Add diff subcommand (#87)

* Add diff subcommand

* edit error codes

* address review comments

* Update src/subcommand/diff_subcommand.cpp

Co-authored-by: Johan Mabille <johan.mabille@gmail.com>

---------

Co-authored-by: Johan Mabille <johan.mabille@gmail.com>

Author: SandrineP

CMakeLists.txt

@@ -48,6 +48,8 @@ set(GIT2CPP_SRC
     ${GIT2CPP_SOURCE_DIR}/subcommand/checkout_subcommand.hpp
     ${GIT2CPP_SOURCE_DIR}/subcommand/clone_subcommand.cpp
     ${GIT2CPP_SOURCE_DIR}/subcommand/clone_subcommand.hpp
+    ${GIT2CPP_SOURCE_DIR}/subcommand/diff_subcommand.cpp
+    ${GIT2CPP_SOURCE_DIR}/subcommand/diff_subcommand.hpp
     ${GIT2CPP_SOURCE_DIR}/subcommand/commit_subcommand.cpp
     ${GIT2CPP_SOURCE_DIR}/subcommand/commit_subcommand.hpp
     ${GIT2CPP_SOURCE_DIR}/subcommand/config_subcommand.cpp
@@ -98,10 +100,16 @@ set(GIT2CPP_SRC
     ${GIT2CPP_SOURCE_DIR}/wrapper/commit_wrapper.hpp
     ${GIT2CPP_SOURCE_DIR}/wrapper/config_wrapper.cpp
     ${GIT2CPP_SOURCE_DIR}/wrapper/config_wrapper.hpp
+    ${GIT2CPP_SOURCE_DIR}/wrapper/diff_wrapper.cpp
+    ${GIT2CPP_SOURCE_DIR}/wrapper/diff_wrapper.hpp
+    ${GIT2CPP_SOURCE_DIR}/wrapper/diffstats_wrapper.cpp
+    ${GIT2CPP_SOURCE_DIR}/wrapper/diffstats_wrapper.hpp
     ${GIT2CPP_SOURCE_DIR}/wrapper/index_wrapper.cpp
     ${GIT2CPP_SOURCE_DIR}/wrapper/index_wrapper.hpp
     ${GIT2CPP_SOURCE_DIR}/wrapper/object_wrapper.cpp
     ${GIT2CPP_SOURCE_DIR}/wrapper/object_wrapper.hpp
+    ${GIT2CPP_SOURCE_DIR}/wrapper/patch_wrapper.cpp
+    ${GIT2CPP_SOURCE_DIR}/wrapper/patch_wrapper.hpp
     ${GIT2CPP_SOURCE_DIR}/wrapper/rebase_wrapper.cpp
     ${GIT2CPP_SOURCE_DIR}/wrapper/rebase_wrapper.hpp
     ${GIT2CPP_SOURCE_DIR}/wrapper/refs_wrapper.cpp
@@ -116,6 +124,8 @@ set(GIT2CPP_SRC
     ${GIT2CPP_SOURCE_DIR}/wrapper/signature_wrapper.hpp
     ${GIT2CPP_SOURCE_DIR}/wrapper/status_wrapper.cpp
     ${GIT2CPP_SOURCE_DIR}/wrapper/status_wrapper.hpp
+    ${GIT2CPP_SOURCE_DIR}/wrapper/tree_wrapper.cpp
+    ${GIT2CPP_SOURCE_DIR}/wrapper/tree_wrapper.hpp
     ${GIT2CPP_SOURCE_DIR}/wrapper/wrapper_base.hpp
     ${GIT2CPP_SOURCE_DIR}/main.cpp
     ${GIT2CPP_SOURCE_DIR}/version.hpp

src/main.cpp

@@ -11,6 +11,7 @@
 #include "subcommand/clone_subcommand.hpp"
 #include "subcommand/commit_subcommand.hpp"
 #include "subcommand/config_subcommand.hpp"
+#include "subcommand/diff_subcommand.hpp"
 #include "subcommand/fetch_subcommand.hpp"
 #include "subcommand/init_subcommand.hpp"
 #include "subcommand/log_subcommand.hpp"
@@ -45,6 +46,7 @@ int main(int argc, char** argv)
         clone_subcommand clone(lg2_obj, app);
         commit_subcommand commit(lg2_obj, app);
         config_subcommand config(lg2_obj, app);
+        diff_subcommand diff(lg2_obj, app);
         fetch_subcommand fetch(lg2_obj, app);
         reset_subcommand reset(lg2_obj, app);
         log_subcommand log(lg2_obj, app);

src/subcommand/checkout_subcommand.cpp

@@ -24,7 +24,7 @@ void checkout_subcommand::run()
 
     if (repo.state() != GIT_REPOSITORY_STATE_NONE)
     {
-        throw std::runtime_error("Cannot checkout, repository is in unexpected state");
+         throw std::runtime_error("Cannot checkout, repository is in unexpected state");
     }
 
     git_checkout_options options;