pagefind: support file:// URI for prefetched tarballs (#417919)

  fetchFromGitHub,

  fetchNpmDeps,

  fetchurl,

  httplz,

  binaryen,

  gzip,

  nodejs,

    # patch a build-time dependency download

    (

      realpath $cargoDepsCopy/* | grep lindera-unidic # debug for when version number changes

      cd $cargoDepsCopy/lindera-unidic-0.32.2

      #oldHash=$(sha256sum build.rs | cut -d " " -f 1)

      # serve lindera-unidic on localhost vacant port

      httplz_port="${

        if stdenv.buildPlatform.isDarwin then

          ''$(python -c 'import socket; s=socket.socket(); s.bind(("", 0)); print(s.getsockname()[1]); s.close()')''

        else

          "34567"

      }"

      mkdir .lindera-http-plz

      ln -s ${lindera-unidic-src} .lindera-http-plz/unidic-mecab-2.1.2.tar.gz

      httplz --port "$httplz_port" -- .lindera-http-plz/ &

      echo $! >$TMPDIR/.httplz_pid

      # file:// does not work

      substituteInPlace build.rs --replace-fail \

          "https://dlwqk3ibdg1xh.cloudfront.net/unidic-mecab-2.1.2.tar.gz" \

          "http://localhost:$httplz_port/unidic-mecab-2.1.2.tar.gz"

      # not needed with useFetchCargoVendor=true, but kept in case it is required again

      #newHash=$(sha256sum build.rs | cut -d " " -f 1)

      #substituteInPlace .cargo-checksum.json --replace-fail $oldHash $newHash

      patch -d $cargoDepsCopy/lindera-assets-*/ -p1 < ${./lindera-assets-support-file-paths.patch}

      substituteInPlace $cargoDepsCopy/lindera-unidic-*/build.rs --replace-fail \

          "${lindera-unidic-src.url}" \

          "file://${lindera-unidic-src}"

    )

  '';

      rustc.llvmPackages.lld

      wasm-bindgen-cli_0_2_92

      wasm-pack

      httplz

    ]

    ++ lib.optionals stdenv.buildPlatform.isDarwin [

      python3

    )

  '';

  # the file is also fetched during checkPhase

  preInstall = ''

    kill ${lib.optionalString stdenv.hostPlatform.isDarwin "-9"} $(cat $TMPDIR/.httplz_pid)

  '';

  buildFeatures = [ "extended" ];

  doInstallCheck = true;

diff --git a/src/lib.rs b/src/lib.rs

index 6f86cc4..a9ca418 100644

--- a/src/lib.rs

+++ b/src/lib.rs

@@ -128,12 +128,17 @@ pub fn fetch(params: FetchParams, builder: impl DictionaryBuilder) -> Result<(),

         // copy(&source_path, &source_path_for_build)?;

         let tmp_path = Path::new(&build_dir).join(params.file_name.to_owned() + ".download");

+        if let Some(path) = params.download_url.strip_prefix("file://") {

+            std::fs::copy(path, &tmp_path)?;

+        }

+        else {

         // Download a tarball

         let resp = ureq::get(params.download_url).call()?;

         let mut dest = File::create(&tmp_path)?;

         io::copy(&mut resp.into_reader(), &mut dest)?;

         dest.flush()?;

+        }

         rename(tmp_path, source_path_for_build).expect("Failed to rename temporary file");

@@ -153,7 +158,6 @@ pub fn fetch(params: FetchParams, builder: impl DictionaryBuilder) -> Result<(),

         archive.unpack(&tmp_extract_path)?;

         rename(tmp_extracted_path, &input_dir).expect("Failed to rename archive directory");

         let _ = std::fs::remove_dir_all(&tmp_extract_path);

-        drop(dest);

         let _ = std::fs::remove_file(source_path_for_build);

     }