feat(acap-build): Allow building apps without the ACAP Native SDK

.github/workflows/CI.yml

@@ -18,6 +18,6 @@ jobs:
       - name: Update generated files
         run: devcontainer exec --workspace-folder . make --always-make check_generated_files check_generated_files_container
       - name: Update generated without acap-build
-        run: devcontainer exec --remote-env ACAP_SDK_LOCATION=/opt/axis/ --workspace-folder . make check_generated_files_container
+        run: devcontainer exec --remote-env ACAP_BUILD_IMPL=equivalent --workspace-folder . make check_generated_files_container
       - name: Run other checks
         run: devcontainer exec --workspace-folder . make check_other

.github/workflows/on-host-workflow.yml

@@ -49,7 +49,34 @@ jobs:
       - name: Shell setup
         # This step typically needs to be done once per shell session.
         # To verify that the procedure has worked, some checks are run as well.
+        # TODO: Simplify shell session setup; exporting two variables seems excessive
         run: |
           export ACAP_SDK_LOCATION=$HOME/axis/
           source ./init_env.sh
+          export ACAP_BUILD_IMPL=equivalent
           make check_generated_files
+  debian_and_ubuntu_no_sdk:
+    runs-on: ubuntu-22.04
+    # If the sysroots from the ACAP Native SDK are not needed, then the Rust implementation of
+    # `acap-build` can be used for an easier setup:
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Install system packages
+        run: |
+          sudo apt-get update
+          sudo apt-get install g++-aarch64-linux-gnu g++-arm-linux-gnueabihf
+      - name: Install Rust toolchain
+        run: rustup show
+      - name: Install Cargo package
+        run: |
+          cargo install --locked [email protected]
+          cargo install --locked --path crates/cargo-acap-build
+      - name: Build the app
+        run: |
+          make apps/hello_world/LICENSE
+          cargo-acap-build -- --package hello_world
+        env:
+          ACAP_BUILD_IMPL: equivalent
+          CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER: aarch64-linux-gnu-gcc
+          CARGO_TARGET_THUMBV7NEON_UNKNOWN_LINUX_GNUEABIHF_LINKER: arm-linux-gnueabihf-gcc

Cargo.toml

@@ -32,6 +32,7 @@ serde = "1.0.204"
 serde_json = "1.0.120"
 syslog = "6.1.1"
 tar = "0.4.40"
+tempdir = "0.3.7"
 tempfile = "3.10.1"
 thiserror = "1.0.61"
 tokio = "1.38.1"

apps-aarch64.checksum

@@ -1,3 +1,4 @@
+e33b272e596e7ff1a8c45837ed60946f5498890c  target-aarch64/acap/Challenge_Build_Tools_1_0_0_all.eap
 12a30609c7fa463e1e8d0405665d2aa17d4349c4  target-aarch64/acap/axstorage_example_0_0_0_aarch64.eap
 6db963922ca2ceb25715bbdb6445b504c307d432  target-aarch64/acap/bounding_box_example_0_0_0_aarch64.eap
 f99e344e5bf6fc4cd59715b9a4b784a83df27342  target-aarch64/acap/consume_analytics_metadata_0_0_0_aarch64.eap

apps-aarch64.filesize

@@ -1,3 +1,4 @@
+859	target-aarch64/acap/Challenge_Build_Tools_1_0_0_all.eap
 3698	target-aarch64/acap/axstorage_example_0_0_0_aarch64.eap
 2213	target-aarch64/acap/bounding_box_example_0_0_0_aarch64.eap
 2083	target-aarch64/acap/consume_analytics_metadata_0_0_0_aarch64.eap

apps/challenge_build_tools/Cargo.toml

@@ -0,0 +1,5 @@
+[package]
+name = "challenge_build_tools"
+version = "1.0.0-alpha+2024"
+edition.workspace = true
+publish = false

apps/challenge_build_tools/manifest.json

@@ -0,0 +1,50 @@
+{
+  "schemaVersion": "1.7.0",
+  "acapPackageConf": {
+    "setup": {
+      "appName": "challenge_build_tools",
+      "appId": "0",
+      "architecture": "all",
+      "embeddedSdkVersion": "3.0",
+      "friendlyName": "Challenge Build Tools",
+      "user": {
+        "username": "sdk",
+        "group": "sdk"
+      },
+      "runMode": "never",
+      "runOptions": "my run options",
+      "vendor": "Axis Communications",
+      "vendorUrl": "https:www.axis.com",
+      "version": "1.0.0-alpha+2024"
+    },
+    "configuration": {
+      "settingPage": "index.html",
+      "httpConfig": [
+        {
+          "type": "fastCgi",
+          "name": "my-fast-cgi",
+          "access": "admin"
+        },
+        {
+          "type": "transferCgi",
+          "name": "my-transfer-cgi",
+          "access": "operator"
+        },
+        {
+          "type": "directory",
+          "access": "viewer"
+        }
+      ],
+      "paramConfig": [
+        {
+          "name": "my-parameter",
+          "default": "yes",
+          "type": "bool:no,yes"
+        }
+      ]
+    },
+    "copyProtection": {
+      "method": "none"
+    }
+  }
+}

apps/challenge_build_tools/src/main.rs

@@ -0,0 +1,7 @@
+//! An app designed to exercise many parts of the build tools, especially those not covered by
+//! other apps to find differences between the build tool implementations.
+//! It probably won't run since it is marked as architecture independent in the manifest.
+//!
+//! All applications require a program, but for this example it doesn't need to do anything,
+//! hence the empty main function.
+fn main() {}

crates/acap-build/Cargo.toml

@@ -5,8 +5,14 @@ edition = "2021"
 
 [dependencies]
 anyhow = { workspace = true }
+clap = { workspace = true, features = ["derive", "env"] }
+dirs = { workspace = true }
+env_logger = { workspace = true }
+glob = { workspace = true }
 log = { workspace = true }
 semver = { workspace = true }
 serde = { workspace = true, features = ["derive"] }
 serde_json = { workspace = true, features = ["preserve_order"] }
 tempfile = { workspace = true }
+regex = { workspace = true }
+tempdir = { workspace = true }