diff --git a/.Rbuildignore b/.Rbuildignore
index 423d7a1..4a171f5 100644
--- a/.Rbuildignore
+++ b/.Rbuildignore
@@ -14,3 +14,4 @@
 ^cran-comments\.md$
 ^CRAN-RELEASE$
 ^\.httr-oauth$
+^codecov\.yml$
diff --git a/.github/.gitignore b/.github/.gitignore
new file mode 100644
index 0000000..2d19fc7
--- /dev/null
+++ b/.github/.gitignore
@@ -0,0 +1 @@
+*.html
diff --git a/.github/workflows/R-CMD-check.yaml b/.github/workflows/R-CMD-check.yaml
new file mode 100644
index 0000000..201c9a2
--- /dev/null
+++ b/.github/workflows/R-CMD-check.yaml
@@ -0,0 +1,95 @@
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+name: R-CMD-check
+
+jobs:
+  R-CMD-check:
+    runs-on: ${{ matrix.config.os }}
+
+    name: ${{ matrix.config.os }} (${{ matrix.config.r }})
+
+    strategy:
+      fail-fast: false
+      matrix:
+        config:
+          - {os: macOS-latest,   r: 'devel'}
+          - {os: macOS-latest,   r: 'release'}
+          - {os: windows-latest, r: 'release'}
+          - {os: ubuntu-16.04,   r: 'release', rspm: "https://packagemanager.rstudio.com/cran/__linux__/xenial/latest"}
+          - {os: ubuntu-16.04,   r: 'oldrel',  rspm: "https://packagemanager.rstudio.com/cran/__linux__/xenial/latest"}
+          - {os: ubuntu-16.04,   r: '3.5',     rspm: "https://packagemanager.rstudio.com/cran/__linux__/xenial/latest"}
+
+    env:
+      R_REMOTES_NO_ERRORS_FROM_WARNINGS: true
+      RSPM: ${{ matrix.config.rspm }}
+      GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - uses: r-lib/actions/setup-r@master
+        with:
+          r-version: ${{ matrix.config.r }}
+
+      - uses: r-lib/actions/setup-pandoc@master
+
+      - name: Query dependencies
+        run: |
+          install.packages('remotes')
+          saveRDS(remotes::dev_package_deps(dependencies = TRUE), ".github/depends.Rds", version = 2)
+          writeLines(sprintf("R-%i.%i", getRversion()$major, getRversion()$minor), ".github/R-version")
+        shell: Rscript {0}
+
+      - name: Cache R packages
+        if: runner.os != 'Windows'
+        uses: actions/cache@v1
+        with:
+          path: ${{ env.R_LIBS_USER }}
+          key: ${{ runner.os }}-${{ hashFiles('.github/R-version') }}-1-${{ hashFiles('.github/depends.Rds') }}
+          restore-keys: ${{ runner.os }}-${{ hashFiles('.github/R-version') }}-1-
+
+      - name: Install system dependencies
+        if: runner.os == 'Linux'
+        env:
+          RHUB_PLATFORM: linux-x86_64-ubuntu-gcc
+        run: |
+          Rscript -e "remotes::install_github('r-hub/sysreqs')"
+          sysreqs=$(Rscript -e "cat(sysreqs::sysreq_commands('DESCRIPTION'))")
+          sudo -s eval "$sysreqs"
+
+      - name: Install dependencies
+        run: |
+          remotes::install_deps(dependencies = TRUE)
+          remotes::install_cran("rcmdcheck")
+        shell: Rscript {0}
+
+      - name: Session info
+        run: |
+          options(width = 100)
+          pkgs <- installed.packages()[, "Package"]
+          sessioninfo::session_info(pkgs, include_base = TRUE)
+        shell: Rscript {0}
+
+      - name: Check
+        env:
+          _R_CHECK_CRAN_INCOMING_: false
+        run: rcmdcheck::rcmdcheck(args = c("--no-manual", "--as-cran"), error_on = "warning", check_dir = "check")
+        shell: Rscript {0}
+
+      - name: Show testthat output
+        if: always()
+        run: find check -name 'testthat.Rout*' -exec cat '{}' \; || true
+        shell: bash
+
+      - name: Upload check results
+        if: failure()
+        uses: actions/upload-artifact@master
+        with:
+          name: ${{ runner.os }}-r${{ matrix.config.r }}-results
+          path: check
diff --git a/.github/workflows/check_lintr.yaml b/.github/workflows/check_lintr.yaml
new file mode 100644
index 0000000..051dc71
--- /dev/null
+++ b/.github/workflows/check_lintr.yaml
@@ -0,0 +1,10 @@
+on: [push]
+
+name: check-linters
+
+jobs:
+  check_linters:
+    runs-on: ubuntu-latest
+    name: Check for linters in the code
+    steps:
+      - uses: inbo/actions/lint_pkg@master
diff --git a/.github/workflows/pkgdown.yaml b/.github/workflows/pkgdown.yaml
new file mode 100644
index 0000000..2bf64e2
--- /dev/null
+++ b/.github/workflows/pkgdown.yaml
@@ -0,0 +1,45 @@
+on:
+  push:
+    branches: master
+
+name: pkgdown
+
+jobs:
+  pkgdown:
+    runs-on: macOS-latest
+    env:
+      GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
+    steps:
+      - uses: actions/checkout@v2
+
+      - uses: r-lib/actions/setup-r@master
+
+      - uses: r-lib/actions/setup-pandoc@master
+
+      - name: Query dependencies
+        run: |
+          install.packages('remotes')
+          saveRDS(remotes::dev_package_deps(dependencies = TRUE), ".github/depends.Rds", version = 2)
+          writeLines(sprintf("R-%i.%i", getRversion()$major, getRversion()$minor), ".github/R-version")
+        shell: Rscript {0}
+
+      - name: Cache R packages
+        uses: actions/cache@v1
+        with:
+          path: ${{ env.R_LIBS_USER }}
+          key: ${{ runner.os }}-${{ hashFiles('.github/R-version') }}-1-${{ hashFiles('.github/depends.Rds') }}
+          restore-keys: ${{ runner.os }}-${{ hashFiles('.github/R-version') }}-1-
+
+      - name: Install dependencies
+        run: |
+          install.packages("remotes")
+          remotes::install_deps(dependencies = TRUE)
+          remotes::install_dev("pkgdown")
+        shell: Rscript {0}
+
+      - name: Install package
+        run: R CMD INSTALL .
+
+      - name: Deploy package
+        run: pkgdown::deploy_to_branch(new_process = FALSE)
+        shell: Rscript {0}
diff --git a/.github/workflows/pr-commands.yaml b/.github/workflows/pr-commands.yaml
new file mode 100644
index 0000000..0d3cb71
--- /dev/null
+++ b/.github/workflows/pr-commands.yaml
@@ -0,0 +1,51 @@
+on:
+  issue_comment:
+    types: [created]
+name: Commands
+jobs:
+  document:
+    if: startsWith(github.event.comment.body, '/document')
+    name: document
+    runs-on: macOS-latest
+    env:
+      GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
+    steps:
+      - uses: actions/checkout@v2
+      - uses: r-lib/actions/pr-fetch@master
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+      - uses: r-lib/actions/setup-r@master
+      - name: Install dependencies
+        run: Rscript -e 'install.packages(c("remotes", "roxygen2"))' -e 'remotes::install_deps(dependencies = TRUE)'
+      - name: Document
+        run: Rscript -e 'roxygen2::roxygenise()'
+      - name: commit
+        run: |
+          git add man/\* NAMESPACE
+          git commit -m 'Document'
+      - uses: r-lib/actions/pr-push@master
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+  style:
+    if: startsWith(github.event.comment.body, '/style')
+    name: style
+    runs-on: macOS-latest
+    env:
+      GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
+    steps:
+      - uses: actions/checkout@v2
+      - uses: r-lib/actions/pr-fetch@master
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+      - uses: r-lib/actions/setup-r@master
+      - name: Install dependencies
+        run: Rscript -e 'install.packages("styler")'
+      - name: Style
+        run: Rscript -e 'styler::style_pkg()'
+      - name: commit
+        run: |
+          git add \*.R
+          git commit -m 'Style'
+      - uses: r-lib/actions/pr-push@master
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/test-coverage.yaml b/.github/workflows/test-coverage.yaml
new file mode 100644
index 0000000..3058d03
--- /dev/null
+++ b/.github/workflows/test-coverage.yaml
@@ -0,0 +1,46 @@
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+name: test-coverage
+
+jobs:
+  test-coverage:
+    runs-on: macOS-latest
+    env:
+      GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
+    steps:
+      - uses: actions/checkout@v2
+
+      - uses: r-lib/actions/setup-r@master
+
+      - uses: r-lib/actions/setup-pandoc@master
+
+      - name: Query dependencies
+        run: |
+          install.packages('remotes')
+          saveRDS(remotes::dev_package_deps(dependencies = TRUE), ".github/depends.Rds", version = 2)
+          writeLines(sprintf("R-%i.%i", getRversion()$major, getRversion()$minor), ".github/R-version")
+        shell: Rscript {0}
+
+      - name: Cache R packages
+        uses: actions/cache@v1
+        with:
+          path: ${{ env.R_LIBS_USER }}
+          key: ${{ runner.os }}-${{ hashFiles('.github/R-version') }}-1-${{ hashFiles('.github/depends.Rds') }}
+          restore-keys: ${{ runner.os }}-${{ hashFiles('.github/R-version') }}-1-
+
+      - name: Install dependencies
+        run: |
+          install.packages(c("remotes"))
+          remotes::install_deps(dependencies = TRUE)
+          remotes::install_cran("covr")
+        shell: Rscript {0}
+
+      - name: Test coverage
+        run: covr::codecov()
+        shell: Rscript {0}
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 7284610..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,71 +0,0 @@
-# R for travis: see documentation at https://docs.travis-ci.com/user/languages/r
-# Default configuration for use with tic package
-# Usually you shouldn't need to change the first part of the file
-
-# DO NOT CHANGE THE CODE BELOW
-before_install: R -q -e 'install.packages(c("remotes", "curl")); remotes::install_github("ropenscilabs/tic"); tic::prepare_all_stages(); tic::before_install()'
-install: R -q -e 'tic::install()'
-after_install: R -q -e 'tic::after_install()'
-before_script: R -q -e 'tic::before_script()'
-script: R -q -e 'tic::script()'
-after_success: R -q -e 'tic::after_success()'
-after_failure: R -q -e 'tic::after_failure()'
-before_deploy: R -q -e 'tic::before_deploy()'
-deploy:
-  provider: script
-  script: R -q -e 'tic::deploy()'
-  on:
-    branch: master
-    dist: xenial
-    condition:
-      - $TRAVIS_PULL_REQUEST = false
-      - $TRAVIS_EVENT_TYPE != cron
-      - $TRAVIS_R_VERSION_STRING = release
-after_deploy: R -q -e 'tic::after_deploy()'
-after_script: R -q -e 'tic::after_script()'
-# DO NOT CHANGE THE CODE ABOVE
-
-# Custom parts:
-
-# Header
-language: r
-latex: false
-matrix:
-  include:
-    - dist: trusty
-      r: oldrel
-      addons:
-        apt:
-          packages:
-            - libgit2-dev
-    - dist: xenial
-      r: release
-      addons:
-        apt:
-          packages:
-            - libgit2-dev
-    - dist: xenial
-      r: devel
-      addons:
-        apt:
-          packages:
-            - libgit2-dev
-    - os: osx
-      r: release
-      brew_packages: openssl
-sudo: false
-cache: packages
-
-#env
-env:
-  global:
-  - _R_CHECK_FORCE_SUGGESTS_=false
-  - MAKEFLAGS="-j 2"
-
-notifications:
-  email:
-    on_success: change
-    on_failure: change
-
-#services
-services:
diff --git a/DESCRIPTION b/DESCRIPTION
index 6167c9a..5b7cd70 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,47 +1,58 @@
 Package: git2rdata
 Title: Store and Retrieve Data.frames in a Git Repository
-Version: 0.2.1
-Authors@R: c(
-  person(
-    "Thierry", "Onkelinx", role = c("aut", "cre"), 
-    email = "thierry.onkelinx@inbo.be", 
-    comment = c(ORCID = "0000-0001-8804-4216")),
-  person(
-    "Floris", "Vanderhaeghe", role = "ctb", 
-    email = "floris.vanderhaeghe@inbo.be", 
-    comment = c(ORCID = "0000-0002-6378-6229")),
-  person(
-    "Peter", "Desmet", role = "ctb", 
-    email = "peter.desmet@inbo.be", 
-    comment = c(ORCID = "0000-0002-8442-8025")),
-  person(
-    "Els", "Lommelen", role = "ctb", 
-    email = "els.lommelen@inbo.be", 
-    comment = c(ORCID = "0000-0002-3481-5684")),
-  person(
-    "Research Institute for Nature and Forest",
-    role = c("cph", "fnd"), email = "info@inbo.be"))
-Description: Make versioning of data.frame easy and efficient using git repositories.
-Depends: R (>= 3.5.0)
+Version: 0.2.1.9000
+Authors@R: 
+    c(person(given = "Thierry",
+             family = "Onkelinx",
+             role = c("aut", "cre"),
+             email = "thierry.onkelinx@inbo.be",
+             comment = c(ORCID = "0000-0001-8804-4216")),
+      person(given = "Floris",
+             family = "Vanderhaeghe",
+             role = "ctb",
+             email = "floris.vanderhaeghe@inbo.be",
+             comment = c(ORCID = "0000-0002-6378-6229")),
+      person(given = "Peter",
+             family = "Desmet",
+             role = "ctb",
+             email = "peter.desmet@inbo.be",
+             comment = c(ORCID = "0000-0002-8442-8025")),
+      person(given = "Els",
+             family = "Lommelen",
+             role = "ctb",
+             email = "els.lommelen@inbo.be",
+             comment = c(ORCID = "0000-0002-3481-5684")),
+      person(given = "Research Institute for Nature and Forest",
+             role = c("cph", "fnd"),
+             email = "info@inbo.be"))
+Description: Make versioning of data.frame easy and efficient
+    using git repositories.
+License: GPL-3
+URL: https://github.com/ropensci/git2rdata,
+    https://doi.org/10.5281/zenodo.1485309
+BugReports: https://github.com/ropensci/git2rdata/issues
+Depends: 
+    R (>= 3.5.0)
 Imports:
-  assertthat,
-  git2r (>= 0.23.0),
-  methods,
-  yaml
+    assertthat,
+    git2r (>= 0.23.0),
+    methods,
+    yaml
 Suggests:
-  spelling,
-  ggplot2,
-  knitr,
-  microbenchmark,
-  rmarkdown,
-  testthat
-License: GPL-3
+    covr,
+    ggplot2,
+    knitr,
+    microbenchmark,
+    rmarkdown,
+    spelling,
+    testthat
+VignetteBuilder: 
+    knitr
 Encoding: UTF-8
+Language: en-GB
 LazyData: true
 Roxygen: list(markdown = TRUE)
-RoxygenNote: 6.1.1
-URL: https://github.com/ropensci/git2rdata, https://doi.org/10.5281/zenodo.1485309
-BugReports: https://github.com/ropensci/git2rdata/issues
+RoxygenNote: 7.1.0
 Collate:
     'clean_data_path.R'
     'datahash.R'
@@ -58,5 +69,3 @@ Collate:
     'relabel.R'
     'upgrade_data.R'
     'utils.R'
-VignetteBuilder: knitr
-Language: en-GB
diff --git a/NEWS.md b/NEWS.md
index 453c8e6..27753a5 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,4 +1,4 @@
-git2rdata 0.2.1 (2020-02-03)
+git2rdata 0.2.1 (2020-03-02)
 =================================
 
 ### Bugfixes
diff --git a/R/utils.R b/R/utils.R
index bc4b7e1..b93e3a5 100644
--- a/R/utils.R
+++ b/R/utils.R
@@ -2,6 +2,6 @@
 # gramr is avaible from https://github.com/ropenscilabs/gramr
 release_questions <- function() { # nocov start
   c(
-    'Did you ran `gramr::check_project(exclude_chunks = TRUE)`'
+    "Did you ran `gramr::check_project(exclude_chunks = TRUE)`"
   )
 } # nocov end
diff --git a/README.md b/README.md
index 019b1a9..6585616 100644
--- a/README.md
+++ b/README.md
@@ -9,13 +9,12 @@
 [![Licence](https://img.shields.io/badge/licence-GPL--3-blue.svg)](https://www.gnu.org/licenses/gpl-3.0.en.html)
 [![minimal R version](https://img.shields.io/badge/R%3E%3D-3.5.0-6666ff.svg)](https://cran.r-project.org/)
 [![DOI](https://zenodo.org/badge/147685405.svg)](https://zenodo.org/badge/latestdoi/147685405)
-[![Travis-CI Build Status](https://travis-ci.org/ropensci/git2rdata.svg?branch=master)](https://travis-ci.org/ropensci/git2rdata)
-[![AppVeyor Build status](https://ci.appveyor.com/api/projects/status/cfbjb835fqb3dc7m/branch/master?svg=true)](https://ci.appveyor.com/project/ThierryO/git2rdata-n60yg/branch/master)
-[![codecov](https://codecov.io/gh/ropensci/git2rdata/branch/master/graph/badge.svg)](https://codecov.io/gh/ropensci/git2rdata)
 ![GitHub forks](https://img.shields.io/github/forks/ropensci/git2rdata.svg?style=social)
 ![GitHub stars](https://img.shields.io/github/stars/ropensci/git2rdata.svg?style=social)
 ![GitHub code size in bytes](https://img.shields.io/github/languages/code-size/ropensci/git2rdata.svg)
 ![GitHub repo size](https://img.shields.io/github/repo-size/ropensci/git2rdata.svg)
+[![Codecov test coverage](https://codecov.io/gh/ropensci/git2rdata/branch/master/graph/badge.svg)](https://codecov.io/gh/ropensci/git2rdata?branch=master)
+[![R build status](https://github.com/ropensci/git2rdata/workflows/R-CMD-check/badge.svg)](https://github.com/ropensci/git2rdata/actions)
 <!-- badges: end -->
 
 <p style="display:none">Please visit the git2rdata website at https://ropensci.github.io/git2rdata/. The vignette code on the website link to a rendered version of the vignette. Functions have a link to their help file.</p>
diff --git a/appveyor.yml b/appveyor.yml
deleted file mode 100644
index 45d9160..0000000
--- a/appveyor.yml
+++ /dev/null
@@ -1,55 +0,0 @@
-# DO NOT CHANGE the "init" and "install" sections below
-
-# branches to build
-branches:
-  # blacklist
-  except:
-    - gh-pages
-
-# Download script file from GitHub
-init:
-  ps: |
-        $ErrorActionPreference = "Stop"
-        Invoke-WebRequest http://raw.github.com/krlmlr/r-appveyor/master/scripts/appveyor-tool.ps1 -OutFile "..\appveyor-tool.ps1"
-        Import-Module '..\appveyor-tool.ps1'
-install:
-  ps: Bootstrap
-
-cache:
-  - C:\RLibrary
-
-# Adapt as necessary starting from here
-
-build_script:
-  - travis-tool.sh install_deps
-
-test_script:
-  - travis-tool.sh run_tests
-
-on_failure:
-  - 7z a failure.zip *.Rcheck\*
-  - appveyor PushArtifact failure.zip
-
-environment:
-  GITHUB_PAT:
-    secure: VXO22OHLkl4YhVIomSMwCZyOTx03Xf2WICaVng9xH7gISlAg8a+qrt1DtFtk8sK5
-  PKGTYPE: 'win.binary'
-
-artifacts:
-  - path: '*.Rcheck\**\*.log'
-    name: Logs
-
-  - path: '*.Rcheck\**\*.out'
-    name: Logs
-
-  - path: '*.Rcheck\**\*.fail'
-    name: Logs
-
-  - path: '*.Rcheck\**\*.Rout'
-    name: Logs
-
-  - path: '\*_*.tar.gz'
-    name: Bits
-
-  - path: '\*_*.zip'
-    name: Bits
diff --git a/codecov.yml b/codecov.yml
new file mode 100644
index 0000000..04c5585
--- /dev/null
+++ b/codecov.yml
@@ -0,0 +1,14 @@
+comment: false
+
+coverage:
+  status:
+    project:
+      default:
+        target: auto
+        threshold: 1%
+        informational: true
+    patch:
+      default:
+        target: auto
+        threshold: 1%
+        informational: true
diff --git a/man-roxygen/example-prune.R b/man-roxygen/example-prune.R
index d8fcba8..8046fc7 100644
--- a/man-roxygen/example-prune.R
+++ b/man-roxygen/example-prune.R
@@ -72,4 +72,3 @@
 #'   rev(list.files(repo_path, full.names = TRUE, recursive = TRUE,
 #'                  include.dirs = TRUE, all.files = TRUE)),
 #'   repo_path)
-
diff --git a/man/commit.Rd b/man/commit.Rd
index 55f2914..92e152c 100644
--- a/man/commit.Rd
+++ b/man/commit.Rd
@@ -7,8 +7,11 @@
 See \code{\link[git2r]{commit}} in \code{git2r}.
 }
 \seealso{
-Other version_control: \code{\link{pull}},
-  \code{\link{push}}, \code{\link{recent_commit}},
-  \code{\link{repository}}, \code{\link{status}}
+Other version_control: 
+\code{\link{pull}()},
+\code{\link{push}()},
+\code{\link{recent_commit}()},
+\code{\link{repository}()},
+\code{\link{status}()}
 }
 \concept{version_control}
diff --git a/man/git2rdata-package.Rd b/man/git2rdata-package.Rd
index 91ae826..f1dc2b7 100644
--- a/man/git2rdata-package.Rd
+++ b/man/git2rdata-package.Rd
@@ -18,13 +18,13 @@ Useful links:
 
 }
 \author{
-\strong{Maintainer}: Thierry Onkelinx \email{thierry.onkelinx@inbo.be} (0000-0001-8804-4216)
+\strong{Maintainer}: Thierry Onkelinx \email{thierry.onkelinx@inbo.be} (\href{https://orcid.org/0000-0001-8804-4216}{ORCID})
 
 Other contributors:
 \itemize{
-  \item Floris Vanderhaeghe \email{floris.vanderhaeghe@inbo.be} (0000-0002-6378-6229) [contributor]
-  \item Peter Desmet \email{peter.desmet@inbo.be} (0000-0002-8442-8025) [contributor]
-  \item Els Lommelen \email{els.lommelen@inbo.be} (0000-0002-3481-5684) [contributor]
+  \item Floris Vanderhaeghe \email{floris.vanderhaeghe@inbo.be} (\href{https://orcid.org/0000-0002-6378-6229}{ORCID}) [contributor]
+  \item Peter Desmet \email{peter.desmet@inbo.be} (\href{https://orcid.org/0000-0002-8442-8025}{ORCID}) [contributor]
+  \item Els Lommelen \email{els.lommelen@inbo.be} (\href{https://orcid.org/0000-0002-3481-5684}{ORCID}) [contributor]
   \item Research Institute for Nature and Forest \email{info@inbo.be} [copyright holder, funder]
 }
 
diff --git a/man/is_git2rdata.Rd b/man/is_git2rdata.Rd
index 31cd867..86bdf6b 100644
--- a/man/is_git2rdata.Rd
+++ b/man/is_git2rdata.Rd
@@ -55,7 +55,9 @@ is_git2rdata("iris", root)
 junk <- file.remove(list.files(root, full.names = TRUE), root)
 }
 \seealso{
-Other internal: \code{\link{is_git2rmeta}},
-  \code{\link{meta}}, \code{\link{upgrade_data}}
+Other internal: 
+\code{\link{is_git2rmeta}()},
+\code{\link{meta}()},
+\code{\link{upgrade_data}()}
 }
 \concept{internal}
diff --git a/man/is_git2rmeta.Rd b/man/is_git2rmeta.Rd
index b86ab4a..e5e085c 100644
--- a/man/is_git2rmeta.Rd
+++ b/man/is_git2rmeta.Rd
@@ -58,7 +58,9 @@ is_git2rdata("iris", root)
 junk <- file.remove(list.files(root, full.names = TRUE), root)
 }
 \seealso{
-Other internal: \code{\link{is_git2rdata}},
-  \code{\link{meta}}, \code{\link{upgrade_data}}
+Other internal: 
+\code{\link{is_git2rdata}()},
+\code{\link{meta}()},
+\code{\link{upgrade_data}()}
 }
 \concept{internal}
diff --git a/man/list_data.Rd b/man/list_data.Rd
index b5105c0..96953a3 100644
--- a/man/list_data.Rd
+++ b/man/list_data.Rd
@@ -34,7 +34,7 @@ dir.create(root)
 # screen output
 junk <- write_vc(iris[1:6, ], "iris", root, sorting = "Sepal.Length")
 # write a standard tab separate file (non git2rdata object)
-write.table(iris, file = file.path(root, "standard.tsv"), sep = "\\t")
+write.table(iris, file = file.path(root, "standard.tsv"), sep = "\t")
 # write a YAML file
 yml <- list(
   authors = list(
@@ -99,8 +99,11 @@ junk <- file.remove(
   repo_path)
 }
 \seealso{
-Other storage: \code{\link{prune_meta}},
-  \code{\link{read_vc}}, \code{\link{relabel}},
-  \code{\link{rm_data}}, \code{\link{write_vc}}
+Other storage: 
+\code{\link{prune_meta}()},
+\code{\link{read_vc}()},
+\code{\link{relabel}()},
+\code{\link{rm_data}()},
+\code{\link{write_vc}()}
 }
 \concept{storage}
diff --git a/man/meta.Rd b/man/meta.Rd
index 2b83b2c..d1f617b 100644
--- a/man/meta.Rd
+++ b/man/meta.Rd
@@ -15,8 +15,7 @@ meta(x, ...)
 
 \method{meta}{character}(x, na = "NA", ...)
 
-\method{meta}{factor}(x, optimize = TRUE, na = "NA", index,
-  strict = TRUE, ...)
+\method{meta}{factor}(x, optimize = TRUE, na = "NA", index, strict = TRUE, ...)
 
 \method{meta}{logical}(x, optimize = TRUE, ...)
 
@@ -24,8 +23,7 @@ meta(x, ...)
 
 \method{meta}{Date}(x, optimize = TRUE, ...)
 
-\method{meta}{data.frame}(x, optimize = TRUE, na = "NA", sorting,
-  strict = TRUE, ...)
+\method{meta}{data.frame}(x, optimize = TRUE, na = "NA", sorting, strict = TRUE, ...)
 }
 \arguments{
 \item{x}{the vector.}
@@ -80,7 +78,7 @@ The same code on a different locale might result in a different sorting.
 Add \code{strict = FALSE} to enforce the new order of factor levels.
 }
 \examples{
-meta(c(NA, "'NA'", '"NA"', "abc\\tdef", "abc\\ndef"))
+meta(c(NA, "'NA'", '"NA"', "abc\tdef", "abc\ndef"))
 meta(1:3)
 meta(seq(1, 3, length = 4))
 meta(factor(c("b", NA, "NA"), levels = c("NA", "b", "c")))
@@ -99,7 +97,9 @@ meta(as.Date("2019-02-01"))
 meta(as.Date("2019-02-01"), optimize = FALSE)
 }
 \seealso{
-Other internal: \code{\link{is_git2rdata}},
-  \code{\link{is_git2rmeta}}, \code{\link{upgrade_data}}
+Other internal: 
+\code{\link{is_git2rdata}()},
+\code{\link{is_git2rmeta}()},
+\code{\link{upgrade_data}()}
 }
 \concept{internal}
diff --git a/man/prune_meta.Rd b/man/prune_meta.Rd
index 677ad4f..9a0b6fd 100644
--- a/man/prune_meta.Rd
+++ b/man/prune_meta.Rd
@@ -7,8 +7,7 @@
 \usage{
 prune_meta(root = ".", path = NULL, recursive = TRUE, ...)
 
-\method{prune_meta}{git_repository}(root, path = NULL,
-  recursive = TRUE, ..., stage = FALSE)
+\method{prune_meta}{git_repository}(root, path = NULL, recursive = TRUE, ..., stage = FALSE)
 }
 \arguments{
 \item{root}{The root of a project. Can be a file path or a \code{git-repository}.
@@ -49,7 +48,7 @@ dir.create(root)
 # screen output
 junk <- write_vc(iris[1:6, ], "iris", root, sorting = "Sepal.Length")
 # write a standard tab separate file (non git2rdata object)
-write.table(iris, file = file.path(root, "standard.tsv"), sep = "\\t")
+write.table(iris, file = file.path(root, "standard.tsv"), sep = "\t")
 # write a YAML file
 yml <- list(
   authors = list(
@@ -114,8 +113,11 @@ junk <- file.remove(
   repo_path)
 }
 \seealso{
-Other storage: \code{\link{list_data}},
-  \code{\link{read_vc}}, \code{\link{relabel}},
-  \code{\link{rm_data}}, \code{\link{write_vc}}
+Other storage: 
+\code{\link{list_data}()},
+\code{\link{read_vc}()},
+\code{\link{relabel}()},
+\code{\link{rm_data}()},
+\code{\link{write_vc}()}
 }
 \concept{storage}
diff --git a/man/pull.Rd b/man/pull.Rd
index 78ba631..77b7f3a 100644
--- a/man/pull.Rd
+++ b/man/pull.Rd
@@ -7,8 +7,11 @@
 See \code{\link[git2r]{pull}} in \code{git2r}.
 }
 \seealso{
-Other version_control: \code{\link{commit}},
-  \code{\link{push}}, \code{\link{recent_commit}},
-  \code{\link{repository}}, \code{\link{status}}
+Other version_control: 
+\code{\link{commit}()},
+\code{\link{push}()},
+\code{\link{recent_commit}()},
+\code{\link{repository}()},
+\code{\link{status}()}
 }
 \concept{version_control}
diff --git a/man/push.Rd b/man/push.Rd
index 5d4c426..e352621 100644
--- a/man/push.Rd
+++ b/man/push.Rd
@@ -7,8 +7,11 @@
 See \code{\link[git2r]{push}} in  \code{git2r}.
 }
 \seealso{
-Other version_control: \code{\link{commit}},
-  \code{\link{pull}}, \code{\link{recent_commit}},
-  \code{\link{repository}}, \code{\link{status}}
+Other version_control: 
+\code{\link{commit}()},
+\code{\link{pull}()},
+\code{\link{recent_commit}()},
+\code{\link{repository}()},
+\code{\link{status}()}
 }
 \concept{version_control}
diff --git a/man/read_vc.Rd b/man/read_vc.Rd
index 5241730..f2431e5 100644
--- a/man/read_vc.Rd
+++ b/man/read_vc.Rd
@@ -96,8 +96,11 @@ junk <- file.remove(
   repo_path)
 }
 \seealso{
-Other storage: \code{\link{list_data}},
-  \code{\link{prune_meta}}, \code{\link{relabel}},
-  \code{\link{rm_data}}, \code{\link{write_vc}}
+Other storage: 
+\code{\link{list_data}()},
+\code{\link{prune_meta}()},
+\code{\link{relabel}()},
+\code{\link{rm_data}()},
+\code{\link{write_vc}()}
 }
 \concept{storage}
diff --git a/man/recent_commit.Rd b/man/recent_commit.Rd
index a3705b6..2204c9c 100644
--- a/man/recent_commit.Rd
+++ b/man/recent_commit.Rd
@@ -90,8 +90,11 @@ junk <- file.remove(
   repo_path)
 }
 \seealso{
-Other version_control: \code{\link{commit}},
-  \code{\link{pull}}, \code{\link{push}},
-  \code{\link{repository}}, \code{\link{status}}
+Other version_control: 
+\code{\link{commit}()},
+\code{\link{pull}()},
+\code{\link{push}()},
+\code{\link{repository}()},
+\code{\link{status}()}
 }
 \concept{version_control}
diff --git a/man/relabel.Rd b/man/relabel.Rd
index 80db7c4..0a08c79 100644
--- a/man/relabel.Rd
+++ b/man/relabel.Rd
@@ -87,8 +87,11 @@ junk <- file.remove(
   repo_path)
 }
 \seealso{
-Other storage: \code{\link{list_data}},
-  \code{\link{prune_meta}}, \code{\link{read_vc}},
-  \code{\link{rm_data}}, \code{\link{write_vc}}
+Other storage: 
+\code{\link{list_data}()},
+\code{\link{prune_meta}()},
+\code{\link{read_vc}()},
+\code{\link{rm_data}()},
+\code{\link{write_vc}()}
 }
 \concept{storage}
diff --git a/man/repository.Rd b/man/repository.Rd
index a6e8cad..b8e39e4 100644
--- a/man/repository.Rd
+++ b/man/repository.Rd
@@ -7,8 +7,11 @@
 See \code{\link[git2r]{repository}} in \code{git2r}.
 }
 \seealso{
-Other version_control: \code{\link{commit}},
-  \code{\link{pull}}, \code{\link{push}},
-  \code{\link{recent_commit}}, \code{\link{status}}
+Other version_control: 
+\code{\link{commit}()},
+\code{\link{pull}()},
+\code{\link{push}()},
+\code{\link{recent_commit}()},
+\code{\link{status}()}
 }
 \concept{version_control}
diff --git a/man/rm_data.Rd b/man/rm_data.Rd
index ab9069e..6478e66 100644
--- a/man/rm_data.Rd
+++ b/man/rm_data.Rd
@@ -7,9 +7,14 @@
 \usage{
 rm_data(root = ".", path = NULL, recursive = TRUE, ...)
 
-\method{rm_data}{git_repository}(root, path = NULL, recursive = TRUE,
-  ..., stage = FALSE, type = c("unmodified", "modified", "ignored",
-  "all"))
+\method{rm_data}{git_repository}(
+  root,
+  path = NULL,
+  recursive = TRUE,
+  ...,
+  stage = FALSE,
+  type = c("unmodified", "modified", "ignored", "all")
+)
 }
 \arguments{
 \item{root}{The root of a project. Can be a file path or a \code{git-repository}.
@@ -59,7 +64,7 @@ dir.create(root)
 # screen output
 junk <- write_vc(iris[1:6, ], "iris", root, sorting = "Sepal.Length")
 # write a standard tab separate file (non git2rdata object)
-write.table(iris, file = file.path(root, "standard.tsv"), sep = "\\t")
+write.table(iris, file = file.path(root, "standard.tsv"), sep = "\t")
 # write a YAML file
 yml <- list(
   authors = list(
@@ -124,8 +129,11 @@ junk <- file.remove(
   repo_path)
 }
 \seealso{
-Other storage: \code{\link{list_data}},
-  \code{\link{prune_meta}}, \code{\link{read_vc}},
-  \code{\link{relabel}}, \code{\link{write_vc}}
+Other storage: 
+\code{\link{list_data}()},
+\code{\link{prune_meta}()},
+\code{\link{read_vc}()},
+\code{\link{relabel}()},
+\code{\link{write_vc}()}
 }
 \concept{storage}
diff --git a/man/status.Rd b/man/status.Rd
index 372a51d..8751eac 100644
--- a/man/status.Rd
+++ b/man/status.Rd
@@ -7,8 +7,11 @@
 See \code{\link[git2r]{status}} in \code{git2r}.
 }
 \seealso{
-Other version_control: \code{\link{commit}},
-  \code{\link{pull}}, \code{\link{push}},
-  \code{\link{recent_commit}}, \code{\link{repository}}
+Other version_control: 
+\code{\link{commit}()},
+\code{\link{pull}()},
+\code{\link{push}()},
+\code{\link{recent_commit}()},
+\code{\link{repository}()}
 }
 \concept{version_control}
diff --git a/man/upgrade_data.Rd b/man/upgrade_data.Rd
index 1d34204..d8e54d4 100644
--- a/man/upgrade_data.Rd
+++ b/man/upgrade_data.Rd
@@ -7,8 +7,15 @@
 \usage{
 upgrade_data(file, root = ".", verbose, ..., path)
 
-\method{upgrade_data}{git_repository}(file, root = ".", verbose = TRUE,
-  ..., path, stage = FALSE, force = FALSE)
+\method{upgrade_data}{git_repository}(
+  file,
+  root = ".",
+  verbose = TRUE,
+  ...,
+  path,
+  stage = FALSE,
+  force = FALSE
+)
 }
 \arguments{
 \item{file}{the name of the git2rdata object. Git2rdata objects cannot
@@ -59,7 +66,9 @@ upgrade_data(path = ".", root = root)
 junk <- file.remove(list.files(root, full.names = TRUE), root)
 }
 \seealso{
-Other internal: \code{\link{is_git2rdata}},
-  \code{\link{is_git2rmeta}}, \code{\link{meta}}
+Other internal: 
+\code{\link{is_git2rdata}()},
+\code{\link{is_git2rmeta}()},
+\code{\link{meta}()}
 }
 \concept{internal}
diff --git a/man/write_vc.Rd b/man/write_vc.Rd
index 2b85132..1385b35 100644
--- a/man/write_vc.Rd
+++ b/man/write_vc.Rd
@@ -5,11 +5,29 @@
 \alias{write_vc.git_repository}
 \title{Store a Data.Frame as a Git2rdata Object on Disk}
 \usage{
-write_vc(x, file, root = ".", sorting, strict = TRUE,
-  optimize = TRUE, na = "NA", ...)
+write_vc(
+  x,
+  file,
+  root = ".",
+  sorting,
+  strict = TRUE,
+  optimize = TRUE,
+  na = "NA",
+  ...
+)
 
-\method{write_vc}{git_repository}(x, file, root, sorting, strict = TRUE,
-  optimize = TRUE, na = "NA", ..., stage = FALSE, force = FALSE)
+\method{write_vc}{git_repository}(
+  x,
+  file,
+  root,
+  sorting,
+  strict = TRUE,
+  optimize = TRUE,
+  na = "NA",
+  ...,
+  stage = FALSE,
+  force = FALSE
+)
 }
 \arguments{
 \item{x}{the \code{data.frame}.}
@@ -130,8 +148,11 @@ junk <- file.remove(
   repo_path)
 }
 \seealso{
-Other storage: \code{\link{list_data}},
-  \code{\link{prune_meta}}, \code{\link{read_vc}},
-  \code{\link{relabel}}, \code{\link{rm_data}}
+Other storage: 
+\code{\link{list_data}()},
+\code{\link{prune_meta}()},
+\code{\link{read_vc}()},
+\code{\link{relabel}()},
+\code{\link{rm_data}()}
 }
 \concept{storage}
diff --git a/tic.R b/tic.R
index 9c703ec..caa2ebb 100644
--- a/tic.R
+++ b/tic.R
@@ -1,4 +1,4 @@
-add_package_checks()
+do_package_checks()
 
 if (Sys.getenv("id_rsa") != "" && inherits(ci(), "TravisCI")) {
   # pkgdown documentation can be built optionally. Other example criteria:
diff --git a/vignettes/efficiency.Rmd b/vignettes/efficiency.Rmd
index 56380af..7f9cb62 100644
--- a/vignettes/efficiency.Rmd
+++ b/vignettes/efficiency.Rmd
@@ -21,32 +21,27 @@ opts_chunk$set(
   comment = "#>"
 )
 library(ggplot2)
-inbo_colours <- c("#959B38", "#729BB7", "#E87837", "#BDDDD7", "#E4E517", 
+inbo_colours <- c("#959B38", "#729BB7", "#E87837", "#BDDDD7", "#E4E517",
                   "#843860", "#C04384", "#C2C444", "#685457")
 theme_inbo <- function(base_size = 12, base_family = "") {
-  rect.bg <- "white"
-  legend.bg <- "white"
-  panel.bg <- "#F3F3F3"
-  panel.grid <- "white"
-  plot.bg <- "white"
   half_line <- base_size / 2
   theme(
-    line = element_line(colour = "black", size = 0.5, linetype = 1, 
+    line = element_line(colour = "black", size = 0.5, linetype = 1,
                         lineend = "butt"),
-    rect = element_rect(fill = rect.bg, colour = "black", size = 0.5, 
+    rect = element_rect(fill = "white", colour = "black", size = 0.5,
                         linetype = 1),
-    text = element_text(family = base_family, face = "plain", 
-                        colour = "#843860", size = base_size, hjust = 0.5, 
-                        vjust = 0.5, angle = 0, lineheight = 0.9, 
+    text = element_text(family = base_family, face = "plain",
+                        colour = "#843860", size = base_size, hjust = 0.5,
+                        vjust = 0.5, angle = 0, lineheight = 0.9,
                         margin = margin(), debug = FALSE),
     axis.line = element_blank(),
     axis.line.x = element_blank(),
     axis.line.y = element_blank(),
     axis.text = element_text(size = rel(0.8)),
-    axis.text.x = element_text(margin = margin(t = 0.8 * half_line / 2), 
+    axis.text.x = element_text(margin = margin(t = 0.8 * half_line / 2),
                                vjust = 1),
     axis.text.x.top = NULL,
-    axis.text.y = element_text(margin = margin(r = 0.8 * half_line / 2), 
+    axis.text.y = element_text(margin = margin(r = 0.8 * half_line / 2),
                                hjust = 1),
     axis.text.y.right = NULL,
     axis.ticks = element_line(),
@@ -61,8 +56,8 @@ theme_inbo <- function(base_size = 12, base_family = "") {
       angle = 90
     ),
     axis.title.y.right = NULL,
-    legend.background = element_rect(colour = NA, fill = legend.bg),
-    legend.key = element_rect(fill = panel.bg, colour = NA),
+    legend.background = element_rect(colour = NA, fill = "white"),
+    legend.key = element_rect(fill = "#F3F3F3", colour = NA),
     legend.key.size = unit(1.2, "lines"),
     legend.key.height = NULL,
     legend.key.width = NULL,
@@ -72,21 +67,21 @@ theme_inbo <- function(base_size = 12, base_family = "") {
     legend.spacing.y = NULL,
     legend.text = element_text(size = rel(0.8)),
     legend.text.align = NULL,
-    legend.title = element_text(size = rel(0.8), face = "bold", hjust = 0, 
+    legend.title = element_text(size = rel(0.8), face = "bold", hjust = 0,
                                 colour = "black"),
     legend.title.align = NULL,
     legend.position = "right",
     legend.direction = NULL,
     legend.justification = "center",
     legend.box = NULL,
-    legend.box.margin = margin(t = half_line, r = half_line, b = half_line, 
+    legend.box.margin = margin(t = half_line, r = half_line, b = half_line,
                                l = half_line),
-    legend.box.background = element_rect(colour = NA, fill = legend.bg),
+    legend.box.background = element_rect(colour = NA, fill = "white"),
     legend.box.spacing = unit(0.2, "cm"),
-    panel.background = element_rect(fill = panel.bg, colour = NA),
+    panel.background = element_rect(fill = "#F3F3F3", colour = NA),
     panel.border = element_blank(),
-    panel.grid = element_line(colour = panel.grid),
-    panel.grid.minor = element_line(colour = panel.grid, size = 0.25),
+    panel.grid = element_line(colour = "white"),
+    panel.grid.minor = element_line(colour = "white", size = 0.25),
     panel.spacing = unit(half_line, "pt"),
     panel.spacing.x = NULL,
     panel.spacing.y = NULL,
@@ -99,14 +94,14 @@ theme_inbo <- function(base_size = 12, base_family = "") {
     strip.switch.pad.grid = unit(0.1, "cm"),
     strip.switch.pad.wrap = unit(0.1, "cm"),
     strip.placement = "outside",
-    plot.background = element_rect(colour = NA, fill = plot.bg),
-    plot.title = element_text(size = rel(1.2), 
+    plot.background = element_rect(colour = NA, fill = "white"),
+    plot.title = element_text(size = rel(1.2),
                               margin = margin(0, 0, half_line, 0)),
     plot.subtitle = element_text(size = rel(1),
                                  margin = margin(0, 0, half_line, 0)),
     plot.caption = element_text(size = rel(0.6),
                                 margin = margin(0, 0, half_line, 0)),
-    plot.margin = margin(t = half_line, r = half_line, b = half_line, 
+    plot.margin = margin(t = half_line, r = half_line, b = half_line,
                          l = half_line),
     plot.tag = element_text(size = rel(1.2), hjust = 0.5, vjust = 0.5),
     plot.tag.position = "topleft",
@@ -186,12 +181,15 @@ This results in more compact files.
 ```{r table_file_size, echo = FALSE}
 kable(
   data.frame(
-    method = c("saveRDS()", "write_vc(), optimized", "write_vc(), verbose", 
+    method = c("saveRDS()", "write_vc(), optimized", "write_vc(), verbose",
                "write.table()"),
     file_size = c(rds_size, optim_size, verbose_size, base_size) / 2 ^ 10,
     relative = c(rds_size, optim_size, verbose_size, base_size) / base_size
   ),
-  caption = "Resulting file sizes (in kB) and file sizes relative to the size of write.table().",
+  caption = paste(
+    "Resulting file sizes (in kB) and file sizes relative to the size of",
+    "write.table()."
+  ),
   digits = 2
 )
 ```
@@ -240,7 +238,7 @@ ggplot(f_ratio, aes(x = label_length, y = ratio, colour = levels)) +
   geom_hline(yintercept = 1, linetype = 2) +
   geom_line() +
   scale_x_continuous("label length (characters)") +
-  scale_y_continuous("optimized bytes / verbose bytes", 
+  scale_y_continuous("optimized bytes / verbose bytes",
                      breaks = seq(0, 1.25, by = 0.25)) +
   scale_colour_manual("number of \nlevels", values = inbo_colours)
 ```
@@ -276,7 +274,7 @@ ggplot(f_ratio, aes(x = observations, y = ratio, colour = levels)) +
   geom_hline(yintercept = 1, linetype = 2) +
   geom_line() +
   scale_x_log10() +
-  scale_y_continuous("optimized bytes / verbose bytes", 
+  scale_y_continuous("optimized bytes / verbose bytes",
                      breaks = seq(0, 1.25, by = 0.25)) +
   scale_colour_manual("number of \nlevels", values = inbo_colours)
 ```
@@ -295,15 +293,15 @@ library(git2r)
 tmp_repo <- function() {
   root <- tempfile("git2rdata-efficient-git")
   dir.create(root)
-  repo <- init(root)
-  config(repo, user.name = "me", user.email = "me@me.com")
+  repo <- init(root) # nolint
+  config(repo, user.name = "me", user.email = "me@me.com") # nolint
   return(repo)
 }
 commit_and_size <- function(repo, filename) {
   add(repo, filename)
   commit(repo, "test", session = TRUE)
   git_size <- system(
-    sprintf("cd %s\ngit gc\ngit count-objects -v", dirname(repo$path)), 
+    sprintf("cd %s\ngit gc\ngit count-objects -v", dirname(repo$path)),
     intern = TRUE
   )
   git_size <- git_size[grep("size-pack", git_size)]
@@ -320,7 +318,7 @@ repo_size <- replicate(
   100, {
     observed_subset <- rbinom(nrow(airbag), size = 1, prob = 0.9) == 1
     this <- airbag[
-      sample(which(observed_subset)), 
+      sample(which(observed_subset)),
       sample(ncol(airbag))
     ]
     this_sorted <- airbag[observed_subset, ]
@@ -337,8 +335,8 @@ repo_size <- replicate(
     c(
       write.table = commit_and_size(repo_wt, fn_wt),
       write.table.sorted = commit_and_size(repo_wts, fn_wts),
-      saveRDS = commit_and_size(repo_rds, fn_rds), 
-      write_vc.optimized = commit_and_size(repo_wvco, fn_wvco), 
+      saveRDS = commit_and_size(repo_rds, fn_rds),
+      write_vc.optimized = commit_and_size(repo_wvco, fn_wvco),
       write_vc.verbose = commit_and_size(repo_wvcv, fn_wvcv)
     )
 })
@@ -369,28 +367,31 @@ rs <- lapply(
   function(x) {
     if (x == "saveRDS") {
       fun <- "saveRDS"
-      optimized = "yes"
+      optimized <- "yes"
     } else if (x == "write_vc.optimized") {
       fun <- "write_vc"
-      optimized = "yes"
+      optimized <- "yes"
     } else if (x == "write_vc.verbose") {
       fun <- "write_vc"
-      optimized = "no"
+      optimized <- "no"
     } else if (x == "write.table") {
       fun <- "write.table"
-      optimized = "no"
+      optimized <- "no"
     } else if (x == "write.table.sorted") {
       fun <- "write.table"
-      optimized = "yes"
+      optimized <- "yes"
     }
-    data.frame(commit = seq_along(repo_size[x, ]), size = repo_size[x, ], 
+    data.frame(commit = seq_along(repo_size[x, ]), size = repo_size[x, ],
                rel_size = repo_size[x, ] / repo_size["write.table.sorted", ],
                fun = fun, optimized = optimized, stringsAsFactors = FALSE)
   }
 )
 rs <- do.call(rbind, rs)
 rs$optimized <- factor(rs$optimized, levels = c("yes", "no"))
-ggplot(rs, aes(x = commit, y = size / 2^10, colour = fun, linetype = optimized)) +
+ggplot(
+  rs,
+  aes(x = commit, y = size / 2^10, colour = fun, linetype = optimized)
+) +
   geom_line() +
   scale_y_continuous("repo size (in MiB)") +
   scale_colour_manual("function", values = inbo_colours)
@@ -399,7 +400,7 @@ ggplot(rs, aes(x = commit, y = size / 2^10, colour = fun, linetype = optimized))
 ```{r plot_rel_git_size, echo = FALSE, fig.cap = "Relative size of the git repository when compared to write.table()."}
 ggplot(rs, aes(x = commit, y = rel_size, colour = fun, linetype = optimized)) +
   geom_line() +
-  scale_y_continuous("size relative to sorted write.table()", breaks = 0:10) + 
+  scale_y_continuous("size relative to sorted write.table()", breaks = 0:10) +
   scale_colour_manual("function", values = inbo_colours)
 ```
 
@@ -415,14 +416,16 @@ mb <- microbenchmark(
   write.table = write.table(airbag, file.path(root, "base_R.tsv"), sep = "\t"),
   saveRDS = saveRDS(airbag, file.path(root, "base_R.rds")),
   write_vc.optim = write_vc(airbag, "airbag_optimize", root, sorting = "X"),
-  write_vc.verbose = write_vc(airbag, "airbag_verbose", root, sorting = "X", 
+  write_vc.verbose = write_vc(airbag, "airbag_verbose", root, sorting = "X",
                               optimize = FALSE)
 )
 mb$time <- mb$time / 1e6
 ```
 
 ```{r store_file_timings, echo = FALSE}
-if (system.file("efficiency", "file_timings.rds", package = "git2rdata") == "") {
+if (
+  system.file("efficiency", "file_timings.rds", package = "git2rdata") == ""
+) {
   saveRDS(mb, file.path("..", "inst", "efficiency", "file_timings.rds"))
 } else {
   mb <- readRDS(
@@ -433,7 +436,7 @@ if (system.file("efficiency", "file_timings.rds", package = "git2rdata") == "")
 
 ```{r median_write, echo = FALSE}
 median_time <- aggregate(time ~ expr, data = mb, FUN = median)
-write_ratio <- 100 * median_time$time / 
+write_ratio <- 100 * median_time$time /
   median_time$time[median_time$expr == "write.table"]
 names(write_ratio) <- median_time$expr
 ```
@@ -456,7 +459,7 @@ ggplot(mb, aes(x = expr, y = time)) +
 
 ```{r get_read_timings, eval = system.file("efficiency", "read_timings.rds", package = "git2rdata") == ""}
 mb <- microbenchmark(
-  read.table = read.table(file.path(root, "base_R.tsv"), header = TRUE, 
+  read.table = read.table(file.path(root, "base_R.tsv"), header = TRUE,
                           sep = "\t"),
   readRDS = readRDS(file.path(root, "base_R.rds")),
   read_vc.optim = read_vc("airbag_optimize", root),
@@ -466,7 +469,9 @@ mb$time <- mb$time / 1e6
 ```
 
 ```{r store_read_timings, echo = FALSE}
-if (system.file("efficiency", "read_timings.rds", package = "git2rdata") == "") {
+if (
+  system.file("efficiency", "read_timings.rds", package = "git2rdata") == ""
+) {
   saveRDS(mb, file.path("..", "inst", "efficiency", "read_timings.rds"))
 } else {
   mb <- readRDS(
@@ -477,7 +482,7 @@ if (system.file("efficiency", "read_timings.rds", package = "git2rdata") == "")
 
 ```{r median_read, echo = FALSE}
 median_time <- aggregate(time ~ expr, data = mb, FUN = median)
-read_ratio <- 100 * median_time$time / 
+read_ratio <- 100 * median_time$time /
   median_time$time[median_time$expr == "read.table"]
 names(read_ratio) <- median_time$expr
 ```
@@ -486,7 +491,7 @@ The timings on reading the data is another story. Reading the binary format take
 
 ```{r plot_read_timings, echo = FALSE, fig.cap = "Boxplots for the read timings for the different methods."}
 mb$expr <- factor(
-  mb$expr, 
+  mb$expr,
   levels = c("readRDS", "read.table", "read_vc.optim", "read_vc.verbose")
 )
 levels(mb$expr) <- gsub("read_vc\\.", "read_vc\n", levels(mb$expr))
diff --git a/zenodo.json b/zenodo.json
new file mode 100644
index 0000000..a75dfce
--- /dev/null
+++ b/zenodo.json
@@ -0,0 +1,36 @@
+{
+  "title": "git2rdata: Store and Retrieve Data.frames in a Git Repository.",
+  "description": "Make versioning of data.frame easy and efficient using git repositories.",
+  "creators": [
+    {
+      "affiliation": "Research Institute for Nature and Forest (INBO)",
+      "name": "Thierry Onkelinx",
+      "orcid": "0000-0001-8804-4216"
+    },
+    {
+      "affiliation": "Research Institute for Nature and Forest (INBO)",
+      "name": "Floris Vanderhaeghe",
+      "orcid": "0000-0002-6378-6229"
+    },
+    {
+      "affiliation": "Research Institute for Nature and Forest (INBO)",
+      "name": "Peter Desmet",
+      "orcid": "0000-0002-8442-8025"
+    },
+    {
+      "affiliation": "Research Institute for Nature and Forest (INBO)",
+      "name": "Els Lommelen",
+      "orcid": "0000-0002-3481-5684"
+    }
+  ],
+  "upload_type": "software",
+  "license": "GPL-3",
+  "access_right": "open",
+  "keywords": [
+    "data-management",
+    "cyberinfrastructure",
+    "clowder",
+    "open-data",
+    "open-science"
+  ]
+}