Mention DATADEPS_ALWAYS_ACCEPT in README

README.md

@@ -5,63 +5,51 @@
 [![Coverage](https://coveralls.io/repos/github/devmotion/PalmerPenguins.jl/badge.svg?branch=main)](https://coveralls.io/github/devmotion/PalmerPenguins.jl?branch=main)
 [![Code Style: Blue](https://img.shields.io/badge/code%20style-blue-4495d1.svg)](https://github.com/invenia/BlueStyle)
 
-Load the [Palmer penguins dataset](https://allisonhorst.github.io/palmerpenguins/), an
-alternative to the Iris dataset, in Julia.
+Load the [Palmer penguins dataset](https://allisonhorst.github.io/palmerpenguins/), an alternative to the Iris dataset, in Julia.
 
 ## Overview
 
-The [Palmer penguins dataset](https://allisonhorst.github.io/palmerpenguins/) by Allison
-Horst, Alison Hill, and Kristen Gorman is a dataset for data exploration & visualization,
-as an alternative to the Iris dataset.
+The [Palmer penguins dataset](https://allisonhorst.github.io/palmerpenguins/) by Allison Horst, Alison Hill, and Kristen Gorman is a dataset for data exploration & visualization, as an alternative to the Iris dataset.
 
-The dataset contains data for 344 penguins. There are 3 different species of penguins in
-this dataset, collected from 3 islands in the Palmer Archipelago, Antarctica.
+The dataset contains data for 344 penguins.
+There are 3 different species of penguins in this dataset, collected from 3 islands in the Palmer Archipelago, Antarctica.
 
-Data were collected and made available by
-[Dr. Kristen Gorman](https://www.uaf.edu/cfos/people/faculty/detail/kristen-gorman.php)
-and the [Palmer Station, Antarctica LTER](https://pal.lternet.edu/), a member of the
-[Long Term Ecological Research Network](https://lternet.edu/).
+Data were collected and made available by [Dr. Kristen Gorman](https://www.uaf.edu/cfos/people/faculty/detail/kristen-gorman.php) and the [Palmer Station, Antarctica LTER](https://pal.lternet.edu/), a member of the [Long Term Ecological Research Network](https://lternet.edu/).
 
-Data are available by
-[CC-0](https://creativecommons.org/share-your-work/public-domain/cc0/) license in
-accordance with the [Palmer Station LTER Data Policy](http://pal.lternet.edu/data/policies)
-and the
-[LTER Data Access Policy for Type I data](https://lternet.edu/data-access-policy/).
+Data are available by [CC-0](https://creativecommons.org/share-your-work/public-domain/cc0/) license in accordance with the [Palmer Station LTER Data Policy](http://pal.lternet.edu/data/policies) and the [LTER Data Access Policy for Type I data](https://lternet.edu/data-access-policy/).
 
-More information about the dataset is available in
-[its official documentation](https://allisonhorst.github.io/palmerpenguins/).
+More information about the dataset is available in [its official documentation](https://allisonhorst.github.io/palmerpenguins/).
 
 ## Usage
 
 The simplified version of the raw data can be loaded by
+
 ```julia
 julia> using PalmerPenguins
 
 julia> table = PalmerPenguins.load()
 ```
-This will download the data (both the simplified and the raw version) once using
-[DataDeps.jl](https://github.com/oxinabox/DataDeps.jl),
-displaying the information above and making it available for future use. The function
-`PalmerPenguins.load()` returns a
-[`CSV.File`](https://juliadata.github.io/CSV.jl/stable/#CSV.File) object that supports the
-[Tables.jl](https://github.com/JuliaData/Tables.jl) interface. For instance, it can be
-converted to a
-[`DataFrame`](https://juliadata.github.io/DataFrames.jl/stable/man/getting_started/#The-DataFrame-Type-1)
-by executing
+
+This will download the data (both the simplified and the raw version) once using [DataDeps.jl](https://github.com/oxinabox/DataDeps.jl), displaying the information above and making it available for future use.
+
+The prompt and the confirmation before downloading the data for the first time can be bypassed by setting the [`DATADEPS_ALWAYS_ACCEPT` environment variable](https://www.oxinabox.net/DataDeps.jl/stable/z10-for-end-users/#Configuration-1).
+In particular, this is required for [non-interactive use](https://github.com/devmotion/PalmerPenguins.jl/issues/9) such as in continuous integration tests.
+
+The function `PalmerPenguins.load()` returns a [`CSV.File`](https://juliadata.github.io/CSV.jl/stable/#CSV.File) object that supports the [Tables.jl](https://github.com/JuliaData/Tables.jl) interface.
+For instance, it can be converted to a [`DataFrame`](https://juliadata.github.io/DataFrames.jl/stable/man/getting_started/#The-DataFrame-Type-1) by executing
+
 ```julia
 julia> using DataFrames
 
 julia> df = DataFrame(table)
 ```
-
 The raw data can be loaded with
 ```julia
 julia> tableraw = PalmerPenguins.load(; raw = true)
 ```
+
 If `raw = false` (the default), then the simplified version is returned.
 
 ## References
 
-Gorman KB, Williams TD, Fraser WR (2014) Ecological Sexual Dimorphism and Environmental
-Variability within a Community of Antarctic Penguins (Genus Pygoscelis). PLoS ONE 9(3):
-e90081. https://doi.org/10.1371/journal.pone.0090081
+Gorman KB, Williams TD, Fraser WR (2014) Ecological Sexual Dimorphism and Environmental Variability within a Community of Antarctic Penguins (Genus Pygoscelis). PLoS ONE 9(3): e90081. https://doi.org/10.1371/journal.pone.0090081