Reducing the verbosity of wget progress updates when build output is not connected to a tty

[lopopolo]

Hi 👋 Thank you for ruby-install.

I'm using ruby-install in a Docker container to install a pinned Ruby version.

By default, ruby-installer will use wget, if it is installed, to download the source tarball. The default progress reporting option for wget is quite verbose and bloats the build log for the container.

hadolint, a tool for linting Dockerfiles, suggests passing --progress=dot:giga to limit the verbosity of wget progress updates.

Would making this behavior the default or exposing a CLI switch be something suitable for this project?

Build log

Docker build log of ruby-install invocation

``` + /opt/ruby-install-0.8.1/bin/ruby-install --no-install-deps --install-dir /usr/local/ ruby 2.6.3 -- --disable-install-rdoc >>> Updating ruby versions ... >>> Installing ruby 2.6.3 into /usr/local/ ... >>> Downloading https://cache.ruby-lang.org/pub/ruby/2.6/ruby-2.6.3.tar.xz into /usr/local/src ... --2021-03-25 03:15:15-- https://cache.ruby-lang.org/pub/ruby/2.6/ruby-2.6.3.tar.xz Resolving cache.ruby-lang.org (cache.ruby-lang.org)... 151.101.53.178, 2a04:4e42:d::434 Connecting to cache.ruby-lang.org (cache.ruby-lang.org)|151.101.53.178|:443... connected. HTTP request sent, awaiting response... 200 OK Length: 11904360 (11M) [application/x-tar] Saving to: '/usr/local/src/ruby-2.6.3.tar.xz.part' 0K .......... .......... .......... .......... .......... 0% 1.52M 7s 50K .......... .......... .......... .......... .......... 0% 1.96M 7s 100K .......... .......... .......... .......... .......... 1% 1.26M 7s 150K .......... .......... .......... .......... .......... 1% 1.95M 7s 200K .......... .......... .......... .......... .......... 2% 1.24M 7s 250K .......... .......... .......... .......... .......... 2% 1.63M 7s 300K .......... .......... .......... .......... .......... 3% 1.88M 7s 350K .......... .......... .......... .......... .......... 3% 2.03M 7s 400K .......... .......... .......... .......... .......... 3% 1.95M 7s 450K .......... .......... .......... .......... .......... 4% 1.74M 7s 500K .......... .......... .......... .......... .......... 4% 1.89M 6s 550K .......... .......... .......... .......... .......... 5% 2.14M 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Example

I've added --progress=dot:giga elsewhere in my Dockerfile and it renders output like this:

+ wget --progress=dot:giga https://static.rust-lang.org/rustup/archive/1.23.1/x86_64-unknown-linux-gnu/rustup-init
--2021-03-25 03:14:59--  https://static.rust-lang.org/rustup/archive/1.23.1/x86_64-unknown-linux-gnu/rustup-init
Resolving static.rust-lang.org (static.rust-lang.org)... 65.8.17.19, 65.8.17.81, 65.8.17.112, ...
Connecting to static.rust-lang.org (static.rust-lang.org)|65.8.17.19|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 12817272 (12M) [binary/octet-stream]
Saving to: 'rustup-init'

     0K ........ ....                      100% 19.3M=0.6s

2021-03-25 03:14:59 (19.3 MB/s) - 'rustup-init' saved [12817272/12817272]

[havenwood]

My only concern is portability. It might be worth considering how broadly this works but spot checking it seems good. Also, works on my machine!

[postmodern]

Great idea, although I tend to not recommend using ruby-install in a Dockerfile (manually building ruby or using the official ruby docker images is probably easier). Alternatively, we should pass --quiet to wget if stdout is not a TTY? We would also need to make a similar change to the curl command.