.git_archival.txt

@@ -1,3 +0,0 @@
-node: $Format:%H$
-node-date: $Format:%cI$
-describe-name: $Format:%(describe:tags=true,match=?[0-9.]*)$

.gitattributes

@@ -1 +0,0 @@
-.git_archival.txt  export-subst

CMakeLists.txt

@@ -1,28 +0,0 @@
-cmake_minimum_required(VERSION 3.14 FATAL_ERROR)
-
-if(EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/.git/")
-  find_package(Git REQUIRED)
-  execute_process(
-    COMMAND "${GIT_EXECUTABLE}" describe --tags --match=?[0-9.]*
-    WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
-    OUTPUT_VARIABLE DESCRIBE_NAME COMMAND_ERROR_IS_FATAL ANY
-  )
-  set(CPM_DEVELOPMENT "-development-version")
-else()
-  file(STRINGS "${CMAKE_CURRENT_SOURCE_DIR}/.git_archival.txt" DESCRIBE_NAME
-       REGEX "^describe-name:.*"
-  )
-endif()
-
-string(REGEX MATCH "([0-9\\.]+)" EXTRACTED_CPM_VERSION "${DESCRIBE_NAME}")
-
-project(
-  CPM.cmake
-  VERSION "${EXTRACTED_CPM_VERSION}"
-  DESCRIPTION
-    "CMake's missing package manager. A small CMake script for setup-free, cross-platform, reproducible dependency management."
-  HOMEPAGE_URL "https://github.com/cpm-cmake/CPM.cmake"
-  LANGUAGES NONE
-)
-
-include("${CMAKE_CURRENT_SOURCE_DIR}/cmake/CPM.cmake")

README.md

@@ -80,7 +80,6 @@ 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`, however this isn't recommended, as such packages will only be updated when the cache is cleared.
 
 `PATCHES` takes a list of patch files to apply sequentially. For a basic example, see [Highway](examples/highway/CMakeLists.txt).
-We recommend that if you use `PATCHES`, you also set `CPM_SOURCE_CACHE`. See [issue 577](https://github.com/cpm-cmake/CPM.cmake/issues/577).
 
 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.
 
@@ -88,7 +87,7 @@ If an additional optional parameter `SYSTEM` is set to a truthy value, the SYSTE
 See the [add_subdirectory ](https://cmake.org/cmake/help/latest/command/add_subdirectory.html?highlight=add_subdirectory)
 and [SYSTEM](https://cmake.org/cmake/help/latest/prop_tgt/SYSTEM.html#prop_tgt:SYSTEM) target property for details.
 
-A shorthand syntax is also supported:
+A single-argument compact syntax is also supported:
 
 ```cmake
 # A git package from a given uri with a version
@@ -112,19 +111,6 @@ CPMAddPackage("https://example.com/my-package-1.2.3.zip#MD5=68e20f674a48be38d60e
 CPMAddPackage("https://example.com/my-package.zip@1.2.3")
 ```
 
-Additionally, if needed, extra arguments can be provided while using single argument syntax by using the shorthand syntax with the `URI` specifier.
-
-```cmake
-CPMAddPackage(
-  URI "gh:nlohmann/json@3.9.1"
-  OPTIONS "JSON_BuildTests OFF"
-)
-```
-
-The `URI` argument must be the first argument to `CPMAddPackage`.
-`URI` automatically sets `EXCLUDE_FROM_ALL YES` and `SYSTEM YES`.
-If this is not desired, `EXCLUDE_FROM_ALL NO` and `SYSTEM NO` can be set afterwards.
-
 After calling `CPMAddPackage`, the following variables are defined in the local scope, where `<dependency>` is the name of the dependency.
 
 - `<dependency>_SOURCE_DIR` is the path to the source of the dependency.
@@ -425,8 +411,11 @@ CPMAddPackage("gh:jbeder/yaml-cpp#yaml-cpp-0.6.3@0.6.3")
 
 ```cmake
 CPMAddPackage(
-  URI "gh:nlohmann/json@3.9.1"
+  NAME nlohmann_json
-  OPTIONS "JSON_BuildTests OFF"
+  VERSION 3.9.1
+  GITHUB_REPOSITORY nlohmann/json
+  OPTIONS
+    "JSON_BuildTests OFF"
 )
 ```
 
@@ -456,7 +445,8 @@ For a working example of using CPM to download and configure the Boost C++ Libra
 ```cmake
 # the install option has to be explicitly set to allow installation
 CPMAddPackage(
-  URI "gh:jarro2783/cxxopts@2.2.1"
+  GITHUB_REPOSITORY jarro2783/cxxopts
+  VERSION 2.2.1
   OPTIONS "CXXOPTS_BUILD_EXAMPLES NO" "CXXOPTS_BUILD_TESTS NO" "CXXOPTS_ENABLE_INSTALL YES"
 )
 ```
@@ -465,7 +455,9 @@ CPMAddPackage(
 
 ```cmake
 CPMAddPackage(
-  URI "gh:google/benchmark@1.5.2"
+  NAME benchmark
+  GITHUB_REPOSITORY google/benchmark
+  VERSION 1.5.2
   OPTIONS "BENCHMARK_ENABLE_TESTING Off"
 )
 

cmake/CPM.cmake

@@ -42,11 +42,7 @@ if(NOT COMMAND cpm_message)
   endfunction()
 endif()
 
-if(DEFINED EXTRACTED_CPM_VERSION)
-  set(CURRENT_CPM_VERSION "${EXTRACTED_CPM_VERSION}${CPM_DEVELOPMENT}")
-else()
 set(CURRENT_CPM_VERSION 1.0.0-development-version)
-endif()
 
 get_filename_component(CPM_CURRENT_DIRECTORY "${CMAKE_CURRENT_LIST_DIR}" REALPATH)
 if(CPM_DIRECTORY)
@@ -202,60 +198,6 @@ function(cpm_package_name_from_git_uri URI RESULT)
   endif()
 endfunction()
 
-# Find the shortest hash that can be used eg, if origin_hash is
-# cccb77ae9609d2768ed80dd42cec54f77b1f1455 the following files will be checked, until one is found
-# that is either empty (allowing us to assign origin_hash), or whose contents matches ${origin_hash}
-#
-# * .../cccb.hash
-# * .../cccb77ae.hash
-# * .../cccb77ae9609.hash
-# * .../cccb77ae9609d276.hash
-# * etc
-#
-# We will be able to use a shorter path with very high probability, but in the (rare) event that the
-# first couple characters collide, we will check longer and longer substrings.
-function(cpm_get_shortest_hash source_cache_dir origin_hash short_hash_output_var)
-  # for compatibility with caches populated by a previous version of CPM, check if a directory using
-  # the full hash already exists
-  if(EXISTS "${source_cache_dir}/${origin_hash}")
-    set(${short_hash_output_var}
-        "${origin_hash}"
-        PARENT_SCOPE
-    )
-    return()
-  endif()
-
-  foreach(len RANGE 4 40 4)
-    string(SUBSTRING "${origin_hash}" 0 ${len} short_hash)
-    set(hash_lock ${source_cache_dir}/${short_hash}.lock)
-    set(hash_fp ${source_cache_dir}/${short_hash}.hash)
-    # Take a lock, so we don't have a race condition with another instance of cmake. We will release
-    # this lock when we can, however, if there is an error, we want to ensure it gets released on
-    # it's own on exit from the function.
-    file(LOCK ${hash_lock} GUARD FUNCTION)
-
-    # Load the contents of .../${short_hash}.hash
-    file(TOUCH ${hash_fp})
-    file(READ ${hash_fp} hash_fp_contents)
-
-    if(hash_fp_contents STREQUAL "")
-      # Write the origin hash
-      file(WRITE ${hash_fp} ${origin_hash})
-      file(LOCK ${hash_lock} RELEASE)
-      break()
-    elseif(hash_fp_contents STREQUAL origin_hash)
-      file(LOCK ${hash_lock} RELEASE)
-      break()
-    else()
-      file(LOCK ${hash_lock} RELEASE)
-    endif()
-  endforeach()
-  set(${short_hash_output_var}
-      "${short_hash}"
-      PARENT_SCOPE
-  )
-endfunction()
-
 # Try to infer package name and version from a url
 function(cpm_package_name_and_ver_from_url url outName outVer)
   if(url MATCHES "[/\\?]([a-zA-Z0-9_\\.-]+)\\.(tar|tar\\.gz|tar\\.bz2|zip|ZIP)(\\?|/|$)")
@@ -335,10 +277,10 @@ function(cpm_create_module_file Name)
       # https://cmake.org/cmake/help/latest/module/FetchContent.html#fetchcontent-find-package-integration-examples
       string(TOLOWER ${Name} NameLower)
       file(WRITE ${CMAKE_FIND_PACKAGE_REDIRECTS_DIR}/${NameLower}-config.cmake
-           "include(\"\${CMAKE_CURRENT_LIST_DIR}/${NameLower}-extra.cmake\" OPTIONAL)\n"
+           "include(\"${CMAKE_CURRENT_LIST_DIR}/${NameLower}-extra.cmake\" OPTIONAL)\n"
-           "include(\"\${CMAKE_CURRENT_LIST_DIR}/${Name}Extra.cmake\" OPTIONAL)\n"
+           "include(\"${CMAKE_CURRENT_LIST_DIR}/${Name}Extra.cmake\" OPTIONAL)\n"
       )
-      file(WRITE ${CMAKE_FIND_PACKAGE_REDIRECTS_DIR}/${NameLower}-config-version.cmake
+      file(WRITE ${CMAKE_FIND_PACKAGE_REDIRECTS_DIR}/${NameLower}-version.cmake
            "set(PACKAGE_VERSION_COMPATIBLE TRUE)\n" "set(PACKAGE_VERSION_EXACT TRUE)\n"
       )
     else()
@@ -548,7 +490,7 @@ function(cpm_add_patches)
 
   # Find the patch program.
   find_program(PATCH_EXECUTABLE patch)
-  if(CMAKE_HOST_WIN32 AND NOT PATCH_EXECUTABLE)
+  if(WIN32 AND NOT PATCH_EXECUTABLE)
     # The Windows git executable is distributed with patch.exe. Find the path to the executable, if
     # it exists, then search `../usr/bin` and `../../usr/bin` for patch.exe.
     find_package(Git QUIET)
@@ -648,6 +590,14 @@ endfunction()
 function(CPMAddPackage)
   cpm_set_policies()
 
+  list(LENGTH ARGN argnLength)
+  if(argnLength EQUAL 1)
+    cpm_parse_add_package_single_arg("${ARGN}" ARGN)
+
+    # The shorthand syntax implies EXCLUDE_FROM_ALL and SYSTEM
+    set(ARGN "${ARGN};EXCLUDE_FROM_ALL;YES;SYSTEM;YES;")
+  endif()
+
   set(oneValueArgs
       NAME
       FORCE
@@ -670,26 +620,10 @@ function(CPMAddPackage)
 
   set(multiValueArgs URL OPTIONS DOWNLOAD_COMMAND PATCHES)
 
-  list(LENGTH ARGN argnLength)
-
-  # Parse single shorthand argument
-  if(argnLength EQUAL 1)
-    cpm_parse_add_package_single_arg("${ARGN}" ARGN)
-
-    # The shorthand syntax implies EXCLUDE_FROM_ALL and SYSTEM
-    set(ARGN "${ARGN};EXCLUDE_FROM_ALL;YES;SYSTEM;YES;")
-
-    # Parse URI shorthand argument
-  elseif(argnLength GREATER 1 AND "${ARGV0}" STREQUAL "URI")
-    list(REMOVE_AT ARGN 0 1) # remove "URI gh:<...>@version#tag"
-    cpm_parse_add_package_single_arg("${ARGV1}" ARGV0)
-
-    set(ARGN "${ARGV0};EXCLUDE_FROM_ALL;YES;SYSTEM;YES;${ARGN}")
-  endif()
-
   cmake_parse_arguments(CPM_ARGS "" "${oneValueArgs}" "${multiValueArgs}" "${ARGN}")
 
   # Set default values for arguments
+
   if(NOT DEFINED CPM_ARGS_VERSION)
     if(DEFINED CPM_ARGS_GIT_TAG)
       cpm_get_version_from_git_tag("${CPM_ARGS_GIT_TAG}" CPM_ARGS_VERSION)
@@ -860,19 +794,9 @@ function(CPMAddPackage)
       set(download_directory ${CPM_SOURCE_CACHE}/${lower_case_name}/${CPM_ARGS_CUSTOM_CACHE_KEY})
     elseif(CPM_USE_NAMED_CACHE_DIRECTORIES)
       string(SHA1 origin_hash "${origin_parameters};NEW_CACHE_STRUCTURE_TAG")
-      cpm_get_shortest_hash(
-        "${CPM_SOURCE_CACHE}/${lower_case_name}" # source cache directory
-        "${origin_hash}" # Input hash
-        origin_hash # Computed hash
-      )
       set(download_directory ${CPM_SOURCE_CACHE}/${lower_case_name}/${origin_hash}/${CPM_ARGS_NAME})
     else()
       string(SHA1 origin_hash "${origin_parameters}")
-      cpm_get_shortest_hash(
-        "${CPM_SOURCE_CACHE}/${lower_case_name}" # source cache directory
-        "${origin_hash}" # Input hash
-        origin_hash # Computed hash
-      )
       set(download_directory ${CPM_SOURCE_CACHE}/${lower_case_name}/${origin_hash})
     endif()
     # Expand `download_directory` relative path. This is important because EXISTS doesn't work for
@@ -939,9 +863,7 @@ function(CPMAddPackage)
     endif()
   endif()
 
-  if(NOT "${DOWNLOAD_ONLY}")
   cpm_create_module_file(${CPM_ARGS_NAME} "CPMAddPackage(\"${ARGN}\")")
-  endif()
 
   if(CPM_PACKAGE_LOCK_ENABLED)
     if((CPM_ARGS_VERSION AND NOT CPM_ARGS_SOURCE_DIR) OR CPM_INCLUDE_ALL_IN_PACKAGE_LOCK)
@@ -962,9 +884,8 @@ function(CPMAddPackage)
     # Calling FetchContent_MakeAvailable will then internally forward these options to
     # add_subdirectory. Up until these changes, we had to call FetchContent_Populate and
     # add_subdirectory separately, which is no longer necessary and has been deprecated as of 3.30.
-    # A Bug in CMake prevents us to use the non-deprecated functions until 3.30.3.
     set(fetchContentDeclareExtraArgs "")
-    if(${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.30.3")
+    if(${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.28.0")
       if(${CPM_ARGS_EXCLUDE_FROM_ALL})
         list(APPEND fetchContentDeclareExtraArgs EXCLUDE_FROM_ALL)
       endif()
@@ -990,7 +911,7 @@ function(CPMAddPackage)
     if(CPM_SOURCE_CACHE AND download_directory)
       file(LOCK ${download_directory}/../cmake.lock RELEASE)
     endif()
-    if(${populated} AND ${CMAKE_VERSION} VERSION_LESS "3.30.3")
+    if(${populated} AND ${CMAKE_VERSION} VERSION_LESS "3.28.0")
       cpm_add_subdirectory(
         "${CPM_ARGS_NAME}"
         "${DOWNLOAD_ONLY}"
@@ -1192,7 +1113,7 @@ function(cpm_fetch_package PACKAGE DOWNLOAD_ONLY populated)
   string(TOLOWER "${PACKAGE}" lower_case_name)
 
   if(NOT ${lower_case_name}_POPULATED)
-    if(${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.30.3")
+    if(${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.28.0")
       if(DOWNLOAD_ONLY)
         # MakeAvailable will call add_subdirectory internally which is not what we want when
         # DOWNLOAD_ONLY is set. Populate will only download the dependency without adding it to the

cmake/testing.cmake

@@ -79,16 +79,3 @@ function(ASSERT_NOT_EXISTS file)
     message(FATAL_ERROR "assertion failed: file ${file} exists")
   endif()
 endfunction()
-
-function(ASSERT_CONTENTS_EQUAL file content)
-  if(EXISTS ${file})
-    file(READ ${file} file_content)
-    if(content STREQUAL file_content)
-      message(STATUS "test passed: '${file}' exists and contains '${content}'")
-    else()
-      message(FATAL_ERROR "assertion failed: file '${file}' does not contain expected content.")
-    endif()
-  else()
-    message(FATAL_ERROR "assertion failed: file '${file} does not exist")
-  endif()
-endfunction()

examples/boost/CMakeLists.txt

@@ -13,12 +13,10 @@ include(../../cmake/CPM.cmake)
 
 CPMAddPackage(
   NAME Boost
-  VERSION 1.86.0 # Versions less than 1.85.0 may need patches for installation targets.
+  VERSION 1.84.0
-  URL https://github.com/boostorg/boost/releases/download/boost-1.86.0/boost-1.86.0-cmake.tar.xz
+  URL https://github.com/boostorg/boost/releases/download/boost-1.84.0/boost-1.84.0.tar.xz
-  URL_HASH SHA256=2c5ec5edcdff47ff55e27ed9560b0a0b94b07bd07ed9928b476150e16b0efc57
+  URL_HASH SHA256=2e64e5d79a738d0fa6fb546c6e5c2bd28f88d268a2a080546f74e5ff98f29d0e
-  OPTIONS "BOOST_ENABLE_CMAKE ON" "BOOST_SKIP_INSTALL_RULES ON" # Set `OFF` for installation
+  OPTIONS "BOOST_ENABLE_CMAKE ON" "BOOST_INCLUDE_LIBRARIES container\\\;asio" # Note the escapes!
-          "BUILD_SHARED_LIBS OFF" "BOOST_INCLUDE_LIBRARIES container\\\;asio" # Note the escapes!
 )
 
-# `Boost::headers` is also valid
 target_link_libraries(CPMExampleBoost PRIVATE Boost::asio Boost::container)

examples/sol2/CMakeLists.txt

@@ -8,7 +8,7 @@ include(../../cmake/CPM.cmake)
 
 CPMAddPackage(
   NAME lua
-  GITHUB_REPOSITORY lua/lua
+  GIT_REPOSITORY https://github.com/lua/lua.git
   VERSION 5.3.5
   DOWNLOAD_ONLY YES
 )
@@ -21,13 +21,7 @@ if(lua_ADDED)
   target_include_directories(lua SYSTEM PUBLIC $<BUILD_INTERFACE:${lua_SOURCE_DIR}>)
 endif()
 
-CPMAddPackage(
+CPMAddPackage("gh:ThePhD/sol2@3.3.0")
-  NAME sol2
-  GITHUB_REPOSITORY ThePhD/sol2
-  VERSION 3.3.0
-  # fix for clang 18.1.0, see https://github.com/ThePhD/sol2/issues/1581#issuecomment-2103463524
-  PATCHES fix_for_clang.patch
-)
 
 # ---- Executable ----
 

examples/sol2/fix_for_clang.patch

@@ -1,18 +0,0 @@
-diff -u a/include/sol/function_types_stateless.hpp b/include/types/function_types_stateless.hpp
---- a/include/sol/function_types_stateless.hpp
-+++ b/include/sol/function_types_stateless.hpp
-@@ -322,7 +322,13 @@ namespace sol { namespace function_detail {
- 		}
- 
- 		template <bool is_yielding, bool no_trampoline>
--		static int call(lua_State* L) noexcept(std::is_nothrow_copy_assignable_v<T>) {
-+		static int call(lua_State* L)
-+#if SOL_IS_ON(SOL_COMPILER_CLANG)
-+		// apparent regression in clang 18 - llvm/llvm-project#91362
-+#else
-+			noexcept(std::is_nothrow_copy_assignable_v<T>)
-+#endif
-+		{
- 			int nr;
- 			if constexpr (no_trampoline) {
- 				nr = real_call(L);

test/integration/test_shorthand_syntax.rb

@@ -1,86 +0,0 @@
-require_relative './lib'
-
-class TestShorthandSyntax < IntegrationTest
-
-  def get_project_binaries prj
-    exe_dir = File.join(prj.bin_dir, 'bin')
-    assert File.directory? exe_dir
-    return Dir[exe_dir + '/**/*'].filter {
-        # on multi-configuration generators (like Visual Studio) the executables will be in bin/<Config>
-        # also filter-out other artifacts like .pdb or .dsym
-        !File.directory?(_1) && File.stat(_1).executable?
-      }.map {
-        # remove .exe extension if any (there will be one on Windows)
-        File.basename(_1, '.exe')
-      }.sort
-  end
-
-  def test_create_with_commit_sha
-    prj = make_project from_template: 'using-adder'
-    prj.create_lists_from_default_template package:
-    'CPMAddPackage("gh:cpm-cmake/testpack-adder#cad1cd4b4cdf957c5b59e30bc9a1dd200dbfc716")'
-    assert_success prj.configure
-
-    cache = prj.read_cache
-    assert_equal 1, cache.packages.size
-    assert_equal '0', cache.packages['testpack-adder'].ver
-
-    assert_success prj.build
-    exes = get_project_binaries prj
-    # No adder projects were built as EXCLUDE_FROM_ALL is implicitly set
-    assert_equal ['using-adder'], exes
-  end
-
-  def test_create_with_version
-    prj = make_project from_template: 'using-adder'
-    prj.create_lists_from_default_template package:
-    'CPMAddPackage("gh:cpm-cmake/testpack-adder@1.0.0")'
-    assert_success prj.configure
-
-    cache = prj.read_cache
-    assert_equal 1, cache.packages.size
-    assert_equal '1.0.0', cache.packages['testpack-adder'].ver
-
-    assert_success prj.build
-    exes = get_project_binaries prj
-    assert_equal ['using-adder'], exes
-  end
-
-  def test_create_with_all
-    prj = make_project from_template: 'using-adder'
-    prj.create_lists_from_default_template package:
-    'CPMAddPackage(
-      URI "gh:cpm-cmake/testpack-adder@1.0.0"
-      EXCLUDE_FROM_ALL false
-    )'
-    assert_success prj.configure
-
-    cache = prj.read_cache
-    assert_equal cache.packages.size, 1
-    assert_equal cache.packages['testpack-adder'].ver, '1.0.0'
-    
-    assert_success prj.build
-    exes = get_project_binaries prj
-    assert_equal exes, ['simple', 'test-adding', 'using-adder']
-  end
-
-  def test_create_with_tests_but_without_examples
-    prj = make_project from_template: 'using-adder'
-    prj.create_lists_from_default_template package:
-    'CPMAddPackage(
-      URI "gh:cpm-cmake/testpack-adder@1.0.0"
-      OPTIONS "ADDER_BUILD_EXAMPLES OFF" "ADDER_BUILD_TESTS TRUE"
-      EXCLUDE_FROM_ALL false
-    )'
-    assert_success prj.configure
-
-    cache = prj.read_cache
-    assert_equal cache.packages.size, 1
-    assert_equal cache.packages['testpack-adder'].ver, '1.0.0'
-    
-    assert_success prj.build
-    exes = get_project_binaries prj
-    assert_equal exes, ['test-adding', 'using-adder']
-  end
-
-end

test/integration/test_source_cache.rb

@@ -75,17 +75,6 @@ class SourceCache < IntegrationTest
     assert_equal ver, package.ver
     expected_parent_dir = File.join(@cache_dir, name.downcase)
     assert package.src_dir.start_with?(expected_parent_dir), "#{package.src_dir} must be in #{expected_parent_dir}"
-
+    assert_equal dir_sha1, File.basename(package.src_dir)
-    # The hash has been shortened by cpm_get_shortest_hash. The following
-    # should hold:
-    # - The short hash should be a prefix of the input hash
-    # - There should be a file ".../${short_hash}.hash" which matches the full hash
-    short_hash = File.basename(package.src_dir)
-    assert dir_sha1.start_with?(short_hash), "short_hash should be a prefix of dir_sha1"
-
-    # Check that the full hash is stored in the .hash file
-    hash_file = "#{package.src_dir}.hash"
-    assert File.exist?(hash_file), "Hash file #{hash_file} should exist"
-    assert_equal dir_sha1, File.read(hash_file), "Hash file should contain the full original hash"
   end
 end

test/unit/get_shortest_hash.cmake

@@ -1,93 +0,0 @@
-cmake_minimum_required(VERSION 3.14 FATAL_ERROR)
-
-include(${CPM_PATH}/CPM.cmake)
-include(${CPM_PATH}/testing.cmake)
-
-# Random suffix
-string(
-  RANDOM
-  LENGTH 6
-  ALPHABET "0123456789abcdef" tmpdir_suffix
-)
-
-# Seconds since epoch
-string(TIMESTAMP tmpdir_base "%s" UTC)
-
-set(tmp "${CMAKE_CURRENT_BINARY_DIR}/get_shortest_hash-${tmpdir_base}-${tmpdir_suffix}")
-
-if(IS_DIRECTORY ${tmp})
-  message(FATAL_ERROR "Test directory ${tmp} already exists")
-endif()
-
-file(MAKE_DIRECTORY "${tmp}")
-
-# 1. Sanity check: none of these directories should exist yet
-
-assert_not_exists(${tmp}/cccb.hash)
-assert_not_exists(${tmp}/cccb77ae.hash)
-assert_not_exists(${tmp}/cccb77ae9609.hash)
-assert_not_exists(${tmp}/cccb77ae9608.hash)
-assert_not_exists(${tmp}/cccb77be.hash)
-
-# 1. The directory is empty, so it should get a 4-character hash
-cpm_get_shortest_hash(${tmp} "cccb77ae9609d2768ed80dd42cec54f77b1f1455" hash)
-assert_equal(${hash} "cccb")
-assert_contents_equal(${tmp}/cccb.hash cccb77ae9609d2768ed80dd42cec54f77b1f1455)
-
-# 1. Calling the function with a new hash that differs subtly should result in more characters being
-#   used, enough to uniquely identify the hash
-
-cpm_get_shortest_hash(${tmp} "cccb77ae9609d2768ed80dd42cec54f77b1f1456" hash)
-assert_equal(${hash} "cccb77ae")
-assert_contents_equal(${tmp}/cccb77ae.hash cccb77ae9609d2768ed80dd42cec54f77b1f1456)
-
-cpm_get_shortest_hash(${tmp} "cccb77ae9609d2768ed80dd42cec54f77b1f1457" hash)
-assert_equal(${hash} "cccb77ae9609")
-assert_contents_equal(${tmp}/cccb77ae9609.hash cccb77ae9609d2768ed80dd42cec54f77b1f1457)
-
-cpm_get_shortest_hash(${tmp} "cccb77ae9608d2768ed80dd42cec54f77b1f1455" hash)
-assert_equal(${hash} "cccb77ae9608")
-assert_contents_equal(${tmp}/cccb77ae9608.hash cccb77ae9608d2768ed80dd42cec54f77b1f1455)
-
-cpm_get_shortest_hash(${tmp} "cccb77be9609d2768ed80dd42cec54f77b1f1456" hash)
-assert_equal(${hash} "cccb77be")
-assert_contents_equal(${tmp}/cccb77be.hash cccb77be9609d2768ed80dd42cec54f77b1f1456)
-
-# check that legacy hashs are recognized
-file(MAKE_DIRECTORY "${tmp}/cccb77be9609d2768ed80dd42cec54f77b1f1457")
-cpm_get_shortest_hash(${tmp} "cccb77be9609d2768ed80dd42cec54f77b1f1457" hash)
-assert_equal(${hash} "cccb77be9609d2768ed80dd42cec54f77b1f1457")
-
-# 1. The old file should still exist, and have the same content
-assert_contents_equal(${tmp}/cccb.hash cccb77ae9609d2768ed80dd42cec54f77b1f1455)
-assert_contents_equal(${tmp}/cccb77ae.hash cccb77ae9609d2768ed80dd42cec54f77b1f1456)
-assert_contents_equal(${tmp}/cccb77ae9609.hash cccb77ae9609d2768ed80dd42cec54f77b1f1457)
-assert_contents_equal(${tmp}/cccb77ae9608.hash cccb77ae9608d2768ed80dd42cec54f77b1f1455)
-assert_contents_equal(${tmp}/cccb77be.hash cccb77be9609d2768ed80dd42cec54f77b1f1456)
-
-# 1. Confirm idempotence: calling any of these function should produce the same hash as before (hash
-#   lookups work correctly once the .hash files are created)
-
-cpm_get_shortest_hash(${tmp} "cccb77ae9609d2768ed80dd42cec54f77b1f1455" hash)
-assert_equal(${hash} "cccb")
-assert_contents_equal(${tmp}/cccb.hash cccb77ae9609d2768ed80dd42cec54f77b1f1455)
-
-cpm_get_shortest_hash(${tmp} "cccb77ae9609d2768ed80dd42cec54f77b1f1456" hash)
-assert_equal(${hash} "cccb77ae")
-assert_contents_equal(${tmp}/cccb77ae.hash cccb77ae9609d2768ed80dd42cec54f77b1f1456)
-
-cpm_get_shortest_hash(${tmp} "cccb77ae9609d2768ed80dd42cec54f77b1f1457" hash)
-assert_equal(${hash} "cccb77ae9609")
-assert_contents_equal(${tmp}/cccb77ae9609.hash cccb77ae9609d2768ed80dd42cec54f77b1f1457)
-
-cpm_get_shortest_hash(${tmp} "cccb77ae9608d2768ed80dd42cec54f77b1f1455" hash)
-assert_equal(${hash} "cccb77ae9608")
-assert_contents_equal(${tmp}/cccb77ae9608.hash cccb77ae9608d2768ed80dd42cec54f77b1f1455)
-
-cpm_get_shortest_hash(${tmp} "cccb77be9609d2768ed80dd42cec54f77b1f1456" hash)
-assert_equal(${hash} "cccb77be")
-assert_contents_equal(${tmp}/cccb77be.hash cccb77be9609d2768ed80dd42cec54f77b1f1456)
-
-# 1. Cleanup - remove the temporary directory that we created
-
-file(REMOVE_RECURSE ${tmp})