Initial version

diff --git a/.eslintrc b/.eslintrc
new file mode 100644 (file)
index 0000000..2b34ba8
--- /dev/null
+++ b/.eslintrc
@@ -0,0 +1,19 @@
+{
+  "parserOptions": {
+    "ecmaVersion": 2021
+  },
+  "extends": [
+    "@hapi/eslint-config-hapi"
+  ],
+  "rules": {
+    "indent": [
+      2,
+      2
+    ],
+    "no-undef": 2,
+    "require-yield": 0
+  },
+  "ignorePatterns": [
+    "tap-snapshots"
+  ]
+}

diff --git a/.gitignore b/.gitignore
new file mode 100644 (file)
index 0000000..3c3629e
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+node_modules

diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644 (file)
index 0000000..15c9f6d
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,13 @@
+# Changelog
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [1.0.0] - 2020-09-20
+### Added
+- Functionality to parse graphviz
+- Executable
+- Initial documentation
+
+[1.0.0]: https://gitlab.com/rbdr/graphviz-to-grafn/releases/tag/v1.0.0

diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
new file mode 100644 (file)
index 0000000..eef9a4c
--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1,19 @@
+# Contributing to graphviz-to-grafn
+
+Improvement to the codebase are welcome: whether it's for documentation,
+performance, legibility or to improve how useful it is.
+
+## How to contribute
+
+Above All: Be nice, always: with yourself and others.
+
+* Make sure the linter show no warnings or errors
+* ~Make sure the tests continue passing~ there's no tests atm
+* Update the CHANGELOG according to [keep a changelog][keep-a-changelog] standard
+* Update the README where appropriate
+* Update the version following [semantic versioning][semver]
+* Make the PRs directly to the master branch, and include context so we understand
+  why the contributions are being made.
+
+[semver]: https://semver.org/
+[keep-a-changelog]: https://keepachangelog.com/en/1.0.0/

diff --git a/LICENSE b/LICENSE
new file mode 100644 (file)
index 0000000..497db7d
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
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+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
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+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
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+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
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+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "{}"
+      replaced with your own identifying information. (Don't include
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+      file or class name and description of purpose be included on the
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+
+   Copyright 2018 Rubén Beltran del Río
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

diff --git a/README.md b/README.md
new file mode 100644 (file)
index 0000000..7316693
--- /dev/null
+++ b/README.md
@@ -0,0 +1,30 @@
+# Graphviz to Grafn
+
+Converts graphviz .dot files to [Grafn][grafn] javascript code. This lets you
+define your application flow using a diagram editor first, and then fill out
+the functionality.
+
+## How can I use it?
+
+### As a Library
+
+```javascript
+const Fs = require('fs/promises');
+const GraphvizToGrafn = require('grafn-to-graphviz');
+
+async function convert() {
+  const graphvizCode = await Fs.read('/path/to/graphviz.dot');
+  const grafnCode = await GraphvizToGrafn(graphvizCode.toString());
+
+  console.log(grafnCode); // will print the JS code
+}
+```
+
+### As a Binary
+
+```
+$ npm install -g graphviz-to-grafn
+$ cat ./path/to/graphviz.dot | g2g > grafn_code.js
+```
+
+[grafn]: https://gitlab.com/rbdr/grafn

diff --git a/bin/g2g b/bin/g2g
new file mode 100755 (executable)
index 0000000..ed8e312
--- /dev/null
+++ b/bin/g2g
@@ -0,0 +1,22 @@
+#!/usr/bin/env node
+
+'use strict';
+
+const GraphvizToGrafn = require('..');
+
+const stdin = process.stdin;
+let graphvizSource = '';
+
+stdin.setEncoding('utf8');
+
+stdin.on('data', function (chunk) {
+
+  graphvizSource += chunk;
+});
+
+stdin.on('end', function () {
+
+  console.log(GraphvizToGrafn(graphvizSource));
+});
+
+stdin.on('error', console.error);

diff --git a/lib/graphviz_to_grafn.js b/lib/graphviz_to_grafn.js
new file mode 100644 (file)
index 0000000..e001e12
--- /dev/null
+++ b/lib/graphviz_to_grafn.js
@@ -0,0 +1,64 @@
+'use strict';
+
+const DotParser = require('dotparser');
+
+const internals = {
+
+  // Extract vertices and dependencies
+
+  parseDotObject(entries) {
+
+    const vertices = new Set();
+    const dependencies = {};
+
+    entries.forEach((entry) => {
+
+      if (entry.node_id) {
+        vertices.add(entry.node_id.id);
+      }
+
+      if (entry.edge_list) {
+        vertices.add(entry.edge_list[0].id);
+        vertices.add(entry.edge_list[1].id);
+
+        dependencies[entry.edge_list[1].id] = dependencies[entry.edge_list[1].id] || new Set();
+        dependencies[entry.edge_list[1].id].add(entry.edge_list[0].id);
+      }
+
+    });
+
+    return {
+      vertices,
+      dependencies
+    };
+  },
+
+  // Generate grafn code from a list of vertices and dependencies
+
+  generateCode(vertices, dependencies) {
+
+    const code = ['const Grafn = require(\'grafn\')', 'const graph = new Grafn()'];
+
+    for (const vertex of vertices) {
+      const vertexDependencies = Array.from(dependencies[vertex] || []);
+
+      code.push('graph.vertex({');
+      code.push(`  name: '${vertex}',`);
+      code.push(`  dependencies: ${JSON.stringify(vertexDependencies).replace(/"/g, '\'')},`);
+      code.push('  action: async () => {}');
+      code.push('});');
+    }
+
+    return code.join('\n');
+  }
+};
+
+// Take some dot source code... make it grafn source code.
+
+module.exports = function graphvizToGrafn(dotSource) {
+
+  const dotObject = DotParser(dotSource);
+  const { vertices, dependencies } = internals.parseDotObject(dotObject[0].children);
+
+  return internals.generateCode(vertices, dependencies);
+};

diff --git a/package-lock.json b/package-lock.json
new file mode 100644 (file)
index 0000000..cccba5c
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,922 @@
+{
+  "name": "graphviz-to-grafn",
+  "version": "1.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "@babel/code-frame": {
+      "version": "7.10.4",
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+      "dev": true,
+      "requires": {
+        "@babel/highlight": "^7.10.4"
+      }
+    },
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+      }
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diff --git a/package.json b/package.json
new file mode 100644 (file)
index 0000000..e9bb86b
--- /dev/null
+++ b/package.json
@@ -0,0 +1,34 @@
+{
+  "name": "graphviz-to-grafn",
+  "version": "1.0.0",
+  "description": "Convert a graphviz graph to grafn code",
+  "main": "lib/graphviz_to_grafn",
+  "scripts": {
+    "lint": "eslint ."
+  },
+  "bin": {
+    "g2g": "./bin/g2g"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+ssh://git@gitlab.com/rbdr/graphviz-to-grafn.git"
+  },
+  "bugs": {
+    "url": "https://gitlab.com/rbdr/graphviz-to-grafn/issues"
+  },
+  "author": "Rubén Beltrán del Río <ruben@unlimited.pizza>",
+  "license": "Apache-2.0",
+  "devDependencies": {
+    "@hapi/eslint-config-hapi": "^13.0.2",
+    "@hapi/eslint-plugin-hapi": "^4.3.6",
+    "eslint": "^7.9.0"
+  },
+  "keywords": [
+    "graph",
+    "async",
+    "flow"
+  ],
+  "dependencies": {
+    "dotparser": "^1.0.0"
+  }
+}