update examples to use new syntax where possible (#218)

Author: TheLartians

README.md

@@ -47,6 +47,8 @@ On the other hand, if `VERSION` hasn't been explicitly specified, CPM can automa
 `GIT_TAG` can also be set to a specific commit or a branch name such as `master` to always download the most recent version.
 The optional argument `FIND_PACKAGE_ARGUMENTS` can be specified to a string of parameters that will be passed to `find_package` if enabled (see below).
 
+If an additional optional parameter `EXCLUDE_FROM_ALL` is set to a truthy value, then any targets defined inside the dependency won't be built by default. See the [CMake docs](https://cmake.org/cmake/help/latest/prop_tgt/EXCLUDE_FROM_ALL.html) for details.
+
 A single-argument compact syntax is also supported:
 
 ```cmake
@@ -58,7 +60,7 @@ CPMAddPackage("uri#tag")
 CPMAddPackage("uri@version#tag")
 ```
 
-In the shorthand syntax if the URI is of the form `gh:user/name`, it is interpreted as GitHub URI and converted to `https://github.com/user/name.git`. If the URI is of the form `gl:user/name`, it is interpreted as a [GitLab](https://gitlab.com/explore/) URI and coverted to `https://gitlab.com/user/name.git`. Otherwise the URI used verbatim as a git URL.
+In the shorthand syntax if the URI is of the form `gh:user/name`, it is interpreted as GitHub URI and converted to `https://github.com/user/name.git`. If the URI is of the form `gl:user/name`, it is interpreted as a [GitLab](https://gitlab.com/explore/) URI and coverted to `https://gitlab.com/user/name.git`. Otherwise the URI used verbatim as a git URL. All packages added using the shorthand syntax will be added using the [EXCLUDE_FROM_ALL](https://cmake.org/cmake/help/latest/prop_tgt/EXCLUDE_FROM_ALL.html) flag.
 
 After calling `CPMAddPackage` or `CPMFindPackage`, the following variables are defined in the local scope, where `<dependency>` is the name of the dependency.
 
@@ -82,8 +84,7 @@ add_executable(tests tests.cpp)
 
 # add dependencies
 include(cmake/CPM.cmake)
-
-CPMAddPackage(gh:catchorg/Catch2@2.5.0)
+CPMAddPackage("gh:catchorg/Catch2@2.5.0")
 
 # link dependencies
 target_link_libraries(tests Catch2)

examples/benchmark/CMakeLists.txt

@@ -6,11 +6,7 @@ project(CPMExampleBenchmark)
 
 include(../../cmake/CPM.cmake)
 
-CPMAddPackage(
-  NAME fibonacci
-  GITLAB_REPOSITORY TheLartians/Fibonacci
-  VERSION 2.0
-)
+CPMAddPackage("gh:TheLartians/Fibonacci@2.0")
 
 CPMAddPackage(
   NAME benchmark

examples/catch2/CMakeLists.txt

@@ -6,17 +6,8 @@ project(CPMExampleCatch2)
 
 include(../../cmake/CPM.cmake)
 
-CPMAddPackage(
-  NAME fibonacci
-  GITHUB_REPOSITORY TheLartians/Fibonacci
-  VERSION 2.0
-)
-
-CPMAddPackage(
-  NAME Catch2
-  GITHUB_REPOSITORY catchorg/Catch2
-  VERSION 2.13.4
-)
+CPMAddPackage("gh:TheLartians/Fibonacci@2.0")
+CPMAddPackage("gh:catchorg/Catch2@2.13.4")
 
 # ---- Create binary ----
 

examples/doctest/CMakeLists.txt

@@ -6,17 +6,8 @@ project(CPMExampleDoctest)
 
 include(../../cmake/CPM.cmake)
 
-CPMAddPackage(
-  NAME fibonacci
-  GITLAB_REPOSITORY TheLartians/Fibonacci
-  VERSION 2.0
-)
-
-CPMAddPackage(
-  NAME doctest
-  GITHUB_REPOSITORY onqtam/doctest
-  GIT_TAG 2.4.5
-)
+CPMAddPackage("gh:TheLartians/Fibonacci@2.0")
+CPMAddPackage("gh:onqtam/doctest#2.4.5")
 
 # ---- Create binary ----
 

examples/fmt/CMakeLists.txt

@@ -6,11 +6,7 @@ project(CPMJSONExample)
 
 include(../../cmake/CPM.cmake)
 
-CPMAddPackage(
-  NAME fmt
-  GIT_TAG 7.1.3
-  GITHUB_REPOSITORY fmtlib/fmt
-)
+CPMAddPackage("gh:fmtlib/fmt#7.1.3")
 
 # ---- Executable ----
 

examples/gtest/CMakeLists.txt

@@ -6,11 +6,7 @@ project(CPMExampleGtest)
 
 include(../../cmake/CPM.cmake)
 
-CPMAddPackage(
-  NAME fibonacci
-  GITLAB_REPOSITORY TheLartians/Fibonacci
-  VERSION 2.0
-)
+CPMAddPackage("gh:TheLartians/Fibonacci@2.0")
 
 CPMAddPackage(
   NAME googletest

examples/linenoise/CMakeLists.txt

@@ -6,11 +6,7 @@ project(CPMlinenoiseExample)
 
 include(../../cmake/CPM.cmake)
 
-CPMAddPackage(
-  NAME linenoise
-  GIT_TAG 1.0
-  GITHUB_REPOSITORY antirez/linenoise
-)
+CPMAddPackage("gh:antirez/linenoise#1.0")
 
 if(linenoise_ADDED)
   add_library(linenoise ${linenoise_SOURCE_DIR}/linenoise.c)

examples/spdlog/CMakeLists.txt

@@ -6,11 +6,7 @@ project(CPMSpdlogExample)
 
 include(../../cmake/CPM.cmake)
 
-CPMAddPackage(
-  NAME spdlog
-  GITHUB_REPOSITORY gabime/spdlog
-  VERSION 1.8.2
-)
+CPMAddPackage("gh:gabime/spdlog@1.8.2")
 
 # ---- Executable ----