feat: Initial commit.

filters.nu

@@ -0,0 +1,22 @@
+#!/usr/bin/env -S nu --stdin
+
+def "parse filter" [
+] {
+  $in | parse --regex '^(?<name>[^=]+)=(?<params>.*)' | first |
+  update params {|row| $row.params | parse --regex `(?<param>[^=]+)=(?<value>[^:]+):?` }
+}
+
+def "filter to-string" [] {
+  each { |filter| $'($filter.name)=($filter.params | format '{param}={value}')' } |
+  str join ':' 
+}
+
+def "complex-filters to-string" [
+  --pretty-print (-p)
+]: table<input: list<string>, filters: table<name: string, params: table<param: string, value: string>>, output: string> -> string {
+    $in | update filters {
+      |$row| $row.filters | flatten | filter to-string
+    } | update input { |row|
+      $row.input | str join ']['
+    } | format '[{input}]{filters}[{output}]' | str join (";" + (if $pretty_print { "\n"  } else { "" })) | str replace --all '[]' ''
+}