build: use GIT_REPOSITORY for local URLs

`GIT_REPOSITORY` will cause cmake to rebuild if local dependency
changes, which isn't the case for `URL`.

Also document how to test a different commits of a dependency.

CMakeLists.txt

@@ -309,7 +309,7 @@ ExternalProject_Add(uncrustify
   CMAKE_ARGS ${DEPS_CMAKE_ARGS}
   CMAKE_CACHE_ARGS ${DEPS_CMAKE_CACHE_ARGS}
   EXCLUDE_FROM_ALL TRUE
-  ${EXTERNALPROJECT_OPTIONS})
+  DOWNLOAD_NO_PROGRESS TRUE)
 
 option(USE_BUNDLED_BUSTED "Use bundled busted" ON)
 if(USE_BUNDLED_BUSTED)
@@ -322,7 +322,7 @@ if(USE_BUNDLED_BUSTED)
     BUILD_COMMAND ""
     INSTALL_COMMAND ""
     EXCLUDE_FROM_ALL TRUE
-    ${EXTERNALPROJECT_OPTIONS})
+    DOWNLOAD_NO_PROGRESS TRUE)
 else()
   add_custom_target(lua-dev-deps)
 endif()

CONTRIBUTING.md

@@ -318,6 +318,30 @@ types, etc. See [:help dev-lua-doc][dev-lua-doc].
       - Private functions usually should be underscore-prefixed (named "_foo", not "foo").
 - Mark deprecated functions with `@deprecated`.
 
+Third-party dependencies
+------------------------
+
+To build Nvim using a different commit of a dependency change the appropriate
+URL in `cmake.deps/deps.txt`. For example, to use a different version of luajit
+replace the value in `LUAJIT_URL` with the wanted commit hash:
+
+```bash
+LUAJIT_URL https://github.com/LuaJIT/LuaJIT/archive/<sha>.tar.gz
+```
+
+Set `DEPS_IGNORE_SHA` to `TRUE` in `cmake.deps/CMakeLists.txt` to skip hash
+check from cmake.
+
+Alternatively, you may point the URL as a local path where the repository is.
+This is convenient when bisecting a problem in a dependency with `git bisect`.
+This requires running `make distclean` the first time once to remove traces of
+the previous build. Hash checking is always skipped in this case regardless of
+`DEPS_IGNORE_SHA`.
+
+```bash
+LUAJIT_URL /home/user/luajit
+```
+
 Reviewing
 ---------
 

cmake.deps/cmake/BuildGettext.cmake

@@ -1,8 +1,6 @@
 if(MSVC)
-  get_sha(gettext ${DEPS_IGNORE_SHA})
+  get_externalproject_options(gettext ${DEPS_IGNORE_SHA})
   ExternalProject_Add(gettext
-    URL ${GETTEXT_URL}
-    ${EXTERNALPROJECT_URL_HASH}
     DOWNLOAD_DIR ${DEPS_DOWNLOAD_DIR}/gettext
     PATCH_COMMAND ${CMAKE_COMMAND} -E copy
       ${CMAKE_CURRENT_SOURCE_DIR}/cmake/GettextCMakeLists.txt

cmake.deps/cmake/BuildLibiconv.cmake

@@ -1,8 +1,6 @@
 if(MSVC)
-  get_sha(libiconv ${DEPS_IGNORE_SHA})
+  get_externalproject_options(libiconv ${DEPS_IGNORE_SHA})
   ExternalProject_Add(libiconv
-    URL ${LIBICONV_URL}
-    ${EXTERNALPROJECT_URL_HASH}
     DOWNLOAD_DIR ${DEPS_DOWNLOAD_DIR}/libiconv
     PATCH_COMMAND ${CMAKE_COMMAND} -E copy
       ${CMAKE_CURRENT_SOURCE_DIR}/cmake/LibiconvCMakeLists.txt

cmake.deps/cmake/BuildLibuv.cmake

@@ -1,7 +1,5 @@
-get_sha(libuv ${DEPS_IGNORE_SHA})
+get_externalproject_options(libuv ${DEPS_IGNORE_SHA})
 ExternalProject_Add(libuv
-  URL ${LIBUV_URL}
-  ${EXTERNALPROJECT_URL_HASH}
   DOWNLOAD_DIR ${DEPS_DOWNLOAD_DIR}/libuv
   CMAKE_ARGS ${DEPS_CMAKE_ARGS}
     -D CMAKE_INSTALL_LIBDIR=lib

cmake.deps/cmake/BuildLibvterm.cmake

@@ -1,7 +1,5 @@
-get_sha(libvterm ${DEPS_IGNORE_SHA})
+get_externalproject_options(libvterm ${DEPS_IGNORE_SHA})
 ExternalProject_Add(libvterm
-  URL ${LIBVTERM_URL}
-  ${EXTERNALPROJECT_URL_HASH}
   DOWNLOAD_DIR ${DEPS_DOWNLOAD_DIR}/libvterm
   PATCH_COMMAND ${CMAKE_COMMAND} -E copy
     ${CMAKE_CURRENT_SOURCE_DIR}/cmake/LibvtermCMakeLists.txt

cmake.deps/cmake/BuildLpeg.cmake

@@ -1,7 +1,5 @@
-get_sha(lpeg ${DEPS_IGNORE_SHA})
+get_externalproject_options(lpeg ${DEPS_IGNORE_SHA})
 ExternalProject_Add(lpeg
-  URL ${LPEG_URL}
-  ${EXTERNALPROJECT_URL_HASH}
   DOWNLOAD_DIR ${DEPS_DOWNLOAD_DIR}/lpeg
   PATCH_COMMAND ${CMAKE_COMMAND} -E copy
     ${CMAKE_CURRENT_SOURCE_DIR}/cmake/LpegCMakeLists.txt

cmake.deps/cmake/BuildLua.cmake

@@ -40,10 +40,8 @@ set(LUA_CONFIGURE_COMMAND
       -i ${DEPS_BUILD_DIR}/src/lua/src/luaconf.h)
 set(LUA_INSTALL_TOP_ARG "INSTALL_TOP=${DEPS_INSTALL_DIR}")
 
-get_sha(lua ${DEPS_IGNORE_SHA})
+get_externalproject_options(lua ${DEPS_IGNORE_SHA})
 ExternalProject_Add(lua
-  URL ${LUA_URL}
-  ${EXTERNALPROJECT_URL_HASH}
   DOWNLOAD_DIR ${DEPS_DOWNLOAD_DIR}/lua
   CONFIGURE_COMMAND "${LUA_CONFIGURE_COMMAND}"
   BUILD_IN_SOURCE 1

cmake.deps/cmake/BuildLuajit.cmake

@@ -11,10 +11,8 @@ function(BuildLuajit)
     set(_luajit_TARGET "luajit")
   endif()
 
-  get_sha(luajit ${DEPS_IGNORE_SHA})
+  get_externalproject_options(luajit ${DEPS_IGNORE_SHA})
   ExternalProject_Add(${_luajit_TARGET}
-    URL ${LUAJIT_URL}
-    ${EXTERNALPROJECT_URL_HASH}
     DOWNLOAD_DIR ${DEPS_DOWNLOAD_DIR}/${_luajit_TARGET}
     CONFIGURE_COMMAND "${_luajit_CONFIGURE_COMMAND}"
     BUILD_IN_SOURCE 1

cmake.deps/cmake/BuildLuv.cmake

@@ -17,21 +17,17 @@ if(CMAKE_GENERATOR MATCHES "Unix Makefiles" AND
     list(APPEND LUV_CMAKE_ARGS -D CMAKE_MAKE_PROGRAM=gmake)
 endif()
 
-get_sha(lua_compat53 ${DEPS_IGNORE_SHA})
+get_externalproject_options(lua_compat53 ${DEPS_IGNORE_SHA})
 ExternalProject_Add(lua_compat53
-  URL ${LUA_COMPAT53_URL}
-  ${EXTERNALPROJECT_URL_HASH}
   DOWNLOAD_DIR ${DEPS_DOWNLOAD_DIR}/lua_compat53
   CONFIGURE_COMMAND ""
   BUILD_COMMAND ""
   INSTALL_COMMAND ""
   ${EXTERNALPROJECT_OPTIONS})
 
-get_sha(luv ${DEPS_IGNORE_SHA})
+get_externalproject_options(luv ${DEPS_IGNORE_SHA})
 ExternalProject_Add(luv
   DEPENDS lua_compat53
-  URL ${LUV_URL}
-  ${EXTERNALPROJECT_URL_HASH}
   DOWNLOAD_DIR ${DEPS_DOWNLOAD_DIR}/luv
   SOURCE_DIR ${DEPS_BUILD_DIR}/src/luv
   CMAKE_ARGS ${DEPS_CMAKE_ARGS} ${LUV_CMAKE_ARGS}

cmake.deps/cmake/BuildMsgpack.cmake

@@ -1,7 +1,5 @@
-get_sha(msgpack ${DEPS_IGNORE_SHA})
+get_externalproject_options(msgpack ${DEPS_IGNORE_SHA})
 ExternalProject_Add(msgpack
-  URL ${MSGPACK_URL}
-  ${EXTERNALPROJECT_URL_HASH}
   DOWNLOAD_DIR ${DEPS_DOWNLOAD_DIR}/msgpack
   CMAKE_ARGS ${DEPS_CMAKE_ARGS}
     -D MSGPACK_BUILD_TESTS=OFF

cmake.deps/cmake/BuildTreesitter.cmake

@@ -1,7 +1,5 @@
-get_sha(treesitter ${DEPS_IGNORE_SHA})
+get_externalproject_options(treesitter ${DEPS_IGNORE_SHA})
 ExternalProject_Add(treesitter
-  URL ${TREESITTER_URL}
-  ${EXTERNALPROJECT_URL_HASH}
   DOWNLOAD_DIR ${DEPS_DOWNLOAD_DIR}/treesitter
   PATCH_COMMAND ${CMAKE_COMMAND} -E copy
     ${CMAKE_CURRENT_SOURCE_DIR}/cmake/TreesitterCMakeLists.txt

cmake.deps/cmake/BuildTreesitterParsers.cmake

@@ -15,14 +15,10 @@ function(BuildTSParser)
     set(TS_CMAKE_FILE TreesitterParserCMakeLists.txt)
   endif()
 
-  set(NAME treesitter-${TS_LANG})
+  set(NAME treesitter_${TS_LANG})
-  string(TOUPPER "TREESITTER_${TS_LANG}_URL" URL_VARNAME)
-  set(URL ${${URL_VARNAME}})
 
-  get_sha(treesitter_${TS_LANG} ${DEPS_IGNORE_SHA})
+  get_externalproject_options(${NAME} ${DEPS_IGNORE_SHA})
   ExternalProject_Add(${NAME}
-    URL ${URL}
-    ${EXTERNALPROJECT_URL_HASH}
     DOWNLOAD_DIR ${DEPS_DOWNLOAD_DIR}/${NAME}
     PATCH_COMMAND ${CMAKE_COMMAND} -E copy
       ${CMAKE_CURRENT_SOURCE_DIR}/cmake/${TS_CMAKE_FILE}

cmake.deps/cmake/BuildUnibilium.cmake

@@ -1,7 +1,5 @@
-get_sha(unibilium ${DEPS_IGNORE_SHA})
+get_externalproject_options(unibilium ${DEPS_IGNORE_SHA})
 ExternalProject_Add(unibilium
-  URL ${UNIBILIUM_URL}
-  ${EXTERNALPROJECT_URL_HASH}
   DOWNLOAD_DIR ${DEPS_DOWNLOAD_DIR}/unibilium
   CMAKE_ARGS ${DEPS_CMAKE_ARGS}
   CMAKE_CACHE_ARGS ${DEPS_CMAKE_CACHE_ARGS}

cmake.deps/cmake/GetBinaryDeps.cmake

@@ -24,7 +24,7 @@ function(GetBinaryDep)
     BUILD_COMMAND ""
     INSTALL_COMMAND ${CMAKE_COMMAND} -E make_directory ${DEPS_BIN_DIR}
     COMMAND "${_gettool_INSTALL_COMMAND}"
-    ${EXTERNALPROJECT_OPTIONS})
+    DOWNLOAD_NO_PROGRESS TRUE)
 endfunction()
 
 # Download executable and move it to DEPS_BIN_DIR
@@ -49,5 +49,5 @@ function(GetExecutable)
     BUILD_COMMAND ""
     INSTALL_COMMAND ${CMAKE_COMMAND} -E make_directory ${DEPS_BIN_DIR}
     COMMAND ${CMAKE_COMMAND} -E copy <DOWNLOADED_FILE> ${DEPS_BIN_DIR}
-    ${EXTERNALPROJECT_OPTIONS})
+    DOWNLOAD_NO_PROGRESS TRUE)
 endfunction()

cmake/Deps.cmake

@@ -19,7 +19,6 @@ if(APPLE)
 endif()
 
 set(DEPS_CMAKE_CACHE_ARGS -DCMAKE_OSX_ARCHITECTURES:STRING=${CMAKE_OSX_ARCHITECTURES})
-set(EXTERNALPROJECT_OPTIONS DOWNLOAD_NO_PROGRESS TRUE)
 
 # MAKE_PRG
 if(UNIX)
@@ -55,10 +54,24 @@ if(CMAKE_OSX_ARCHITECTURES)
   endforeach()
 endif()
 
-function(get_sha name ignore)
+function(get_externalproject_options name DEPS_IGNORE_SHA)
-  unset(EXTERNALPROJECT_URL_HASH)
+  string(TOUPPER ${name} name_allcaps)
-  if(NOT ${ignore})
+  set(url ${${name_allcaps}_URL})
-    string(TOUPPER ${name} name_allcaps)
+
-    set(EXTERNALPROJECT_URL_HASH URL_HASH SHA256=${${name_allcaps}_SHA256} PARENT_SCOPE)
+  set(EXTERNALPROJECT_OPTIONS DOWNLOAD_NO_PROGRESS TRUE)
+
+  if(EXISTS ${url})
+    list(APPEND EXTERNALPROJECT_OPTIONS
+      GIT_REPOSITORY ${${name_allcaps}_URL})
+    if(${CMAKE_VERSION} VERSION_GREATER_EQUAL 3.18)
+      list(APPEND EXTERNALPROJECT_OPTIONS GIT_REMOTE_UPDATE_STRATEGY CHECKOUT)
+    endif()
+  else()
+    list(APPEND EXTERNALPROJECT_OPTIONS URL ${${name_allcaps}_URL})
+    if(NOT ${DEPS_IGNORE_SHA})
+      list(APPEND EXTERNALPROJECT_OPTIONS URL_HASH SHA256=${${name_allcaps}_SHA256})
+    endif()
   endif()
+
+  set(EXTERNALPROJECT_OPTIONS ${EXTERNALPROJECT_OPTIONS} PARENT_SCOPE)
 endfunction()