issue 9910

Add a Py_SetPath api to override magic path computations when starting up python.

1 files changed, 24 insertions, 0 deletions

diff --git a/PC/getpathp.c b/PC/getpathp.c
index 0fe04c7..3a87411 100644
--- a/PC/getpathp.c
+++ b/PC/getpathp.c
@@ -51,6 +51,9 @@
     exe, some very strange installation setup) you get a path with
     some default, but relative, paths.
 
+  * An embedding application can use Py_SetPath() to override all of
+    these authomatic path computations.
+
    ---------------------------------------------------------------- */
 
 
@@ -79,6 +82,9 @@
  * The approach is an adaptation for Windows of the strategy used in
  * ../Modules/getpath.c; it uses the Windows Registry as one of its
  * information sources.
+ *
+ * Py_SetPath() can be used to override this mechanism.  Call Py_SetPath
+ * with a semicolon separated path prior to calling Py_Initialize.
  */
 
 #ifndef LANDMARK
@@ -654,6 +660,24 @@ calculate_path(void)
 
 /* External interface */
 
+void
+Py_SetPath(const wchar_t *path)
+{
+    if (module_search_path != NULL) {
+        free(module_search_path);
+        module_search_path = NULL;
+    }
+    if (path != NULL) {
+        extern wchar_t *Py_GetProgramName(void);
+        wchar_t *prog = Py_GetProgramName();
+        wcsncpy(progpath, prog, MAXPATHLEN);
+        prefix[0] = L'\0';
+        module_search_path = malloc((wcslen(path) + 1) * sizeof(wchar_t));
+        if (module_search_path != NULL)
+            wcscpy(module_search_path, path);
+	}
+}
+
 wchar_t *
 Py_GetPath(void)
 {