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mob_dev
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Development tooling for the Mob mobile framework
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lib/mob_dev/download.ex
defmodule MobDev.Download do
@moduledoc false
# Tiny wrappers around `curl` and `tar` so the various downloaders
# (OTP, Python apple/android, MLX) don't all reimplement the same
# `System.cmd` + error pattern.
@doc """
Fetch `url` to `dest` via curl.
"""
@spec curl(String.t(), Path.t()) :: :ok | {:error, String.t()}
def curl(url, dest) do
case System.cmd("curl", ["-L", "--fail", "--progress-bar", "-o", dest, url],
stderr_to_stdout: false
) do
{_, 0} -> :ok
{out, rc} -> {:error, "curl failed (exit #{rc}): #{String.trim(out)}"}
end
end
@doc """
Extract `tarball` into `dest_dir` via `tar xzf`.
"""
@spec untar(Path.t(), Path.t()) :: :ok | {:error, String.t()}
def untar(tarball, dest_dir) do
case System.cmd("tar", ["xzf", tarball, "-C", dest_dir], stderr_to_stdout: true) do
{_, 0} -> :ok
{out, rc} -> {:error, "tar failed (exit #{rc}): #{String.trim(out)}"}
end
end
end