.nh
.TH skopeo-list-tags(1)
.SH NAME
.PP
skopeo-list-tags - List image names in a transport-specific collection of images.

.SH SYNOPSIS
.PP
\fBskopeo list-tags\fP [\fIoptions\fP] \fIsource-image\fP

.PP
Return a list of tags from \fIsource-image\fP in a registry or a local docker-archive file.

.PP
\fIsource-image\fP name of the repository to retrieve a tag listing from or a local docker-archive file.

.SH OPTIONS
.PP
See also skopeo(1) for options placed before the subcommand name.

.PP
\fB--authfile\fP \fIpath\fP

.PP
Path of the authentication file. Default is ${XDG_RUNTIME_DIR}/containers/auth.json, which is set using \fBskopeo login\fR\&.
  If the authorization state is not found there, $HOME/.docker/config.json is checked, which is set using \fBdocker login\fR\&.

.PP
\fB--creds\fP \fIusername[:password]\fP for accessing the registry.

.PP
\fB--cert-dir\fP \fIpath\fP

.PP
Use certificates at \fIpath\fP (*\&.crt, *\&.cert, *\&.key) to connect to the registry.

.PP
\fB--help\fP, \fB-h\fP

.PP
Print usage statement

.PP
\fB--no-creds\fP

.PP
Access the registry anonymously.

.PP
\fB--registry-token\fP \fIBearer token\fP

.PP
Bearer token for accessing the registry.

.PP
\fB--retry-times\fP

.PP
The number of times to retry. Retry wait time will be exponentially increased based on the number of failed attempts.

.PP
\fB--tls-verify\fP=\fIbool\fP

.PP
Require HTTPS and verify certificates when talking to the container registry or daemon. Default to registry.conf setting.

.PP
\fB--username\fP

.PP
The username to access the registry.

.PP
\fB--password\fP

.PP
The password to access the registry.

.SH REPOSITORY NAMES
.PP
Repository names are transport-specific references as each transport may have its own concept of a "repository" and "tags".

.PP
This commands refers to repositories using a \fItransport\fP\fB:\fR\fIdetails\fP format. The following formats are supported:

.PP
\fBdocker://\fP\fIdocker-repository-reference\fP
  A repository in a registry implementing the "Docker Registry HTTP API V2". By default, uses the authorization state in either \fB$XDG_RUNTIME_DIR/containers/auth.json\fR, which is set using \fB(skopeo login)\fR\&. If the authorization state is not found there, \fB$HOME/.docker/config.json\fR is checked, which is set using \fB(docker login)\fR\&.
  A \fIdocker-repository-reference\fP is of the form: \fBregistryhost:port/repositoryname\fP which is similar to an \fIimage-reference\fP but with no tag or digest allowed as the last component (e.g no \fB:latest\fR or \fB@sha256:xyz\fR)

.EX
  Examples of valid docker-repository-references:
    "docker.io/myuser/myrepo"
    "docker.io/nginx"
    "docker.io/library/fedora"
    "localhost:5000/myrepository"

  Examples of invalid references:
    "docker.io/nginx:latest"
    "docker.io/myuser/myimage:v1.0"
    "docker.io/myuser/myimage@sha256:f48c4cc192f4c3c6a069cb5cca6d0a9e34d6076ba7c214fd0cc3ca60e0af76bb"

.EE

.PP
**docker-archive:path[:docker-reference]
  more than one images were stored in a docker save-formatted file.

.SH EXAMPLES
.SS Docker Transport
.PP
To get the list of tags in the "fedora" repository from the docker.io registry (the repository name expands to "library/fedora" per docker transport canonical form):

.EX
$ skopeo list-tags docker://docker.io/fedora
{
    "Repository": "docker.io/library/fedora",
    "Tags": [
        "20",
        "21",
        "22",
        "23",
        "24",
        "25",
        "26-modular",
        "26",
        "27",
        "28",
        "29",
        "30",
        "31",
        "32",
        "branched",
        "heisenbug",
        "latest",
        "modular",
        "rawhide"
    ]
}


.EE

.PP
To list the tags in a local host docker/distribution registry on port 5000, in this case for the "fedora" repository:

.EX
$ skopeo list-tags docker://localhost:5000/fedora
{
    "Repository": "localhost:5000/fedora",
    "Tags": [
        "latest",
        "30",
        "31"
    ]
}


.EE

.SS Docker-archive Transport
.PP
To list the tags in a local docker-archive file:

.EX
$ skopeo list-tags docker-archive:/tmp/busybox.tar.gz
{
    "Tags": [
        "busybox:1.28.3"
    ]
}

.EE

.PP
Also supports more than one tags in an archive:

.EX
$ skopeo list-tags docker-archive:/tmp/docker-two-images.tar.gz
{
    "Tags": [
        "example.com/empty:latest",
        "example.com/empty/but:different"
    ]
}

.EE

.PP
Will include a source-index entry for each untagged image:

.EX
$ skopeo list-tags docker-archive:/tmp/four-tags-with-an-untag.tar
{
    "Tags": [
        "image1:tag1",
        "image2:tag2",
        "@2",
        "image4:tag4"
    ]
}

.EE


.SH SEE ALSO
.PP
skopeo(1), skopeo-login(1), docker-login(1), containers-auth.json(5), containers-transports(1)

.SH AUTHORS
.PP
Zach Hill zach@anchore.com
\[la]mailto:zach@anchore.com\[ra]