Merge pull request #775 from stgraber/main

sources: Add NixOS

doc/reference/source.md

@@ -29,6 +29,7 @@ It needs to be one of
 * `fedora-http`
 * `funtoo-http`
 * `gentoo-http`
+* `nixos-http`
 * `openeuler-http`
 * `opensuse-http`
 * `openwrt-http`

shared/definition.go

@@ -383,6 +383,7 @@ func (d *Definition) Validate() error {
 		"rockylinux-http",
 		"vyos-http",
 		"slackware-http",
+		"nixos-http",
 	}
 
 	if !util.ValueInSlice(strings.TrimSpace(d.Source.Downloader), validDownloaders) {

sources/nixos-http.go

@@ -0,0 +1,28 @@
+package sources
+
+import (
+	"fmt"
+	"path/filepath"
+
+	"github.com/lxc/distrobuilder/shared"
+)
+
+type nixos struct {
+	common
+}
+
+func (s *nixos) Run() error {
+	tarballURL := fmt.Sprintf("https://hydra.nixos.org/job/nixos/trunk-combined/nixos.lxdContainerImage.%s-linux/latest/download-by-type/file/system-tarball", s.definition.Image.ArchitectureMapped)
+
+	fpath, err := s.DownloadHash(s.definition.Image, tarballURL, "", nil)
+	if err != nil {
+		return fmt.Errorf("Failed downloading tarball: %w", err)
+	}
+
+	err = shared.Unpack(filepath.Join(fpath, "system-tarball"), s.rootfsDir)
+	if err != nil {
+		return fmt.Errorf("Failed unpacking rootfs: %w", err)
+	}
+
+	return nil
+}

sources/source.go

@@ -36,6 +36,7 @@ var downloaders = map[string]func() downloader{
 	"fedora-http":          func() downloader { return &fedora{} },
 	"funtoo-http":          func() downloader { return &funtoo{} },
 	"gentoo-http":          func() downloader { return &gentoo{} },
+	"nixos-http":           func() downloader { return &nixos{} },
 	"openeuler-http":       func() downloader { return &openEuler{} },
 	"opensuse-http":        func() downloader { return &opensuse{} },
 	"openwrt-http":         func() downloader { return &openwrt{} },