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# move or rename a file
const context = env.ctx
if context.argv:len() < 3 do fail("usage: mv <source> <destination>\n") end
else do
const source = expand_path(context.argv[1])
const destination = expand_path(context.argv[2])
const size = fs:size(source)
if size < 0 do fail("mv: #{source}: no such file\n") end
else do
const contents = if size > 0 fs:read_bytes(source, 0, size) else ""
if fs:store(destination, contents) == 1 do fs:unlink(source) puts("#{source} -> #{destination}\n") end
end
end
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