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Merge pull request #43 from ocean/claude/audit-ecto-libsql-Cme33
Check over and improve Elixir code wherever possible
2 parents bdb216d + a3f06d1 commit 9e4e94f

25 files changed

Lines changed: 1387 additions & 258 deletions

‎.credo.exs‎

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# Credo configuration for EctoLibSql
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#
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# This configuration file specifies the rules and their strictness levels
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# for static code analysis with Credo.
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#
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# Run with: mix credo
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%{
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configs: [
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# ==========================================================================
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# Strict checks for library source files only
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# ==========================================================================
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%{
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name: "default",
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files: %{
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included: [
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"lib/"
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],
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excluded: [
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~r"/_build/",
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~r"/deps/",
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~r"/native/"
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]
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},
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plugins: [],
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requires: [],
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strict: false,
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parse_timeout: 5000,
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color: true,
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checks: %{
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enabled: [
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# ==========================================================================
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# Consistency Checks
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# ==========================================================================
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{Credo.Check.Consistency.ExceptionNames, []},
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{Credo.Check.Consistency.LineEndings, []},
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{Credo.Check.Consistency.ParameterPatternMatching, []},
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{Credo.Check.Consistency.SpaceAroundOperators, []},
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{Credo.Check.Consistency.SpaceInParentheses, []},
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{Credo.Check.Consistency.TabsOrSpaces, []},
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{Credo.Check.Consistency.UnusedVariableNames, [priority: :low]},
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# ==========================================================================
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# Design Checks
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# ==========================================================================
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{Credo.Check.Design.AliasUsage,
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[
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priority: :low,
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if_nested_deeper_than: 2,
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if_called_more_often_than: 2
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]},
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{Credo.Check.Design.DuplicatedCode, [priority: :low]},
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{Credo.Check.Design.TagFIXME, []},
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{Credo.Check.Design.TagTODO, [priority: :low]},
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# ==========================================================================
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# Readability Checks
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# ==========================================================================
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{Credo.Check.Readability.AliasOrder, []},
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{Credo.Check.Readability.BlockPipe, []},
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{Credo.Check.Readability.FunctionNames, []},
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{Credo.Check.Readability.ImplTrue, [priority: :low]},
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{Credo.Check.Readability.LargeNumbers, [priority: :low]},
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{Credo.Check.Readability.MaxLineLength, [priority: :low, max_length: 120]},
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{Credo.Check.Readability.ModuleAttributeNames, []},
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{Credo.Check.Readability.ModuleDoc, []},
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{Credo.Check.Readability.ModuleNames, []},
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{Credo.Check.Readability.MultiAlias, []},
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{Credo.Check.Readability.ParenthesesInCondition, []},
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{Credo.Check.Readability.ParenthesesOnZeroArityDefs, []},
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{Credo.Check.Readability.PipeIntoAnonymousFunctions, []},
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{Credo.Check.Readability.PredicateFunctionNames, [priority: :low]},
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{Credo.Check.Readability.PreferImplicitTry, []},
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{Credo.Check.Readability.RedundantBlankLines, []},
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{Credo.Check.Readability.Semicolons, []},
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{Credo.Check.Readability.SeparateAliasRequire, []},
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{Credo.Check.Readability.SingleFunctionToBlockPipe, []},
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{Credo.Check.Readability.SinglePipe, [priority: :low]},
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{Credo.Check.Readability.SpaceAfterCommas, []},
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{Credo.Check.Readability.Specs, [priority: :low]},
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{Credo.Check.Readability.StrictModuleLayout, [priority: :low]},
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{Credo.Check.Readability.StringSigils, []},
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{Credo.Check.Readability.TrailingBlankLine, []},
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{Credo.Check.Readability.TrailingWhiteSpace, []},
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{Credo.Check.Readability.UnnecessaryAliasExpansion, []},
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{Credo.Check.Readability.VariableNames, []},
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{Credo.Check.Readability.WithCustomTaggedTuple, []},
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# ==========================================================================
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# Refactoring Opportunities
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# ==========================================================================
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{Credo.Check.Refactor.Apply, []},
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{Credo.Check.Refactor.CondStatements, []},
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{Credo.Check.Refactor.CyclomaticComplexity, [max_complexity: 15]},
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{Credo.Check.Refactor.DoubleBooleanNegation, []},
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{Credo.Check.Refactor.FilterCount, [priority: :low]},
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{Credo.Check.Refactor.FilterFilter, []},
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{Credo.Check.Refactor.FilterReject, []},
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{Credo.Check.Refactor.FunctionArity, [max_arity: 8]},
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{Credo.Check.Refactor.IoPuts, []},
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{Credo.Check.Refactor.LongQuoteBlocks, []},
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{Credo.Check.Refactor.MapJoin, [priority: :low]},
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{Credo.Check.Refactor.MapMap, []},
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{Credo.Check.Refactor.MatchInCondition, []},
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{Credo.Check.Refactor.ModuleDependencies, [priority: :low, max_deps: 25]},
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{Credo.Check.Refactor.NegatedConditionsInUnless, []},
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{Credo.Check.Refactor.NegatedConditionsWithElse, []},
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{Credo.Check.Refactor.Nesting, [max_nesting: 4]},
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{Credo.Check.Refactor.PassAsyncInTestCases, []},
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{Credo.Check.Refactor.PipeChainStart, [priority: :low]},
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{Credo.Check.Refactor.RedundantWithClauseResult, []},
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{Credo.Check.Refactor.RejectFilter, []},
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{Credo.Check.Refactor.RejectReject, []},
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{Credo.Check.Refactor.UnlessWithElse, []},
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{Credo.Check.Refactor.WithClauses, []},
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# ==========================================================================
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# Warning Checks (most important - these indicate real problems)
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# ==========================================================================
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{Credo.Check.Warning.ApplicationConfigInModuleAttribute, []},
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{Credo.Check.Warning.BoolOperationOnSameValues, []},
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{Credo.Check.Warning.Dbg, []},
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{Credo.Check.Warning.ExpensiveEmptyEnumCheck, []},
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{Credo.Check.Warning.IExPry, []},
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{Credo.Check.Warning.IoInspect, []},
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{Credo.Check.Warning.LazyLogging, []},
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{Credo.Check.Warning.LeakyEnvironment, []},
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{Credo.Check.Warning.MapGetUnsafePass, []},
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{Credo.Check.Warning.MissedMetadataKeyInLoggerConfig, []},
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{Credo.Check.Warning.MixEnv, []},
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{Credo.Check.Warning.OperationOnSameValues, []},
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{Credo.Check.Warning.OperationWithConstantResult, []},
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{Credo.Check.Warning.RaiseInsideRescue, []},
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{Credo.Check.Warning.SpecWithStruct, []},
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{Credo.Check.Warning.UnsafeExec, []},
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{Credo.Check.Warning.UnsafeToAtom, []},
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{Credo.Check.Warning.UnusedEnumOperation, []},
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{Credo.Check.Warning.UnusedFileOperation, []},
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{Credo.Check.Warning.UnusedKeywordOperation, []},
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{Credo.Check.Warning.UnusedListOperation, []},
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{Credo.Check.Warning.UnusedPathOperation, []},
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{Credo.Check.Warning.UnusedRegexOperation, []},
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{Credo.Check.Warning.UnusedStringOperation, []},
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{Credo.Check.Warning.UnusedTupleOperation, []},
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{Credo.Check.Warning.WrongTestFileExtension, []}
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],
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disabled: [
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# Disabled globally - handled by formatter or too noisy
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{Credo.Check.Readability.OnePipePerLine, []},
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{Credo.Check.Readability.NestedFunctionCalls, []},
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{Credo.Check.Consistency.MultiAliasImportRequireUse, []}
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]
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}
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}
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]
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}

‎.dialyzer_ignore.exs‎

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{"lib/ecto/adapters/libsql.ex", "Function rollback/2 has no local return."}
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{"lib/ecto/adapters/libsql.ex", "The pattern can never match the type
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{:error, %EctoLibSql.Error{:__exception__ => true, :message => _, :sqlite => nil},
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%EctoLibSql.State{:conn_id => _, _ => _}}
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| {:ok, %EctoLibSql.Query{:statement => _, _ => _},
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%EctoLibSql.Result{
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:columns => _,
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:command =>
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:begin
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| :commit
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| :create
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| :delete
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| :insert
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| :rollback
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| :select
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| :unknown
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| :update,
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:num_rows => _,
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:rows => _
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}, %EctoLibSql.State{:conn_id => _, _ => _}}
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."}
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{"lib/ecto/adapters/libsql.ex", "Type mismatch for @callback dump_cmd."}
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{"lib/ecto/adapters/libsql/connection.ex", "Spec type mismatch in argument to callback to_constraints."}
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{"lib/ecto/adapters/libsql/connection.ex", "Type mismatch with behaviour callback to explain_query/4."}
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{"lib/ecto/adapters/libsql/connection.ex", "List construction (cons) will produce an improper list, because its second argument is <<_::64>>."}
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# Dialyzer warnings that are expected/acceptable for this project.
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# These are typically due to Ecto behaviour callback mismatches or
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# patterns that Dialyzer cannot fully analyse.
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#
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# Format: List of strings or regex patterns to match warning messages.
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[
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# Ecto adapter callback type mismatches
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~r/Function rollback\/2 has no local return/,
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~r/Type mismatch for @callback dump_cmd/,
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~r/Spec type mismatch in argument to callback to_constraints/,
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~r/Type mismatch with behaviour callback to explain_query/,
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# IO list construction - this is intentional for performance
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~r/List construction.*will produce an improper list.*second argument is/,
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# Pattern matching issues that arise from complex type unions
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~r/The pattern can never match the type/
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]

‎.github/workflows/ci.yml‎

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- name: Run Rust tests
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run: cargo test --manifest-path native/ecto_libsql/Cargo.toml --all-features
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- name: Install cargo-deny if not present
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run: |
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if ! command -v cargo-deny &> /dev/null; then
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echo "cargo-deny not found, installing..."
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cargo install cargo-deny --locked
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else
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echo "cargo-deny already installed: $(cargo-deny --version)"
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fi
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- name: Check licences and security advisories
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working-directory: native/ecto_libsql
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run: cargo deny check licenses advisories
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- name: Compile (warnings as errors)
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run: mix compile --force --warnings-as-errors
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- name: Run Credo code quality checks
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run: mix credo
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- name: Run Sobelow security audit
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run: mix sobelow --config
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- name: Debug .so files
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run: find . -name '*.so' -print
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‎CHANGELOG.md‎

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- Updated documentation in README.md with examples for all encryption scenarios
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- See [Turso Encryption Documentation](https://docs.turso.tech/cloud/encryption) for key generation and requirements
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- **Comprehensive Elixir Code Quality Tooling**
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- Added **Credo** for static code analysis with strict configuration (`.credo.exs`)
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- Added **Dialyxir** for type checking with proper ignore patterns (`.dialyzer_ignore.exs`)
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- Added **Sobelow** security scanner for vulnerability detection
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- All three tools integrated into GitHub CI pipeline for automated quality checks
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- **Property-Based Fuzz Testing (Elixir)**
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- New `test/fuzz_test.exs` with comprehensive property-based tests using StreamData
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- **SQL injection prevention tests** - Verifies parameters are safely escaped
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- **Transaction behaviour fuzzing** - Tests `:deferred`, `:immediate`, `:exclusive` modes
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- **Prepared statement fuzzing** - Tests various parameter types (integers, strings, floats)
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- **Edge case numeric tests** - Tests 64-bit integer bounds and special float values
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- **Binary/BLOB data handling** - Tests arbitrary binary data and round-trip integrity
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- **Savepoint name validation** - Tests SQL injection prevention in nested transactions
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- **Connection ID handling** - Tests graceful handling of invalid connection IDs
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- **Ecto SQL Adapter Compatibility Tests**
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- `test/ecto_sql_compatibility_test.exs` - Core SQL compatibility tests
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- `test/ecto_sql_transaction_compat_test.exs` - Transaction compatibility tests
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- `test/ecto_stream_compat_test.exs` - Streaming compatibility tests
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- Ported key tests from Ecto.Adapters.SQL test suite to verify compatibility
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- **Rust Fuzz Testing Infrastructure**
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- Added `cargo-fuzz` based fuzzing in `native/ecto_libsql/fuzz/`
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- Fuzz targets: `fuzz_detect_query_type`, `fuzz_should_use_query`, `fuzz_sql_structured`
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- CI integration runs each fuzz target for 30 seconds per build
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- Documentation in `native/ecto_libsql/FUZZING.md`
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- **Rust Property-Based Testing**
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- Added `proptest` crate for property-based testing
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- New `tests/proptest_tests.rs` with structured SQL generation tests
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- Tests query type detection with generated SQL patterns
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- **License and Security Advisory Checking**
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- Added `cargo-deny` configuration (`deny.toml`) for dependency auditing
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- Checks for license compliance, security advisories, duplicate dependencies
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- Integrated into CI pipeline
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- **SQLite Hook Investigation (Documented as Unsupported)**
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- Researched SQLite update hooks and authorizer hooks for CDC and RLS
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- Added `src/hooks.rs` with explicit `:unsupported` returns
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- Documented Rustler threading limitations preventing implementation
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- Added `test/hooks_test.exs` verifying unsupported behaviour
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- Comprehensive documentation of alternative approaches in CHANGELOG
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### Changed
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- **Elixir Code Quality Improvements**
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- **Eliminated duplicate code** in `batch/2` and `batch_transactional/2` functions
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- Extracted common `parse_batch_results/1` helper function
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- **Improved unused variable naming consistency** across all test files
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- Changed `{:ok, _, _, state}` patterns to `{:ok, _query, _result, state}`
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- Changed `{:error, _}` patterns to `{:error, _reason}`
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- **Added typespecs** to key public functions:
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- `sync/1`, `begin/2`, `commit/1`, `rollback/1` in `EctoLibSql.Native`
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- `batch/2`, `batch_transactional/2` in `EctoLibSql.Native`
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- `query/2`, `enable_foreign_keys/1` in `EctoLibSql.Pragma`
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- **Fixed Dialyzer ignore file format** - Changed from tuples to regex list
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- **Rust Code Modernisation**
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- Replaced `lazy_static!` with `std::sync::LazyLock` (Rust 1.80+ feature)
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- Added stricter Clippy lints: `clippy::unwrap_used`, `clippy::expect_used`
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- Fixed all Clippy warnings across the codebase
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- Improved error handling patterns throughout
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- **CI Pipeline Enhancements**
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- Added Credo and Sobelow checks to `elixir-tests-latest` job
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- Added Rust fuzz testing job with 30-second per-target runs
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- Added `cargo-deny` license and advisory checking
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- Improved caching for faster builds
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### Fixed
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- **Security: SQL Injection Prevention in Pragma Module**
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- Added `valid_identifier?/1` function to sanitise table names in `table_info/2`
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- Prevents potential SQL injection via malicious table names
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- Returns `{:error, {:invalid_identifier, name}}` for invalid identifiers
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- **Dialyzer Type Errors**
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- Fixed `disconnect/2` spec type mismatch with DBConnection behaviour
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- Changed first argument type from `Keyword.t()` to `term()`
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- **Fuzz Test Stability**
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- Fixed savepoint fuzz tests to handle transaction conflicts gracefully
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- Fixed handling of non-UTF8 binary data in NIF calls
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- Added proper try/rescue blocks for ArgumentError in fuzz tests
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### Clarifications
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- **ALTER TABLE ALTER COLUMN Support (Already Implemented)**

‎lib/ecto/adapters/libsql.ex‎

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File.mkdir_p!(Path.dirname(path))
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case System.cmd("sqlite3", [database, ".schema"]) do
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# Clear environment to avoid leaking sensitive variables to subprocess.
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case System.cmd("sqlite3", [database, ".schema"], env: []) do
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{output, 0} ->
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File.write!(path, output)
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{:ok, path}

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