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0.5.7

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fnord lib cmd upgrade.ex
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lib/cmd/upgrade.ex

defmodule Cmd.Upgrade do
@behaviour Cmd
@impl Cmd
def spec do
[
upgrade: [
name: "upgrade",
about: "Upgrade fnord to the latest version",
flags: [
yes: [
long: "--yes",
short: "-y",
help: "Automatically answer 'yes' to all prompts",
default: false
]
]
]
]
end
@impl Cmd
def run(opts) do
if UI.confirm("Do you want to upgrade to the latest version of fnord?", opts.yes) do
System.cmd("mix", ["escript.install", "--force", "github", "sysread/fnord"],
stderr_to_stdout: true,
into: IO.stream(:stdio, :line)
)
else
IO.puts("Cancelled")
end
end
end