translate-c unhappy when building outside source directory

[jburgy]

Zig Version

0.14.0

Steps to Reproduce and Observed Behavior

$ git clone https://gist.github.com/jburgy/081992ed24df120cd2edde6e56346371
$ cd 081992ed24df120cd2edde6e56346371/
$ zig build
$ PYTHONPATH=zig-out/lib /opt/python/3.13.0/bin/python3 -c "import libext"
$ echo $?
0

Everything works as expected in the happy path above. However, if you do

$ mkdir ../scratch
$ cd ../scratch
$ zig build --build-file ../081992ed24df120cd2edde6e56346371/build.zig

you'll get error: failed to check cache: '../081992ed24df120cd2edde6e56346371/.zig-cache/o/4e4e86279020dbd67ed90b5b94e6e6ba/py.zig' file_hash FileNotFound. Not only does py.zig not exist, its parent (4e4e86279020dbd67ed90b5b94e6e6ba/) does not exist either

Expected Behavior

zig translate-c should write its output to a file regardless of in what folder zig build is run

[jburgy]

See https://discord.com/channels/605571803288698900/1393290799684390962 for context as to why zig build runs outside the source root

[jburgy]

Should this be blocking ziglang/zig#20630?

[Vexu]

Should this be blocking #20630?

No, your example works as expected when using https://github.com/ziglang/translate-c.

[jburgy]

No, your example works as expected when using https://github.com/ziglang/translate-c.

Not sure I follow that statement. Am I not using ziglang/translate-c when I do

scratch$ zig build --build-file ../081992ed24df120cd2edde6e56346371/build.zig --verbose
/opt/zig-linux-x86_64-0.14.0/zig translate-c -lc --listen=- -I /opt/python/3.13.0/include/python3.13 ../081992ed24df120cd2edde6e56346371/py.h 
CLICOLOR_FORCE=1 pkg-config --list-all 
/opt/zig-linux-x86_64-0.14.0/zig build-lib -lpython3.13 -ODebug -L /opt/python/3.13.0/lib --dep py -Mroot=../081992ed24df120cd2edde6e56346371/root.zig -ODebug -Mpy=../081992ed24df120cd2edde6e56346371/.zig-cache/o/4e4e86279020dbd67ed90b5b94e6e6ba/py.zig -lc --cache-dir ../081992ed24df120cd2edde6e56346371/.zig-cache --global-cache-dir /home/jburgy/.cache/zig --name ext -dynamic --zig-lib-dir /opt/zig-linux-x86_64-0.14.0/lib/ --listen=- 
install
└─ install ext
   └─ zig build-lib ext Debug native 1 errors
error: failed to check cache: '../081992ed24df120cd2edde6e56346371/.zig-cache/o/4e4e86279020dbd67ed90b5b94e6e6ba/py.zig' file_hash FileNotFound

(I should also mention that the problem goes away when I use @cImport instead of an explicit py.h and .addTranslateC in build.zig)

[Vexu]

Not sure I follow that statement. Am I not using ziglang/translate-c when I do

Not yet, that's why the issue is open.