bbenne10/tesseract-rs-test

Tesseract-rs Flake test

Grabs tesseract5 and leptonica from nixpkgs and sets up a crate that build against them.

With nix available, clone the repo, cd inside and run nix develop .

Once inside the devShell, your general rust packages are available (via nix pkgs - no need for rustup).

You can compile with:

$ nix build .#tess_test

which will put results in the symlink at ./result

Builds done this way will cache and reuse dependencies by caching them in the nix store and providing them as an input if the array of deps in Cargo.toml has not changed.

You may also build with:

$ cargo build

which does the normal rust thing of putting it in /target/... and caching as all other "normal" rust development toolchains do (since you're using one :) ).

tesseract-rs-test's Issues

Unable to find libclang

Hello! I hope you are having a wonderful evening. There's a very good chance this is user error, but maybe not?

The usual info:
I was trying to follow the README steps and expected the build to result in the skeleton crate building as well as its tesseract 5 dependencies intact, but the error below appears.

ecashin@dell-Latitude-E6420:~/git/tesseract-rs-test$ nix develop .
ecashin@dell-Latitude-E6420:~/git/tesseract-rs-test$ nix build .#tess_test
error: builder for '/nix/store/x2riah09n8wnnlrkr10dsysprc3c8s1i-tesseract-rs-test-deps-0.1.0.drv' failed with exit code 101;
       last 10 log lines:
       >   cargo:rerun-if-env-changed=PKG_CONFIG_SYSROOT_DIR_x86_64-unknown-linux-gnu
       >   cargo:rerun-if-env-changed=PKG_CONFIG_SYSROOT_DIR_x86_64_unknown_linux_gnu
       >   cargo:rerun-if-env-changed=HOST_PKG_CONFIG_SYSROOT_DIR
       >   cargo:rerun-if-env-changed=PKG_CONFIG_SYSROOT_DIR
       >   cargo:rustc-link-search=native="/nix/store/61kvsd3aa7qmhnkgl69w5kqvj8b25bpn-leptonica-1.82.0/lib"
       >   cargo:rustc-link-lib=lept
       >
       >   --- stderr
       >   thread 'main' panicked at 'Unable to find libclang: "couldn't find any valid shared libraries matching: ['libclang.so', 'libclang-*.so', 'libclang.so.*', 'libclang-*.so.*'], set the `LIBCLANG_PATH` environment variable to a path where one of these files can be found (invalid: [])"', /nix/store/qv8hnmlqzvch6ljg57l8wk2ycvsjcwq4-vendor-cargo-deps/c19b7c6f923b580ac259164a89f2577984ad5ab09ee9d583b888f934adbbe8d0/bindgen-0.60.1/src/lib.rs:2172:31
       >   note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
       For full logs, run 'nix log /nix/store/x2riah09n8wnnlrkr10dsysprc3c8s1i-tesseract-rs-test-deps-0.1.0.drv'.
error: 1 dependencies of derivation '/nix/store/92kn0m2vgpdsil7pz9biardqfyr7hap4-tess_test-0.1.0.drv' failed to build
ecashin@dell-Latitude-E6420:~/git/tesseract-rs-test$