vim: import ycm_extra_conf from the internet

https://github.com/arximboldi/dotfiles/blob/master/emacs/.ycm_extra_conf.py

diff --git a/vim/ycm_extra_conf.py b/vim/ycm_extra_conf.py
index b4202ef2c8cd69ac15f977c4acd1581a01a0ae06..f02f0173f61f1c2ea1acacae56a83e5f2031a011 100644 (file)
--- a/vim/ycm_extra_conf.py
+++ b/vim/ycm_extra_conf.py
@@ -1,86 +1,174 @@
-from glob import glob
-from os import path
+# https://github.com/Valloric/ycmd/blob/master/cpp/ycm/.ycm_extra_conf.py
+# https://jonasdevlieghere.com/a-better-youcompleteme-config/

 
 

+import os
+import os.path
+import logging

 import ycm_core
 
 import ycm_core
 

+BASE_FLAGS = [
+    '-Wall',
+    '-std=c++1z',
+    '-xc++',
+    '-I/usr/lib/'
+    '-I/usr/include/'
+]

 
 

-def findCompilationDatabaseFolder(dir='.'):
-    dirs = [path.dirname(f) for f in glob(dir + '/**/compile_commands.json',
-                                          recursive=True)]
-    return dirs
+SOURCE_EXTENSIONS = [
+    '.cpp',
+    '.cxx',
+    '.cc',
+    '.c',
+    '.m',
+    '.mm'
+]

 
 

+HEADER_EXTENSIONS = [
+    '.h',
+    '.hxx',
+    '.hpp',
+    '.hh'
+]

 
 

-def generateQtFlags():
-    flags = ['-isystem', '/usr/include/qt/']
-    for p in glob('/usr/include/qt/*/'):
-        flags += ['-isystem', p]
-    return flags
+def find_similar_file_in_database(dbpath, filename):
+    import json
+    import Levenshtein
+    logging.info("Trying to find some file close to: " + filename)
+    db = json.load(open(dbpath))
+    best_filename = ''
+    best_distance = 1 << 31
+    for entry in db:
+        entry_filename = os.path.normpath(
+            os.path.join(entry["directory"], entry["file"]))
+        distance = Levenshtein.distance(str(filename), str(entry_filename))
+        if distance < best_distance:
+            best_filename = entry_filename
+            best_distance = distance
+    return best_filename

 
 

+def ok_compilation_info(info):
+    return bool(info.compiler_flags_)

 
 

-def isHeader(filename):
-    ext = path.splitext(filename)[1]
-    return ext in ['.hpp', '.h']
-
-
-def GetCompilationInfoForFile(database, filename):
-    if isHeader(filename):
-        basename = path.splitext(filename)[0]
-        for ext in ['.cpp', '.c']:
-            cpp_file = basename + ext
-            if path.exists(cpp_file):
-                compilation_info = database.GetCompilationInfoForFile(
-                    cpp_file)
-                if compilation_info.compiler_flags_:
-                    return compilation_info
-        return None
-    return database.GetCompilationInfoForFile(filename)
+def get_compilation_info_for_file(dbpath, database, filename):
+    info = database.GetCompilationInfoForFile(filename)
+    if ok_compilation_info(info):
+        logging.info("Flags for file where found in database: " + filename)
+        return info
+    else:
+        logging.info("Flags for file not found in database: " + filename)
+        basename = os.path.splitext(filename)[0]
+        for extension in SOURCE_EXTENSIONS:
+            replacement_file = basename + extension
+            logging.info("Trying to replace extension with: " + extension)
+            info = database.GetCompilationInfoForFile(replacement_file)
+            if ok_compilation_info(info):
+                logging.info("Replacing header with: " + replacement_file)
+                return info
+        replacement_file = find_similar_file_in_database(dbpath, filename)
+        logging.info("Replacing header with: " + replacement_file)
+        return database.GetCompilationInfoForFile(replacement_file)

 
 

+def find_nearest(path, target):
+    candidates = [
+        os.path.join(path, target),
+        os.path.join(path, 'build', target),
+        os.path.join(path, 'output', target),
+    ]
+    for candidate in candidates:
+        if os.path.isfile(candidate) or os.path.isdir(candidate):
+            logging.info("Found nearest " + target + " at " + candidate)
+            return candidate
+    parent = os.path.dirname(os.path.abspath(path))
+    if parent == path:
+        raise RuntimeError("Could not find " + target)
+    return find_nearest(parent, target)

 
 

-def FlagsForFile(filename, **kwargs):
-    client_data = kwargs['client_data']
-    cwd = client_data['getcwd()']
+def make_relative_paths_in_flags_absolute(flags, working_directory):
+    if not working_directory:
+        return list(flags)
+    new_flags = []
+    make_next_absolute = False
+    path_flags = [ '-isystem', '-I', '-iquote', '--sysroot=' ]
+    for flag in flags:
+        new_flag = flag
+        if make_next_absolute:
+            make_next_absolute = False
+            if not flag.startswith('/'):
+                new_flag = os.path.join(working_directory, flag)
+        for path_flag in path_flags:
+            if flag == path_flag:
+                make_next_absolute = True
+                break
+            if flag.startswith(path_flag):
+                path = flag[ len(path_flag): ]
+                new_flag = path_flag + os.path.join(working_directory, path)
+                break
+        if new_flag:
+            new_flags.append(new_flag)
+    return new_flags

 
 

-    extra_flags = [
-        '-Wall',
-        '-Wextra',
-        # '-Wshadow',
-        # '-Werror',
-        # '-Wc++98-compat',
-        # '-Wno-long-long',
-        # '-Wno-variadic-macros',
-        # '-fexceptions',
-        # '-DNDEBUG',
-    ]
+def flags_for_clang_complete(root):
+    try:
+        clang_complete_path = find_nearest(root, '.clang_complete')
+        clang_complete_flags = open(clang_complete_path, 'r').read().splitlines()
+        return clang_complete_flags
+    except Exception, err:
+        logging.info("Error while looking flags for .clang_complete in root: " + root)
+        logging.error(err)
+        return None

 
 

-    folders = findCompilationDatabaseFolder(cwd)
-    if not folders:
-        folder = None
-    else:
-        folder = folders[0]
-        if len(folders) > 1:
-            print("Multiple compilation databases found!")
-            print(folders)
-            print("Selecting first: %s" % (folder))
+def flags_for_include(root):
+    try:
+        include_path = find_nearest(root, 'include')
+        flags = []
+        for dirroot, dirnames, filenames in os.walk(include_path):
+            for dir_path in dirnames:
+                real_path = os.path.join(dirroot, dir_path)
+                flags = flags + ["-I" + real_path]
+        return flags
+    except Exception, err:
+        logging.info("Error while looking flags for includes in root: " + root)
+        logging.error(err)
+        return None

 
 

-    if folder:
-        database = ycm_core.CompilationDatabase(folder)
-        compilation_info = GetCompilationInfoForFile(database, filename)
+def flags_for_compilation_database(root, filename):
+    try:
+        compilation_db_path = find_nearest(root, 'compile_commands.json')
+        compilation_db_dir = os.path.dirname(compilation_db_path)
+        logging.info("Set compilation database directory to " + compilation_db_dir)
+        compilation_db = ycm_core.CompilationDatabase(compilation_db_dir)
+        if not compilation_db:
+            logging.info("Compilation database file found but unable to load")
+            return None
+        compilation_info = get_compilation_info_for_file(
+            compilation_db_path, compilation_db, filename)

         if not compilation_info:
         if not compilation_info:

+            logging.info("No compilation info for " + filename + " in compilation database")

             return None
             return None

-        flags = list(compilation_info.compiler_flags_)
-    else:
-        flags = [
-            '-std=c++14',
-            '-stdlib=libstdc++',
-            '-x', 'c++',
-            '-isystem', '/usr/include',
-            '-isystem', '/usr/local/include',
-            '-I', cwd,
-            '-I', cwd + '/include',
-        ]
-        flags += generateQtFlags()
+        return make_relative_paths_in_flags_absolute(
+            compilation_info.compiler_flags_,
+            compilation_info.compiler_working_dir_)
+    except Exception, err:
+        logging.info("Error while trying to get flags for " + filename + " in compilation database")
+        logging.error(err)
+        return None

 
 

+def flags_for_file(filename):
+    root = os.path.realpath(filename)
+    compilation_db_flags = flags_for_compilation_database(root, filename)
+    if compilation_db_flags:
+        final_flags = compilation_db_flags
+    else:
+        final_flags = BASE_FLAGS
+        clang_flags = flags_for_clang_complete(root)
+        if clang_flags:
+            final_flags = final_flags + clang_flags
+        include_flags = flags_for_include(root)
+        if include_flags:
+            final_flags = final_flags + include_flags

     return {
     return {

-        'flags': flags + extra_flags,
+        'flags': final_flags,

         'do_cache': True
     }
         'do_cache': True
     }

+
+FlagsForFile = flags_for_file