move to new cspot

components/spotify/cspot/bell/external/opus/cmake/OpusPackageVersion.cmake

@@ -0,0 +1,70 @@
+if(__opus_version)
+  return()
+endif()
+set(__opus_version INCLUDED)
+
+function(get_package_version PACKAGE_VERSION PROJECT_VERSION)
+
+  find_package(Git)
+  if(GIT_FOUND AND EXISTS "${CMAKE_CURRENT_LIST_DIR}/.git")
+    execute_process(COMMAND ${GIT_EXECUTABLE}
+                    --git-dir=${CMAKE_CURRENT_LIST_DIR}/.git describe
+                    --tags --match "v*" OUTPUT_VARIABLE OPUS_PACKAGE_VERSION)
+    if(OPUS_PACKAGE_VERSION)
+      string(STRIP ${OPUS_PACKAGE_VERSION}, OPUS_PACKAGE_VERSION)
+      string(REPLACE \n
+                     ""
+                     OPUS_PACKAGE_VERSION
+                     ${OPUS_PACKAGE_VERSION})
+      string(REPLACE ,
+                     ""
+                     OPUS_PACKAGE_VERSION
+                     ${OPUS_PACKAGE_VERSION})
+
+      string(SUBSTRING ${OPUS_PACKAGE_VERSION}
+                       1
+                       -1
+                       OPUS_PACKAGE_VERSION)
+      message(STATUS "Opus package version from git repo: ${OPUS_PACKAGE_VERSION}")
+    endif()
+
+  elseif(EXISTS "${CMAKE_CURRENT_LIST_DIR}/package_version"
+         AND NOT OPUS_PACKAGE_VERSION)
+    # Not a git repo, lets' try to parse it from package_version file if exists
+    file(STRINGS package_version OPUS_PACKAGE_VERSION
+         LIMIT_COUNT 1
+         REGEX "PACKAGE_VERSION=")
+    string(REPLACE "PACKAGE_VERSION="
+                   ""
+                   OPUS_PACKAGE_VERSION
+                   ${OPUS_PACKAGE_VERSION})
+    string(REPLACE "\""
+                   ""
+                   OPUS_PACKAGE_VERSION
+                   ${OPUS_PACKAGE_VERSION})
+    # In case we have a unknown dist here we just replace it with 0
+    string(REPLACE "unknown"
+                   "0"
+                   OPUS_PACKAGE_VERSION
+                   ${OPUS_PACKAGE_VERSION})
+      message(STATUS "Opus package version from package_version file: ${OPUS_PACKAGE_VERSION}")
+  endif()
+
+  if(OPUS_PACKAGE_VERSION)
+    string(REGEX
+      REPLACE "^([0-9]+.[0-9]+\\.?([0-9]+)?).*"
+               "\\1"
+               OPUS_PROJECT_VERSION
+               ${OPUS_PACKAGE_VERSION})
+  else()
+    # fail to parse version from git and package version
+    message(WARNING "Could not get package version.")
+    set(OPUS_PACKAGE_VERSION 0)
+    set(OPUS_PROJECT_VERSION 0)
+  endif()
+
+  message(STATUS "Opus project version: ${OPUS_PROJECT_VERSION}")
+
+  set(PACKAGE_VERSION ${OPUS_PACKAGE_VERSION} PARENT_SCOPE)
+  set(PROJECT_VERSION ${OPUS_PROJECT_VERSION} PARENT_SCOPE)
+endfunction()