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# my tail is 16 inches long
# and its between my legs
fn file_lines(path) -> table | :nil do
const size = fs:size(path)
if (size < 0)
return :nil
const contents = if (size > 0) fs:read_bytes(path, 0, size) else ""
const raw_lines = contents:split("\n")
let result = {}
for index in 0..raw_lines:len() do
if (index < raw_lines:len() - 1 or raw_lines[index]:len() > 0)
result:push(raw_lines[index])
end
return result
end
const context = env.ctx
if context.argv:len() < 2 do
fail("usage: tail [n] <path>\n")
end else do
let limit = 10
let path_arg = context.argv[1]
if context.argv:len() >= 3 and parse_pid(context.argv[1]) >= 0 do
limit = parse_pid(context.argv[1])
path_arg = context.argv[2]
end
const lines = file_lines(expand_path(path_arg))
if lines == :nil do
fail("tail: no such file\n")
end else do
let start = lines:len() - limit
if (start < 0)
start = 0
for index in start..lines:len() do puts("#{lines[index]}\n") end
end
end
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