[fusl] Add llvm's lit tool to third_party

third_party/lit/lit/formats/base.py

Index: third_party/lit/lit/formats/base.py
diff --git a/third_party/lit/lit/formats/base.py b/third_party/lit/lit/formats/base.py
new file mode 100644
index 0000000000000000000000000000000000000000..9e5420ba7672c96edc7303bd3a02f4324136f62d
--- /dev/null
+++ b/third_party/lit/lit/formats/base.py
@@ -0,0 +1,118 @@
+from __future__ import absolute_import
+import os
+import sys
+
+import lit.Test
+import lit.util
+
+class TestFormat(object):
+    pass
+
+###
+
+class FileBasedTest(TestFormat):
+    def getTestsInDirectory(self, testSuite, path_in_suite,
+                            litConfig, localConfig):
+        source_path = testSuite.getSourcePath(path_in_suite)
+        for filename in os.listdir(source_path):
+            # Ignore dot files and excluded tests.
+            if (filename.startswith('.') or
+                filename in localConfig.excludes):
+                continue
+
+            filepath = os.path.join(source_path, filename)
+            if not os.path.isdir(filepath):
+                base,ext = os.path.splitext(filename)
+                if ext in localConfig.suffixes:
+                    yield lit.Test.Test(testSuite, path_in_suite + (filename,),
+                                        localConfig)
+
+###
+
+import re
+import tempfile
+
+class OneCommandPerFileTest(TestFormat):
+    # FIXME: Refactor into generic test for running some command on a directory
+    # of inputs.
+
+    def __init__(self, command, dir, recursive=False,
+                 pattern=".*", useTempInput=False):
+        if isinstance(command, str):
+            self.command = [command]
+        else:
+            self.command = list(command)
+        if dir is not None:
+            dir = str(dir)
+        self.dir = dir
+        self.recursive = bool(recursive)
+        self.pattern = re.compile(pattern)
+        self.useTempInput = useTempInput
+
+    def getTestsInDirectory(self, testSuite, path_in_suite,
+                            litConfig, localConfig):
+        dir = self.dir
+        if dir is None:
+            dir = testSuite.getSourcePath(path_in_suite)
+
+        for dirname,subdirs,filenames in os.walk(dir):
+            if not self.recursive:
+                subdirs[:] = []
+
+            subdirs[:] = [d for d in subdirs
+                          if (d != '.svn' and
+                              d not in localConfig.excludes)]
+
+            for filename in filenames:
+                if (filename.startswith('.') or
+                    not self.pattern.match(filename) or
+                    filename in localConfig.excludes):
+                    continue
+
+                path = os.path.join(dirname,filename)
+                suffix = path[len(dir):]
+                if suffix.startswith(os.sep):
+                    suffix = suffix[1:]
+                test = lit.Test.Test(
+                    testSuite, path_in_suite + tuple(suffix.split(os.sep)),
+                    localConfig)
+                # FIXME: Hack?
+                test.source_path = path
+                yield test
+
+    def createTempInput(self, tmp, test):
+        abstract
+
+    def execute(self, test, litConfig):
+        if test.config.unsupported:
+            return (lit.Test.UNSUPPORTED, 'Test is unsupported')
+
+        cmd = list(self.command)
+
+        # If using temp input, create a temporary file and hand it to the
+        # subclass.
+        if self.useTempInput:
+            tmp = tempfile.NamedTemporaryFile(suffix='.cpp')
+            self.createTempInput(tmp, test)
+            tmp.flush()
+            cmd.append(tmp.name)
+        elif hasattr(test, 'source_path'):
+            cmd.append(test.source_path)
+        else:
+            cmd.append(test.getSourcePath())
+
+        out, err, exitCode = lit.util.executeCommand(cmd)
+
+        diags = out + err
+        if not exitCode and not diags.strip():
+            return lit.Test.PASS,''
+
+        # Try to include some useful information.
+        report = """Command: %s\n""" % ' '.join(["'%s'" % a
+                                                 for a in cmd])
+        if self.useTempInput:
+            report += """Temporary File: %s\n""" % tmp.name
+            report += "--\n%s--\n""" % open(tmp.name).read()
+        report += """Output:\n--\n%s--""" % diags
+
+        return lit.Test.FAIL, report