vcpkg/docs/users/config-environment.md
Alexander Neumann 0c1c43742d
[vcpkg] add env var VCPKG_OVERLAY_TRIPLETS (#12790)
* [vcpkg] add env var VCPKG_OVERLAY_TRIPLETS

* shorten way to complicated doc

* run clang format

* Apply CR

Co-authored-by: ras0219 <533828+ras0219@users.noreply.github.com>

* Apply CR2

Co-authored-by: nicole mazzuca <mazzucan@outlook.com>

Co-authored-by: ras0219 <533828+ras0219@users.noreply.github.com>
Co-authored-by: nicole mazzuca <mazzucan@outlook.com>
Co-authored-by: Billy Robert O'Neal III <bion@microsoft.com>
Co-authored-by: Robert Schumacher <roschuma@microsoft.com>
2020-09-28 07:51:16 -07:00

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Markdown

## Environment and Configuration
### Environment Variables
#### VCPKG_DOWNLOADS
This environment variable can be set to an existing directory to use for storing downloads instead of the internal
`downloads/` directory. It should always be set to an absolute path.
#### VCPKG_FEATURE_FLAGS
This environment variable can be set to a comma-separated list of off-by-default features in vcpkg. These features are
subject to change without notice and should be considered highly unstable.
Non-exhaustive list of off-by-default features:
- `binarycaching`
- `manifest`
#### EDITOR
This environment variable can be set to the full path of an executable to be used for `vcpkg edit`. Please see
`vcpkg help edit` for command-specific help.
#### VCPKG_ROOT
This environment variable can be set to a directory to use as the root of the vcpkg instance. Note that mixing vcpkg
repo versions and executable versions can cause issues.
#### VCPKG_VISUAL_STUDIO_PATH
This environment variable can be set to the full path to a Visual Studio instance on the machine. This Visual Studio instance
will be used if the triplet does not override it via the [`VCPKG_VISUAL_STUDIO_PATH` triplet setting](triplets.md#VCPKG_VISUAL_STUDIO_PATH).
Example: `D:\2017`
#### VCPKG_DEFAULT_TRIPLET
This environment variable can be set to a triplet name which will be used for unqualified triplet references in command lines.
#### VCPKG_OVERLAY_PORTS
This environment variable allows users to override ports with alternate versions according to the
[ports overlay](../specifications/ports-overlay.md) specification. List paths to overlays using
the platform dependent PATH seperator (Windows `;` | others `:`)
Example (Windows): `C:\custom-ports\boost;C:\custom-ports\sqlite3`
#### VCPKG_OVERLAY_TRIPLETS
This environment variable allows users to add directories to search for triplets.
[Example: overlay triplets](../examples/overlay-triplets-linux-dynamic.md).
List paths to overlays using the platform dependent PATH seperator (Windows `;`, others `:`)
#### VCPKG_FORCE_SYSTEM_BINARIES
This environment variable, if set, suppresses the downloading of CMake and Ninja and forces the use of the system binaries.
#### VCPKG_KEEP_ENV_VARS
This environment variable can be set to a list of environment variables, separated by `;`, which will be propagated to
the build environment.
Example: `FOO_SDK_DIR;BAR_SDK_DIR`