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201 lines (179 loc) · 4.72 KB
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const fs = require("fs");
const path = require("path");
const os = require("os");
const cpy = require("cpy");
const watch = require("@cnakazawa/watch");
const { execSync } = require("child_process");
class WebExtReact {
constructor() {
this.buildNum = 0;
}
get buildPath() {
return path.join(process.cwd(), "build", "static");
}
get assetManifestPath() {
return path.join("build", "asset-manifest.json");
}
get extensionPath() {
return "extension";
}
get tmp() {
this._tmp =
this._tmp || fs.mkdtempSync(path.join(os.tmpdir(), "web-ext-react-"));
return this._tmp;
}
get htmlTemplate() {
return `<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<!-- INSERT-HEAD -->
</head>
<body>
<div id="root"></div>
<!-- INSERT-BODY -->
</body>
</html>`;
}
contentByExtension(ext) {
const assetManifest = JSON.parse(fs.readFileSync(this.assetManifestPath));
return assetManifest.entrypoints.filter(
(filepath) => path.extname(filepath) === ext
);
}
buildApp() {
execSync("yarn run react-scripts build");
}
get extManifest() {
if (this._extManifest) {
return this._extManifest;
}
if (fs.existsSync(this.assetManifestPath)) {
this._extManifest = JSON.parse(
fs.readFileSync(path.join(this.extensionPath, "manifest.json"))
);
}
return this._extManifest;
}
async buildExt() {
if (this.extManifest) {
this.addContentScript();
await this.bundleExt();
this.addHtml();
this.buildNum++;
return this.tmp;
}
}
addHtml() {
// https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/Anatomy_of_a_WebExtension#Sidebars_popups_options_pages
[
"background",
"page_action",
"sidebar_action",
"browser_action",
"options_ui",
].forEach((data) => {
if (this.extManifest[data]) {
let page =
this.extManifest[data].page ||
this.extManifest[data].default_popup ||
this.extManifest[data].default_panel;
data = data.replace("_", "-");
fs.writeFileSync(`${this.tmp}/${page}`, this.html(data));
this.writeHelperScriptContents(data);
}
});
}
addContentScript() {
if (
this.extManifest.content_scripts &&
this.extManifest.content_scripts[0]
) {
this.extManifest.content_scripts[0].js = this.contentByExtension(".js");
this.extManifest.content_scripts[0].js.unshift(
this.helperScriptFileName("content_scripts")
);
this.writeHelperScriptContents("content_scripts");
this.extManifest.content_scripts[0].css = this.contentByExtension(".css");
}
}
html(scriptType) {
let scriptJs = this.contentByExtension(".js")
.map(this.scriptTag)
.join("\n");
scriptJs = `${this.scriptTag(
this.helperScriptFileName(scriptType)
)}\n${scriptJs}`;
const linkCss = this.contentByExtension(".css")
.map((str) => `<link rel="stylesheet" href="${str}"/>`)
.join("\n");
return this.htmlTemplate
.replace("<!-- INSERT-HEAD -->", linkCss)
.replace("<!-- INSERT-BODY -->", scriptJs);
}
scriptTag(src) {
return `<script src="${src}"></script>`;
}
helperScriptFileName(scriptType) {
const name = scriptType.replace("_", "-");
return `is-${name}.js`;
}
writeHelperScriptContents(scriptType) {
// add helper script for identifying what context script being called from
const name = scriptType
.replace("_", "-")
.replace(/\b\w/g, (c) => c.toUpperCase())
.replace("-", "");
fs.writeFileSync(
path.join(this.tmp, this.helperScriptFileName(scriptType)),
`document.is${name}=true`
);
}
async bundleExt() {
await cpy(".", path.join(this.tmp), {
parents: true,
cwd: this.extensionPath,
});
// overwrite extension manifest
fs.writeFileSync(
path.join(this.tmp, "manifest.json"),
JSON.stringify(this.extManifest)
);
await cpy(".", path.join(this.tmp, "static"), {
parents: true,
cwd: this.buildPath,
});
}
async build() {
this.buildApp();
const dir = await this.buildExt();
process.stdout.write(`${dir}\n`);
return dir;
}
run() {
this.watchAppSrc();
this.watchAppBuild();
}
watchAppSrc() {
watch.watchTree("src", () => {
this.buildApp();
});
}
watchAppBuild() {
watch.watchTree(
"build",
{
filter: (f) => {
return f === this.assetManifestPath;
},
},
async () => {
const sourceDir = await this.buildExt();
if (this.buildNum === 1) {
process.stdout.write(`${sourceDir}\n`);
}
}
);
}
}
module.exports = WebExtReact;