update readme

1 files changed, 25 insertions, 4 deletions

diff --git a/Readme.md b/Readme.md
index bd81bf7..ceb582b 100644
--- a/Readme.md
+++ b/Readme.md
@@ -82,14 +82,27 @@ For now there are two (useful) scopes: `map` applies to tiled map links
 By default `walint` prints lints in a hopefully human-readable manner. Its exit
 code will be 1 if the maximum lint level set in its config was exceeded, and 0
 otherwise. Only in the latter case will it write out an adjusted map respository
-to the path passed to `--out`.
+to the path passed to `--out`. If the path given to `--out` already exists, 
+`walint` will print its normal output but refuse to write anything to that path,
+and exit with code 2.
 
 If the `--json` option is given, output to stdout will be printed as json, which
 should conform to the following schema (here defined in a quasi-haskell syntax):
 
 ```haskell
--- | The main type of walint's output
-type Output = 
+-- | The main output type. All json output will conform to it.
+type Output =
+  { severity :: Level
+  -- ^ the maximum Lint level that occurred
+  , result :: Result
+  -- ^ detailed lints in a structured way
+  , resultText :: String
+  -- ^ all lints in a human-readable text block
+  }
+
+
+-- | A detailed description of which errors occurred
+type Result = 
   { mapLints :: Map FilePath MapLint
   -- ^ an object of per-map lints. Each key is a filepath from the repository's root
   , missingAssets :: List Asset
@@ -116,7 +129,7 @@ type Where =
   -- ^ what is this lint's level?
   }
   
--- | Valid lint levels. Encoded as strings, listed in order here.
+-- | Valid lint levels. Encoded as strings, listed in ascending order here.
 data Level = Info | Suggestion | Warning | Forbidden | Error | Fatal
 
 
@@ -136,5 +149,13 @@ type Entrypoint =
   -- ^ list of filenames of maps which reference this entrypoint
   }
 
+-- | Lints that don't come grouped by place (for now, just those in generalLints)
+type Lint = 
+  { level :: Level
+  -- ^ this lint's level
+  , msg :: String
+  -- ^ a human-readable (single-line) message
+  }
+
 ```