ARROW-6142: [R] Install instructions on linux could be clearer

This updates the language in `install_arrow()` to follow the README revision that will land in https://github.com/apache/arrow/pull/4948/files#diff-563b2cb2c8c2d51b2ff6b177e2d84286R33.

The [Jira ticket](https://issues.apache.org/jira/browse/ARROW-6142) requested three things; this is `#2` in the list. On `#1`, I defer to the C++ installation docs, which are already included in the install_arrow message, rather than duplicating content here. `#3` is out of scope.

Closes apache#5027 from nealrichardson/no-ppa and squashes the following commits:

80b142e <Neal Richardson> s/arrow/Arrow/
44c9659 <Neal Richardson> Tweak language again
36cfe28 <Neal Richardson> Further linux install revisions
79bd7e0 <Neal Richardson> One more PPurge
63f75bd <Neal Richardson> Revise install_arrow instructions for Linux

Authored-by: Neal Richardson <neal.p.richardson@gmail.com>
Signed-off-by: Sutou Kouhei <kou@clear-code.com>

r/R/install-arrow.R

@@ -56,7 +56,7 @@ install_arrow_msg <- function(has_arrow, version, from_cran, os) {
  # Point to compilation instructions on readme
  msg <- c(SEE_DEV_GUIDE, THEN_REINSTALL)
  } else {
- # Suggest arrow.apache.org/install for PPAs, or compilation instructions
+ # Suggest arrow.apache.org/install, or compilation instructions
  msg <- c(paste(SEE_ARROW_INSTALL, OR_SEE_DEV_GUIDE), THEN_REINSTALL)
  }
  } else if (!dev_version && !from_cran) {
@@ -98,7 +98,10 @@ OR_SEE_DEV_GUIDE <- paste0(
 SEE_ARROW_INSTALL <- paste(
  "See the Apache Arrow project installation page",
  "<https://arrow.apache.org/install/>",
- "for how to install the C++ package from a PPA."
+ "to find pre-compiled binary packages for some common Linux distributions,",
+ "including Debian, Ubuntu, and CentOS. You'll need to install",
+ "'libparquet-dev' on Debian and Ubuntu, or 'parquet-devel' on CentOS. This",
+ "will also automatically install the Arrow C++ library as a dependency."
 )
 
 THEN_REINSTALL <- paste(

r/README.Rmd

@@ -30,7 +30,7 @@ Install the latest release of `arrow` from CRAN with
 install.packages("arrow")
 ```
 
-On macOS and Windows, installing a binary package from CRAN will handle Arrow's C++ dependencies for you. On Linux, you'll need to first install the C++ library. See the [Arrow project installation page](https://arrow.apache.org/install/) for a list of PPAs from which you can obtain it.
+On macOS and Windows, installing a binary package from CRAN will handle Arrow's C++ dependencies for you. On Linux, you'll need to first install the C++ library. See the [Arrow project installation page](https://arrow.apache.org/install/) to find pre-compiled binary packages for some common Linux distributions, including Debian, Ubuntu, and CentOS. You'll need to install `libparquet-dev` on Debian and Ubuntu, or `parquet-devel` on CentOS. This will also automatically install the Arrow C++ library as a dependency.
 
 If you install the `arrow` package from source and the C++ library is not found, the R package functions will notify you that Arrow is not available. Call
 

r/README.md

@@ -30,8 +30,11 @@ install.packages("arrow")
 On macOS and Windows, installing a binary package from CRAN will handle
 Arrow’s C++ dependencies for you. On Linux, you’ll need to first install
 the C++ library. See the [Arrow project installation
-page](https://arrow.apache.org/install/) for a list of PPAs from which
-you can obtain it.
+page](https://arrow.apache.org/install/) to find pre-compiled binary
+packages for some common Linux distributions, including Debian, Ubuntu,
+and CentOS. You’ll need to install `libparquet-dev` on Debian and
+Ubuntu, or `parquet-devel` on CentOS. This will also automatically
+install the Arrow C++ library as a dependency.
 
 If you install the `arrow` package from source and the C++ library is
 not found, the R package functions will notify you that Arrow is not
@@ -52,7 +55,7 @@ set.seed(24)
 
 tab <- arrow::table(x = 1:10, y = rnorm(10))
 tab$schema
-#> arrow::Schema 
+#> arrow::Schema
 #> x: int32
 #> y: double
 tab

r/tests/testthat/test-install-arrow.R

@@ -51,7 +51,7 @@ r_only({
  test_that("Linux on release version gets pointed to PPA first, then C++", {
  expect_match(
  install_arrow_msg(FALSE, "0.13.0", os="linux"),
- "PPA. Or, see the Arrow C++ developer guide",
+ "dependency. Or, see the Arrow C++ developer guide",
  fixed = TRUE
  )
  })