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Add --flags=tracing, and document it in README.md
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16
README.md
16
README.md
@ -21,6 +21,21 @@ $ cabal test
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$ LANGUAGE_TESTS=yes NIXPKGS_TESTS=yes cabal test
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$ ./dist/build/hnix/hnix --help
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```
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## Building with full debug info
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To build `hnix` for debugging, and with full tracing output and stack traces,
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use:
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```
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$ nix-shell --arg doProfiling true
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$ cabal configure --enable-tests --enable-profiling --flags=tracing
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$ cabal build
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$ ./dist/build/hnix/hnix -v5 <args> +RTS -xc
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```
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Note that this will run quite slowly, but will give the most information as to
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what might potentially be going wrong during parsing or evaluation.
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## Building with benchmarks enabled
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To build `hnix` with benchmarks enabled:
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@ -32,7 +47,6 @@ $ cabal build
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$ cabal bench
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```
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## Building with profiling enabled
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To build `hnix` with profiling enabled:
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15
hnix.cabal
15
hnix.cabal
@ -2,7 +2,7 @@
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--
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-- see: https://github.com/sol/hpack
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--
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-- hash: 7880788afb8b7755b22c9bd91a3c47598fe26b9a643b2bb55816331ae179aa50
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-- hash: c030de7d44eabbd21ae044bd9108da5b34d7e3feaf8a8facbc9383c85e382186
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name: hnix
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version: 0.5.0
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@ -25,6 +25,11 @@ source-repository head
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type: git
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location: https://github.com/jwiegley/hnix
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flag tracing
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description: Enable full debug tracing
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manual: True
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default: False
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library
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exposed-modules:
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Nix
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@ -103,6 +108,8 @@ library
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, unordered-containers >=0.2.9 && <0.3
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, vector
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, xml
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if flag(tracing)
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cpp-options: -DENABLE_TRACING=1
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default-language: Haskell2010
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executable hnix
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@ -133,6 +140,8 @@ executable hnix
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, text
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, transformers
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, unordered-containers >=0.2.9 && <0.3
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if flag(tracing)
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cpp-options: -DENABLE_TRACING=1
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default-language: Haskell2010
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test-suite hnix-tests
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@ -175,6 +184,8 @@ test-suite hnix-tests
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, transformers
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, unix
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, unordered-containers >=0.2.9 && <0.3
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if flag(tracing)
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cpp-options: -DENABLE_TRACING=1
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default-language: Haskell2010
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benchmark hnix-benchmarks
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@ -205,4 +216,6 @@ benchmark hnix-benchmarks
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, text
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, transformers
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, unordered-containers >=0.2.9 && <0.3
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if flag(tracing)
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cpp-options: -DENABLE_TRACING=1
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default-language: Haskell2010
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10
package.yaml
10
package.yaml
@ -36,6 +36,16 @@ ghc-options:
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# - -fexpose-all-unfoldings
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# - -O2
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flags:
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tracing:
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description: Enable full debug tracing
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manual: True
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default: False
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when:
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- condition: flag(tracing)
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cpp-options: -DENABLE_TRACING=1
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library:
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source-dirs: src
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dependencies:
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@ -1,3 +1,4 @@
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{-# LANGUAGE CPP #-}
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{-# LANGUAGE FlexibleInstances #-}
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{-# LANGUAGE RankNTypes #-}
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{-# LANGUAGE OverloadedStrings #-}
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@ -25,7 +26,11 @@ import Nix.Parser.Library (reservedNames)
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import Nix.Parser.Operators
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import Nix.StringOperations
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import Nix.Thunk
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#if ENABLE_TRACING
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import Nix.Utils
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#else
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import Nix.Utils hiding ((<$>))
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#endif
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import Nix.Value
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import Prelude hiding ((<$>))
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import Text.PrettyPrint.ANSI.Leijen
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@ -55,7 +55,7 @@ valueRef = Value
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buildThunk :: MonadVar m => m v -> m (Thunk m v)
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buildThunk action =
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#if ENABLE_TRACING
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let !x = unsafePerformIO (atomicModifyIORef' counter (\x -> (succ x, x))) in
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let !x = unsafePerformIO (atomicModifyIORef' counter (\c -> (succ c, c))) in
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Thunk x
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#else
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Thunk
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