
-  });
-
-  it('reads from invalid stdin', () => {
-    stdinContents = 'junks';
-    program.parse(['node', 'test', 'get', 'TEST']);
-    expect(mockExit).toHaveBeenCalledWith(1);
-    expect(mockStderr).toBeCalledTimes(2);
-    expect(mockStderr).toHaveBeenNthCalledWith(1, expect.stringMatching(/Parsing stdin failed/));
-    expect(mockStderr).toHaveBeenNthCalledWith(2, expect.stringMatching(/PARSING FAILED/));
-  });
-
-  it('reads from correct stdin', () => {
-    stdinContents = 'TEST=works';
-    program.parse(['node', 'test', 'get', 'TEST']);
-    expect(mockExit).toBeCalled();
-    expect(mockStdout).toHaveBeenCalledWith('works');
-  });
-
-  it('writes result to file', () => {
-    stdinContents = 'TEST=works';
-    program.parse(['node', 'test', 'get', '-o', 'test.txt', 'TEST']);
-    expect(mockExit).toBeCalled();
-    expect(fs.readFileSync('test.txt').toString()).toEqual('works');
-  });
-
-  it('reads from correct file', () => {
-    program.parse(['node', 'test', 'get', '-f', '.env', 'ALA']);
-    expect(mockExit).toBeCalled();
-    expect(mockStdout).toHaveBeenCalledWith('makota');
-  });
-});
-
 describe('Update command', () => {
   it('creates empty output without params or stdin', () => {
     stdinContents = '';
@@ -215,12 +157,24 @@ describe('Update command', () => {
     expect(mockStdout).toHaveBeenCalledWith('SERVER_PORT=8080\nSERVER_HOST=localhost\nSERVER_PASSWORD=secret\nCLIENT_HOST=192.168.4.42\nCLIENT_PORT=3000\n');
   });
 
+  it('merge files without update', () => {
+    program.parse(['node', 'test', '-a', '-i', 'first.env', 'second.env', 'third.env']);
+    expect(mockExit).toBeCalled();
+    expect(mockStdout).toHaveBeenCalledWith('SERVER_PORT=80\nSERVER_HOST=localhost\nSERVER_PASSWORD=secret\nCLIENT_HOST=192.168.4.42\nCLIENT_PORT=3000\n');
+  });
+
   it('merge files with smart append', () => {
     program.parse(['node', 'test', '-p', '-i', 'first.env', 'second.env', 'third.env']);
     expect(mockExit).toBeCalled();
     expect(mockStdout).toHaveBeenCalledWith('CLIENT_HOST=192.168.4.42\nCLIENT_PORT=3000\nSERVER_PASSWORD=secret\nSERVER_PORT=8080\nSERVER_HOST=localhost\n');
   });
 
+  it('merge files with smart append without update', () => {
+    program.parse(['node', 'test', '-p', '-a', '-i', 'first.env', 'second.env', 'third.env']);
+    expect(mockExit).toBeCalled();
+    expect(mockStdout).toHaveBeenCalledWith('CLIENT_HOST=192.168.4.42\nCLIENT_PORT=3000\nSERVER_PASSWORD=secret\nSERVER_PORT=80\nSERVER_HOST=localhost\n');
+  });
+
   it('merge files and set from parameter', () => {
     program.parse(['node', 'test', '-i', 'first.env', 'second.env', 'third.env', '--', 'SERVER_PASSWORD=updated value']);
     expect(mockExit).toBeCalled();
@@ -229,6 +183,14 @@ describe('Update command', () => {
     );
   });
 
+  it('merge files and set from parameter without update', () => {
+    program.parse(['node', 'test', '-a', '-i', 'first.env', 'second.env', 'third.env', '--', 'SERVER_PASSWORD=tried updated value', 'NEW_VALUE=append']);
+    expect(mockExit).toBeCalled();
+    expect(mockStdout).toHaveBeenCalledWith(
+      'SERVER_PORT=80\nSERVER_HOST=localhost\nSERVER_PASSWORD=secret\nCLIENT_HOST=192.168.4.42\nCLIENT_PORT=3000\nNEW_VALUE=append\n',
+    );
+  });
+
   it('merge files and set from parameter and invalid parameter', () => {
     program.parse(['node', 'test', '-i', 'first.env', 'second.env', 'third.env', '--', 'SERVER_PASSWORD=updated value', 'INVA LID', 'LAST_ARGUMENT=correct']);
     expect(mockExit).toHaveBeenCalledWith(1);
@@ -368,19 +330,6 @@ describe('Update command resiliency', () => {
 });
 
 describe('Silent flag', () => {
-  it('reads from empty stdin', () => {
-    stdinContents = '';
-    program.parse(['node', 'test', '-s', 'get', 'TEST']);
-    expect(mockExit).toHaveBeenCalledWith(1);
-    expect(mockStderr).toBeCalledTimes(0);
-  });
-
-  it('reads from invalid stdin', () => {
-    stdinContents = 'junks';
-    program.parse(['node', 'test', '-s', 'get', 'TEST']);
-    expect(mockExit).toHaveBeenCalledWith(1);
-    expect(mockStderr).toBeCalledTimes(0);
-  });
 
   it('reads from invalid stdin', () => {
     stdinContents = 'junks';

src/binlib.ts

@@ -6,6 +6,14 @@ import { parseMultiLine, stringifyTokens } from './parser';
 import { Config, ModifyMode, TokenType, VariableToken } from './types';
 import { update } from './manipulation';
 
+type StringMapObj = { [key: string]: any };
+enum ParseStatus {
+  OK = 'ok',
+  PARSE_ERROR = 'parse_error',
+  ERROR = 'error',
+}
+type ParseResult = { status: ParseStatus; values?: StringMapObj; error?: any; errorLine?: Number };
+
 export function normalizeParamVar(name: string, value: string): string {
   let fixValue = value;
   if (value.match(/[\s"']/)) {
@@ -88,19 +96,78 @@ function makeReadCommand() {
   return getCmd;
 }
 
+function makeParseCommand() {
+  const getCmd = new Command('parse');
+  getCmd
+    .description('Parses and returns env file as JSON')
+    .option('-f, --file <filePath>', 'Input file to parse (if not given, stdio is used)')
+    .option('-n, --normalize', 'Normalize keys in JSON (lowercase them)')
+    .action((options, cmd) => {
+      const globOpts = cmd.optsWithGlobals();
+      const data = options.file ? fs.readFileSync(options.file).toString() : stdinToString();
+      const sourceName = options.file ? `file ${options.file}` : `stdin`;
+      let result: ParseResult = { status: ParseStatus.OK };
+      try {
+        const tokens = parseMultiLine(data);
+        let values: StringMapObj = {};
+        tokens
+          .filter((t) => t.token === TokenType.VARIABLE)
+          .forEach((vt) => {
+            let tokenName = (vt as VariableToken).name;
+            const tokenValue = (vt as VariableToken).value;
+            if (options.normalize) {
+              tokenName = tokenName.toLowerCase();
+            }
+            values[tokenName] = tokenValue;
+          });
+
+        result.values = values;
+        const outputStr = JSON.stringify(result, null, globOpts.beautify ? '    ' : '');
+        if (globOpts.outputFile) {
+          fs.writeFileSync(globOpts.outputFile, outputStr);
+        } else {
+          process.stdout.write(outputStr);
+          process.stdout.write('\n');
+        }
+        process.exit();
+      } catch (e: any) {
+        result.status = ParseStatus.ERROR;
+        result.error = e;
+
+        if (e.type == 'ParsimmonError') {
+          result.status = ParseStatus.PARSE_ERROR;
+          result.errorLine = e.result.index.line;
+        }
+
+        const outputStr = JSON.stringify(result, null, globOpts.beautify ? '    ' : '');
+        if (globOpts.outputFile) {
+          fs.writeFileSync(globOpts.outputFile, outputStr);
+        } else {
+          process.stdout.write(outputStr);
+          process.stdout.write('\n');
+        }
+        process.exit(1);
+      }
+    });
+
+  return getCmd;
+}
+
 export function makeProgram() {
   const program = new Command();
   program
     .name('dotenv-tool')
-    .description('Tool to read and update .env files')
+    .description('Tool to read, parse and update .env files')
     .version(version, '-v, --version')
     .addCommand(makeReadCommand())
+    .addCommand(makeParseCommand())
     .argument('[paramsToSet...]', 'space separated list of additional envs to set, in format key=value', '')
     .option('-i, --files <filePaths...>', 'Input file(s)')
     .option('-o, --outputFile <filePath>', 'Output file')
     .option('-m, --modify', 'Modify first input file')
     .option('-b, --beautify', 'Beautifies resulting env file')
     .option('-u, --onlyUpdate', 'Only updates existing values, without appending new values')
+    .option('-a, --onlyAppend', 'Only append new values, without updating existing values')
     .option('-p, --smartAppend', 'Smart appends variables depending on their names')
     .option('-r, --resilient', 'Ignore files that cannot be read during update')
     .option('-s, --silent', 'Mute all messages and errors')
@@ -128,6 +195,7 @@ export function makeProgram() {
         let sourceParsingError = '';
 
         config.beautify = options.beautify || false;
+        config.noUpdate = options.onlyAppend || false;
         config.modifyMode = options.onlyUpdate ? ModifyMode.NO_APPEND : options.smartAppend ? ModifyMode.SMART_APPEND : ModifyMode.APPEND;
 
         const baseData = inputData.shift() || '';

src/manipulation.test.ts

@@ -104,6 +104,75 @@ describe('Updating tokens', () => {
     );
   });
 
+  it('do not update in append only mode', () => {
+    expect(stringifyTokens(update([vtoken('ALA', 'ma kota')], [['ALA', 'ma psa']], { modifyMode: ModifyMode.APPEND, noUpdate: true }))).toEqual('ALA="ma kota"\n');
+    expect(
+      stringifyTokens(
+        update(
+          [vtoken('ALA', 'ma kota')],
+          [
+            ['ALA', 'ma psa'],
+            ['ALA', 'ma jednak kota'],
+          ],
+          { modifyMode: ModifyMode.APPEND, noUpdate: true },
+        ),
+      ),
+    ).toEqual('ALA="ma kota"\n');
+    expect(
+      stringifyTokens(
+        update(
+          [vtoken('ALA', 'ma kota')],
+          [
+            ['ALA', 'ma psa'],
+            ['ALA', 'ma jednak kota'],
+          ],
+        ),
+      ),
+    ).toEqual('ALA="ma jednak kota"\n');
+
+    expect(
+      stringifyTokens(
+        update(
+          [vtoken('HOST', '127.0.0.1'), nltoken(), vtoken('PORT', '80'), nltoken(), vtoken('LOGIN', 'root')],
+          [['LOGIN', 'debian'], { name: 'PORT', value: '8080', comment: ' # debug only' }],
+          { modifyMode: ModifyMode.APPEND, noUpdate: true },
+        ),
+      ),
+    ).toEqual('HOST=127.0.0.1\nPORT=80\nLOGIN=root\n');
+
+    expect(
+      stringifyTokens(
+        update(
+          [
+            ctoken('###########'),
+            nltoken(),
+            ctoken('# Server'),
+            nltoken(),
+            ctoken('###########'),
+            nltoken('\n\n'),
+            vtoken('SERVER_HOST', '127.0.0.1'),
+            nltoken(),
+            vtoken('SERVER_PORT', '80'),
+            nltoken(),
+            vtoken('SERVER_LOGIN', 'root'),
+            nltoken('\n\n'),
+            ctoken('###########'),
+            nltoken(),
+            ctoken('# Client'),
+            nltoken(),
+            ctoken('###########'),
+            nltoken('\n\n'),
+            vtoken('CLIENT_LOGIN', 'john'),
+          ],
+          [['SERVER_LOGIN', 'debian'], { name: 'SERVER_PORT', value: '8080', comment: ' # debug only' }, ['SERVER_PASSWORD', 'secret']],
+          { modifyMode: ModifyMode.APPEND, noUpdate: true },
+        ),
+      ),
+    ).toEqual(
+      '###########\n# Server\n###########\n\nSERVER_HOST=127.0.0.1\nSERVER_PORT=80\nSERVER_LOGIN=root\n\n###########\n# Client\n###########\n\nCLIENT_LOGIN=john\nSERVER_PASSWORD=secret\n',
+    );
+  });
+
   it('delete value', () => {
     expect(
       stringifyTokens(
@@ -227,6 +296,108 @@ describe('Updating tokens', () => {
       '###########\n# Server\n###########\n\nSERVER_HOST=127.0.0.1\nSERVER_PASSWORD=secret\nSERVER_PORT=8080 # debug only\nSERVER_LOGIN=debian\n\n###########\n# Client\n###########\n\nCLIENT_LOGIN=john\n',
     );
   });
+
+  it('appends smart with no update config', () => {
+    expect(
+      stringifyTokens(
+        update(
+          [
+            vtoken('SERVER_HOST', '127.0.0.1'),
+            vtoken('SERVER_PORT', '80'),
+            vtoken('SERVER_LOGIN', 'root'),
+            ctoken('#-------------------------'),
+            vtoken('CLIENT_LOGIN', 'john'),
+            vtoken('CLIENT_X_AXIS', '12'),
+            ctoken('#-------------------------'),
+            vtoken('AUTO_RUN', 'true'),
+            vtoken('AUTO_CLEAN', 'false'),
+          ],
+          [
+            ['CLIENT_ACCESS', 'limited'],
+            ['SERVER_OUTPUT', '/dev/null'],
+            ['CLIENT_Z_AXIS', '100'],
+            ['ZOOM', '100%'],
+            ['AUTO_STOP', 'true'],
+            ['QUALITY', '90%'],
+            ['AUTO_APPEND', 'true'],
+            ['AUTO_ZERO', '000'],
+          ],
+          { modifyMode: ModifyMode.SMART_APPEND, noUpdate: true },
+        ),
+      ),
+    ).toEqual(
+      'SERVER_HOST=127.0.0.1\nSERVER_OUTPUT=/dev/null\nSERVER_PORT=80\nSERVER_LOGIN=root\n' +
+        '#-------------------------\n' +
+        'CLIENT_ACCESS=limited\nCLIENT_LOGIN=john\nCLIENT_X_AXIS=12\nCLIENT_Z_AXIS=100\n' +
+        '#-------------------------\n' +
+        'AUTO_APPEND=true\nAUTO_RUN=true\nAUTO_CLEAN=false\nAUTO_STOP=true\nAUTO_ZERO=000\n' +
+        'QUALITY=90%\nZOOM=100%\n',
+    );
+
+    expect(
+      stringifyTokens(
+        update(
+          [],
+          [
+            ['SERVER_HOST', '127.0.0.1'],
+            ['SERVER_PORT', '80'],
+            ['SERVER_LOGIN', 'root'],
+            ['CLIENT_LOGIN', 'john'],
+            ['CLIENT_X_AXIS', '12'],
+            ['AUTO_RUN', 'true'],
+            ['AUTO_CLEAN', 'false'],
+            ['CLIENT_ACCESS', 'limited'],
+            ['SERVER_OUTPUT', '/dev/null'],
+            ['CLIENT_Z_AXIS', '100'],
+            ['ZOOM', '100%'],
+            ['AUTO_STOP', 'true'],
+            ['QUALITY', '90%'],
+            ['AUTO_APPEND', 'true'],
+            ['AUTO_ZERO', '000'],
+          ],
+          { modifyMode: ModifyMode.SMART_APPEND, noUpdate: true },
+        ),
+      ),
+    ).toEqual(
+      'AUTO_APPEND=true\nAUTO_CLEAN=false\nAUTO_RUN=true\nAUTO_STOP=true\nAUTO_ZERO=000\n' +
+        'CLIENT_ACCESS=limited\nCLIENT_LOGIN=john\nCLIENT_X_AXIS=12\nCLIENT_Z_AXIS=100\n' +
+        'QUALITY=90%\n' +
+        'SERVER_HOST=127.0.0.1\nSERVER_LOGIN=root\nSERVER_OUTPUT=/dev/null\nSERVER_PORT=80\n' +
+        'ZOOM=100%\n',
+    );
+
+    expect(
+      stringifyTokens(
+        update(
+          [
+            ctoken('###########'),
+            nltoken(),
+            ctoken('# Server'),
+            nltoken(),
+            ctoken('###########'),
+            nltoken('\n\n'),
+            vtoken('SERVER_HOST', '127.0.0.1'),
+            nltoken(),
+            vtoken('SERVER_PORT', '80'),
+            nltoken(),
+            vtoken('SERVER_LOGIN', 'root'),
+            nltoken('\n\n'),
+            ctoken('###########'),
+            nltoken(),
+            ctoken('# Client'),
+            nltoken(),
+            ctoken('###########'),
+            nltoken('\n\n'),
+            vtoken('CLIENT_LOGIN', 'john'),
+          ],
+          [['SERVER_LOGIN', 'debian'], { name: 'SERVER_PORT', value: '8080', comment: ' # debug only' }, ['SERVER_PASSWORD', 'secret']],
+          { modifyMode: ModifyMode.SMART_APPEND, noUpdate: true },
+        ),
+      ),
+    ).toEqual(
+      '###########\n# Server\n###########\n\nSERVER_HOST=127.0.0.1\nSERVER_PASSWORD=secret\nSERVER_PORT=80\nSERVER_LOGIN=root\n\n###########\n# Client\n###########\n\nCLIENT_LOGIN=john\n',
+    );
+  });
 });
 
 describe('Fixing token list', () => {

src/manipulation.ts

@@ -106,6 +106,9 @@ export function update(tokens: Token[], updateWith: VariableToUpdate[], config?:
     const updateVar: Variable | VariableToken = Array.isArray(u) ? { name: u[0], value: u[1] } : u;
     const tokenToUpdate = tokens.findIndex((t) => t.token === TokenType.VARIABLE && (t as VariableToken).name === updateVar.name);
     if (tokenToUpdate > -1) {
+      if (config?.noUpdate) {
+        return;
+      }
       // delete
       if (updateVar.value == null) {
         if (tokenToUpdate < tokens.length - 1 && tokens[tokenToUpdate + 1].token === TokenType.NEWLINE) {

src/parser.test.ts

@@ -9,7 +9,11 @@ describe('MultiLine format parser', () => {
     expect(parseMultiLine('VARNAME=value \t ')).toEqual([vtoken('VARNAME', 'value', '', '', '', ' \t ')]);
     expect(parseMultiLine('VARNAME=A:\\DYNA')).toEqual([vtoken('VARNAME', 'A:\\DYNA')]);
     expect(parseMultiLine('VARNAME=quote\'is"ok')).toEqual([vtoken('VARNAME', 'quote\'is"ok')]);
-    expect(() => parseMultiLine('VARNAME=value not escaped')).toThrow('PARSING FAILED');
+    expect(parseMultiLine('VARNAME=value not escaped')).toEqual([vtoken('VARNAME', 'value not escaped')]);
+    expect(parseMultiLine('VARNAME=    value not escaped')).toEqual([vtoken('VARNAME', 'value not escaped', '', '', '', '', '=    ')]);
+    expect(parseMultiLine('VARNAME=value not escaped  ')).toEqual([vtoken('VARNAME', 'value not escaped', '', '', '', '  ')]);
+    expect(parseMultiLine('VARNAME=this# is# value')).toEqual([vtoken('VARNAME', 'this# is# value')]);
+    expect(parseMultiLine('VARNAME= this# is# value  # and comment')).toEqual([vtoken('VARNAME', 'this# is# value', '', '  # and comment', '', '', '= ')]);
   });
 
   it('prop have defined names', () => {

src/parser.ts

@@ -13,15 +13,14 @@ const escapedStrSQ = nonEscapedValuePartSQ.or(escapedChar.map((v: string) => v.r
 const nonEscapedValuePartDQ = Parsimmon.regexp(/[^"\\]+/);
 const escapedStrDQ = nonEscapedValuePartDQ.or(escapedChar.map((v: string) => v.replace('\\"', '"').replace('\\\\', '\\'))).many();
 
-// to alow spaces in simple values: [^"'\s][^\s]*([^\S\r\n]+\S+)* -- but that wont work in BASH so we do not allowed unescaped spaces!
+const simpleValueNotQuoted = Parsimmon.regexp(/[^"'\s][^\s]*([^\S\r\n]+[^\s#][^\s]*)*/);
-const simpleValueWithoutSpacesAndQuotes = Parsimmon.regexp(/[^"'\s][^\s]*/);
 
 const valueWithSpacesDoubleQuoted = Parsimmon.seqObj<string, any>(['quote', doubleQuote], ['value', escapedStrDQ.map((v) => v.join(''))], doubleQuote);
 const valueWithSpacesSingleQuoted = Parsimmon.seqObj<string, any>(['quote', singleQuote], ['value', escapedStrSQ.map((v) => v.join(''))], singleQuote);
 const value = Parsimmon.alt(
   valueWithSpacesSingleQuoted,
   valueWithSpacesDoubleQuoted,
-  simpleValueWithoutSpacesAndQuotes.map((v) => ({ quote: '', value: v })),
+  simpleValueNotQuoted.map((v) => ({ quote: '', value: v })),
 ).desc('property value');
 const commentOpt = Parsimmon.regexp(/[^\S\r\n]+#[^\r\n]*/);
 const comment = Parsimmon.regexp(/[\n\r]*[^\S\r\n]*#[^\r\n]*/);

src/types.ts

@@ -35,6 +35,7 @@ export type Variable = {
 
 export type Config = {
   beautify?: boolean;
+  noUpdate?: boolean;
   enforceNewLineEnd?: boolean;
   modifyMode?: ModifyMode;
 };