install.from.url: install.from.url
In RLogik/rbettersyntax: Simpler Syntax for R

Description Usage Arguments Examples

View source: R/packages.r

Allow for simpler syntax in R. Loads packages from URL, potentially unzipping if necessary. By contrast to installr, the URLs with parameters do not lead to problems.

1	install.from.url(pkg.name='...', url='...', file.type='...', install=TRUE/FALSE, require.pkg=TRUE/FALSE, force=TRUE/FALSE)

`pkg.name`	a character string. Optional. Name of Package, if known. Otherwise, the proceedure extracts this from the downloaded file.
`url`	a character string. A url.
`file.type`	character. Default `NULL`. If not set, then system will attempt to determin whether the file is to be extracted and by what method. If set to `'zip'`, `'gz'`, `'7z'`, etc., then an appropriate method will be applied to unpack the downloaded object.
`install`	boolean. Default `TRUE`. If set to `TRUE`, then the package in the downloaded object will be installed, otherwise the path of the downloaded package will be returned.
`require.pkg`	boolean. Default `FALSE`. If `require.pkg=TRUE` and `force=FALSE` and `pkg.name` is defined, `require(pkg.name)` will be called at the start. If it succeeds, no installation will take place. If `require.pkg=TRUE`, then `require(···)` will be called at the end.
`force`	boolean. Defaut `FALSE`. If set to `FALSE`, determines, whether `library(···)` / `require(···)` will be attempted first before installation.

## Not run: 
install.from.url(url='http://domain.de/mypackage.zip?parameters=areok', file.type='zip');
install.from.url(url='http://domain.de/mypackage.gz?parameters=areok', file.type='gz');
install.from.url(url='http://domain.de/mypackage.gz?parameters=areok'); ## file type will be automatically detected
install.from.url(url='http://domain.de/mypackage?parameters=areok');
path <- install.from.url(url='http://domain.de/mypackage?parameters=areok', install=FALSE);
install.packages(pkgs=path, repos=NULL, type='source');
path <- install.from.url(url='http://domain.de/mypackage?parameters=areok', install=FALSE, pkg.name='mypackage', require.pkg=TRUE); ## tries require('mypackage') first, otherwise installs package afresh.
path <- install.from.url(url='http://domain.de/mypackage?parameters=areok', install=FALSE, require.pkg=TRUE, force=TRUE); ## forces a fresh installation of the package followed by a require(···) command (package name will be automatically detected).

## End(Not run)