yaml

2.3.12

Methods to Convert R Data to YAML and Back

384packages depend

13.7Mdownloads / year

54.8%test coverage

11/13checks pass

Overview

About

Maintained by Hadley WickhamFirst published 2008-03-2138 releasesCRAN page ↗GitHub ↗

Implements the 'libyaml' 'YAML' 1.1 parser and emitter (https://pyyaml.org/wiki/LibYAML) for R.

Install

R (CRAN)pak (dev)Ubuntu (r2u)Fedora (COPR)openSUSE (OBS)

install.packages("yaml", repos = "https://cloud.r-project.org/")

Installs the current CRAN release. Prebuilt binaries on Windows and macOS.

if (!requireNamespace("pak", quietly = TRUE))
  install.packages("pak", repos = "https://cloud.r-project.org/")
pak::pak("r-lib/yaml")

Development version from r-lib/yaml. Installs pak first if it is not already available.

Release

# enable cranapt (r2u) if it is not already set up, then install
grep -rqs r2u.stat.illinois.edu /etc/apt/sources.list /etc/apt/sources.list.d/ \
  || curl -fsSL https://raw.githubusercontent.com/eddelbuettel/r2u/master/inst/scripts/add_cranapt_noble.sh | sudo bash
sudo apt install -y r-cran-yaml

Fast Ubuntu binaries via r2u (no compilation). The cranapt setup runs once and is skipped when it is already enabled.

bspm (used by r2u) also needs make: sudo apt install make

# enable the iucar/cran COPR if it is not already present, then install
ls /etc/yum.repos.d/*iucar*cran*.repo >/dev/null 2>&1 \
  || sudo dnf copr enable -y iucar/cran
sudo dnf install -y R-CRAN-yaml

RPMs from the iucar/cran COPR, rebuilt from CRAN.

For install.packages() integration in R, also: sudo dnf install R-CoprManager

# add the autoCRAN OBS repo (Tumbleweed) if it is missing, then install
zypper -q lr | grep -qi autoCRAN \
  || sudo zypper addrepo https://download.opensuse.org/repositories/devel:/languages:/R:/autoCRAN/openSUSE_Tumbleweed/devel:languages:R:autoCRAN.repo
sudo zypper install -y R-yaml

RPMs auto-built from CRAN on openSUSE OBS (Tumbleweed).

Health

CRAN checks

1ERROR1NOTE11OK

Failing flavors

NOTE r-release-macos-arm64
ERROR r-release-macos-x86_64

Slowest check: 2.6 min · r-oldrel-macos-x86_64

Code health

Yes

Tests · ratio 2.81

54.8%

Coverage · measured lines

100%

Documentation · exports

Dependencies · direct

Check history

ERROR2026-05-02
11 OK · 1 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
NOTE2026-04-27
11 OK · 1 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
OK2026-03-31
14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
ERROR2026-03-28
13 OK · 0 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
OK2026-03-25
14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Show 2 earlier snapshots

ERROR2026-03-22
13 OK · 0 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
OK2026-03-10
14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMEYes · 75 wordsVignettesYes · dynamicpkgdown siteNoNEWSYes · 100% structuredCode of conductNoContributing guideNo

Examples that run: 80%
Documented parameters: 98%
Return-value docs: 80%
References docs: 50%

Downloads

13.7M

CRAN downloads in the past year

Rank #46 · ~37.4K/day · ~1.1M/mo

Releases R versions

Daily download trend is not available in this view yet.

1.1M30 days

3.4M90 days

13.7M1 year

Compare downloads with other packages →

Also on199.8K r2u190 autocran1.2M conda_forge641 bioconda11.8K c2d4u

Repository

GitHub ↗ r-lib/yaml

169Stars

43Forks

16Open issues

1Open PRs

3Releases

365Commits

23Contributors

ryamlcran

365 commits · Last activity 2026-02-28 · 0% stars, 30d

Stars over time

2025-07-03 · 1642026-07-07 · 169

Repository practices

Upstream repositoryBeta

6 development-tooling and community-health practices detected across 5 families in the upstream repository

Checks run against github.com/r-lib/yaml on 2026-07-19.

Continuous integration (1)

GitHub Actions

CRAN release process (1)

cran-comments.md

Docs source (1)

README.Rmd

Lint, format, editor (2)

AirVS Code

Show all practices

Coverage (1)

Codecov

How this is detected·Detection ruleset v1 (2026-07-18)

Dependencies

Declared dependencies

3 external dependencies (excludes base and recommended)

Depends (0)

none

Imports (0)

none

LinkingTo (0)

none

Suggests (3)

knitr rmarkdown testthat

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

384direct

3,513indirect

and 336 more packages.

Code & Tests

Code Composition

C 17,183 (86%)R 1,949 (10%)Rd 539 (3%)Vignettes 261 (1%)YAML 45 (0%)

Code characteristics

Cyclomatic complexity: 2.0 median / 13 max
Test cases: 171 / 2.81 per code line

Test coverage

Line coverage

55%

Expression

54.6%

Tests / Examples

54.8% / 34% ex

Functions

245 6 exported

Complexity

4.6 avg / 13 max

Call network

245 nodes / 451 edges

Call graph

Open call graph →

Loading call graph…

Lowest coverage

245 functions

Function	Cyclo	Coverage
verbatim_logical exp	1	0%
.onUnload	1	0%
write_yaml exp	5	67%
read_yaml exp	13	84%
yaml.load_file exp	9	94%
as.yaml exp	1	100%

People & History

People (14)

Maintainer (1)

Hadley Wickham

Maintainer · added in 2.1.19

Authors (2)

Kirill Simonov

Author · added in 2.1.19

Jeremy Stephens

Author, Contributor

Contributors (12)

Jeremy Stephens

Author, Contributor

reikoch

Contributor · added in 2.3.11

Will Beasley

Contributor · added in 2.1.19

Zhuoer Dong

Contributor · added in 2.1.19

Charlie Gao

Contributor · added in 2.3.9

Shawn Garbett

Contributor · added in 2.3.11

Jeffrey Horner

Contributor · added in 2.1.19

Zhian N. Kamvar

Contributor · added in 2.2.2

Show 4 more contributors

Brendan O'Connor

Contributor · added in 2.1.19

Michael Quinn

Contributor · added in 2.2.2

Gregory R. Warnes

Contributor · added in 2.1.19

Yihui Xie

Contributor · added in 2.1.19

Listed in earlier versions (3)

Shawn P Garbett

no longer listed · 2.3.5 to 2.3.10

Zhian N.

no longer listed · 2.3.11 to 2.3.12

Gregory R.

no longer listed · 2.3.11 to 2.3.12

Package Timeline

38 releases. Pick two to compare their code metrics. R releases are shown for context.

R
R 4.6.0 released · 2026-04-24
2.3.12Latest
2025-12-10 · current release · diff ↗
2.3.11
2025-11-28 · diff ↗
R
R 4.5.0 released · 2025-04-11
2.3.10
2024-07-26 · diff ↗
2.3.9
2024-07-05 · diff ↗
R
R 4.4.0 released · 2024-04-24
2.3.8
2023-12-11 · diff ↗
R
R 4.3.0 released · 2023-04-21
2.3.7
2023-01-23 · diff ↗
2.3.6
2022-10-18 · diff ↗
R
R 4.2.0 released · 2022-04-22
2.3.5
2022-02-21 · diff ↗
2.3.4
2022-02-17 · diff ↗
2.2.2
2022-01-25 · diff ↗
R
R 4.1.0 released · 2021-05-18

Show 46 earlier events

R
R 4.0.0 released · 2020-04-24
2.2.1
2020-02-01 · diff ↗
R
R 3.6.0 released · 2019-04-26
2.2.0
2018-07-25 · diff ↗
2.1.19
2018-05-01 · diff ↗
R
R 3.5.0 released · 2018-04-23
2.1.18
2018-03-08 · diff ↗
2.1.17
2018-02-28 · diff ↗
2.1.16
2017-12-12 · diff ↗
2.1.15
2017-12-02 · diff ↗
R
R 3.4.0 released · 2017-04-21
2.1.14
2016-11-12 · diff ↗
R
R 3.3.0 released · 2016-05-03
R
R 3.2.0 released · 2015-04-16
2.1.13
2014-06-12 · diff ↗
2.1.12
2014-06-11 · diff ↗
R
R 3.1.0 released · 2014-04-10
2.1.11
2014-03-15 · diff ↗
2.1.10
2014-01-04 · diff ↗
2.1.9
2013-12-29 · diff ↗
2.1.8
2013-08-23 · diff ↗
R
R 3.0.0 released · 2013-04-03
2.1.7
2013-03-05 · diff ↗
2.1.6
2013-01-18 · diff ↗
2.1.5
2012-11-15 · diff ↗
2.1.4
2012-04-05 · diff ↗
R
R 2.15.0 released · 2012-03-30
2.1.3
2012-01-31 · diff ↗
2.1.2
2012-01-17 · diff ↗
2.1.1
2011-12-08 · diff ↗
2.1.0
2011-12-03 · diff ↗
2.0.0
2011-11-12 · diff ↗
R
R 2.14.0 released · 2011-10-31
1.2.0
2011-06-17 · diff ↗
R
R 2.13.0 released · 2011-04-13
R
R 2.12.0 released · 2010-10-15
R
R 2.11.0 released · 2010-04-22
R
R 2.10.0 released · 2009-10-26
1.1.0
2009-09-12 · diff ↗
1.0.2
2009-08-26 · diff ↗
R
R 2.9.0 released · 2009-04-17
1.0.1
2008-11-14 · diff ↗
R
R 2.8.0 released · 2008-10-20
R
R 2.7.0 released · 2008-04-22
1.0
2008-03-21
R
R 2.6.0 released · 2007-10-03

Package metadata

First published: 2008-03-21
Total releases: 38 / 18 yrs
License: BSD_3_clause + file LICENSE OSI
Download size: 106 KB
Installed size: not tracked yet
With dependencies: not tracked yet

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