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Pretty print a policy #222

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Adds methods to pretty print policies similar to directory tree printing in Linux. Prints diff in colors which highlights the differences between the two policies.

Our representation of Semantic policies in only in Thresh, so we combine or(pk,or(pk,pk)) into thresh(1,pk,pk,pk). And so we use the latter in comparing two policies that complicate some of the implementation but is still fairly small.

(x, y) => {
let red = "\x1b[0;31m";
let nc = "\x1b[0m";
let green = "\x1b[0;32m";
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I think we need to come up with a different encoding scheme. It doesn't have to be pretty, we could provide a shellscript or something that converted it into a colorized version.

But using shell escape sequences means that we won't work on windows and are likely to confuse other command line tools.

sanket1729 added a commit to sanket1729/rust-miniscript that referenced this pull request Oct 1, 2021
e829434 Implemented Policy Diff (sanket1729)
4d23b79 Pretty print a policy (sanket1729)

Pull request description:

  Adds methods to pretty print policies similar to directory tree printing in Linux. Prints diff in colors which highlights the differences between the two policies.

  Our representation of Semantic policies in only in Thresh, so we combine `or(pk,or(pk,pk))` into `thresh(1,pk,pk,pk)`. And so we use the latter in comparing two policies that complicate some of the implementation but is still fairly small.

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Tree-SHA512: 8efd11b2c2582a4e26455ccb718d1ad2016ead3507746bd98a16240c7c72cf411df7fa01d817aee3a42c138b8ff7b887e7104d29d15f7a57a61620eee20a9d2b
}

/// Pretty Print a tree
pub fn pprint_tree(&self) {
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In 4d23b79:

Can we make this pub(crate)? I think we can come up with a much better API here and I'd rather not expose this one.

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2 participants