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packaging: rename nixexpr -> lixexpr and so on

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This breaks downstreams linking to us on purpose to make sure that if
someone is linking to Lix they're doing it on purpose and crucially not
mixing up Nix and Lix versions in compatibility code.

We still need to fix the internal includes to follow the same schema so
we can drop the single-level include system entirely. However, this
requires a little more effort.

This adds pkg-config for libfetchers and config.h.

Migration path:
expr.hh      -> lix/libexpr/expr.hh
nix/config.h -> lix/config.h

To apply this migration automatically, remove all `<nix/>` from
includes, so: `#include <nix/expr.hh>` -> `#include <expr.hh>`. Then,
the correct paths will be resolved from the tangled mess, and the
clang-tidy automated fix will work.

Then run the following for out of tree projects:

```
lix_root=$HOME/lix
(cd $lix_root/clang-tidy && nix develop -c 'meson setup build && ninja -C build')
run-clang-tidy -checks='-*,lix-fixincludes' -load=$lix_root/clang-tidy/build/liblix-clang-tidy.so -p build/ -fix src
```

Related: https://git.lix.systems/lix-project/nix-eval-jobs/pulls/5
Fixes: https://git.lix.systems/lix-project/lix/issues/279
Change-Id: I7498e903afa6850a731ef8ce77a70da6b2b46966
This commit is contained in:
Jade Lovelace 2024-05-16 17:04:05 -07:00 committed by Qyriad
parent 774c56094f
commit c97e17144e
26 changed files with 181 additions and 77 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

31
doc/manual/rl-next/rename-lixexpr.md Normal file
View file

@ -0,0 +1,31 @@
---
synopsis: Rename all the libraries nixexpr, nixstore, etc to lixexpr, lixstore, etc
credits: jade
category: Breaking Changes
---
The Lix C++ API libraries have had the following changes:
- Includes moved from `include/nix/` to `include/lix/`
- `pkg-config` files renamed from `nix-expr` to `lix-expr` and so on.
- Libraries renamed from `libnixexpr.so` to `liblixexpr.so` and so on.
There are other changes between Nix 2.18 and Lix, since these APIs are not
stable. However, this change in particular is a deliberate compatibility break
to force downstreams linking to Lix to specifically handle Lix and avoid Lix
accidentally getting ensnared in compatibility code for newer CppNix.
Migration path:
- expr.hh -> lix/libexpr/expr.hh
- nix/config.h -> lix/config.h
To apply this migration automatically, remove all `<nix/>` from includes, so `#include <nix/expr.hh>` -> `#include <expr.hh>`.
Then, the correct paths will be resolved from the tangled mess, and the clang-tidy automated fix will work.
Then run the following for out of tree projects:
```console
lix_root=$HOME/lix
(cd $lix_root/clang-tidy && nix develop -c 'meson setup build && ninja -C build')
run-clang-tidy -checks='-*,lix-fixincludes' -load=$lix_root/clang-tidy/build/liblix-clang-tidy.so -p build/ -fix src
```

4
doc/manual/src/contributing/hacking.md
View file

@ -102,14 +102,14 @@ $ meson compile -C build nixexpr
All targets may be addressed as their output, relative to the build directory, e.g.:
```bash
$ meson compile -C build src/libexpr/libnixexpr.so
$ meson compile -C build src/libexpr/liblixexpr.so
```
But Meson does not consider intermediate files like object files targets.
To build a specific object file, use Ninja directly and specify the output file relative to the build directory:
```bash
$ ninja -C build src/libexpr/libnixexpr.so.p/nixexpr.cc.o
$ ninja -C build src/libexpr/liblixexpr.so.p/nixexpr.cc.o
```
To inspect the canonical source of truth on what the state of the buildsystem configuration is, use:

16
meson.build
View file

@ -395,7 +395,21 @@ config_h = configure_file(
output : 'config.h',
)
install_headers(config_h, subdir : 'nix')
install_headers(config_h, subdir : 'lix')
# FIXME: not using the pkg-config module because it creates way too many deps
# while meson migration is in progress, and we want to not include boost here
configure_file(
input : 'src/lix-base.pc.in',
output : 'lix-base.pc',
install_dir : libdir / 'pkgconfig',
configuration : {
'prefix' : prefix,
'libdir' : libdir,
'includedir' : includedir,
'PACKAGE_VERSION' : meson.project_version(),
},
)
add_project_arguments(
# TODO(Qyriad): Yes this is how the autoconf+Make system did it.

2
meson/cleanup-install.bash
View file

@ -47,4 +47,4 @@ fi
# Intentionally not using -f.
# If these files don't exist then our assumptions have been violated and we should fail.
rm -v "$includedir/nix/parser-tab.cc" "$includedir/nix/lexer-tab.cc"
rm -v "$includedir/lix/libexpr/parser-tab.cc" "$includedir/lix/libexpr/lexer-tab.cc"

4
package.nix
View file

@ -49,7 +49,7 @@
# internal fork of nix-doc providing :doc in the repl
lix-doc ? __forDefaults.lix-doc,
pname ? "nix",
pname ? "lix",
versionSuffix ? "",
officialRelease ? false,
# Set to true to build the release notes for the next release.
@ -333,7 +333,7 @@ stdenv.mkDerivation (finalAttrs: {
echo "file binary-dist $out/bin/nix" >> $out/nix-support/hydra-build-products
''
+ lib.optionalString stdenv.isDarwin ''
for lib in libnixutil.dylib libnixexpr.dylib; do
for lib in liblixutil.dylib liblixexpr.dylib; do
install_name_tool \
-change "${lib.getLib boost}/lib/libboost_context.dylib" \
"$out/lib/libboost_context.dylib" \

2
perl/lib/Nix/meson.build
View file

@ -27,7 +27,7 @@ perl_libstore = shared_module(
],
link_args : [
# Nix doesn't provide a pkg-config file for libutil.
'-lnixutil',
'-llixutil',
soname_args,
],
install : true,

2
perl/meson.build
View file

@ -64,6 +64,6 @@ if cxx.get_linker_id() in ['ld.bfd', 'ld.gold']
add_project_link_arguments('-Wl,--no-copy-dt-needed-entries', language : 'cpp')
endif
libstore = dependency('nixstore', 'nix-store', required : true)
libstore = dependency('lixstore', 'lix-store', required : true)
subdir('lib/Nix')

10
src/libcmd/lix-cmd.pc.in Normal file
View file

@ -0,0 +1,10 @@
prefix=@prefix@
libdir=@libdir@
includedir=@includedir@
Name: Lix (libcmd)
Description: Lix Package Manager (libcmd)
Version: @PACKAGE_VERSION@
Requires: lix-base lix-util
Libs: -L${libdir} -llixcmd
Cflags: -I${includedir}/lix/libcmd

10
src/libcmd/meson.build
View file

@ -39,7 +39,7 @@ libcmd_generated_headers = [
]
libcmd = library(
'nixcmd',
'lixcmd',
libcmd_generated_headers,
libcmd_sources,
dependencies : [
@ -59,13 +59,13 @@ libcmd = library(
install_rpath : libdir,
)
install_headers(libcmd_headers, subdir : 'nix', preserve_path : true)
install_headers(libcmd_headers, subdir : 'lix/libcmd', preserve_path : true)
custom_target(
command : [ 'cp', '@INPUT@', '@OUTPUT@' ],
input : libcmd_generated_headers,
output : '@PLAINNAME@',
install : true,
install_dir : includedir / 'nix',
install_dir : includedir / 'lix/libcmd',
)
liblixcmd = declare_dependency(
@ -76,8 +76,8 @@ liblixcmd = declare_dependency(
# FIXME: not using the pkg-config module because it creates way too many deps
# while meson migration is in progress, and we want to not include boost here
configure_file(
input : 'nix-cmd.pc.in',
output : 'nix-cmd.pc',
input : 'lix-cmd.pc.in',
output : 'lix-cmd.pc',
install_dir : libdir / 'pkgconfig',
configuration : {
'prefix' : prefix,

9
src/libcmd/nix-cmd.pc.in
View file

@ -1,9 +0,0 @@
prefix=@prefix@
libdir=@libdir@
includedir=@includedir@
Name: Nix
Description: Nix Package Manager
Version: @PACKAGE_VERSION@
Libs: -L${libdir} -lnixcmd
Cflags: -I${includedir}/nix -std=c++2a

2
src/libexpr/flake/meson.build
View file

@ -4,5 +4,5 @@ libexpr_generated_headers += custom_target(
output : '@PLAINNAME@.gen.hh',
capture : true,
install : true,
install_dir : includedir / 'nix/flake',
install_dir : includedir / 'lix/libexpr/flake',
)

10
src/libexpr/lix-expr.pc.in Normal file
View file

@ -0,0 +1,10 @@
prefix=@prefix@
libdir=@libdir@
includedir=@includedir@
Name: Lix libexpr
Description: Lix Package Manager (libexpr)
Version: @PACKAGE_VERSION@
Requires: lix-base lix-util lix-fetchers lix-store bdw-gc
Libs: -L${libdir} -llixexpr
Cflags: -I${includedir}/lix/libexpr

14
src/libexpr/meson.build
View file

@ -15,7 +15,7 @@ parser_tab = custom_target(
# NOTE(Qyriad): Meson doesn't support installing only part of a custom target, so we add
# an install script below which removes parser-tab.cc.
install : true,
install_dir : includedir / 'nix',
install_dir : includedir / 'lix/libexpr',
)
lexer_tab = custom_target(
@ -37,7 +37,7 @@ lexer_tab = custom_target(
# NOTE(Qyriad): Meson doesn't support installing only part of a custom target, so we add
# an install script below which removes lexer-tab.cc.
install : true,
install_dir : includedir / 'nix',
install_dir : includedir / 'lix/libexpr',
)
# TODO(Qyriad): When the parser and lexer are rewritten this should be removed.
@ -59,7 +59,7 @@ foreach header : [ 'imported-drv-to-derivation.nix', 'fetchurl.nix' ]
output : '@PLAINNAME@.gen.hh',
capture : true,
install : true,
install_dir : includedir / 'nix',
install_dir : includedir / 'lix/libexpr',
)
endforeach
subdir('flake')
@ -127,7 +127,7 @@ libexpr_headers = files(
)
libexpr = library(
'nixexpr',
'lixexpr',
libexpr_sources,
parser_tab,
lexer_tab,
@ -152,7 +152,7 @@ libexpr = library(
install_headers(
libexpr_headers,
subdir : 'nix',
subdir : 'lix/libexpr',
preserve_path : true,
)
@ -164,8 +164,8 @@ liblixexpr = declare_dependency(
# FIXME: not using the pkg-config module because it creates way too many deps
# while meson migration is in progress, and we want to not include boost here
configure_file(
input : 'nix-expr.pc.in',
output : 'nix-expr.pc',
input : 'lix-expr.pc.in',
output : 'lix-expr.pc',
install_dir : libdir / 'pkgconfig',
configuration : {
'prefix' : prefix,

10
src/libexpr/nix-expr.pc.in
View file

@ -1,10 +0,0 @@
prefix=@prefix@
libdir=@libdir@
includedir=@includedir@
Name: Nix
Description: Nix Package Manager
Version: @PACKAGE_VERSION@
Requires: nix-store bdw-gc
Libs: -L${libdir} -lnixexpr
Cflags: -I${includedir}/nix -std=c++2a

10
src/libfetchers/lix-fetchers.pc.in Normal file
View file

@ -0,0 +1,10 @@
prefix=@prefix@
libdir=@libdir@
includedir=@includedir@
Name: Lix libfetchers
Description: Lix Package Manager (libfetchers)
Version: @PACKAGE_VERSION@
Requires: lix-base lix-util
Libs: -L${libdir} -llixfetchers
Cflags: -I${includedir}/lix/libfetchers

18
src/libfetchers/meson.build
View file

@ -23,7 +23,7 @@ libfetchers_headers = files(
)
libfetchers = library(
'nixfetchers',
'lixfetchers',
libfetchers_sources,
dependencies : [
liblixstore,
@ -35,7 +35,21 @@ libfetchers = library(
install_rpath : libdir,
)
install_headers(libfetchers_headers, subdir : 'nix', preserve_path : true)
install_headers(libfetchers_headers, subdir : 'lix/libfetchers', preserve_path : true)
# FIXME: not using the pkg-config module because it creates way too many deps
# while meson migration is in progress, and we want to not include boost here
configure_file(
input : 'lix-fetchers.pc.in',
output : 'lix-fetchers.pc',
install_dir : libdir / 'pkgconfig',
configuration : {
'prefix' : prefix,
'libdir' : libdir,
'includedir' : includedir,
'PACKAGE_VERSION' : meson.project_version(),
},
)
liblixfetchers = declare_dependency(
include_directories : include_directories('.'),

10
src/libmain/lix-main.pc.in Normal file
View file

@ -0,0 +1,10 @@
prefix=@prefix@
libdir=@libdir@
includedir=@includedir@
Name: Lix libmain
Description: Lix Package Manager (libmain)
Version: @PACKAGE_VERSION@
Requires: lix-base lix-util
Libs: -L${libdir} -llixmain
Cflags: -I${includedir}/lix/libmain

8
src/libmain/meson.build
View file

@ -14,7 +14,7 @@ libmain_headers = files(
)
libmain = library(
'nixmain',
'lixmain',
libmain_sources,
dependencies : [
liblixutil,
@ -25,7 +25,7 @@ libmain = library(
install_rpath : libdir,
)
install_headers(libmain_headers, subdir : 'nix', preserve_path : true)
install_headers(libmain_headers, subdir : 'lix/libmain', preserve_path : true)
liblixmain = declare_dependency(
include_directories : include_directories('.'),
@ -35,8 +35,8 @@ liblixmain = declare_dependency(
# FIXME: not using the pkg-config module because it creates way too many deps
# while meson migration is in progress, and we want to not include boost here
configure_file(
input : 'nix-main.pc.in',
output : 'nix-main.pc',
input : 'lix-main.pc.in',
output : 'lix-main.pc',
install_dir : libdir / 'pkgconfig',
configuration : {
'prefix' : prefix,

9
src/libmain/nix-main.pc.in
View file

@ -1,9 +0,0 @@
prefix=@prefix@
libdir=@libdir@
includedir=@includedir@
Name: Nix
Description: Nix Package Manager
Version: @PACKAGE_VERSION@
Libs: -L${libdir} -lnixmain
Cflags: -I${includedir}/nix -std=c++2a

10
src/libstore/lix-store.pc.in Normal file
View file

@ -0,0 +1,10 @@
prefix=@prefix@
libdir=@libdir@
includedir=@includedir@
Name: Lix libstore
Description: Lix Package Manager (libstore)
Version: @PACKAGE_VERSION@
Requires: lix-base lix-util
Libs: -L${libdir} -llixstore -llixutil
Cflags: -I${includedir}/lix/libstore

10
src/libstore/meson.build
View file

@ -6,7 +6,7 @@ foreach header : [ 'schema.sql', 'ca-specific-schema.sql' ]
output : '@PLAINNAME@.gen.hh',
capture : true,
install : true,
install_dir : includedir / 'nix',
install_dir : includedir / 'lix/libstore',
)
endforeach
@ -201,7 +201,7 @@ foreach name, value : cpp_str_defines
endforeach
libstore = library(
'nixstore',
'lixstore',
libstore_generated_headers,
libstore_sources,
dependencies : [
@ -224,7 +224,7 @@ libstore = library(
install_rpath : libdir,
)
install_headers(libstore_headers, subdir : 'nix', preserve_path : true)
install_headers(libstore_headers, subdir : 'lix/libstore', preserve_path : true)
# Used by libfetchers.
liblixstore = declare_dependency(
@ -235,8 +235,8 @@ liblixstore = declare_dependency(
# FIXME: not using the pkg-config module because it creates way too many deps
# while meson migration is in progress, and we want to not include boost here
configure_file(
input : 'nix-store.pc.in',
output : 'nix-store.pc',
input : 'lix-store.pc.in',
output : 'lix-store.pc',
install_dir : libdir / 'pkgconfig',
configuration : {
'prefix' : prefix,

9
src/libstore/nix-store.pc.in
View file

@ -1,9 +0,0 @@
prefix=@prefix@
libdir=@libdir@
includedir=@includedir@
Name: Nix
Description: Nix Package Manager
Version: @PACKAGE_VERSION@
Libs: -L${libdir} -lnixstore -lnixutil
Cflags: -I${includedir}/nix -std=c++2a

10
src/libutil/lix-util.pc.in Normal file
View file

@ -0,0 +1,10 @@
prefix=@prefix@
libdir=@libdir@
includedir=@includedir@
Name: Lix libutil
Description: Lix Package Manager (libutil)
Version: @PACKAGE_VERSION@
Requires: lix-base lix-util
Libs: -L${libdir} -llixutil
Cflags: -I${includedir}/lix/libutil

18
src/libutil/meson.build
View file

@ -100,7 +100,7 @@ libutil_headers = files(
)
libutil = library(
'nixutil',
'lixutil',
libutil_sources,
dependencies : [
aws_sdk,
@ -118,7 +118,21 @@ libutil = library(
install : true,
)
install_headers(libutil_headers, subdir : 'nix', preserve_path : true)
install_headers(libutil_headers, subdir : 'lix/libutil', preserve_path : true)
# FIXME: not using the pkg-config module because it creates way too many deps
# while meson migration is in progress, and we want to not include boost here
configure_file(
input : 'lix-util.pc.in',
output : 'lix-util.pc',
install_dir : libdir / 'pkgconfig',
configuration : {
'prefix' : prefix,
'libdir' : libdir,
'includedir' : includedir,
'PACKAGE_VERSION' : meson.project_version(),
},
)
# Used by libstore and libfetchers.
liblixutil = declare_dependency(

8
src/lix-base.pc.in Normal file
View file

@ -0,0 +1,8 @@
prefix=@prefix@
libdir=@libdir@
includedir=@includedir@
Name: Lix base
Description: Lix Package Manager (config.hh fixup)
Version: @PACKAGE_VERSION@
Cflags: -I${includedir}/lix

12
tests/unit/meson.build
View file

@ -17,7 +17,7 @@ libutil_test_support_sources = files(
'libutil-support/tests/terminal-code-eater.cc',
)
libutil_test_support = library(
'nixutil-test-support',
'lixutil-test-support',
libutil_test_support_sources,
dependencies : [
liblixutil,
@ -57,7 +57,7 @@ libutil_tests_sources = files(
)
libutil_tester = executable(
'libnixutil-tests',
'liblixutil-tests',
libutil_tests_sources,
dependencies : [
rapidcheck,
@ -90,7 +90,7 @@ libstore_test_support_sources = files(
)
libstore_test_support = library(
'nixstore-test-support',
'lixstore-test-support',
libstore_test_support_sources,
dependencies : [
liblixutil_test_support,
@ -124,7 +124,7 @@ libstore_tests_sources = files(
)
libstore_tester = executable(
'libnixstore-tests',
'liblixstore-tests',
libstore_tests_sources,
dependencies : [
liblixstore_test_support,
@ -154,7 +154,7 @@ libexpr_test_support_sources = files(
)
libexpr_test_support = library(
'nixexpr-test-support',
'lixexpr-test-support',
libexpr_test_support_sources,
dependencies : [
liblixstore_test_support,
@ -185,7 +185,7 @@ libexpr_tests_sources = files(
)
libexpr_tester = executable(
'libnixexpr-tests',
'liblixexpr-tests',
libexpr_tests_sources,
dependencies : [
liblixexpr_test_support,