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https://github.com/brodieg/vetr

Trust, but Verify
https://github.com/brodieg/vetr

argument-checks input-validation r

Last synced: 11 days ago
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Trust, but Verify

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README 

        

```{r, echo = FALSE}

knitr::opts_chunk$set(

  collapse = TRUE,

  comment = "##",

  fig.path = "README-",

  error = TRUE

)

library(vetr)

```



# vetr



[![R build status](https://github.com/brodieG/vetr/workflows/R-CMD-check/badge.svg)](https://github.com/brodieG/vetr/actions)

[![](https://codecov.io/github/brodieG/vetr/coverage.svg?branch=master)](https://app.codecov.io/gh/brodieG/vetr?branch=master)

[![](http://www.r-pkg.org/badges/version/vetr)](https://cran.r-project.org/package=vetr)

[![Project Status: WIP - Initial development is in progress, but there has not yet been a stable, usable release suitable for the public.](https://www.repostatus.org/badges/latest/wip.svg)](https://www.repostatus.org/#wip)

[![Dependencies direct/recursive](https://tinyverse.netlify.app/badge/vetr)]( https://tinyverse.netlify.app/)



```{r child='vignettes/rmdhunks/trust-but-verify.Rmd'}

```



```{r child='vignettes/rmdhunks/declarative-checks.Rmd'}

```



## Vetting Expressions



```{r child='vignettes/rmdhunks/vetting-expressions.Rmd'}

```



## `vetr` in Functions



If you are vetting function inputs, you can use the `vetr` function, which works

just like `vet` except that it is streamlined for use within functions:



```{r}

fun <- function(x, y) {

  vetr(numeric(1L), logical(1L))

  TRUE   # do work...

}

fun(1:2, "foo")

fun(1, "foo")

```



`vetr` automatically matches the vetting expressions to the corresponding

arguments and fetches the argument values from the function environment.



See [vignette][4] for additional details on how the `vetr` function works.



## Additional Documentation



* [`vetr` vignette][1], `?vet`, `?vetr`, `example(vet)`, `example(vetr)`.

* [`alike` vignette][2], `?alike`, and `example(alike)` for discussion of

  templates.

* A survey of [parameter validation functions][5].



## Development Status



`vetr` is still in development, although most of the features are considered

mature.  The most likely area of change is the treatment of function and

language templates (e.g.  `alike(sum, max)`), and more flexible treatment of

list templates (e.g. in future lists may be allowed to be different lengths so

long as every named element in the template exists in the object).



## Installation



This package is available on CRAN:



```{r eval=FALSE}

install.packages('vetr')

```



It has no runtime dependencies.



For the development version use

`remotes::install_github('brodieg/vetr@development')` or:



```{r eval=FALSE}

f.dl <- tempfile()

f.uz <- tempfile()

github.url <- 'https://github.com/brodieG/vetr/archive/development.zip'

download.file(github.url, f.dl)

unzip(f.dl, exdir=f.uz)

install.packages(file.path(f.uz, 'vetr-development'), repos=NULL, type='source')

unlink(c(f.dl, f.uz))

```



The master branch typically mirrors CRAN and should be stable.



## Alternatives



There are many alternatives available to `vetr`.  We do a survey of the

following in our [parameter validation functions][5] review:



```{r child='vignettes/rmdhunks/related-packages.Rmd'}

```



## Acknowledgments



Thank you to:



* R Core for developing and maintaining such a wonderful language.

* CRAN maintainers, for patiently shepherding packages onto CRAN and maintaining

  the repository, and Uwe Ligges in particular for maintaining

  [Winbuilder](https://win-builder.r-project.org/).

* Users and others who have reported bugs and/or helped contribute fixes (see

  NEWS.md).

* Tomas Kalibera for [rchk](https://github.com/kalibera/rchk) and rcnst to help

  detect errors in compiled code, and in particular for his infinite patience in

  helping me resolve the issues he identified for me.

* [Jim Hester](https://github.com/jimhester) because

  [covr](https://cran.r-project.org/package=covr) rocks.

* [Dirk Eddelbuettel](https://github.com/eddelbuettel) and [Carl

  Boettiger](https://github.com/cboettig) for the

  [rocker](https://github.com/rocker-org/rocker) project, and [Gábor

  Csárdi](https://github.com/gaborcsardi) and the

  [R-consortium](https://www.r-consortium.org/) for

  [Rhub](https://github.com/r-hub), without which testing bugs on R-devel and

  other platforms would be a nightmare.

* [Winston Chang](https://github.com/wch) for the

  [r-debug](https://hub.docker.com/r/wch1/r-debug/) docker container, in

  particular because of the valgrind level 2 instrumented version of R.

* [Hadley Wickham](https://github.com/hadley/) and [Peter

  Danenberg](https://github.com/klutometis) for

  [roxygen2](https://cran.r-project.org/package=roxygen2).

* [Yihui Xie](https://github.com/yihui) for

  [knitr](https://cran.r-project.org/package=knitr) and  [J.J.

  Allaire](https://github.com/jjallaire) etal for

  [rmarkdown](https://cran.r-project.org/package=rmarkdown), and by extension

  John MacFarlane for [pandoc](https://pandoc.org/).

* [Michel Lang](https://github.com/mllg) for pushing me to implement `all_bw` to

  compete with his own package [`checkmate`](https://cran.r-project.org/package=checkmate).

* [Eugene Ha](https://github.com/egnha) for pointing me to several other

  relevant packages, which in turn led to the [survey of related packages][5].

* Stefan M. Bache for the idea of having a function for testing objects directly

  (originally `vetr` only worked with function arguments), which I took from

  ensurer.

* Olaf Mersmann for

  [microbenchmark](https://cran.r-project.org/package=microbenchmark), because

  microsecond matter, and [Joshua Ulrich](https://github.com/joshuaulrich) for

  making it lightweight.

* All open source developers out there that make their work freely available

  for others to use.

* [Github](https://github.com/), [Codecov](https://about.codecov.io/),

  [Vagrant](https://www.vagrantup.com/), [Docker](https://www.docker.com/),

  [Ubuntu](https://ubuntu.com/), [Brew](https://brew.sh/) for providing

  infrastructure that greatly simplifies open source development.

* [Free Software Foundation](https://www.fsf.org/) for developing the GPL

  license and promotion of the free software movement.



## About the Author



Brodie Gaslam is a hobbyist programmer based on the US East Coast.



[1]: https://cran.r-project.org/package=vetr/vignettes/vetr.html

[2]: https://cran.r-project.org/package=vetr/vignettes/alike.html

[3]: https://cran.r-project.org/package=vetr/vignettes/vetr.html#non-standard-evaluation

[4]: https://cran.r-project.org/package=vetr/vignettes/vetr.html#in-functions

[5]: http://htmlpreview.github.io/?https://github.com/brodieG/vetr/blob/master/extra/compare.html