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Parse a Kubernetes-style selector into a consumable tree in jq
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| def o(P):P//.; | |
| def k(P):o(P|k(P)); | |
| def w(P;f):(.r=[]|P) as $r|.s=$r.s|.r+=[$r.r|f]; | |
| def s($r):(.s|match("^(?:"+$r+")")) as $m|.s|=.[$m.length:]|.m=$m.string; | |
| def _:s(" *"); | |
| def r($r;f):s($r)|.r+=[.m|f]; | |
| def l($s):select(.s|startswith($s))|.s|=.[$s|length:]|_; | |
| "[a-zA-Z](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?" as $d| | |
| "(?:[a-zA-Z0-9](?:[a-zA-Z0-9_.-]{0,61}[a-zA-Z0-9])?)" as $l| | |
| def K:r("(?:\($d)(?:\\.\($d))*/)?"+$l;.)|_; | |
| def V:r($l+"?";.)|_; | |
| def X:(w(l("!")|K;{key:.[0],op:"DoesNotExist"})//w(K|o((r("==?|!=";{"==":"In","=":"In","!=":"NotIn"}[.])|_|w(V;.))//((r("notin";"NotIn")//r("in";"In"))|_|l("(")|w(o(select(isempty(l(")")))|V|k(l(",")|V));.)|l(")")));if length==3 then {key:.[0],op:.[1],value:.[2]} else {key:.[0],op:"Exists"} end))|_; | |
| {s:.,r:[]}|_|o(X|k(l(",")|X))|_|select(.s=="")|.r |
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