Add Alpine linux build for packed-mn

[ronaldtse]

I suppose we will need to update Tebako to support this?

[maxirmx]

We will have to create build scripts for everything

1. folly
2. dwarfs
3. libdwarfs
   Alpine Linux support tamatebako/libdwarfs#80 for these three
4. tebako-patched ruby
   Alpine Linux support tamatebako/tebako#78

There are some known issues with folly (ref facebook/folly#1478) This is something to start with.

[ronaldtse]

For Ruby, this is how the Docker team compiles Ruby on Alpine: https://github.com/docker-library/ruby/blob/master/3.1/alpine3.15/Dockerfile

[maxirmx]

Well, they have broken ncurses package

static library is missing though the link is there. This is not a showstopper, but another package to build and install manually

[ronaldtse]

Well, they have broken ncurses package

static library is missing though the link is there. This is not a showstopper, but another package to build and install manually

Is this a bug with Alpine? If so, we probably should report to Alpine?

[maxirmx]

Is this a bug with Alpine? If so, we probably should report to Alpine?

Prior to v3.15 there is no ncurses static library at all
In 3.15 there is a bug as shown
In the latest edge (unstable) it is fixed, so I do not think we need to report.
I consider it too risky to use to unstable version.

[ronaldtse]

Got it, then we should make packed-mn available for Alpine > 3.15, ignoring 3.15.

[maxirmx]

Another required folly patch:
facebook/folly#1754

[maxirmx]

Status
I have created a preliminary version of Alpine CI script https://github.com/metanorma/packed-mn/actions/workflows/alpine.yml

• seven_zip_ruby compatibility issue Alpine 3.16 (which is now 'latest') installs gcc 11.x that does not work for seven_zip_ruby 7z.so fails to compile with gcc 11.x masamitsu-murase/seven_zip_ruby#36
  I am dealing with it by building on Alpine 3.15 but it can be considered short term solution obly

• expressir musl compatibility issue Failure when loaded in Alpine Linux with musl-dev lutaml/expressir#106
  I am dealing with it by using force_ruby_platform true but it has side effect of rebuilding extensions for other gems and causes the next issue

• when native extensions for nokogiry and some other gems are rebuild they use dynamic linking and create external dependancies that need to be satisfied at run time: apk --no-cache --upgrade add git libstdc++ xz libarchive
  I am ignoring it for now though these requirements violate initial self-sufficiency requirement

• fontist gem has some ssl certificates issue
  /__tebako_memfs__/lib/ruby/gems/2.7.0/gems/fontist-1.14.2/lib/fontist/font_installer.rb:68:in `download_file': Invalid URL: https://github.com/fontist/source-fonts/releases/download/v1.0/source-fonts-1.0.zip. Error: #<Down::SSLError: SSL_connect returned=1 errno=0 state=error: certificate verify failed (unable to get local issuer certificate)>. (Fontist::Errors::InvalidResourceError)
  openssl does verification without problems and wget works with this uri so it is not about missing certificate.
  This issue is blocker for now. Probably we need to create Alpine CI for fontis as well

Attn @ronaldtse