Alternative symlink-creating mode for file(INSTALL ...)

An new environment variable 'CMAKE_INSTALL_MODE' is introduced,
which can be used to ask CMake to create symbolic links
instead of copying files during a file(INSTALL ...).

The operation is at the file level only, directory trees are
still created using actual directories, not links.

Signed-off-by: Felix Lelchuk <felix.lelchuk@gmx.de>

1 files changed, 17 insertions, 0 deletions

diff --git a/Source/cmInstallMode.h b/Source/cmInstallMode.h
new file mode 100644
index 0000000..5343d34
--- /dev/null
+++ b/Source/cmInstallMode.h
@@ -0,0 +1,17 @@
+/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+   file Copyright.txt or https://cmake.org/licensing for details.  */
+#pragma once
+
+/**
+ * Enumerate types known to file(INSTALL).
+ */
+enum class cmInstallMode
+{
+  COPY,
+  ABS_SYMLINK,
+  ABS_SYMLINK_OR_COPY,
+  REL_SYMLINK,
+  REL_SYMLINK_OR_COPY,
+  SYMLINK,
+  SYMLINK_OR_COPY
+};