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alois31 81a0624d76
libexpr/print: pretty-print idempotently
When pretty-printing is enabled, previously an unforced thunk would trigger
indentation, even when it subsequently does not evaluate to a nested structure.
The resulting output looked inconsistent, and furthermore pretty-printing was
not idempotent (since pretty-printing the same value again, which is now fully
evaluated, will not trigger indentation).
When strict evaluation is enabled, force the item before inspecting its type,
so that it is properly known whether it contains a nested structure.
Furthermore, there is no need to cause indentation for unforced thunks, since
the very next operation will be printing them as `«thunk»`.

This is mostly a port of https://github.com/NixOS/nix/pull/11100 , but we only
force the item when it's going to be forced anyway due to strict
pretty-printing, and a new test was written since the REPL testing framework in
Lix is different.

Co-Authored-By: Robert Hensing <robert@roberthensing.nl>
Change-Id: Ib7560fe531d09e05ca6b2037a523fe21a26d9d58
2024-07-18 18:41:28 +02:00
.github .github: clean up stale things and wrong references 2024-06-12 15:34:23 -07:00
bench Add benchmarking scripts 2024-04-08 19:50:24 -07:00
clang-tidy clang-tidy: work with angle brackets and external projects 2024-05-24 02:22:58 +00:00
contrib function-trace: always show the trace 2019-09-18 23:23:21 +02:00
doc Merge "doc/manual: clarify documentation related to the $$ parser bug" into main 2024-07-18 15:01:20 +00:00
lix-doc lix-doc: update dependencies and refactor 2024-07-10 02:25:48 +00:00
maintainers Merge changes I476a2516,I8a274227 into main 2024-06-26 17:34:45 +00:00
meson libexpr: rewrite the parser with pegtl instead of flex/bison 2024-06-25 12:24:58 +00:00
misc libexpr: rewrite the parser with pegtl instead of flex/bison 2024-06-25 12:24:58 +00:00
nix-support nix-support/binary-tarball.nix: Pass through root paths 2024-07-13 23:22:43 +00:00
perl libutil: allow draining Generator<Bytes> into sinks 2024-07-03 11:46:53 +00:00
releng doc/release-notes: link the upcoming release notes again 2024-07-17 22:12:41 +00:00
scripts remove the autoconf+Make buildsystem 2024-05-07 17:04:30 -06:00
src libexpr/print: pretty-print idempotently 2024-07-18 18:41:28 +02:00
subprojects/aws_sdk build: fix static aws-cpp-sdk 2024-05-30 00:40:25 -06:00
tests libexpr/print: pretty-print idempotently 2024-07-18 18:41:28 +02:00
.clang-format Add pre-commit checks 2024-03-29 22:57:40 -07:00
.clang-tidy Add basic clang-tidy config 2024-03-29 20:26:38 -07:00
.dir-locals.el .dir-locals.el: Set c-block-comment-prefix 2020-07-10 11:21:06 +02:00
.editorconfig add editorconfig for markdown 2024-05-24 02:22:44 +00:00
.envrc .envrc: remove MAKEFLAGS and use clang environment by default 2024-06-25 12:36:18 -06:00
.gitignore Put into place initial release engineering 2024-06-06 20:53:08 -07:00
.this-is-lix devShell: guard against running from another directory 2024-06-24 13:41:38 -07:00
CONTRIBUTING.md chore: re-work the contribution guide 2024-05-07 01:28:35 +00:00
COPYING Add pre-commit checks 2024-03-29 22:57:40 -07:00
default.nix Format Nix code with nixfmt 2024-04-08 13:00:00 -07:00
docker.nix releng: support multiarch docker images 2024-06-09 20:33:24 -07:00
flake.lock [resubmit] flake: update nixpkgs pin 23.11->24.05 (+ boehmgc compat changes) 2024-06-12 15:34:22 -07:00
flake.nix use clangStdenv for the default devShell, so we get clangd by default 2024-07-12 20:52:33 +00:00
justfile justfile: accept extra options to just setup and pass them to meson 2024-06-24 13:37:01 -07:00
meson.build remove boost coroutine references 2024-07-16 01:50:16 +00:00
meson.options build: expose option to enable or disable precompiled std headers 2024-06-06 12:46:26 -06:00
package.nix remove sourceToSink, sinkToSource, and boehm patch 2024-07-16 01:50:16 +00:00
README.md chore: rebrand Nix to Lix when it makes sense 2024-06-01 20:31:24 +02:00
shell.nix shell.nix: conform to documentation 2024-05-27 16:47:40 +02:00
treefmt.toml Format Nix code with nixfmt 2024-04-08 13:00:00 -07:00
version.json version: update to 2.91-dev for main 2024-06-15 18:46:18 -07:00

Lix

Lix is an implementation of Nix, a powerful package management system for Linux and other Unix systems that makes package management reliable and reproducible.

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