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gulpfile.js
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gulpfile.js
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var gulp = require('gulp');
var fs = require('fs');
var sass = require('gulp-sass');
var replace = require('gulp-replace');
var rename = require('gulp-rename');
var showdown = require('showdown');
var converter = new showdown.Converter();
var server = require('gulp-server-livereload');
var registered_top_pages = [];
var registered_watchers = [];
var registered_link_replacements = [];
var registered_blog_entries = {};
var Mutex = require('async-mutex').Mutex;
const entriesFolder = 'entries/';
const buildFolder = 'build';
const fsExtra = require('fs-extra');
const blogMutex = new Mutex();
fsExtra.removeSync(buildFolder);
fsExtra.ensureDirSync(buildFolder);
showdown.setOption('strikethrough', true);
showdown.setOption('tables', true);
var scan_directory = function (folder, root) {
let files = fs.readdirSync(folder);
files.forEach(file => {
let fullPath = `${folder}`;
let relativePath = `${fullPath}`.replace(`${root}`, '');
let filename = `${file}`;
let fileAbsolutePath = `${folder}${file}`;
if (fs.statSync(fileAbsolutePath).isDirectory()){
scan_directory(`${fileAbsolutePath}/`, root);
} else {
let filenameTokens = fileAbsolutePath.split('.');
let filenameLabel = filenameTokens[0];
// ensure only markdown is parsed
if ( filenameTokens.length >= 2 && filenameTokens[1] === 'md'){
register_entry(filenameLabel, 'index', root, relativePath, filename);
}
}
});
}
var create_blog_history = function(root, buildPath, template){
let content = "";
let entryTemplate = fs.readFileSync(`templates/blog-entry.html`, "utf8");
let entryArray = [];
for (let key in registered_blog_entries) {
if (!registered_blog_entries.hasOwnProperty(key)) continue;
entryArray.push(registered_blog_entries[key]);
}
entryArray.sort((a, b) => {
if (a.timestamp > b.timestamp) {
return -1;
}
if (a.timestamp < b.timestamp) {
return 1;
}
return 0;
});
entryArray.forEach(entry => {
let modifiedContent = entryTemplate.replace("<timestamp/>", entry.timestampLabel);
modifiedContent = modifiedContent.replace("<contents/>", converter.makeHtml(entry.content));
modifiedContent = modifiedContent.replace("<link/>", entry.href);
content += modifiedContent;
content += `<br> <hr> <br>`;
});
gulp.src(`templates/${template}.html`)
.pipe(replace('<contents/>', content))
.pipe(rename({
dirname : "",
basename: 'blog',
extname: ".html"
}))
.pipe(gulp.dest(buildFolder));
}
var register_entry = function(label, template, root, directory, filename){
let inputFilePath = `${root}${directory}${filename}`;
let relativeOutputFilePath = `/${directory}${filename}`;
let basename = filename.split('.')[0];
gulp.task(label, function() {
let fileContent = fs.readFileSync(inputFilePath, "utf8");
// Detect all files to be copied and mark them
let linkedFilesRegex = /(\[[^(\]|\[)]*\]\()([^(:|(\(|\)))]*.[^(md)])(\))/g;
let match = linkedFilesRegex.exec(fileContent);
while (match != null) {
let sourceFilePath = `${root}${directory}${match[2]}`;
let destinationFilePath = `${buildFolder}/${directory}${match[2]}`;
try {
fsExtra.copySync(sourceFilePath, destinationFilePath);
} catch (err) {
console.error(err);
}
match = linkedFilesRegex.exec(fileContent);
}
// replace markdown links
let markdownLinkRegex = /(\[[^(\]|\[)]*\]\([^(\(|\))]*.)(md)(\))/g;
fileContent = fileContent.replace(markdownLinkRegex, "$1html$3");
// change relative to absolute routes
let documentLinkRegex = /(\[[^(\]|\[)]*\]\()([^((:)|((\(|\)))]*.[^(md)]\))/g;
fileContent = fileContent.replace(documentLinkRegex, `$1/${directory}$2`);
// if it is a blog entry, add it to the blog page
if(/^\/blog\//g.test(relativeOutputFilePath)){
let lines = fileContent.split("\n");
let entryContent = "";
// If you put a date comment anywhere, then it will be used as a date for the post.
let timestamp = /\[\/\/\]: # \((\w+ \w+ \d+ \d+:\d+:\d+ .\d+ \d+)\)/g.exec(fileContent);
let timestampLabel = "No Date";
if(timestamp !== null){
timestampLabel = timestamp[1];
timestamp = Date.parse(timestamp[1]);
} else {
timestamp = "0";
}
// concat all lines to generate the entry
entryContent = lines.slice(0, 4).join("\n");
registered_blog_entries[label] = {
timestamp: timestamp,
timestampLabel: timestampLabel,
content: entryContent,
href: `/${directory}${basename}.html`
};
blogMutex.acquire()
.then(function(release) {
create_blog_history(root, `${buildFolder}/`, template);
release();
});
}
return gulp.src(`templates/${template}.html`)
.pipe(replace('<contents/>', converter.makeHtml(fileContent)))
.pipe(rename({
dirname : directory,
basename: basename,
// prefix: "bonjour-",
// suffix: "-hola",
extname: ".html"
}))
.pipe(gulp.dest(buildFolder));
});
registered_top_pages.push(label);
registered_watchers.push({
input_file: inputFilePath,
trigger : [label]
});
registered_link_replacements.push(relativeOutputFilePath);
}
// this scans entries by default
scan_directory(entriesFolder, entriesFolder);
gulp.task('sass', function() {
gulp.src('*.scss')
.pipe(sass())
.pipe(gulp.dest(function(f) {
return `${f.base}build`;
}));
});
gulp.task('webserver', function() {
gulp.src('./build')
.pipe(server({
defaultFile: 'index.html',
livereload : true
// open: true
}));
});
gulp.task('default', ['sass', 'webserver', ...registered_top_pages], function() {
gulp.watch('*.scss', ['sass']);
registered_watchers.forEach(watched => {
gulp.watch(watched.input_file, watched.trigger);
});
});