From 111e3df45dddd5b4ae98ad957f8183980c90a503 Mon Sep 17 00:00:00 2001
From: Jussi Pakkanen <jpakkane@gmail.com>
Date: Wed, 10 May 2017 19:31:12 +0300
Subject: [PATCH] Moved coverage commands to a standalone script.

---
 mesonbuild/backend/ninjabackend.py | 12 ++++++
 mesonbuild/coredata.py             |  1 +
 mesonbuild/mesonmain.py            |  3 ++
 mesonbuild/scripts/coverage.py     | 61 ++++++++++++++++++++++++++++++
 4 files changed, 77 insertions(+)
 create mode 100644 mesonbuild/scripts/coverage.py

diff --git a/mesonbuild/backend/ninjabackend.py b/mesonbuild/backend/ninjabackend.py
index 4885f4bbe..572724805 100644
--- a/mesonbuild/backend/ninjabackend.py
+++ b/mesonbuild/backend/ninjabackend.py
@@ -567,6 +567,18 @@ int dummy;
         self.processed_targets[target.name + target.type_suffix()] = True
 
     def generate_coverage_rules(self, outfile):
+        e = NinjaBuildElement(self.all_outputs, 'coverage', 'CUSTOM_COMMAND', 'PHONY')
+        e.add_item('COMMAND', [sys.executable,
+                               self.environment.get_build_command(),
+                               '--internal', 'coverage',
+                               self.environment.get_source_dir(),
+                               self.environment.get_build_dir(),
+                               self.environment.get_log_dir()])
+        e.add_item('description', 'Generates coverage reports.')
+        e.write(outfile)
+        self.generate_coverage_legacy_rules(outfile)
+
+    def generate_coverage_legacy_rules(self, outfile):
         (gcovr_exe, lcov_exe, genhtml_exe) = environment.find_coverage_tools()
         added_rule = False
         if gcovr_exe:
diff --git a/mesonbuild/coredata.py b/mesonbuild/coredata.py
index a336278b2..7bc20f8b6 100644
--- a/mesonbuild/coredata.py
+++ b/mesonbuild/coredata.py
@@ -334,6 +334,7 @@ forbidden_target_names = {'clean': None,
                           'clean-ctlist': None,
                           'clean-gcno': None,
                           'clean-gcda': None,
+                          'coverage': None,
                           'coverage-text': None,
                           'coverage-xml': None,
                           'coverage-html': None,
diff --git a/mesonbuild/mesonmain.py b/mesonbuild/mesonmain.py
index 282df363d..4fecc5847 100644
--- a/mesonbuild/mesonmain.py
+++ b/mesonbuild/mesonmain.py
@@ -249,6 +249,9 @@ def run_script_command(args):
     elif cmdname == 'dist':
         import mesonbuild.scripts.dist as abc
         cmdfunc = abc.run
+    elif cmdname == 'coverage':
+        import mesonbuild.scripts.coverage as abc
+        cmdfunc = abc.run
     else:
         raise MesonException('Unknown internal command {}.'.format(cmdname))
     return cmdfunc(cmdargs)
diff --git a/mesonbuild/scripts/coverage.py b/mesonbuild/scripts/coverage.py
new file mode 100644
index 000000000..59e475a84
--- /dev/null
+++ b/mesonbuild/scripts/coverage.py
@@ -0,0 +1,61 @@
+# Copyright 2017 The Meson development team
+
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+
+#     http://www.apache.org/licenses/LICENSE-2.0
+
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from mesonbuild import environment
+
+import sys, os, subprocess, re
+
+def coverage(source_root, build_root, log_dir):
+    (gcovr_exe, lcov_exe, genhtml_exe) = environment.find_coverage_tools()
+    if gcovr_exe:
+        subprocess.check_call([gcovr_exe,
+                               '-x',
+                               '-r', source_root,
+                               '-o', os.path.join(log_dir, 'coverage.xml'),
+                               ])
+        subprocess.check_call([gcovr_exe,
+                               '-r', source_root,
+                               '-o', os.path.join(log_dir, 'coverage.txt'),
+                               ])
+    if lcov_exe and genhtml_exe:
+        htmloutdir = os.path.join(log_dir, 'coveragereport')
+        covinfo = os.path.join(log_dir, 'coverage.info')
+        lcov_command = [lcov_exe,
+                        '--directory', build_root,
+                        '--capture',
+                        '--output-file', covinfo,
+                        '--no-checksum',
+                        '--rc', 'lcov_branch_coverage=1',
+                        ]
+        genhtml_command = [genhtml_exe,
+                           '--prefix', build_root,
+                           '--output-directory', htmloutdir,
+                           '--title', 'Code coverage',
+                           '--legend',
+                           '--show-details',
+                           '--branch-coverage',
+                           covinfo]
+        subprocess.check_call(lcov_command)
+        subprocess.check_call(genhtml_command)
+    return 0
+
+def run(args):
+    if not os.path.isfile('build.ninja'):
+        print('Coverage currently only works with the Ninja backend.')
+        return 1
+    source_root, build_root, log_dir = args[:]
+    return coverage(source_root, build_root, log_dir)
+
+if __name__ == '__main__':
+    sys.exit(run(sys.argv[1:]))
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