From a1901941f8de5de54e0da1fe314d92bf705bca38 Mon Sep 17 00:00:00 2001
From: "Justin M. Keyes" <justinkz@gmail.com>
Date: Tue, 7 Oct 2014 05:45:05 +0000
Subject: version: generate "build number" from commit timestamp

- cmake: git_timestamp() returns last commit time formatted as
  `YYYYMMddHHmm`.
- Always include commit hash in :version and --version output.

`nvim --version` sample output:
  NVIM 0.0.0-alpha+201410070245 (compiled Oct  7 2014 05:30:45)
  Commit: f747b2b1ff7bfe7eb00cc2be82d7af87c98f1111
---
 cmake/GetGitRevisionDescription.cmake | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

(limited to 'cmake/GetGitRevisionDescription.cmake')

diff --git a/cmake/GetGitRevisionDescription.cmake b/cmake/GetGitRevisionDescription.cmake
index d77c89eda9..42775057f1 100644
--- a/cmake/GetGitRevisionDescription.cmake
+++ b/cmake/GetGitRevisionDescription.cmake
@@ -126,6 +126,35 @@ function(git_describe _var)
   set(${_var} "${out}" PARENT_SCOPE)
 endfunction()
 
+function(git_timestamp _var)
+  if(NOT GIT_FOUND)
+    find_package(Git QUIET)
+  endif()
+  get_git_head_revision(refspec hash)
+  if(NOT GIT_FOUND)
+    set(${_var} "GIT-NOTFOUND" PARENT_SCOPE)
+    return()
+  endif()
+  if(NOT hash)
+    set(${_var} "HEAD-HASH-NOTFOUND" PARENT_SCOPE)
+    return()
+  endif()
+
+  execute_process(COMMAND "${GIT_EXECUTABLE}" log -1 --format="%ci" ${hash} ${ARGN}
+    WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}"
+    RESULT_VARIABLE res
+    OUTPUT_VARIABLE out
+    ERROR_QUIET
+    OUTPUT_STRIP_TRAILING_WHITESPACE)
+  if(NOT res EQUAL 0)
+    set(out "${out}-${res}-NOTFOUND")
+  endif()
+  string(REGEX REPLACE "[-\" :]" "" out ${out})
+  string(SUBSTRING ${out} 0 12 out)
+
+  set(${_var} ${out} PARENT_SCOPE)
+endfunction()
+
 function(git_get_exact_tag _var)
   git_describe(out --exact-match ${ARGN})
   set(${_var} "${out}" PARENT_SCOPE)
-- 
cgit