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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 = vfs:size(source)
if size < 0 do
fail("mv: #{source}: no such file\n")
end else do
const contents = if (size > 0) vfs:read_bytes(source, 0, size) else ""
if vfs:store(destination, contents) == 1 do
vfs:unlink(source)
puts("#{source} -> #{destination}\n")
end
end
end
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