podman manifest exists

Add podman manifest exists command with remote support.

Signed-off-by: Paul Holzinger <paul.holzinger@web.de>

1 files changed, 43 insertions, 0 deletions

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+% podman-manifest-exists(1)
+
+## NAME
+podman\-manifest\-exists - Check if the given manifest list exists in local storage
+
+## SYNOPSIS
+**podman manifest exists** *manifest*
+
+## DESCRIPTION
+**podman manifest exists** checks if a manifest list exists on local storage. Podman will
+return an exit code of `0` when the manifest is found. A `1` will be returned otherwise.
+An exit code of `125` indicates there was another issue.
+
+
+## OPTIONS
+
+#### **--help**, **-h**
+
+Print usage statement.
+
+## EXAMPLE
+
+Check if a manifest list called `list1` exists (the manifest list does actually exist).
+```
+$ podman manifest exists list1
+$ echo $?
+0
+$
+```
+
+Check if an manifest called `mylist` exists (the manifest list does not actually exist).
+```
+$ podman manifest exists mylist
+$ echo $?
+1
+$
+```
+
+## SEE ALSO
+podman(1), podman-manifest-create(1), podman-manifest-remove(1)
+
+## HISTORY
+January 2021, Originally compiled by Paul Holzinger `<paul.holzinger@web.de>`