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Support org-prefixed package names in find_package #682

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b60aa1c
Support org-prefixed package names in find_package
sean-parent Nov 20, 2025
4449e20
typo.
sean-parent Nov 20, 2025
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2 changes: 2 additions & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -134,6 +134,8 @@ After calling `CPMAddPackage`, the following variables are defined in the local

For using CPM.cmake projects with external package managers, such as conan or vcpkg, setting the variable [`CPM_USE_LOCAL_PACKAGES`](#options) will make CPM.cmake try to add a package through `find_package` first, and add it from source if it doesn't succeed.

When using `find_package`, CPM will automatically try to locate installed packages using organization-prefixed names. For example, a package specified as `gh:org/library` will first be searched as `library`, and if not found, will be searched as `org-library`. This allows installed packages to be found using their organization-qualified names to avoid naming conflicts.

In rare cases, this behaviour may be desirable by default. The function `CPMFindPackage` will try to find a local dependency via CMake's `find_package` and fallback to `CPMAddPackage`, if the dependency is not found.

## Updating CPM
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12 changes: 12 additions & 0 deletions cmake/CPM.cmake
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Expand Up @@ -197,6 +197,10 @@ function(cpm_package_name_from_git_uri URI RESULT)
${CMAKE_MATCH_1}
PARENT_SCOPE
)
# Also export org-prefixed variant if org can be extracted
if("${URI}" MATCHES "[/:]([^/:]+)/([^/:]+)(/?.git/?)?$")
set(${RESULT}_WITH_ORG "${CMAKE_MATCH_1}-${CMAKE_MATCH_2}" PARENT_SCOPE)
endif()
else()
unset(${RESULT} PARENT_SCOPE)
endif()
Expand Down Expand Up @@ -305,6 +309,14 @@ endfunction()
function(cpm_find_package NAME VERSION)
string(REPLACE " " ";" EXTRA_ARGS "${ARGN}")
find_package(${NAME} ${VERSION} ${EXTRA_ARGS} QUIET)

if(NOT ${CPM_ARGS_NAME}_FOUND AND DEFINED ${CPM_ARGS_NAME}_WITH_ORG)
find_package(${${CPM_ARGS_NAME}_WITH_ORG} ${CPM_ARGS_VERSION} QUIET ${CPM_ARGS_FIND_PACKAGE_ARGUMENTS})
if(${${CPM_ARGS_NAME}_WITH_ORG}_FOUND)
set(${CPM_ARGS_NAME}_FOUND TRUE)
endif()
endif()

if(${CPM_ARGS_NAME}_FOUND)
if(DEFINED ${CPM_ARGS_NAME}_VERSION)
set(VERSION ${${CPM_ARGS_NAME}_VERSION})
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