Implement #624: Use shorter hashes with CPM_SOURCE_CACHE (#631)
* Add ASSERT_CONTENTS_EQUAL test macro in testing.cmake
Checks if the contents of a file matches the given input
* Use shorter hashes with CPM_SOURCE_CACHE (#624)
Uses shorter hashes with CPM_SOURCE_CACHE. Falls back to a longer hash
if necessary (ie, if there's a collision with an existing hash).
See: #624
* Update integration tests to support shorter hashes
* trigger ci
* run cmake-format
* if already available, use the legacy cache hash
* create temporary file in current binary dir
* add test case for legacy hash
---------
Co-authored-by: Lars Melchior <lars.melchior@gmail.com>
Co-authored-by: Lars Melchior <TheLartians@users.noreply.github.com>

feature: allow URI to use shorthand syntax with additional options (#617
)
* feature: add URI to use shorthand syntax with additional options
This allows to combine the shorthand syntax with URI and additional arguments:
```
CPMAddPackage(URI "gh:nlohmann/json@3.9.1" OPTIONS "JSON_BUildTests OFF")
```
This is much shorter than the longer syntax way of writing:
```
CPMAddPackage(
  NAME nlohmann_json
  VERSION 3.9.1
  GITHUB_REPOSITORY nlohmann/json
  OPTIONS
    "JSON_BuildTests OFF"
)
```
* fix: use shorthand syntax in examples
* test: add test for shorthand syntax with options
* doc: extend README mentioning shorthand syntax with options
* feat: URI keyword also sets EXCLUDE_FROM AND SYSTEM
* doc: more explicit about the behavior of URI
* doc: adjust README accordingly to PR-Review
* test: fix inline documentation of test_simple
* move URI comment
* added new test for shorthand syntax
* reset simple test
* add that URI must be the first argument
---------
Co-authored-by: Lars Melchior <lars.melchior@gmail.com>

fix: do not generate module files with DOWNLOAD_ONLY (#654)
Co-authored-by: Avus <48911667+Avus@users.noreply.github.com>

Fetch content (#593)
* Add git_archival mechanism
* fetch_content
* Delete .pre-commit-config.yaml
* Update CPM.cmake
* cmake-format

Fix version filename for find_package redirects (#630)
Co-authored-by: Lars Melchior <TheLartians@users.noreply.github.com>

Fix finding patch executable when cross-compiling on windows. (#627)
`WIN32` checks whether current build context is windows. This is not correct in case of cross-compiling, because we are interested in finding host's tools, not SDK's tools.

circumvent bug in cmake <3.30.3 (#605)
Co-authored-by: Avus <48911667+Avus@users.noreply.github.com>

Add find_package overrides that also work in CONFIG mode (#498) (#604)

Additional search path for patch.exe (#581)
* Additional search path for patch.exe
* Style

replace deprecated calls to FetchContent_Populate (#570)
* replace deprecated calls to FetchContent_Populate
The single argument signature for FetchContent_Populate is deprecated with CMake 3.30.
It was used, in order to call add_subdirectory manually with the EXCLUDE_FROM_ALL and SYSTEM flags.
These have been added to FetchContent_Declare with 3.25 and 3.28.
Calling FetchContent_MakeAvailable will internally call add_subdirectory with EXCLUDE_FROM_ALL and SYSTEM.
There is therefore no need to call this manually.
* fix: OPTIONS passed to CPMAddPackage not set
where previously parsed in cpm_add_subdirectory which is not called
on the new code path.
* refactor: remove an unnecessary else branch
* ci: include cmake 3.30 in test matrix
* fix: forward SOURCE_SUBDIR to FetchContent_Declare
For CMake version <3.28 this is done by calling add_subdirectory manually.
For newer version FetchContent_Declare/MakeAvailable handles this for us.
* fix: only set options if download_only is false
this replicates the old behaviour
* fix: DOWNLOAD_ONLY test
* refactor: always use *_Populate to reduce code paths
* Revert "refactor: always use *_Populate to reduce code paths"
This reverts commit 0e8ca2a.
---------
Co-authored-by: Avus <48911667+Avus@users.noreply.github.com>