bundle: Ship pdfium runtime library for native PDF viewing

.cargo/config.toml

@@ -18,7 +18,11 @@ rustflags = [
 
 # We need lld to link libwebrtc.a successfully on aarch64-linux
 [target.aarch64-unknown-linux-gnu]
-rustflags = ["-C", "link-arg=-fuse-ld=lld"]
+rustflags = ["-C", "link-arg=-fuse-ld=lld", "-C", "link-arg=-Wl,-rpath,$ORIGIN/../lib"]
+
+# Lets dlopen("libpdfium.so") resolve the copy bundled in <app>/lib.
+[target.x86_64-unknown-linux-gnu]
+rustflags = ["-C", "link-arg=-Wl,-rpath,$ORIGIN/../lib"]
 
 [env]
 MACOSX_DEPLOYMENT_TARGET = "10.15.7"

script/bundle-linux

@@ -171,6 +171,28 @@ mkdir -p "${zed_dir}/lib"
 rm -rf "${zed_dir}/lib/*"
 cp $(find_libs) "${zed_dir}/lib"
 
+# PDFium is dlopen'd at runtime by the bundled pdf_viewer for native PDF viewing;
+# find_libs cannot see it because the binaries are not linked against it.
+case "$(uname -m)" in
+    x86_64) pdfium_arch="x64" ;;
+    aarch64) pdfium_arch="arm64" ;;
+    *) echo "Unsupported architecture for pdfium: $(uname -m)" >&2 && exit 1 ;;
+esac
+pdfium_tag="chromium/8066"
+case "${pdfium_arch}" in
+    x64) pdfium_sha256="0b43f405477cf2cfc4dbff06905093c3309756c6bca1fb9da99234a2ca97fed2" ;;
+    arm64) pdfium_sha256="0e6f90dccbc6b81fd5d7106abaf164c4222178f024c204d00d526b60fd2ad535" ;;
+esac
+pdfium_tgz="${target_dir}/pdfium-linux-${pdfium_arch}.tgz"
+if ! echo "${pdfium_sha256}  ${pdfium_tgz}" | sha256sum --check --status 2>/dev/null; then
+    curl -fsSLo "${pdfium_tgz}" "https://github.com/bblanchon/pdfium-binaries/releases/download/${pdfium_tag}/pdfium-linux-${pdfium_arch}.tgz"
+    echo "${pdfium_sha256}  ${pdfium_tgz}" | sha256sum --check -
+fi
+pdfium_tmp=$(mktemp -d)
+tar -xzf "${pdfium_tgz}" -C "${pdfium_tmp}" "lib/libpdfium.so"
+cp "${pdfium_tmp}/lib/libpdfium.so" "${zed_dir}/lib/libpdfium.so"
+rm -rf "${pdfium_tmp}"
+
 # Icons
 mkdir -p "${zed_dir}/share/icons/hicolor/512x512/apps"
 cp "crates/zed/resources/app-icon$suffix.png" "${zed_dir}/share/icons/hicolor/512x512/apps/zed.png"