-
Notifications
You must be signed in to change notification settings - Fork 9
/
makesquashfs.go
105 lines (82 loc) · 2.91 KB
/
makesquashfs.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
// Copyright 2022 Namespace Labs Inc; All rights reserved.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
package binary
import (
"context"
"fmt"
"os"
"os/exec"
"path/filepath"
"strings"
"github.com/google/go-containerregistry/pkg/v1/empty"
"github.com/google/go-containerregistry/pkg/v1/mutate"
"namespacelabs.dev/foundation/internal/artifacts/oci"
"namespacelabs.dev/foundation/internal/build"
"namespacelabs.dev/foundation/internal/compute"
"namespacelabs.dev/foundation/internal/console"
"namespacelabs.dev/foundation/internal/runtime/rtypes"
"namespacelabs.dev/foundation/std/pkggraph"
"namespacelabs.dev/foundation/std/tasks/idtypes"
)
type makeSquashFS struct {
spec build.Spec
target string
}
func (m makeSquashFS) BuildImage(ctx context.Context, env pkggraph.SealedContext, conf build.Configuration) (compute.Computable[oci.Image], error) {
inner, err := m.spec.BuildImage(ctx, env, conf)
if err != nil {
return nil, err
}
return compute.Transform("binary.make_squashfs", inner, func(ctx context.Context, img oci.Image) (oci.Image, error) {
dir, err := os.MkdirTemp("", "squashfs")
if err != nil {
return nil, err
}
x := filepath.Join(dir, m.target)
if err := os.MkdirAll(filepath.Dir(x), 0755); err != nil {
return nil, err
}
defer os.RemoveAll(dir)
if err := ToLocalSquashFS(ctx, img, x); err != nil {
return nil, err
}
layer, err := oci.LayerFromFS(ctx, os.DirFS(dir))
if err != nil {
return nil, err
}
return mutate.AppendLayers(empty.Image, layer)
}), nil
}
func (m makeSquashFS) PlatformIndependent() bool { return m.spec.PlatformIndependent() }
func runCommandMaybeNixShell(ctx context.Context, io rtypes.IO, pkg, command string, args ...string) error {
if _, err := exec.LookPath("nix-shell"); err == nil {
return runNixShell(ctx, io, pkg, command, args)
}
loc, err := exec.LookPath(command)
if err != nil {
return err
}
return runRawCommand(ctx, io, loc, args...)
}
func runRawCommand(ctx context.Context, io rtypes.IO, command string, args ...string) error {
fmt.Fprintf(console.Debug(ctx), "Running: %s %s\n", command, strings.Join(args, " "))
cmd := exec.CommandContext(ctx, command, args...)
cmd.Stdin = io.Stdin
cmd.Stdout = io.Stdout
cmd.Stderr = io.Stderr
return cmd.Run()
}
func runNixShell(ctx context.Context, io rtypes.IO, pkg, command string, args []string) error {
return runRawCommand(ctx, io, "nix-shell", "-p", pkg, "--run", strings.Join(append([]string{command}, args...), " "))
}
func ToLocalSquashFS(ctx context.Context, image oci.Image, target string) error {
r := mutate.Extract(image)
defer r.Close()
out := console.TypedOutput(ctx, "tar2sqfs", idtypes.CatOutputTool)
if err := runCommandMaybeNixShell(ctx, rtypes.IO{Stdin: r, Stdout: out, Stderr: out},
"squashfs-tools-ng", "tar2sqfs", "-f", target); err != nil {
return err
}
return nil
}