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Craft and deploy bulletproof embedded software
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Files
lib/nerves/artifact/providers/docker/image.ex
defmodule Nerves.Artifact.Providers.Docker.Image do
alias Nerves.Artifact.Providers.Docker
import Docker.Utils
def create(dockerfile, tag) do
cmd = "docker"
path = Path.dirname(dockerfile)
args = ["build", "--tag", "#{tag}", path]
shell_info "Create image"
if Mix.shell.yes?("The Nerves Docker provider needs to create the image.\nProceed? ") do
case Mix.Nerves.Utils.shell(cmd, args) do
{_, 0} -> :ok
_ -> Mix.raise "Nerves Docker provider could not create docker volume nerves_cache"
end
else
Mix.raise "Unable to use Nerves Docker provider without image"
end
end
def pull(tag) do
shell_info "Trying to pull image"
cmd = "docker"
args = ["pull", "#{tag}"]
case System.cmd(cmd, args, stderr_to_stdout: true) do
{<<"Cannot connect to the Docker daemon", _tail :: binary>>, _} ->
Mix.raise "Nerves Docker provider is unable to connect to docker daemon"
{_, 0} ->
true
{_reason, _} ->
false
end
end
def exists?(tag) do
cmd = "docker"
args = ["image", "ls", "#{tag}", "-q"]
case System.cmd(cmd, args, stderr_to_stdout: true) do
{"", _} ->
false
{<<"Cannot connect to the Docker daemon", _tail :: binary>>, _} ->
Mix.raise "Nerves Docker provider is unable to connect to docker daemon"
{_, 0} ->
true
end
end
end