[taler-wallet-core] 01/04: build tools

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sebasjm pushed a commit to branch master
in repository wallet-core.

commit ebf91aef1d4bde5373ff689daa80c6bf9fe3167b
Author: Sebastian <sebasjm@gmail.com>
AuthorDate: Mon Apr 24 10:56:45 2023 -0300

    build tools
---
 packages/web-util/build.mjs          |  34 ++++++-
 packages/web-util/package.json       |   5 +
 packages/web-util/src/index.build.ts | 188 +++++++++++++++++++++++++++++++++++
 3 files changed, 226 insertions(+), 1 deletion(-)

diff --git a/packages/web-util/build.mjs b/packages/web-util/build.mjs
index 6e20b8b92..8e74f69c7 100755
--- a/packages/web-util/build.mjs
+++ b/packages/web-util/build.mjs
@@ -65,6 +65,35 @@ const buildConfigBase = {
   },
 }
 
+/**
+ * Build time libraries, under node runtime
+ */
+const buildConfigBuild = {
+  ...buildConfigBase,
+  entryPoints: ["src/index.build.ts"],
+  outExtension: {
+    '.js': '.mjs'
+  },
+  format: 'esm',
+  platform: 'node',
+  external: ["esbuild"],
+  // https://github.com/evanw/esbuild/issues/1921
+  // How to fix "Dynamic require of "os" is not supported"
+  // esbuild cannot convert external "static" commonjs require statements to 
static esm imports
+  banner: { 
+    js: `
+    import { fileURLToPath } from 'url';
+    import { createRequire as topLevelCreateRequire } from 'module';
+    const require = topLevelCreateRequire(import.meta.url);
+    const __filename = fileURLToPath(import.meta.url);
+    const __dirname = path.dirname(__filename);
+`
+  },
+};
+
+/**
+ * Development libraries, under node runtime
+ */
 const buildConfigNode = {
   ...buildConfigBase,
   entryPoints: ["src/index.node.ts", "src/cli.ts"],
@@ -76,6 +105,9 @@ const buildConfigNode = {
   external: ["preact"],
 };
 
+/**
+ * Support libraries, under browser runtime
+ */
 const buildConfigBrowser = {
   ...buildConfigBase,
   entryPoints: ["src/tests/mock.ts", "src/tests/swr.ts", 
"src/index.browser.ts", "src/live-reload.ts", 'src/stories.tsx'],
@@ -89,7 +121,7 @@ const buildConfigBrowser = {
   jsxFragment: 'Fragment',
 };
 
-[buildConfigNode, buildConfigBrowser].forEach((config) => {
+[buildConfigNode, buildConfigBrowser, buildConfigBuild].forEach((config) => {
   esbuild
     .build(config)
     .catch((e) => {
diff --git a/packages/web-util/package.json b/packages/web-util/package.json
index f89d0bb73..77f71c7bb 100644
--- a/packages/web-util/package.json
+++ b/packages/web-util/package.json
@@ -21,6 +21,10 @@
       "types": "./lib/index.browser.js",
       "default": "./lib/index.browser.mjs"
     },
+    "./lib/index.build": {
+      "types": "./lib/index.build.js",
+      "default": "./lib/index.build.mjs"
+    },
     "./lib/index.node": {
       "types": "./lib/index.node.js",
       "default": "./lib/index.node.cjs"
@@ -48,6 +52,7 @@
     "rimraf": "^3.0.2",
     "swr": "2.0.3",
     "tslib": "^2.4.0",
+    "sass": "1.56.1",
     "typescript": "^4.9.4",
     "ws": "7.4.5"
   },
diff --git a/packages/web-util/src/index.build.ts 
b/packages/web-util/src/index.build.ts
new file mode 100644
index 000000000..02e6886ab
--- /dev/null
+++ b/packages/web-util/src/index.build.ts
@@ -0,0 +1,188 @@
+import esbuild from "esbuild";
+import path from "path";
+import fs from "fs";
+import sass from "sass";
+import { PluginBuild } from "esbuild";
+
+// this should give us the current directory where
+// the project is being built
+const BASE = process.cwd();
+const distProd = path.join(BASE, "dist", "prod");
+const distDev = path.join(BASE, "dist", "dev");
+const sourceDir = path.join(BASE, "src");
+
+const preact = path.join(
+  BASE,
+  "node_modules",
+  "preact",
+  "compat",
+  "dist",
+  "compat.module.js",
+);
+
+// 
https://preactjs.com/guide/v8/switching-to-preact/#how-to-alias-preact-compat
+const preactCompatPlugin: esbuild.Plugin = {
+  name: "preact-compat",
+  setup(build) {
+    build.onResolve({ filter: /^(react-dom|react)$/ }, (args) => {
+      return {
+        path: preact,
+      };
+    });
+  },
+};
+
+export function getFilesInSource(regex: RegExp): string[] {
+  return getFilesInDirectory(sourceDir, regex);
+}
+
+function getFilesInDirectory(startPath: string, regex: RegExp): string[] {
+  if (!fs.existsSync(startPath)) {
+    return [];
+  }
+  const files = fs.readdirSync(startPath);
+  const result = files
+    .flatMap((file) => {
+      const filename = path.join(startPath, file);
+
+      const stat = fs.lstatSync(filename);
+      if (stat.isDirectory()) {
+        return getFilesInDirectory(filename, regex);
+      }
+      if (regex.test(filename)) {
+        return [filename];
+      }
+      return [];
+    })
+    .filter((x) => !!x);
+
+  return result;
+}
+
+let GIT_ROOT = BASE;
+while (!fs.existsSync(path.join(GIT_ROOT, ".git")) && GIT_ROOT !== "/") {
+  GIT_ROOT = path.join(GIT_ROOT, "../");
+}
+if (GIT_ROOT === "/") {
+  // eslint-disable-next-line no-undef
+  console.log("not found");
+  // eslint-disable-next-line no-undef
+  process.exit(1);
+}
+const GIT_HASH = GIT_ROOT === "/" ? undefined : git_hash();
+
+const buf = fs.readFileSync(path.join(BASE, "package.json"));
+let _package = JSON.parse(buf.toString("utf-8"));
+
+function git_hash() {
+  const rev = fs
+    .readFileSync(path.join(GIT_ROOT, ".git", "HEAD"))
+    .toString()
+    .trim()
+    .split(/.*[: ]/)
+    .slice(-1)[0];
+  if (rev.indexOf("/") === -1) {
+    return rev;
+  } else {
+    return fs.readFileSync(path.join(GIT_ROOT, ".git", rev)).toString().trim();
+  }
+}
+
+// FIXME: Put this into some helper library.
+function copyFilesPlugin(files: Array<string>) {
+  return {
+    name: "copy-files",
+    setup(build: PluginBuild) {
+      const outDir = build.initialOptions.outdir;
+      if (outDir === undefined)
+        throw Error("esbuild build options does not specify outdir");
+      build.onEnd(() => {
+        for (const file of files) {
+          const name = path.parse(file).base;
+          fs.copyFileSync(file, path.join(outDir, name));
+        }
+      });
+    },
+  };
+}
+
+const DEFAULT_SASS_FILTER = /\.(s[ac]ss|css)$/;
+
+const buildSassPlugin: esbuild.Plugin = {
+  name: "custom-build-sass",
+  setup(build) {
+    build.onLoad({ filter: DEFAULT_SASS_FILTER }, ({ path: file }) => {
+      const resolveDir = path.dirname(file);
+      const { css: contents } = sass.compile(file, { loadPaths: ["./"] });
+
+      return {
+        resolveDir,
+        loader: "css",
+        contents,
+      };
+    });
+  },
+};
+
+const buildConfig: esbuild.BuildOptions = {
+  bundle: true,
+  minify: false,
+  loader: {
+    ".svg": "file",
+    ".png": "dataurl",
+    ".jpeg": "dataurl",
+    ".ttf": "file",
+    ".woff": "file",
+    ".woff2": "file",
+    ".eot": "file",
+  },
+  target: ["es6"],
+  format: "esm",
+  platform: "browser",
+  sourcemap: true,
+  jsxFactory: "h",
+  jsxFragment: "Fragment",
+  define: {
+    __VERSION__: `"${_package.version}"`,
+    __GIT_HASH__: `"${GIT_HASH}"`,
+  },
+  plugins: [
+    preactCompatPlugin,
+    copyFilesPlugin(["./src/index.html"]),
+    buildSassPlugin,
+  ],
+};
+
+/**
+ * Build sources for prod environment
+ */
+export function buildProd(entryPoints: string[]) {
+  return esbuild.build({
+    ...buildConfig,
+    entryPoints,
+    outdir: distProd,
+  });
+}
+
+/**
+ * Build sources for dev environment
+ */
+function buildDev(entryPoints: string[]): Promise<esbuild.BuildResult> {
+  return esbuild.build({
+    ...buildConfig,
+    entryPoints,
+    outdir: distDev,
+  });
+}
+
+/**
+ * Do startup for development environment
+ */
+export function initializeDev(
+  entryPoints: string[],
+): () => Promise<esbuild.BuildResult> {
+  buildConfig.inject = [
+    "./node_modules/@gnu-taler/web-util/lib/live-reload.mjs",
+  ];
+  return () => buildDev(entryPoints);
+}

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