install_github: Install R package from GitHub
In cloudyr/ghit: Lightweight GitHub Package Installer

Description Usage Arguments Value Author(s) Examples

install_github allows users to install R packages hosted on GitHub without needing to install or load the heavy dependencies required by devtools. ghit provides a drop-in replacement that provides (almost) identical functionality to devtools::install_github().

install_github(repo, host = "github.com", credentials = NULL,
  build_args = NULL, build_vignettes = TRUE, uninstall = FALSE,
  verbose = FALSE, repos = NULL, type = "source", dependencies = NA,
  ...)

`repo`	A character vector naming one or more GitHub repository containing an R package to install (e.g., “leeper/ghit”), or optionally a branch (“leeper/ghit[dev]”), a reference (“leeper/ghit@b200fb1bd”), tag (“leeper/ghit@v0.2”), or subdirectory (“leeper/ghit/R”). These arguments can be placed in any order and in any combination (e.g., “leeper/ghit[master]@abc123/R”).
`host`	A character string naming a host, to enable installation of enterprise-hosted GitHub packages.
`build_args`	A character string used to control the package build, passed to `R CMD build`.
`build_vignettes`	A logical specifying whether to build package vignettes, passed to `R CMD build`. Can be slow. Note: The default is `TRUE`, unlike in `devtools::install_github()`.
`uninstall`	A logical specifying whether to uninstall previous installations using `remove.packages` before attempting install. This is useful for installing an older version of a package than the one currently installed.
`verbose`	A logical specifying whether to print details of package building and installation.
`repos`	A character vector specifying one or more URLs for CRAN-like repositories from which package dependencies might be installed. By default, value is taken from `options("repos")` or set to the CRAN cloud repository.
`type`	A character vector passed to the `type` argument of `install.packages`.
`dependencies`	A character vector specifying which dependencies to install (of “Depends”, “Imports”, “Suggests”, etc.). The default, `NA`, means `c("Depends", "Imports", "LinkingTo")`. See `install.packages` for a fuller explanation.
`...`	Additional arguments to control installation of package, passed to `install.packages`.
`credentials`	An

argument passed to the credentials argument to clone. See cred_user_pass or cred_ssh_key.

A named character vector of R package versions installed.

Thomas J. Leeper

## Not run: 
tmp <- file.path(tempdir(), "tmplib")
dir.create(tmp)
# install a single package
install_github("cloudyr/ghit", lib = tmp)

# install multiple packages
install_github(c("cloudyr/ghit", "leeper/crandatapkgs"), lib = tmp)

# cleanup
unlink(tmp, recursive = TRUE)

## End(Not run)