From fcc08f25b083178ad13dc18f003b6d1c15904620 Mon Sep 17 00:00:00 2001
From: Nicholas O'Connor <nrfoconnor@gmail.com>
Date: Wed, 5 Jul 2017 13:13:04 -0700
Subject: [PATCH] push git related logic to cmake, now that i know how to do
 that kind of thing

---
 CMakeLists.txt          |  8 ++++++-
 cmake/Modules/Git.cmake | 52 +++++++++++++++++++++++++++++++++++++++++
 cogrc                   |  3 +--
 src/version.cpp.cog     | 33 ++++++++++++++------------
 4 files changed, 78 insertions(+), 18 deletions(-)
 create mode 100644 cmake/Modules/Git.cmake

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5e4756d..fbd03f0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -23,6 +23,9 @@ SET(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/lib/cellar")
 # which point to directories outside the build tree to the install RPATH
 SET(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)
 
+include(Git)
+git_init()
+
 include(Ronn)
 
 find_package(PythonInterp)
@@ -40,7 +43,10 @@ http://tclap.sourceforge.net and put the headers in ./include
 (wink, nudge)")
 endif(NOT TCLAP_FOUND)
 
-include_directories(include)
+include_directories("${CMAKE_SOURCE_DIR}/include")
+configure_file("${CMAKE_SOURCE_DIR}/include/cmake.hpp.in"
+                "${CMAKE_CURRENT_BINARY_DIR}/include/cmake.hpp")
+include_directories("${CMAKE_CURRENT_BINARY_DIR}/include")
 set(src "${CMAKE_SOURCE_DIR}/src")
 
 set(coggedfiles)
diff --git a/cmake/Modules/Git.cmake b/cmake/Modules/Git.cmake
new file mode 100644
index 0000000..702c1ea
--- /dev/null
+++ b/cmake/Modules/Git.cmake
@@ -0,0 +1,52 @@
+function(git_init)
+    set(options "")
+    set(oneValueArgs SUBMODULE_DIR)
+    set(multiValueArgs "")
+    cmake_parse_arguments(GIT_INIT "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
+
+    set(GIT_SUBMODULE_DIR "${GIT_INIT_SUBMODULE_DIR}" PARENT_SCOPE)
+    set(GIT_SUBMODULE_DIR_ABS "${CMAKE_SOURCE_DIR}/${GIT_INIT_SUBMODULE_DIR}" PARENT_SCOPE)
+
+    execute_process(COMMAND git rev-parse --git-dir
+        WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}"
+        OUTPUT_QUIET
+        RESULT_VARIABLE GIT_REPO_RESULT)
+
+    if ("${GIT_REPO_RESULT}" STREQUAL "0")
+        set(IS_GIT_REPO TRUE)
+        set(IS_GIT_REPO TRUE PARENT_SCOPE)
+    else("${GIT_REPO_RESULT}" STREQUAL "0")
+        set(IS_GIT_REPO FALSE)
+        set(IS_GIT_REPO FALSE PARENT_SCOPE)
+    endif("${GIT_REPO_RESULT}" STREQUAL "0")
+
+    if(IS_GIT_REPO)
+        execute_process(COMMAND git log --pretty=format:%H -n 1
+            OUTPUT_VARIABLE GIT_COMMIT_HASH)
+        string(STRIP "${GIT_COMMIT_HASH}" GIT_COMMIT_HASH)
+        set(GIT_COMMIT_HASH ${GIT_COMMIT_HASH} PARENT_SCOPE)
+        
+        execute_process(COMMAND git symbolic-ref HEAD
+            COMMAND cut -d/ -f3
+            OUTPUT_VARIABLE GIT_BRANCH)
+        string(STRIP "${GIT_BRANCH}" GIT_BRANCH)
+        set(GIT_BRANCH ${GIT_BRANCH} PARENT_SCOPE)
+
+        message(STATUS "commit ${GIT_COMMIT_HASH}, branch ${GIT_BRANCH}")
+    else(IS_GIT_REPO)
+        message(STATUS "This is not a git repo, assuming this tarball actually packaged everything...")
+    endif(IS_GIT_REPO)
+endfunction(git_init)
+
+function(git_submodule)
+    if(IS_GIT_REPO)
+        set(oneValueArgs TARGET REMOTE_URL)
+        set(multiValueArgs "")
+        cmake_parse_arguments(GIT_SUBMODULE "" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
+
+        execute_process(COMMAND git submodule update --init -- "${GIT_SUBMODULE_DIR}/${GIT_SUBMODULE_TARGET}"
+            WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}"
+            COMMENT "Updating submodule ${GIT_SUBMODULE_DIR}/${GIT_SUBMODULE_TARGET}"
+            VERBATIM)
+    endif(IS_GIT_REPO)
+endfunction(git_submodule)
diff --git a/cogrc b/cogrc
index 97faaaa..bb156c8 100644
--- a/cogrc
+++ b/cogrc
@@ -1,6 +1,5 @@
 [version]
-release=no
-release_version=0.3
+release_version=0.4
 
 [defaults]
 wine-path=wine
diff --git a/src/version.cpp.cog b/src/version.cpp.cog
index e7d0bef..704c320 100644
--- a/src/version.cpp.cog
+++ b/src/version.cpp.cog
@@ -1,9 +1,13 @@
 // vim: filetype=cpp :
 #include <iostream>
 #include <string>
+#ifdef IS_GIT_REPO
+#include <sstream>
+#endif
 #include <vector>
 
 #include "cellar.hpp"
+#include "cmake.hpp"
 #include "internal/core.hpp"
 #include "commands.hpp"
 #include "output.hpp"
@@ -24,25 +28,24 @@ string cellar::version::short_version() {
          cparse.read("cogrc")
          config = cparse["version"]
 
-         if config.getboolean("release"):
-            outstring = "version {0}, built {1}".format(config["release_version"], str(today))
-         else:
-            try:
-                import subprocess
-                cmdoutput = subprocess.check_output(["git", "symbolic-ref", "HEAD"]).decode().strip()
-                gitbranch = cmdoutput.split("/")[2]
-
-                githash = subprocess.check_output(["git", "rev-parse", "HEAD"]).decode().strip()
-                outstring = "{0} {1}, built {2}".format(gitbranch, githash, str(today))
-            except:
-                outstring = "exception raised when trying to read git data at precompile time"
-                raise
-
-         cog.outl("return string(\"{0}\");".format(outstring))
+         cog.outl("return \"version {0}, built {1}\";".format(config["release_version"], str(today)))
     ]]]*/
     //[[[end]]]
 }
 
 void cellar::core::print_version(int argc, vector<string> argv) {
     cellar::output::statement(short_version());
+
+    #ifdef IS_GIT_REPO
+    stringstream sstr;
+    sstr << "git commit ";
+    sstr << GIT_COMMIT_HASH;
+
+    sstr << " (branch ";
+    sstr << GIT_BRANCH;
+    sstr << ")";
+
+    // " >> git commit d34db33fcafe (branch master)"
+    cellar::output::statement(sstr.str());
+    #endif
 }