From c6e8fe8125f8900f3019716aa1cfbf18ff8264bd Mon Sep 17 00:00:00 2001
From: dec05eba <dec05eba@protonmail.com>
Date: Sat, 28 Mar 2020 07:15:16 +0100
Subject: Add support for absolute paths in include_dirs config

---
 backend/ninja/Ninja.cpp | 13 ++++++++++---
 include/FileUtil.hpp    |  1 +
 src/CmakeModule.cpp     | 13 ++++++++++---
 src/FileUtil.cpp        | 21 +++++++++++++++++++++
 4 files changed, 42 insertions(+), 6 deletions(-)

diff --git a/backend/ninja/Ninja.cpp b/backend/ninja/Ninja.cpp
index 87370cf..99b276e 100644
--- a/backend/ninja/Ninja.cpp
+++ b/backend/ninja/Ninja.cpp
@@ -796,10 +796,17 @@ namespace backend
 #endif
         for(const auto &includeDir : config.getIncludeDirs())
         {
-            string includeDirRelative = "../../../";
-            includeDirRelative += includeDir;
             globalIncDir += " ";
-            globalIncDir += getIncludeOptionFlag(config.getCompiler(), includeDirRelative);
+            if(isPathAbsolute(includeDir))
+            {
+                globalIncDir += getIncludeOptionFlag(config.getCompiler(), includeDir);
+            }
+            else
+            {
+                string includeDirRelative = "../../../";
+                includeDirRelative += includeDir;
+                globalIncDir += getIncludeOptionFlag(config.getCompiler(), includeDirRelative);
+            }
         }
 
         auto parentGlobalIncludeDirCallback = globalIncludeDirCallback;
diff --git a/include/FileUtil.hpp b/include/FileUtil.hpp
index b88d58a..0108b24 100644
--- a/include/FileUtil.hpp
+++ b/include/FileUtil.hpp
@@ -72,6 +72,7 @@ namespace sibs
     Result<FileString> getRealPath(const _tinydir_char_t *path);
     bool pathEquals(const std::string &path, const std::string &otherPath);
     Result<u64> getFileLastModifiedTime(const _tinydir_char_t *path);
+    bool isPathAbsolute(const std::string &path);
 }
 
 #endif //SIBS_FILEUTIL_HPP
diff --git a/src/CmakeModule.cpp b/src/CmakeModule.cpp
index 8c97b6e..a690948 100644
--- a/src/CmakeModule.cpp
+++ b/src/CmakeModule.cpp
@@ -190,10 +190,17 @@ namespace sibs
 #endif
         for(const auto &includeDir : config.getIncludeDirs())
         {
-            FileString includeDirRelative = FileString("../../../");
-            includeDirRelative += toFileString(includeDir);
             cflags += TINYDIR_STRING(" ");
-            cflags += getIncludeOptionFlag(config.getCompiler(), includeDirRelative);
+            if(isPathAbsolute(includeDir))
+            {
+                cflags += getIncludeOptionFlag(config.getCompiler(), toFileString(includeDir));
+            }
+            else
+            {
+                FileString includeDirRelative = FileString("../../../");
+                includeDirRelative += toFileString(includeDir);
+                cflags += getIncludeOptionFlag(config.getCompiler(), includeDirRelative);
+            }
         }
 
         cxxflags = cflags;
diff --git a/src/FileUtil.cpp b/src/FileUtil.cpp
index a03161f..1fd86d6 100644
--- a/src/FileUtil.cpp
+++ b/src/FileUtil.cpp
@@ -178,6 +178,27 @@ namespace sibs
     }
 #endif
 
+#if OS_FAMILY == OS_FAMILY_POSIX
+    bool isPathAbsolute(const std::string &path)
+    {
+        return !path.empty() && path[0] == '/';
+    }
+#else
+    static bool isAlpha(char c)
+    {
+        return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z');
+    }
+
+    bool isPathAbsolute(const std::string &path)
+    {
+        if(path.size() >= 3 && isAlpha(path[0]) && path[1] == ':' && (path[2] == '\\' || path[2] == '/'))
+            return true;
+        else if(path.size() >= 4 && memcmp(path.data(), "\\\\?\\", 4) == 0)
+            return true;
+        return false;
+    }
+#endif
+
     // TODO: Handle failure (directory doesn't exist, no permission etc)
     void walkDir(const _tinydir_char_t *directory, FileWalkCallbackFunc callbackFunc)
     {
-- 
cgit v1.2.3