Run conan install in parallel

app/build.gradle

@@ -1,3 +1,5 @@
+import org.apache.tools.ant.filters.ReplaceTokens
+
 plugins {
     id 'com.android.application'
     id 'com.google.gms.google-services'
@@ -10,35 +12,57 @@ android {
 
 tasks.register('conanProfile', Copy) {
     from "conanprofile.txt"
-    into "build/"
+    into project.layout.buildDirectory
+    filter(ReplaceTokens, tokens: ["NDK_PATH": android.ndkDirectory.toString()])
+}
 
-    doLast {
-        def file = file("build/conanprofile.txt")
-        def content = file.text
-        content = content.replace("<NDK_PATH>", android.ndkDirectory.toString())
-        file.write(content)
+abstract class ConanInstallTask extends Exec {
+    @Input
+    abstract Property<String> getArch()
+
+    // Cannot read project.layout.buildDirectory when configuration-cache is enabled
+    @Input
+    abstract Property<String> getArchBuildDirPath()
+
+    @OutputDirectory
+    final Provider<Directory> outputDirectory = archBuildDirPath.map { new File(it) }
+
+    @Override
+    protected void exec() {
+        commandLine(
+            "conan", "install", ".",
+            "--output-folder=" + archBuildDirPath.get(),
+            "--build=missing",
+            "--profile:host=build/conanprofile.txt",
+            "-s", "arch=" + arch.get(),
+            "-s", "build_type=Release",
+            "-s", "&:build_type=RelWithDebInfo",
+            "-s", "odrcore/*:build_type=RelWithDebInfo",
+        )
+        super.exec()
     }
 }
 
-tasks.register('conanInstall') {
-    dependsOn(tasks.named("conanProfile"))
-    doFirst {
-        ["armv7", "armv8", "x86", "x86_64"].each { String arch ->
-            exec {
-                commandLine(
-                    "conan", "install", ".",
-                    "--output-folder=build/conan/" + arch,
-                    "--build=missing",
-                    "--profile:host=build/conanprofile.txt",
-                    "-s", "arch=" + arch,
-                    "-s", "build_type=Release",
-                    "-s", "&:build_type=RelWithDebInfo",
-                    "-s", "odrcore/*:build_type=RelWithDebInfo",
-                )
-            }
+["armv8", "armv7", "x86", "x86_64"].each { architecture ->
+    tasks.register('conanInstall-' + architecture, ConanInstallTask) {
+        setArch(architecture)
+        setArchBuildDirPath(new File(project.layout.buildDirectory.get().toString(), 'conan/' + architecture).absolutePath)
+        dependsOn(tasks.named("conanProfile"))
+
+        // Execute at least one conanInstall before running all three others in parallel.
+        // Some issue with conan's local cache
+        // @TODO: isolate and report to conan-client bugtracker
+        if (architecture != "armv8") {
+            dependsOn(tasks.named("conanInstall-armv8"))
         }
     }
 }
+tasks.register("conanInstall") {
+    ["armv7", "armv8", "x86", "x86_64"].each { arch ->
+        dependsOn tasks.named('conanInstall-' + arch)
+    }
+}
+
 tasks.named("preBuild").configure { preBuildTask ->
     preBuildTask.dependsOn(tasks.named("conanInstall"))
 }
@@ -176,7 +200,8 @@ dependencies {
 // Without removing .cxx dir on cleanup, double gradle clean is erroring out.
 // Before removing this workaround, check if "./gradlew assembleDebug; ./gradlew clean; ./gradlew clean" works
 tasks.named("clean") {
+    def dotCxxDir = layout.projectDirectory.dir(".cxx")
     doFirst {
-        delete getLayout().getProjectDirectory().dir(".cxx")
+        delete dotCxxDir
     }
 }

app/conanprofile.txt

@@ -9,5 +9,5 @@ compiler.cppstd=17
 compiler.libcxx=c++_shared
 
 [conf]
-tools.android:ndk_path=<NDK_PATH>
+tools.android:ndk_path=@NDK_PATH@
 tools.build:skip_test=True

gradle.properties

@@ -17,3 +17,7 @@ android.useAndroidX=true
 android.defaults.buildfeatures.buildconfig=true
 android.nonTransitiveRClass=true
 android.nonFinalResIds=true
+
+# Enabling Gradle's configuration cache ( https://docs.gradle.org/current/userguide/configuration_cache.html ) executes some Gradle tasks in parallel.
+# In our case it's required to execute conanInstall's in parallel. In case of problems - disable or comment out for un-paralleled conan installs
+org.gradle.configuration-cache=true

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,7 @@
-#Fri Jun 24 20:32:41 CEST 2022
 distributionBase=GRADLE_USER_HOME
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.6-bin.zip
 distributionPath=wrapper/dists
-zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.9-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

gradlew

@@ -15,6 +15,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
+# SPDX-License-Identifier: Apache-2.0
+#
 
 ##############################################################################
 #
@@ -55,7 +57,7 @@
 #       Darwin, MinGW, and NonStop.
 #
 #   (3) This script is generated from the Groovy template
-#       https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       https://github.com/gradle/gradle/blob/HEAD/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
 #       within the Gradle project.
 #
 #       You can find Gradle at https://github.com/gradle/gradle/.
@@ -80,13 +82,12 @@ do
     esac
 done
 
-APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
-
-APP_NAME="Gradle"
+# This is normally unused
+# shellcheck disable=SC2034
 APP_BASE_NAME=${0##*/}
-
-# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s
+' "$PWD" ) || exit
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD=maximum
@@ -133,22 +134,29 @@ location of your Java installation."
     fi
 else
     JAVACMD=java
-    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
 
 Please set the JAVA_HOME variable in your environment to match the
 location of your Java installation."
+    fi
 fi
 
 # Increase the maximum file descriptors if we can.
 if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
     case $MAX_FD in #(
       max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
         MAX_FD=$( ulimit -H -n ) ||
             warn "Could not query maximum file descriptor limit"
     esac
     case $MAX_FD in  #(
       '' | soft) :;; #(
       *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
         ulimit -n "$MAX_FD" ||
             warn "Could not set maximum file descriptor limit to $MAX_FD"
     esac
@@ -193,18 +201,28 @@ if "$cygwin" || "$msys" ; then
     done
 fi
 
-# Collect all arguments for the java command;
-#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
-#     shell script including quotes and variable substitutions, so put them in
-#     double quotes to make sure that they get re-expanded; and
-#   * put everything else in single quotes, so that it's not re-expanded.
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
 
 set -- \
         "-Dorg.gradle.appname=$APP_BASE_NAME" \
         -classpath "$CLASSPATH" \
         org.gradle.wrapper.GradleWrapperMain \
         "$@"
 
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
 # Use "xargs" to parse quoted args.
 #
 # With -n1 it outputs one arg per line, with the quotes and backslashes removed.

gradlew.bat

@@ -13,8 +13,10 @@
 @rem See the License for the specific language governing permissions and
 @rem limitations under the License.
 @rem
+@rem SPDX-License-Identifier: Apache-2.0
+@rem
 
-@if "%DEBUG%" == "" @echo off
+@if "%DEBUG%"=="" @echo off
 @rem ##########################################################################
 @rem
 @rem  Gradle startup script for Windows
@@ -25,7 +27,8 @@
 if "%OS%"=="Windows_NT" setlocal
 
 set DIRNAME=%~dp0
-if "%DIRNAME%" == "" set DIRNAME=.
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
 set APP_BASE_NAME=%~n0
 set APP_HOME=%DIRNAME%
 
@@ -40,13 +43,13 @@ if defined JAVA_HOME goto findJavaFromJavaHome
 
 set JAVA_EXE=java.exe
 %JAVA_EXE% -version >NUL 2>&1
-if "%ERRORLEVEL%" == "0" goto execute
+if %ERRORLEVEL% equ 0 goto execute
 
-echo.
-echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
-echo.
-echo Please set the JAVA_HOME variable in your environment to match the
-echo location of your Java installation.
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
 
 goto fail
 
@@ -56,11 +59,11 @@ set JAVA_EXE=%JAVA_HOME%/bin/java.exe
 
 if exist "%JAVA_EXE%" goto execute
 
-echo.
-echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
-echo.
-echo Please set the JAVA_HOME variable in your environment to match the
-echo location of your Java installation.
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
 
 goto fail
 
@@ -75,13 +78,15 @@ set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
 
 :end
 @rem End local scope for the variables with windows NT shell
-if "%ERRORLEVEL%"=="0" goto mainEnd
+if %ERRORLEVEL% equ 0 goto mainEnd
 
 :fail
 rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
 rem the _cmd.exe /c_ return code!
-if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
-exit /b 1
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
 
 :mainEnd
 if "%OS%"=="Windows_NT" endlocal