Tidy project

.gitignore

@@ -0,0 +1 @@
+node_modules/

README.md

@@ -0,0 +1,14 @@
+# Rockstar Playground
+
+## Purpose
+To make it easy to develop Rockstar solutions to Advent of Code style problems (with an input file and no interactivity).
+
+## Setup
+`npm install`
+
+## Usage
+`node start <trackname>`
+Rock source code named `<trackname>.rock` will be used first from the `lyrics` folder, or else from the `contracts` folder (intended for un-poetic works in progress). File input is expected as `<trackname>.txt` in the `music` folder.
+
+### Development
+`npx nodemon start <trackname>` will re-run the program whenever it is altered.

contracts/2020-02.rock

@@ -0,0 +1,6 @@
+Rock Input
+Listen to Line
+Until Line is gone
+  Rock Input with Line
+  Listen to Line
+(end until)

music/2020-02.txt

@@ -0,0 +1,3 @@
+1-3 a: abcde
+1-3 b: cdefg
+2-9 c: ccccccccc

node_modules/.package-lock.json

@@ -1,16 +0,0 @@
-{
-  "name": "advent-of-code-2020-rockstar",
-  "version": "1.0.0",
-  "lockfileVersion": 2,
-  "requires": true,
-  "packages": {
-    "node_modules/n-readlines": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/n-readlines/-/n-readlines-1.0.1.tgz",
-      "integrity": "sha512-z4SyAIVgMy7CkgsoNw7YVz40v0g4+WWvvqy8+ZdHrCtgevcEO758WQyrYcw3XPxcLxF+//RszTz/rO48nzD0wQ==",
-      "engines": {
-        "node": ">=6.x.x"
-      }
-    }
-  }
-}

node_modules/n-readlines/.travis.yml

@@ -1,6 +0,0 @@
-language: node_js
-os:
-    - linux
-    - osx
-node_js:
-    - "6"

node_modules/n-readlines/LICENSE

@@ -1,20 +0,0 @@
-The MIT License (MIT)
-
-Copyright (c) 2013 Liucw
-
-Permission is hereby granted, free of charge, to any person obtaining a copy of
-this software and associated documentation files (the "Software"), to deal in
-the Software without restriction, including without limitation the rights to
-use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
-the Software, and to permit persons to whom the Software is furnished to do so,
-subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
-FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
-COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
-IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

node_modules/n-readlines/README.md

@@ -1,53 +0,0 @@
-[![Build Status](https://travis-ci.org/nacholibre/node-readlines.svg)](https://travis-ci.org/nacholibre/node-readlines)
-# node-readlines
-Reading file line by line may seem like a trivial problem, but in node, there is no straightforward way to do it. There are a lot of libraries using Transform Streams to achieve it, but it seems like a overkill, so I've wrote simple version using only the `filesystem` module of node. Note that this is *synchronous* library.
-
-Install with
-`npm install n-readlines`
-
----------------------------------------
-
-## Documentation
-### new readlines(filename, [options]);
-### new readlines(fd, [options]);
-
-**Arguments**
-
-* `filename` - String path to the file you want to read from
-* `fd` - File descriptor
-* `options` - Object
-  * `readChunk` - Integer number of bytes to read at once. Default: 1024
-  * `newLineCharacter` - String new line character, only works with one byte characters for now. Default: `\n` which is `0x0a` hex encoded
-
-`node-readlines` can handle files without newLineCharacter after the last line
-
----------------------------------------
-
-### readlines.next()
-Returns `buffer` with the line data without the `newLineCharacter` or `false` if end of file is reached.
-
----------------------------------------
-### readlines.reset()
-Resets the pointer and starts from the beginning of the file. This works only if the end is not reached.
-
----------------------------------------
-### readlines.close()
-Manually close the open file, subsequent `next()` calls will return false. This works only if the end is not reached.
-
----------------------------------------
-
-## Example
-```javascript
-const lineByLine = require('n-readlines');
-const liner = new lineByLine('./test/fixtures/normalFile.txt');
-
-let line;
-let lineNumber = 0;
-
-while (line = liner.next()) {
-    console.log('Line ' + lineNumber + ': ' + line.toString('ascii'));
-    lineNumber++;
-}
-
-console.log('end of line reached');
-```

node_modules/n-readlines/example.js

@@ -1,14 +0,0 @@
-'use strict';
-
-const lineByLine = require('./readlines.js');
-const liner = new lineByLine('./test/fixtures/normalFile.txt');
-
-let line;
-let lineNumber = 0;
-
-while (line = liner.next()) {
-    console.log('Line ' + lineNumber + ': ' + line.toString('ascii'));
-    lineNumber++;
-}
-
-console.log('end of line reached');

node_modules/n-readlines/package.json

@@ -1,34 +0,0 @@
-{
-  "name": "n-readlines",
-  "version": "1.0.1",
-  "description": "Read file line by line without buffering the whole file in memory.",
-  "main": "./readlines.js",
-  "dependencies": {},
-  "repository": {
-    "type": "git",
-    "url": "http://github.com/nacholibre/node-readlines.git"
-  },
-  "keywords": [
-    "read",
-    "line",
-    "reader",
-    "linereader",
-    "readfile",
-    "linebyline",
-    "synchronous",
-    "sync",
-    "readline",
-    "readlines"
-  ],
-  "engines": {
-    "node": ">=6.x.x"
-  },
-  "devDependencies": {
-    "tape": "^4.9.0"
-  },
-  "scripts": {
-    "test": "tape test/*.test.js"
-  },
-  "author": "Yoan Arnaudov <jonidev@gmail.com>",
-  "license": "MIT"
-}

node_modules/n-readlines/readlines.js

@@ -1,159 +0,0 @@
-'use strict';
-
-const fs = require('fs');
-
-/**
- * @class
- */
-class LineByLine {
-    constructor(file, options) {
-        options = options || {};
-
-        if (!options.readChunk) options.readChunk = 1024;
-
-        if (!options.newLineCharacter) {
-            options.newLineCharacter = 0x0a; //linux line ending
-        } else {
-            options.newLineCharacter = options.newLineCharacter.charCodeAt(0);
-        }
-
-        if (typeof file === 'number') {
-            this.fd = file;
-        } else {
-            this.fd = fs.openSync(file, 'r');
-        }
-
-        this.options = options;
-
-        this.newLineCharacter = options.newLineCharacter;
-
-        this.reset();
-    }
-
-    _searchInBuffer(buffer, hexNeedle) {
-        let found = -1;
-
-        for (let i = 0; i <= buffer.length; i++) {
-            let b_byte = buffer[i];
-            if (b_byte === hexNeedle) {
-                found = i;
-                break;
-            }
-        }
-
-        return found;
-    }
-
-    reset() {
-        this.eofReached = false;
-        this.linesCache = [];
-        this.fdPosition = 0;
-    }
-
-    close() {
-        fs.closeSync(this.fd);
-        this.fd = null;
-    }
-
-    _extractLines(buffer) {
-        let line;
-        const lines = [];
-        let bufferPosition = 0;
-
-        let lastNewLineBufferPosition = 0;
-        while (true) {
-            let bufferPositionValue = buffer[bufferPosition++];
-
-            if (bufferPositionValue === this.newLineCharacter) {
-                line = buffer.slice(lastNewLineBufferPosition, bufferPosition);
-                lines.push(line);
-                lastNewLineBufferPosition = bufferPosition;
-            } else if (bufferPositionValue === undefined) {
-                break;
-            }
-        }
-
-        let leftovers = buffer.slice(lastNewLineBufferPosition, bufferPosition);
-        if (leftovers.length) {
-            lines.push(leftovers);
-        }
-
-        return lines;
-    };
-
-    _readChunk(lineLeftovers) {
-        let totalBytesRead = 0;
-
-        let bytesRead;
-        const buffers = [];
-        do {
-            const readBuffer = new Buffer(this.options.readChunk);
-
-            bytesRead = fs.readSync(this.fd, readBuffer, 0, this.options.readChunk, this.fdPosition);
-            totalBytesRead = totalBytesRead + bytesRead;
-
-            this.fdPosition = this.fdPosition + bytesRead;
-
-            buffers.push(readBuffer);
-        } while (bytesRead && this._searchInBuffer(buffers[buffers.length-1], this.options.newLineCharacter) === -1);
-
-        let bufferData = Buffer.concat(buffers);
-
-        if (bytesRead < this.options.readChunk) {
-            this.eofReached = true;
-            bufferData = bufferData.slice(0, totalBytesRead);
-        }
-
-        if (totalBytesRead) {
-            this.linesCache = this._extractLines(bufferData);
-
-            if (lineLeftovers) {
-                this.linesCache[0] = Buffer.concat([lineLeftovers, this.linesCache[0]]);
-            }
-        }
-
-        return totalBytesRead;
-    }
-
-    next() {
-        if (!this.fd) return false;
-
-        let line = false;
-
-        if (this.eofReached && this.linesCache.length === 0) {
-            return line;
-        }
-
-        let bytesRead;
-
-        if (!this.linesCache.length) {
-            bytesRead = this._readChunk();
-        }
-
-        if (this.linesCache.length) {
-            line = this.linesCache.shift();
-
-            const lastLineCharacter = line[line.length-1];
-
-            if (lastLineCharacter !== this.newLineCharacter) {
-                bytesRead = this._readChunk(line);
-
-                if (bytesRead) {
-                    line = this.linesCache.shift();
-                }
-            }
-        }
-
-        if (this.eofReached && this.linesCache.length === 0) {
-            this.close();
-        }
-
-        if (line && line[line.length-1] === this.newLineCharacter) {
-            line = line.slice(0, line.length-1);
-        }
-
-        return line;
-    }
-}
-
-module.exports = LineByLine;

node_modules/n-readlines/test/fixtures/badEndFile.txt

@@ -1,2 +0,0 @@
-google.com
-yahoo.com

node_modules/n-readlines/test/fixtures/noNewLinesFile.txt

@@ -1 +0,0 @@
-no new line

node_modules/n-readlines/test/fixtures/normalFile.txt

@@ -1,3 +0,0 @@
-google.com
-yahoo.com
-yandex.ru

node_modules/n-readlines/test/fixtures/twoLineFile.txt

@@ -1,2 +0,0 @@
-hello
-hello2

node_modules/n-readlines/test/fixtures/withEmptyLines.txt

@@ -1,5 +0,0 @@
-hello
-hello4
-
-hello2
-hello3

node_modules/n-readlines/test/readlines.test.js

@@ -1,132 +0,0 @@
-'use strict';
-
-const lineByLine = require('../readlines.js');
-const path = require('path');
-const test = require('tape');
-
-test('should get all lines', (t) => {
-    const liner = new lineByLine(path.resolve(__dirname, 'fixtures/twoLineFile.txt'));
-
-    t.equals(liner.next().toString('ascii'), 'hello', 'line 0: hello');
-    t.equals(liner.next().toString('ascii'), 'hello2', 'line 1: hello2');
-    t.equals(liner.next(), false, 'line 3: false');
-    t.equals(liner.next(), false, 'line 4: false');
-    t.equals(liner.fd, null, 'fd null');
-    t.end();
-});
-
-test('should get all lines even if the file doesnt end with new line', (t) => {
-    const liner = new lineByLine(path.resolve(__dirname, 'fixtures/badEndFile.txt'));
-
-    t.equals(liner.next().toString('ascii'), 'google.com', 'line 0: google.com');
-    t.equals(liner.next().toString('ascii'), 'yahoo.com', 'line 1: yahoo.com');
-    t.equals(liner.next(), false, 'line 3: false');
-    t.equals(liner.fd, null, 'fd is null');
-    t.end();
-});
-
-test('should get all lines if there is no new lines', (t) => {
-    const liner = new lineByLine(path.resolve(__dirname, 'fixtures/noNewLinesFile.txt'));
-
-    t.equals(liner.next().toString('ascii'), 'no new line', 'line 0: no new line');
-    t.equals(liner.next(), false, 'line 1: false');
-    t.equals(liner.fd, null, 'fd is null');
-    t.end();
-});
-
-test('should handle empty files', (t) => {
-    const liner = new lineByLine(path.resolve(__dirname, 'fixtures/emptyFile.txt'));
-
-    t.equals(liner.next(), false, 'line 0: false');
-    t.equals(liner.fd, null, 'line 0: false');
-    t.end();
-});
-
-test('should read right between two chunks', (t) => {
-    const liner = new lineByLine(path.resolve(__dirname, 'fixtures/normalFile.txt'), {
-        readChunk: 16
-    });
-
-    t.equals(liner.next().toString('ascii'), 'google.com', 'line 0: google.com');
-    t.equals(liner.next().toString('ascii'), 'yahoo.com', 'line 1: yahoo.com');
-    t.equals(liner.next().toString('ascii'), 'yandex.ru', 'line 2: yandex.ru');
-    t.equals(liner.next(), false, 'line 3: false');
-    t.equals(liner.fd, null, 'fs is null');
-    t.end();
-});
-
-test('should read empty lines', (t) => {
-    const liner = new lineByLine(path.resolve(__dirname, 'fixtures/withEmptyLines.txt'));
-
-    t.equals(liner.next().toString('ascii'), 'hello', 'line 0: hello');
-    t.equals(liner.next().toString('ascii'), 'hello4', 'line 1: hello4');
-    t.equals(liner.next().toString('ascii'), '', 'line 2: ');
-    t.equals(liner.next().toString('ascii'), 'hello2', 'line 3: hello2');
-    t.equals(liner.next().toString('ascii'), 'hello3', 'line 4: hello3');
-    t.equals(liner.next(), false, 'line 5: false');
-    t.equals(liner.fd, null, 'fs is null');
-    t.end();
-});
-
-test('should reset and start from the beggining', (t) => {
-    const liner = new lineByLine(path.resolve(__dirname, 'fixtures/normalFile.txt'), {
-        readChunk: 16
-    });
-
-    t.equals(liner.next().toString('ascii'), 'google.com', 'line 0: google.com');
-    t.equals(liner.next().toString('ascii'), 'yahoo.com', 'line 1: yahoo.com');
-
-    liner.reset()
-
-    t.equals(liner.next().toString('ascii'), 'google.com', 'line 0: google.com');
-    t.equals(liner.next().toString('ascii'), 'yahoo.com', 'line 1: yahoo.com');
-    t.equals(liner.next().toString('ascii'), 'yandex.ru', 'line 2: yandex.ru');
-    t.equals(liner.next(), false, 'line 3: false');
-    t.equals(liner.fd, null, 'fd is null');
-    t.end();
-});
-
-test('should read big lines', (t) => {
-    const liner = new lineByLine(path.resolve(__dirname, 'fixtures/bigLines.json'));
-    
-
-    t.ok(JSON.parse(liner.next()), 'line 0: valid JSON');
-    t.ok(JSON.parse(liner.next()), 'line 1: valid JSON');
-    t.ok(JSON.parse(liner.next()), 'line 2: valid JSON');
-
-    t.equals(liner.next(), false, 'line 3: false');
-    t.equals(liner.fd, null, 'fd is null');
-    t.end();
-});
-
-test('Non-Latin Char JSON', (t) => {
-    const liner = new lineByLine(path.resolve(__dirname, 'fixtures/eiffel.geojson'));
-
-    t.ok(JSON.parse(liner.next().toString()), 'line 0: valid JSON');
-
-    t.equals(liner.fd, null, 'fd is null');
-    t.end();
-});
-
-test('Manually Close', (t) => {
-    const liner = new lineByLine(path.resolve(__dirname, 'fixtures/normalFile.txt'));
-
-    t.equals(liner.next().toString(), 'google.com', 'line 0: google.com');
-
-    liner.close();
-    t.equals(liner.fd, null, 'fd is null');
-
-    t.equals(liner.next(), false, 'line after close: false');
-    t.end();
-});
-
-test('should correctly processes NULL character in lines', (t) => {
-    const liner = new lineByLine(path.resolve(__dirname, 'fixtures/withNULL.txt'));
-
-    t.equals(liner.next().toString(), 'line without null', 'line 0: line without null');
-    t.equals(liner.next().toString(), 'line wi'+String.fromCharCode(0)+'th null', 'line 1: line with null');
-    t.equals(liner.next().toString(), 'another line without null', 'line 2: another line without null');
-
-    t.equals(liner.fd, null, 'fd is null');
-    t.end();
-})

package.json

@@ -10,5 +10,8 @@
   "license": "MIT",
   "dependencies": {
     "n-readlines": "^1.0.1"
+  },
+  "devDependencies": {
+    "nodemon": "^2.0.6"
   }
 }

start.js

@@ -1,26 +1,36 @@
-const trackNum = process.argv[2];
-if (!trackNum) { console.error('Usage: node start <daynumber>'); process.exit(1); }
+const trackNum = process.argv[2]
+if (!trackNum) { console.error('Usage: node start <daynumber>'); process.exit(1) }
 
-const satriani = require('./rockstar/satriani/satriani.js');
-const fs = require('fs');
-const lineByLine = require('n-readlines');
+const satriani = require('./rockstar/satriani/satriani.js')
+const path = require('path')
+const fs = require('fs')
+const lineByLine = require('n-readlines')
 
-const rockstar = new satriani.Interpreter();
-const program = fs.readFileSync(`lyrics/${trackNum}.rock`, {encoding:'utf8', flag:'r'});
-const inputByLine = new lineByLine(`inputs/${trackNum}.txt`, {encoding:'utf8', flag:'r'});
+const rockstar = new satriani.Interpreter()
+const source = path.normalize(
+  `${
+    fs.existsSync(path.normalize(`lyrics/${trackNum}.rock`))
+    ? 'lyrics'
+    : 'contracts'
+  }/${trackNum}.rock`)
+const program = fs.readFileSync(source, { encoding: 'utf8', flag: 'r' })
+const inputByLine = new lineByLine(
+  path.normalize(`music/${trackNum}.txt`),
+  { encoding: 'utf8', flag: 'r' }
+)
 const getNextInputLineAscii = () => {
-  const next = inputByLine.next();
+  const next = inputByLine.next()
   if (next === false) {
-    return null;
+    return null
   } else {
-    return next.toString('ascii');
+    return next.toString('ascii')
   }
 }
 
-const ast = rockstar.parse(program);
+const ast = rockstar.parse(program)
 // Draw the abstract syntax tree (AST) to the console as a JSON object
-//console.log(JSON.stringify(ast, null, 2))
+// console.log(JSON.stringify(ast, null, 2))
 
 const output = console.log
 const result = rockstar.run(ast, getNextInputLineAscii, output)
-if (result) console.log(result);
+if (result) console.log(result)