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chore: print error messages instead of unreachable #208

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Jul 8, 2024
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chore: print error messages instead of unreachable #208

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12 changes: 9 additions & 3 deletions DocGen4/Output.lean
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Original file line number Diff line number Diff line change
Expand Up @@ -108,9 +108,15 @@ def htmlOutputIndex (baseConfig : SiteBaseContext) : IO Unit := do
for entry in ← System.FilePath.readDir declarationsBasePath do
if entry.fileName.startsWith "declaration-data-" && entry.fileName.endsWith ".bmp" then
let fileContent ← FS.readFile entry.path
let .ok jsonContent := Json.parse fileContent | unreachable!
let .ok (module : JsonModule) := fromJson? jsonContent | unreachable!
index := index.addModule module |>.run baseConfig
match Json.parse fileContent with
| .error err =>
throw <| IO.userError s!"failed to parse file '{entry.path}' as json: {err}"
| .ok jsonContent =>
match fromJson? jsonContent with
| .error err =>
throw <| IO.userError s!"failed to parse file '{entry.path}': {err}"
| .ok (module : JsonModule) =>
index := index.addModule module |>.run baseConfig

let finalJson := toJson index
-- The root JSON for find
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