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# SparkR CRAN Release
To release SparkR as a package to CRAN, we would use the `devtools` package. Please work with the
`dev@spark.apache.org` community and R package maintainer on this.
### Release
First, check that the `Version:` field in the `pkg/DESCRIPTION` file is updated. Also, check for stale files not under source control.
Note that while `run-tests.sh` runs `check-cran.sh` (which runs `R CMD check`), it is doing so with `--no-manual --no-vignettes`, which skips a few vignettes or PDF checks - therefore it will be preferred to run `R CMD check` on the source package built manually before uploading a release. Also note that for CRAN checks for pdf vignettes to success, `qpdf` tool must be there (to install it, eg. `yum -q -y install qpdf`).
To upload a release, we would need to update the `cran-comments.md`. This should generally contain the results from running the `check-cran.sh` script along with comments on status of all `WARNING` (should not be any) or `NOTE`. As a part of `check-cran.sh` and the release process, the vignettes is build - make sure `SPARK_HOME` is set and Spark jars are accessible.
Once everything is in place, run in R under the `SPARK_HOME/R` directory:
```R
paths <- .libPaths(); .libPaths(c("lib", paths)); Sys.setenv(SPARK_HOME=tools::file_path_as_absolute("..")); devtools::release(); .libPaths(paths)
```
For more information please refer to http://r-pkgs.had.co.nz/release.html#release-check
### Testing: build package manually
To build package manually such as to inspect the resulting `.tar.gz` file content, we would also use the `devtools` package.
Source package is what get released to CRAN. CRAN would then build platform-specific binary packages from the source package.
#### Build source package
To build source package locally without releasing to CRAN, run in R under the `SPARK_HOME/R` directory:
```R
paths <- .libPaths(); .libPaths(c("lib", paths)); Sys.setenv(SPARK_HOME=tools::file_path_as_absolute("..")); devtools::build("pkg"); .libPaths(paths)
```
(http://r-pkgs.had.co.nz/vignettes.html#vignette-workflow-2)
Similarly, the source package is also created by `check-cran.sh` with `R CMD build pkg`.
For example, this should be the content of the source package:
```sh
DESCRIPTION R inst tests
NAMESPACE build man vignettes
inst/doc/
sparkr-vignettes.html
sparkr-vignettes.Rmd
sparkr-vignettes.Rman
build/
vignette.rds
man/
*.Rd files...
vignettes/
sparkr-vignettes.Rmd
```
#### Test source package
To install, run this:
```sh
R CMD INSTALL SparkR_2.1.0.tar.gz
```
With "2.1.0" replaced with the version of SparkR.
This command installs SparkR to the default libPaths. Once that is done, you should be able to start R and run:
```R
library(SparkR)
vignette("sparkr-vignettes", package="SparkR")
```
#### Build binary package
To build binary package locally, run in R under the `SPARK_HOME/R` directory:
```R
paths <- .libPaths(); .libPaths(c("lib", paths)); Sys.setenv(SPARK_HOME=tools::file_path_as_absolute("..")); devtools::build("pkg", binary = TRUE); .libPaths(paths)
```
For example, this should be the content of the binary package:
```sh
DESCRIPTION Meta R html tests
INDEX NAMESPACE help profile worker
```
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