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readme: add short REPL section

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Richard Marko 2020-07-03 17:00:03 +02:00
parent f964284c66
commit 0cf6be6be2
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README.md
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@ -32,6 +32,23 @@ $ env NIXPKGS_TESTS=yes PRETTY_TESTS=1 cabal v2-test
$ ./dist/build/hnix/hnix --help
```
## Using the REPL
To enter the `hnix` REPL use
```
hnix --repl
```
To evaluate an expression and make it available in the REPL
as the `input` variable use
```
hnix --eval -E '(import <nixpkgs> {}).pkgs.hello' --repl
```
Use the `:help` command for a list of all available REPL commands.
## Building with full debug info
To build `hnix` for debugging, and with full tracing output and stack traces,