vcpkg/docs/maintainers/vcpkg_from_git.md
2018-11-06 15:47:02 -08:00

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# vcpkg_from_git
Download and extract a project from git
## Usage:
```cmake
vcpkg_from_git(
OUT_SOURCE_PATH <SOURCE_PATH>
URL <https://android.googlesource.com/platform/external/fdlibm>
REF <59f7335e4d...>
SHA512 <abcdef123...>
[PATCHES <patch1.patch> <patch2.patch>...]
)
```
## Parameters:
### OUT_SOURCE_PATH
Specifies the out-variable that will contain the extracted location.
This should be set to `SOURCE_PATH` by convention.
### URL
The url of the git repository.
### SHA512
The SHA512 hash that should match the archive form of the commit.
This is most easily determined by first setting it to `0`, then trying to build the port. The error message will contain the full hash, which can be copied back into the portfile.
### REF
A stable git commit-ish (ideally a tag or commit) that will not change contents. **This should not be a branch.**
For repositories without official releases, this can be set to the full commit id of the current latest master.
### PATCHES
A list of patches to be applied to the extracted sources.
Relative paths are based on the port directory.
## Notes:
`OUT_SOURCE_PATH`, `REF`, `SHA512`, and `URL` must be specified.
## Examples:
* [fdlibm](https://github.com/Microsoft/vcpkg/blob/master/ports/fdlibm/portfile.cmake)
## Source
[scripts/cmake/vcpkg_from_git.cmake](https://github.com/Microsoft/vcpkg/blob/master/scripts/cmake/vcpkg_from_git.cmake)