{"id":16389271,"url":"https://github.com/mmzeeman/acerl","last_synced_at":"2025-07-25T06:08:22.028Z","repository":{"id":141934879,"uuid":"491632505","full_name":"mmzeeman/acerl","owner":"mmzeeman","description":"WIP Experimental auth language for embedding in 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WIP Access Control for Erlang \n\nThis repository contains a scanner/parser for Rego, the policy language from OPA. \n\nI work on this in my spare time, so progress is slow.\n\n%% Integrating OPA\n\nRest API\n\n# Named policy decisions (data api)\n\n## /v1/data/\u003cpath\u003e \n\nDus als je een policy hebt\n\n```rego\npackage example.authz\n\ndefault allow := false\n\nallow {\n...\n```\n\nDan gebruik je de api als volgt\n\n```\nPOST /v1/data/example/authz/allow\n...\n```\n\n\n\n\n\n\n\n%% Inspiration\n\nhttps://www.openpolicyagent.org/docs/latest/policy-reference/#grammar\n\nGrammar\nhttps://github.com/antlr/grammars-v4/tree/rego\n\n```\nmodule          = package { import } policy\npackage         = \"package\" ref\nimport          = \"import\" ref [ \"as\" var ]\npolicy          = { rule }\nrule            = [ \"default\" ] rule-head { rule-body }\nrule-head       = var [ \"(\" rule-args \")\" ] [ \"[\" term \"]\" ] [ = term ]\nrule-args       = term { \",\" term }\nrule-body       = [ else [ = term ] ] \"{\" query \"}\"\nquery           = literal { \";\" | [\\r\\n] literal }\nliteral         = ( some-decl | expr | \"not\" expr ) { with-modifier }\nwith-modifier   = \"with\" term \"as\" term\nsome-decl       = \"some\" var { \",\" var }\nexpr            = term | expr-built-in | expr-infix\nexpr-built-in   = var [ \".\" var ] \"(\" [ term { , term } ] \")\"\nexpr-infix      = [ term \"=\" ] term infix-operator term\nterm            = ref | var | scalar | array | object | set | array-compr | object-compr | set-compr\narray-compr     = \"[\" term \"|\" rule-body \"]\"\nset-compr       = \"{\" term \"|\" rule-body \"}\"\nobject-compr    = \"{\" object-item \"|\" rule-body \"}\"\ninfix-operator  = bool-operator | arith-operator | bin-operator\nbool-operator   = \"=\" | \"!=\" | \"\u003c\" | \"\u003e\" | \"\u003e=\" | \"\u003c=\"\narith-operator  = \"+\" | \"-\" | \"*\" | \"/\"\nbin-operator    = \"\u0026\" | \"|\"\nref             = var { ref-arg }\nref-arg         = ref-arg-dot | ref-arg-brack\nref-arg-brack   = \"[\" ( scalar | var | array | object | set | \"_\" ) \"]\"\nref-arg-dot     = \".\" var\nvar             = ( ALPHA | \"_\" ) { ALPHA | DIGIT | \"_\" }\nscalar          = string | NUMBER | TRUE | FALSE | NULL\nstring          = STRING | raw-string\nraw-string      = \"`\" { CHAR-\"`\" } \"`\"\narray           = \"[\" term { \",\" term } \"]\"\nobject          = \"{\" object-item { \",\" object-item } \"}\"\nobject-item     = ( scalar | ref | var ) \":\" term\nset             = empty-set | non-empty-set\nnon-empty-set   = \"{\" term { \",\" term } \"}\"\nempty-set       = \"set(\" \")\"\n\n====\n\n[]     optional (zero or one instances)\n{}     repetition (zero or more instances)\n|      alternation (one of the instances)\n()     grouping (order of expansion)\nSTRING JSON string\nNUMBER JSON number\nTRUE   JSON true\nFALSE  JSON false\nNULL   JSON null\nCHAR   Unicode character\nALPHA  ASCII characters A-Z and a-z\nDIGIT  ASCII characters 0-9\nCR     Carriage Return\nLF     Line Feed\n```\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fmmzeeman%2Facerl","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fmmzeeman%2Facerl","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fmmzeeman%2Facerl/lists"}