lib/oeqa/selftest/cases/gotoolchain: add selftest for the Go toolchain

Add a simple test case to being testing of the Go toolchain:
1) build meta-go-toolchain
2) create a temp directory and install the generated Go toolchain within
3) fetch an archive of the Go Dep tool
4) create an appropriately laid out GOROOT and inflate the dep archive there
5) build the dep command with the SDK's Go toolchain and check it returned
   successfully.

[YOCTO #12152]

(From OE-Core rev: bca999644e28e1666357bcbeab685547c6f9dd65)

Signed-off-by: Joshua Lock <joshua.g.lock@intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/oeqa/selftest/cases/gotoolchain.py

@@ -0,0 +1,67 @@
+import glob
+import os
+import shutil
+import tempfile
+from oeqa.selftest.case import OESelftestTestCase
+from oeqa.utils.commands import runCmd, bitbake, get_bb_vars
+
+
+class oeGoToolchainSelfTest(OESelftestTestCase):
+    """
+    Test cases for OE's Go toolchain
+    """
+
+    @staticmethod
+    def get_sdk_environment(tmpdir_SDKQA):
+        pattern = os.path.join(tmpdir_SDKQA, "environment-setup-*")
+        # FIXME: this is a very naive implementation
+        return glob.glob(pattern)[0]
+
+    @staticmethod
+    def get_sdk_toolchain():
+        bb_vars = get_bb_vars(['SDK_DEPLOY', 'TOOLCHAIN_OUTPUTNAME'],
+                              "meta-go-toolchain")
+        sdk_deploy = bb_vars['SDK_DEPLOY']
+        toolchain_name = bb_vars['TOOLCHAIN_OUTPUTNAME']
+        return os.path.join(sdk_deploy, toolchain_name + ".sh")
+
+    @classmethod
+    def setUpClass(cls):
+        super(oeGoToolchainSelfTest, cls).setUpClass()
+        cls.tmpdir_SDKQA = tempfile.mkdtemp(prefix='SDKQA')
+        cls.go_path = os.path.join(cls.tmpdir_SDKQA, "go")
+        # Build the SDK and locate it in DEPLOYDIR
+        bitbake("meta-go-toolchain")
+        cls.sdk_path = oeGoToolchainSelfTest.get_sdk_toolchain()
+        # Install the SDK into the tmpdir
+        runCmd("sh %s -y -d \"%s\"" % (cls.sdk_path, cls.tmpdir_SDKQA))
+        cls.env_SDK = oeGoToolchainSelfTest.get_sdk_environment(cls.tmpdir_SDKQA)
+
+    @classmethod
+    def tearDownClass(cls):
+        shutil.rmtree(cls.tmpdir_SDKQA, ignore_errors=True)
+        super(oeGoToolchainSelfTest, cls).tearDownClass()
+
+    def run_sdk_go_command(self, gocmd):
+        cmd = "cd %s; " % self.tmpdir_SDKQA
+        cmd = cmd + ". %s; " % self.env_SDK
+        cmd = cmd + "export GOPATH=%s; " % self.go_path
+        cmd = cmd + "${CROSS_COMPILE}go %s" % gocmd
+        return runCmd(cmd).status
+
+    def test_go_dep_build(self):
+        proj = "github.com/golang"
+        name = "dep"
+        ver = "v0.3.1"
+        archive = ".tar.gz"
+        url = "https://%s/%s/archive/%s%s" % (proj, name, ver, archive)
+
+        runCmd("cd %s; wget %s" % (self.tmpdir_SDKQA, url))
+        runCmd("cd %s; tar -xf %s" % (self.tmpdir_SDKQA, ver+archive))
+        runCmd("mkdir -p %s/src/%s" % (self.go_path, proj))
+        runCmd("mv %s/dep-0.3.1 %s/src/%s/%s"
+               % (self.tmpdir_SDKQA, self.go_path, proj, name))
+        retv = self.run_sdk_go_command('build  %s/%s/cmd/dep'
+                                       % (proj, name))
+        self.assertEqual(retv, 0,
+                         msg="Running go build failed for %s" % name)