1 files changed, 71 insertions, 0 deletions
diff --git a/mesonbuild/scripts/fakeall.py b/mesonbuild/scripts/fakeall.py
new file mode 100644
index 0000000..1630c10
--- /dev/null
+++ b/mesonbuild/scripts/fakeall.py
@@ -0,0 +1,71 @@
+# Copyright 2019 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.
+
+import json, os, sys, subprocess
+
+def scan_file(src):
+    moddeps = []
+    for line in open(src):
+        if line.startswith('import '):
+            line = line.strip()
+            modnum = line.split('M')[-1][:-1]
+            d = 'src{}.ixx'.format(modnum)
+            if d not in moddeps:
+                moddeps.append(d)
+    return moddeps
+
+def scan_deps():
+    compdb = json.load(open('compile_commands.json'))
+    src2obj = {}
+    name2path = {}
+    mmap = {}
+    obj_deps = {} # AWFUL HACK! Should put the dep on the generated ifc file instead but can't because of Ninja limitation of one output per rule if you need dep files as well.
+    for o in compdb:
+        full_srcname = o['file']
+        srcname = os.path.split(full_srcname)[1]
+        objname = o['output']
+        assert(srcname.endswith('.ixx') or srcname.endswith('.cpp'))
+        src2obj[srcname] = objname
+        name2path[srcname] = full_srcname
+    for o in compdb:
+        full_srcname = o['file']
+        objname = o['output']
+        srcname = os.path.split(full_srcname)[1]
+        mod_deps = scan_file(full_srcname)
+        obj_deps[objname] = [src2obj[x] for x in mod_deps]
+    #for k, v in obj_deps.items():
+    #    print(k, '=>', v)
+    return obj_deps
+
+def rewrite_ninja(obj_deps):
+    ifilename = 'build.ninja.hackbak'
+    ofilename = 'build.ninja'
+    ofile = open(ofilename, 'w')
+    for line in open(ifilename):
+        if line.startswith('build '):
+            line = line.strip()
+            out, deps = line.split(':', 1)
+            out_obj = out.split(' ', 1)[1]
+            dep_objs = obj_deps.get(out_obj, [])
+            if len(dep_objs) > 0:
+                deps += ' | ' + ' '.join(dep_objs)
+            line = out + ':' + deps + '\n'
+        ofile.write(line)
+
+def run(args):
+    print('Scanning and rewriting Ninja file.')
+    obj_deps = scan_deps()
+    rewrite_ninja(obj_deps)
+    sys.exit(subprocess.run(['ninja', 'all']).returncode)
+