44 lines
1.2 KiB
Text
Executable file
44 lines
1.2 KiB
Text
Executable file
#! /usr/bin/env nix-shell
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#! nix-shell -p typst dmtx-utils nushell -i nu
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def append-if [cond: bool, item: any] {
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if $cond { $in | append $item } else { $in }
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}
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def get-chunked-key [keyid?: string] {
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let flags = [
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"--export-secret-key", "--export-options", "export-minimal"
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] | append-if ($keyid != null) $keyid
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let key = (gpg ...$flags)
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let length = ($key | bytes length)
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# 1555 is the maximum length in bytes split data evenly
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let n = ($length / (($length / 1555)| math ceil)) | math ceil
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0..$n..$length
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| each {|i| $key | bytes at $i..<($i + $n)}
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}
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def generate-typst-doc [tmp: string, length: int] {
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0..<$length
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| each { |i|
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let path = $tmp
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| path join $"dmtx-($i).svg"
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| path relative-to $env.PWD
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['#image("', $path, '")'] | str join
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}
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| str join "\n"
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}
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def main [keyid?: string, outfile = "dmtxdata.pdf"] {
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let tmpdir = mktemp -d -p . -t tmp.key-2-matrix-XXX
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let byte_chunks = get-chunked-key $keyid
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$byte_chunks | enumerate | each {|it|
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$it.item | dmtxwrite -e 8 -o ($tmpdir | path join $"dmtx-($it.index).svg")
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}
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let doc = generate-typst-doc $tmpdir ($byte_chunks | length)
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$doc | typst compile - $outfile
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rm -r $tmpdir
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}
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