[tests,ci] Allow to build only tests

Signed-off-by: Mariusz Zaborski <oshogbo@invisiblethingslab.com>

.ci/lib/stage-build-test-only.jenkinsfile

@@ -0,0 +1,23 @@
+stage('build') {
+    try {
+        sh '''
+            meson setup build/ \
+                --werror \
+                --prefix="$PREFIX" \
+                --buildtype="$BUILDTYPE" \
+                -Dskeleton=disabled \
+                -Ddirect=disabled \
+                -Dsgx=disabled \
+                -Dtests=enabled \
+                $MESON_OPTIONS
+            ninja -vC build/
+        '''
+    } finally {
+        archiveArtifacts '''
+            build/meson-logs/**/*,
+        '''
+    }
+
+    sh 'rm -rf build'
+    sh 'git clean -Xf subprojects'
+}

.ci/linux-tests-only.jenkinsfile

@@ -0,0 +1,14 @@
+node('nonsgx_slave && aesni') {
+    checkout scm
+
+    load '.ci/lib/config-docker.jenkinsfile'
+    docker.build(
+        "local:${env.BUILD_TAG}",
+        '-f .ci/ubuntu20.04.dockerfile .'
+    ).inside("${env.DOCKER_ARGS_COMMON} --security-opt seccomp=${env.WORKSPACE}/scripts/docker_seccomp_mar_2021.json") {
+        load '.ci/lib/config.jenkinsfile'
+        load '.ci/lib/config-clang.jenkinsfile'
+
+        load '.ci/lib/stage-build-test-only.jenkinsfile'
+    }
+}

libos/meson.build

@@ -17,8 +17,10 @@ if host_machine.cpu_family() == 'x86_64'
     cflags_libos += ['-mfxsr', '-mxsave']
 endif
 
-subdir('include')
-subdir('src')
+if src_build
+  subdir('include')
+  subdir('src')
+endif
 
 if enable_tests
     subdir('test')

libos/test/regression/meson.build

@@ -192,7 +192,7 @@ if host_machine.cpu_family() == 'x86_64'
     }
 endif
 
-if sgx
+if sgx or force_sgx_tests
     tests += {
         'attestation': {
             # for `sgx_arch.h`

meson.build

@@ -50,6 +50,9 @@ vtune = get_option('vtune') == 'enabled'
 
 enable_libgomp = get_option('libgomp') == 'enabled'
 enable_tests = get_option('tests') == 'enabled'
+force_sgx_tests = get_option('force_sgx_tests') == 'enabled'
+
+src_build = skeleton or direct or sgx
 
 cc = meson.get_compiler('c')
 host_has_glibc = cc.get_define('__GLIBC__', prefix: '#include <features.h>') != ''
@@ -230,19 +233,22 @@ endif
 #
 # Dependencies
 #
+if src_build
+	tomlc99_proj = subproject('tomlc99-208203af46bdbdb29ba199660ed78d09c220b6c5')
+	tomlc99_dep = tomlc99_proj.get_variable('tomlc99_dep')
+	tomlc99_src = tomlc99_proj.get_variable('tomlc99_src')
 
-tomlc99_proj = subproject('tomlc99-208203af46bdbdb29ba199660ed78d09c220b6c5')
-tomlc99_dep = tomlc99_proj.get_variable('tomlc99_dep')
-tomlc99_src = tomlc99_proj.get_variable('tomlc99_src')
-
-uthash_dep = subproject('uthash-2.1.0').get_variable('uthash_dep')
+	uthash_dep = subproject('uthash-2.1.0').get_variable('uthash_dep')
+endif
 
 mbedtls_proj = subproject('mbedtls-3.6.0')
 mbedtls_static_dep = mbedtls_proj.get_variable('mbedtls_static_dep')
 mbedtls_pal_dep = mbedtls_proj.get_variable('mbedtls_pal_dep')
 
-curl_proj = subproject('curl-8.8.0')
-cjson_proj = subproject('cJSON-1.7.12')
+if src_build
+	curl_proj = subproject('curl-8.8.0')
+	cjson_proj = subproject('cJSON-1.7.12')
+endif
 
 if sgx
     # XXX: do not call subproject() from under "if sgx" conditional, because it
@@ -288,16 +294,22 @@ endif
 # The compilation
 #
 
-subdir('common')
-subdir('pal')
+if src_build
+  subdir('common')
+  subdir('pal')
+endif
 subdir('libos')
 subdir('python')
-subdir('tools')
+if src_build
+  subdir('tools')
+endif
 
-if get_option('libc') == 'glibc'
-    subproject('glibc-2.39-1')
-elif get_option('libc') == 'musl'
-    subproject('musl-1.2.4')
+if src_build
+  if get_option('libc') == 'glibc'
+      subproject('glibc-2.39-1')
+  elif get_option('libc') == 'musl'
+      subproject('musl-1.2.4')
+  endif
 endif
 
 if enable_libgomp

meson_options.txt

@@ -11,6 +11,8 @@ option('libc', type: 'combo', choices: ['none', 'glibc', 'musl'],
 
 option('tests', type: 'combo', choices: ['disabled', 'enabled'],
     description: 'Build test binaries')
+option('force_sgx_tests', type: 'combo', choices: ['disabled', 'enabled'],
+    description: 'Build sgx tests even if sgx is not enabled')
 
 option('dcap', type: 'combo', choices: ['disabled', 'enabled'],
     description: 'Build additional utilities linked against DCAP library')

pal/meson.build

@@ -1,8 +1,10 @@
-subdir('include')
-subdir('src')
+if src_build
+  subdir('include')
+  subdir('src')
 
-if enable_tests
-    subdir('regression')
+  if enable_tests
+      subdir('regression')
+  endif
 endif
 
 if debug

python/graminelibos/__init__.py

@@ -6,7 +6,8 @@
 _CONFIG_PKGLIBDIR = '@PKGLIBDIR@'
 _CONFIG_LIBDIR = '@LIBDIR@'
 _CONFIG_SYSLIBDIR = '@SYSLIBDIR@'
-_CONFIG_SGX_ENABLED = '@SGX_ENABLED@' == '1'
+_CONFIG_SGX_ENABLED = _os.path.exists('@SYSLIBDIR@/gramine/sgx/libpal.so')
+
 
 if __version__.startswith('@') and not _os.getenv('GRAMINE_IMPORT_FOR_SPHINX_ANYWAY') == '1':
     raise RuntimeError(