Martino Ferrari
132 lines
4.2 KiB
Go
132 lines
4.2 KiB
Go
package main
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import (
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"fmt"
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"os"
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"path/filepath"
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"github.com/evanw/esbuild/pkg/api"
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)
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func main() {
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// Determine repo root.
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// When invoked via `go generate` from web/, cwd is web/ so we look for go.mod
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// to find the actual module root.
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root, err := findModuleRoot()
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if err != nil {
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panic(err)
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}
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// Verify vendor files exist
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vendorFiles := []string{
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filepath.Join(root, "web", "vendor", "preact.mjs"),
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filepath.Join(root, "web", "vendor", "preact-hooks.mjs"),
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filepath.Join(root, "web", "vendor", "uplot.esm.js"),
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filepath.Join(root, "web", "vendor", "uplot.css"),
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filepath.Join(root, "web", "vendor", "echarts.esm.js"),
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}
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for _, f := range vendorFiles {
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if _, err := os.Stat(f); os.IsNotExist(err) {
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fmt.Fprintf(os.Stderr, "error: vendor file missing: %s\n", f)
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fmt.Fprintf(os.Stderr, "Run the following to download vendor files:\n")
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fmt.Fprintf(os.Stderr, " mkdir -p web/vendor\n")
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fmt.Fprintf(os.Stderr, " curl -sL https://cdn.jsdelivr.net/npm/preact@10.24.3/dist/preact.module.js -o web/vendor/preact.mjs\n")
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fmt.Fprintf(os.Stderr, " curl -sL https://cdn.jsdelivr.net/npm/preact@10.24.3/hooks/dist/hooks.module.js -o web/vendor/preact-hooks.mjs\n")
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fmt.Fprintf(os.Stderr, " curl -sL https://cdn.jsdelivr.net/npm/uplot@1.6.32/dist/uPlot.esm.js -o web/vendor/uplot.esm.js\n")
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fmt.Fprintf(os.Stderr, " curl -sL https://cdn.jsdelivr.net/npm/uplot@1.6.32/dist/uPlot.min.css -o web/vendor/uplot.css\n")
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fmt.Fprintf(os.Stderr, " curl -sL https://cdn.jsdelivr.net/npm/echarts@5.5.1/dist/echarts.esm.min.js -o web/vendor/echarts.esm.js\n")
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os.Exit(1)
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}
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}
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// Clean + create dist
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distDir := filepath.Join(root, "web", "dist")
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os.RemoveAll(distDir)
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os.MkdirAll(distDir, 0o755)
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result := api.Build(api.BuildOptions{
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EntryPoints: []string{filepath.Join(root, "web", "src", "main.tsx")},
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Bundle: true,
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Outdir: distDir,
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Format: api.FormatESModule,
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Target: api.ES2020,
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JSX: api.JSXTransform,
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JSXFactory: "h",
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JSXFragment: "Fragment",
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MinifyWhitespace: true,
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MinifyIdentifiers: true,
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MinifySyntax: true,
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Alias: map[string]string{
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"preact": filepath.Join(root, "web", "vendor", "preact.mjs"),
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"preact/hooks": filepath.Join(root, "web", "vendor", "preact-hooks.mjs"),
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"uplot": filepath.Join(root, "web", "vendor", "uplot.esm.js"),
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"echarts": filepath.Join(root, "web", "vendor", "echarts.esm.js"),
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},
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Loader: map[string]api.Loader{
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".css": api.LoaderCSS,
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},
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Splitting: false,
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Write: true,
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LogLevel: api.LogLevelInfo,
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})
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if len(result.Errors) > 0 {
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for _, e := range result.Errors {
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fmt.Fprintf(os.Stderr, "error: %s\n", e.Text)
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}
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os.Exit(1)
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}
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// Copy uPlot CSS and favicon
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copyFile(filepath.Join(root, "web", "vendor", "uplot.css"), filepath.Join(distDir, "uplot.css"))
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copyFile(filepath.Join(root, "web", "public", "favicon.svg"), filepath.Join(distDir, "favicon.svg"))
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copyFile(filepath.Join(root, "web", "public", "favicon.svg"), filepath.Join(distDir, "favicon.ico"))
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// Write index.html
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html := `<!doctype html>
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<html lang="en">
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<head>
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<meta charset="UTF-8" />
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<meta name="viewport" content="width=device-width, initial-scale=1.0" />
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<title>uopi</title>
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<link rel="icon" href="/favicon.ico" sizes="any" />
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<link rel="icon" type="image/svg+xml" href="/favicon.svg" />
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<link rel="stylesheet" href="/uplot.css" />
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<link rel="stylesheet" href="/main.css" />
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</head>
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<body>
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<div id="app"></div>
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<script type="module" src="/main.js"></script>
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</body>
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</html>`
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os.WriteFile(filepath.Join(distDir, "index.html"), []byte(html), 0o644)
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fmt.Println("Frontend built successfully →", distDir)
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}
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func copyFile(src, dst string) {
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data, err := os.ReadFile(src)
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if err != nil {
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return // Skip if missing
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}
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os.WriteFile(dst, data, 0o644)
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}
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// findModuleRoot walks up from cwd until it finds a go.mod file.
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func findModuleRoot() (string, error) {
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dir, err := os.Getwd()
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if err != nil {
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return "", err
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}
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for {
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if _, err := os.Stat(filepath.Join(dir, "go.mod")); err == nil {
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return dir, nil
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}
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parent := filepath.Dir(dir)
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if parent == dir {
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return "", fmt.Errorf("go.mod not found in any parent directory")
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}
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dir = parent
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}
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}
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