2 files changed, 58 insertions, 0 deletions
diff --git a/contrib/YouCompleteMe/README.md b/contrib/YouCompleteMe/README.md
new file mode 100644
index 0000000000..6560d03d07
--- /dev/null
+++ b/contrib/YouCompleteMe/README.md
@@ -0,0 +1,15 @@
+# YouCompleteMe
+
+## Installation
+
+### Step 1
+
+Install [YouCompleteMe](https://github.com/Valloric/YouCompleteMe).
+
+### Step 2
+
+```bash
+cp ycm_extra_conf.py ../../src/.ycm_extra_conf.py
+echo src/.ycm_extra_conf.py >> ../../.git/info/exclude
+make -C ../.. cmake
+```
diff --git a/contrib/YouCompleteMe/ycm_extra_conf.py b/contrib/YouCompleteMe/ycm_extra_conf.py
new file mode 100644
index 0000000000..9fd2ba8b8d
--- /dev/null
+++ b/contrib/YouCompleteMe/ycm_extra_conf.py
@@ -0,0 +1,43 @@
+# .ycm_extra_conf.py for nvim source code.
+import os, ycm_core
+
+
+def DirectoryOfThisScript():
+    return os.path.dirname(os.path.abspath(__file__))
+
+
+def GetDatabase():
+    compilation_database_folder = DirectoryOfThisScript() + '/../build'
+    if os.path.exists(compilation_database_folder):
+        return ycm_core.CompilationDatabase(compilation_database_folder)
+    return None
+
+
+def IsHeaderFile(filename):
+    extension = os.path.splitext(filename)[1]
+    return extension == '.h'
+
+
+def GetCompilationInfoForFile(filename):
+    database = GetDatabase()
+    if not database:
+        return None
+    if IsHeaderFile(filename):
+        basename = os.path.splitext(filename)[0]
+        replacement_file = basename + '.c'
+        if os.path.exists(replacement_file):
+            compilation_info = database.GetCompilationInfoForFile(replacement_file)
+            if compilation_info.compiler_flags_:
+                return compilation_info
+        return None
+    return database.GetCompilationInfoForFile(filename)
+
+
+def FlagsForFile(filename):
+    compilation_info = GetCompilationInfoForFile(filename)
+    if not compilation_info:
+        return None
+    return {
+        'flags': compilation_info.compiler_flags_,
+        'do_cache': True
+    }