Add gen command

gen.go

@@ -0,0 +1,46 @@
+package main
+
+import (
+	"os"
+
+	"github.com/urfave/cli/v2"
+	"lure.sh/lure/pkg/gen"
+)
+
+var genCmd = &cli.Command{
+	Name:    "generate",
+	Usage:   "Generate a LURE script from a template",
+	Aliases: []string{"gen"},
+	Subcommands: []*cli.Command{
+		genPipCmd,
+	},
+}
+
+var genPipCmd = &cli.Command{
+	Name:  "pip",
+	Usage: "Generate a LURE script for a pip module",
+	Flags: []cli.Flag{
+		&cli.StringFlag{
+			Name:     "name",
+			Aliases:  []string{"n"},
+			Required: true,
+		},
+		&cli.StringFlag{
+			Name:     "version",
+			Aliases:  []string{"v"},
+			Required: true,
+		},
+		&cli.StringFlag{
+			Name:    "description",
+			Aliases: []string{"d"},
+			Value:   "A Python Pip module",
+		},
+	},
+	Action: func(c *cli.Context) error {
+		return gen.Pip(os.Stdout, gen.PipOptions{
+			Name:        c.String("name"),
+			Version:     c.String("version"),
+			Description: c.String("description"),
+		})
+	},
+}

main.go

@@ -62,8 +62,9 @@ var app = &cli.App{
 		removerepoCmd,
 		refreshCmd,
 		fixCmd,
-		versionCmd,
+		genCmd,
 		helperCmd,
+		versionCmd,
 	},
 	Before: func(c *cli.Context) error {
 		ctx := c.Context

pkg/gen/funcs.go

@@ -0,0 +1,9 @@
+package gen
+
+import "text/template"
+
+var funcs = template.FuncMap{
+	"firstchar": func(s string) string {
+		return s[:1]
+	},
+}

pkg/gen/pip.go

@@ -0,0 +1,57 @@
+package gen
+
+import (
+	_ "embed"
+	"fmt"
+	"io"
+	"net/http"
+	"path"
+	"text/template"
+)
+
+//go:embed tmpls/pip.tmpl.sh
+var pipTmpl string
+
+type PipOptions struct {
+	Name        string
+	Version     string
+	Description string
+}
+
+func Pip(w io.Writer, opts PipOptions) error {
+	tmpl, err := template.New("pip").
+		Funcs(funcs).
+		Parse(pipTmpl)
+	if err != nil {
+		return err
+	}
+
+	params := map[string]any{
+		"name":        opts.Name,
+		"version":     opts.Version,
+		"description": opts.Description,
+	}
+
+	url := fmt.Sprintf(
+		"https://files.pythonhosted.org/packages/source/%s/%s/%s-%s.tar.gz",
+		opts.Name[:1],
+		opts.Name,
+		opts.Name,
+		opts.Version,
+	)
+
+	res, err := http.Head(url)
+	if err != nil {
+		return err
+	}
+
+	dir := path.Dir(res.Request.URL.Path)
+	checksum := path.Base(dir)
+	dir = path.Dir(dir)
+	checksum = path.Base(dir) + checksum
+	dir = path.Dir(dir)
+	checksum = path.Base(dir) + checksum
+	params["checksum"] = "blake2b-256:" + checksum
+
+	return tmpl.Execute(w, params)
+}

pkg/gen/tmpls/pip.tmpl.sh

@@ -0,0 +1,33 @@
+name='{{.name}}'
+version='{{.version}}'
+release='1'
+desc='{{.description}}'
+homepage='https://example.com'
+maintainer='Example <user@example.com>'
+architectures=('all')
+license=('custom:Unknown')
+provides=('{{.name}}')
+conflicts=('{{.name}}')
+
+deps=("python3")
+deps_arch=("python")
+deps_alpine=("python3")
+
+build_deps=("python3" "python3-setuptools")
+build_deps_arch=("python" "python-setuptools")
+build_deps_alpine=("python3" "py3-setuptools")
+
+sources=("https://files.pythonhosted.org/packages/source/{{.name | firstchar}}/{{.name}}/{{.name}}-${version}.tar.gz")
+checksums=('{{.checksum}}')
+
+build() {
+	cd "$srcdir/{{.name}}-${version}"
+	python3 setup.py build
+}
+
+package() {
+	cd "$srcdir/{{.name}}-${version}"
+	python3 setup.py install --root="${pkgdir}/" --optimize=1 || return 1
+}
+
+