motiejus/undocker
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update README and misc files

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Motiejus Jakštys 2021-05-24 00:11:58 +03:00
parent 6c24b7f833
commit 2f484824fb
4 changed files with 8 additions and 5 deletions
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2
README.md
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@ -17,7 +17,7 @@ tools: lxc, systemd-nspawn or systemd itself.
Usage -- extract docker image Usage -- extract docker image
----------------------------- -----------------------------
Download `nginx` docker image from docker hub and convert it to a rootfs: Download `busybox` docker image from docker hub and convert it to a rootfs:
``` ```
skopeo copy docker://docker.io/busybox:latest docker-archive:busybox.tar skopeo copy docker://docker.io/busybox:latest docker-archive:busybox.tar

2
main.go
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@ -11,7 +11,7 @@ import (
) )
const _usage = `Usage: const _usage = `Usage:
%s <INFILE> <OUTFILE> %s <infile> <outfile>
Flatten a Docker container image to a root file system. Flatten a Docker container image to a root file system.

4
main_test.go
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@ -44,12 +44,12 @@ func TestExecute(t *testing.T) {
{ {
name: "infile does not exist", name: "infile does not exist",
infile: "t3-does-not-exist.txt", infile: "t3-does-not-exist.txt",
wantErr: "^open .*t3-does-not-exist.txt: no such file or directory$", wantErr: "^open .*not-exist.txt: no such file or directory$",
}, },
{ {
name: "outpath dir not writable", name: "outpath dir not writable",
outfile: filepath.Join("t4", "does", "not", "exist"), outfile: filepath.Join("t4", "does", "not", "exist"),
wantErr: "^create: open .*/t4/does/not/exist: no such file or directory", wantErr: "^create: open .*not/exist: no such file or directory",
}, },
} }

5
rootfs/rootfs.go
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@ -229,7 +229,10 @@ func whiteoutDirs(whreaddir map[string]int, nlayers int) []*tree {
} }
// validateManifest // validateManifest
func validateManifest(layerOffsets map[string]int64, manifest dockerManifestJSON) error { func validateManifest(
layerOffsets map[string]int64,
manifest dockerManifestJSON,
) error {
if len(manifest) == 0 { if len(manifest) == 0 {
return fmt.Errorf("empty or missing manifest") return fmt.Errorf("empty or missing manifest")
} }