From c74b01e0b88c2ed819b617e41692221f2e5acd3c Mon Sep 17 00:00:00 2001
From: Fuwn <contact@fuwn.me>
Date: Fri, 11 Oct 2024 01:21:48 +0000
Subject: feat: initial release

---
 wiene.go | 188 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 188 insertions(+)
 create mode 100644 wiene.go

(limited to 'wiene.go')

diff --git a/wiene.go b/wiene.go
new file mode 100644
index 0000000..094c40b
--- /dev/null
+++ b/wiene.go
@@ -0,0 +1,188 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"strings"
+	"time"
+
+	"github.com/urfave/cli/v2"
+)
+
+func main() {
+	sources := Sources{}
+
+	(&cli.App{
+		Name:                 "wiene",
+		Usage:                "Nix Dependency Manager",
+		Description:          "Nix Dependency Manager",
+		EnableBashCompletion: true,
+		Authors: []*cli.Author{
+			{
+				Name:  "Fuwn",
+				Email: "contact@fuwn.me",
+			},
+		},
+		Before: func(c *cli.Context) error {
+			return sources.Load(c.String("sources"))
+		},
+		Flags: []cli.Flag{
+			&cli.StringFlag{
+				Name:  "sources",
+				Value: "./sources.json",
+				Usage: "Sources path",
+			},
+		},
+		Copyright: fmt.Sprintf("Copyright (c) 2024-%s Fuwn", fmt.Sprint(time.Now().Year())),
+		ExitErrHandler: func(c *cli.Context, err error) {
+			if err != nil {
+				fmt.Println(err)
+			}
+		},
+		Suggest: true,
+		Commands: []*cli.Command{
+			{
+				Name:      "update",
+				Args:      true,
+				Usage:     "Update one or all sources",
+				ArgsUsage: "[name]",
+				Flags: []cli.Flag{
+					&cli.BoolFlag{
+						Name:  "unpack",
+						Usage: "Unpack the source into the Nix Store",
+					},
+				},
+				Action: func(c *cli.Context) error {
+					if c.Args().Len() == 0 {
+						for key, value := range sources {
+							sha256, err := fetchSHA256(value.Url, value.Unpack)
+
+							if err != nil {
+								return err
+							}
+
+							if sha256 != value.SHA256 {
+								sources[key] = Source{
+									Url:    value.Url,
+									SHA256: sha256,
+									Unpack: value.Unpack,
+								}
+
+								fmt.Println("updated hash for", key)
+							}
+
+							if err = sources.Save(c.String("sources")); err != nil {
+								return err
+							}
+						}
+					} else {
+						if !sources.Exists(c.Args().Get(0)) {
+							return fmt.Errorf("source does not exist")
+						}
+
+						sha256, err := fetchSHA256(sources[c.Args().Get(0)].Url, c.Bool("unpack"))
+
+						if err != nil {
+							return err
+						}
+
+						sources[c.Args().Get(0)] = Source{
+							Url:    sources[c.Args().Get(0)].Url,
+							SHA256: sha256,
+							Unpack: c.Bool("unpack"),
+						}
+
+						if err = sources.Save(c.String("sources")); err != nil {
+							return err
+						}
+					}
+
+					return nil
+				},
+			},
+			{
+				Name:  "drop",
+				Args:  true,
+				Usage: "Drop a source",
+				Action: func(c *cli.Context) error {
+					if c.Args().Len() == 0 {
+						return fmt.Errorf("invalid number of arguments")
+					}
+
+					if !sources.Exists(c.Args().Get(0)) {
+						return fmt.Errorf("source does not exist")
+					}
+
+					sources.Drop(c.Args().Get(0))
+
+					return sources.Save(c.String("sources"))
+				},
+			},
+			{
+				Name:      "add",
+				Args:      true,
+				ArgsUsage: "<name> <uri>",
+				Usage:     "Add a source",
+				Flags: []cli.Flag{
+					&cli.BoolFlag{
+						Name:  "unpack",
+						Usage: "Unpack the source into the Nix Store",
+					},
+				},
+				Action: func(c *cli.Context) error {
+					if c.Args().Len() != 2 {
+						return fmt.Errorf("invalid number of arguments")
+					}
+
+					if sources.Exists(c.Args().Get(0)) {
+						return fmt.Errorf("source already exists")
+					}
+
+					sha256, err := fetchSHA256(c.Args().Get(1), c.Bool("unpack"))
+
+					if err != nil {
+						return err
+					}
+
+					if err = sources.Add(c.Args().Get(0), Source{
+						Url:    c.Args().Get(1),
+						SHA256: sha256,
+						Unpack: c.Bool("unpack"),
+					}); err != nil {
+						return err
+					}
+
+					return sources.Save(c.String("sources"))
+				},
+			},
+		},
+	}).Run(os.Args)
+}
+
+func fetchSHA256(uri string, unpack bool) (string, error) {
+	arguments := []string{"--type", "sha256", uri}
+
+	if unpack {
+		arguments = append([]string{"--unpack"}, arguments...)
+	}
+
+	output, err := commandOutput("nix-prefetch-url", arguments...)
+
+	if err != nil {
+		return "", err
+	}
+
+	lines := strings.Split(output, "\n")
+
+	return strings.Trim(lines[len(lines)-2], "\n"), nil
+}
+
+func commandOutput(name string, args ...string) (string, error) {
+	cmd := exec.Command(name, args...)
+	cmd.Stdin = os.Stdin
+	cmd.Stderr = os.Stderr
+	out, err := cmd.Output()
+
+	return string(out), err
+}
-- 
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