Introduce feature sets for clients

Author: inikulin

.github/workflows/ci.yml

@@ -51,16 +51,23 @@ jobs:
         thing:
           - x86_64-linux
           - aarch64-linux
+          - arm64-android
+          - arm-android
+          - aarch64-ios
           - x86_64-macos
         include:
           - apt_packages: ""
           - custom_env: {}
           - build_only: false
+          - cargo_args: ""
+
           - thing: x86_64-linux
             target: x86_64-unknown-linux-gnu
             rust: stable
             os: ubuntu-latest
+
           - thing: aarch64-linux
+            build_only: true
             target: aarch64-unknown-linux-gnu
             rust: stable
             os: ubuntu-latest
@@ -69,11 +76,32 @@ jobs:
               CC: aarch64-linux-gnu-gcc
               CXX: aarch64-linux-gnu-g++
               CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER: aarch64-linux-gnu-g++
+
+          - thing: arm64-android
+            build_only: true
+            target: aarch64-linux-android
+            rust: stable
+            os: ubuntu-latest
+            cargo_args: --no-default-features --features server-client-common-default
+
+          - thing: arm-android
             build_only: true
+            target: armv7-linux-androideabi
+            rust: stable
+            os: ubuntu-latest
+            cargo_args: --no-default-features --features server-client-common-default
+
+          - thing: aarch64-ios
+            build_only: true
+            target: aarch64-apple-ios
+            os: macos-latest
+            cargo_args: --no-default-features --features server-client-common-default
+
           - thing: x86_64-macos
             target: x86_64-apple-darwin
             rust: stable
             os: macos-latest
+
     steps:
       - uses: actions/checkout@v2
         with:
@@ -86,13 +114,16 @@ jobs:
         run: sudo apt update && sudo apt install -y ${{ matrix.apt_packages }}
         shell: bash
       - run: rustup target add ${{ matrix.target }}
+      - name: Set Android Linker path
+        if: endsWith(matrix.thing, '-android')
+        run: echo "CARGO_TARGET_$(echo ${{ matrix.target }} | tr \\-a-z _A-Z)_LINKER=$ANDROID_NDK/toolchains/llvm/prebuilt/linux-x86_64/bin/$(echo ${{ matrix.target }} | sed s/armv7/armv7a/)21-clang++" >> "$GITHUB_ENV"
       - name: Build tests
         # We `build` because we want the linker to verify we are cross-compiling correctly for check-only targets.
-        run: cargo build --target ${{ matrix.target }}
+        run: cargo build --target ${{ matrix.target }} ${{matrix.cargo_args}}
         shell: bash
         env: ${{ matrix.custom_env }}
       - name: Run tests
         if: "!matrix.build_only"
-        run: _RJEM_MALLOC_CONF=prof:true cargo test --target ${{ matrix.target }}
+        run: _RJEM_MALLOC_CONF=prof:true cargo test --target ${{ matrix.target }} ${{matrix.cargo_args}}
         shell: bash
         env: ${{ matrix.custom_env }}

foundations/Cargo.toml

@@ -14,13 +14,7 @@ categories = [
     "external-ffi-bindings",
     "memory-management",
 ]
-keywords = [
-    "service",
-    "telemetry",
-    "settings",
-    "seccomp",
-    "metrics",
-]
+keywords = ["service", "telemetry", "settings", "seccomp", "metrics"]
 
 [package.metadata.release]
 # run in the context of workspace root
@@ -40,14 +34,17 @@ default = ["platform-common-default", "security"]
 
 # All non platform-specific features
 platform-common-default = [
-    "metrics",
     "settings",
     "jemalloc",
     "telemetry",
     "cli",
     "testing",
 ]
 
+# A subset of features that can be used both on server and client sides. Useful for libraries
+# that can be used either way.
+server-client-common-default = ["settings", "client-telemetry", "testing"]
+
 # Enables metrics functionality.
 metrics = [
     "dep:foundations-macros",
@@ -80,6 +77,9 @@ telemetry = [
     "telemetry-server",
 ]
 
+# Enables a subset of telemetry features suitable for usage in clients.
+client-telemetry = ["logging", "metrics", "tracing"]
+
 # Enables the telemetry server.
 telemetry-server = [
     "dep:futures-util",

foundations/build.rs

@@ -61,7 +61,10 @@ mod security {
         // so we can't use those gates here and must check at runtime the `TARGET` environment
         // variable. This is unfortunate as it means we need to depend on bindgen even
         // when targetting macOS. See https://github.com/rust-lang/cargo/issues/4932.
-        if target.contains("linux") && (target.contains("x86_64") || target.contains("aarch64")) {
+        if target.contains("linux")
+            && !target.contains("android")
+            && (target.contains("x86_64") || target.contains("aarch64"))
+        {
             linux_build();
         }
     }

foundations/src/lib.rs

@@ -23,9 +23,12 @@
 //! - **default**: All features are enabled by default.
 //! - **platform-common-default**: The same as **default**, but excludes platform-specific features,
 //! such as **security**.
+//! - **server-client-common-default**: A subset of features that can be used both on server and client sides.
+//!   Useful for libraries that can be used either way.
 //! - **settings**: Enables serializable documented settings functionality.
 //! - **telemetry**: Enables all the telemetry-related features (**metrics**, **logging**, **tracing**, **telemetry-server**).
 //! - **telemetry-server**: Enables the telemetry server.
+//! - **client-telemetry**: Enables a subset of telemetry features suitable for usage in clients (e.g. on mobile devices).
 //! - **metrics**: Enables metrics functionality.
 //! - **logging**: Enables logging functionality.
 //! - **tracing**: Enables distributed tracing functionality.