うなすけとあれこれ

name: "unit test on ubuntu"

on:
  push:
    branches: "*"
jobs:
  test:
    strategy:
      matrix:
        os: [ubuntu-16.04, ubuntu-18.04]
        ruby: [2.2, 2.3, 2.4, 2.5, 2.6, 2.7, head]
      fail-fast: false
    runs-on: ${{ matrix.os }}
    steps:
      - uses: actions/checkout@v2
      - uses: ruby/setup-ruby@v1
        with:
          ruby-version: ${{ matrix.ruby }}
      - run: bundle install
      - run: bundle exec rake spec:unit

puts "\u304c"
puts "String#encode('Shift_JIS') => #{"\u304c".encode('Shift_JIS').inspect}"
puts "codepoints => #{"\u304c".codepoints}"
puts "NFKC normalized codepoints => #{"\u304c".unicode_normalize(:nfkc).codepoints}"
puts "Encode to SJIS with NFKC => #{"\u304c".unicode_normalize(:nfkc).encode('Shift_JIS').inspect}"

puts "=" * 20

puts "\u304b\u3099"
puts "String#encode('Shift_JIS', undef: :replace) => #{"\u304b\u3099".encode('Shift_JIS', undef: :replace).inspect}"
puts "codepoints => #{"\u304b\u3099".codepoints.inspect}"
puts "NFKC normalized codepoints => #{"\u304b\u3099".unicode_normalize(:nfkc).codepoints}"
puts "Encode to SJIS with NFKC => #{"\u304b\u3099".unicode_normalize(:nfkc).encode('Shift_JIS').inspect}"

puts "=" * 20

puts "\u0063\u006d"
puts "String#encode('Shift_JIS') => #{"\u0063\u006d".encode('Shift_JIS').inspect}"
puts "codepoints => #{"\u0063\u006d".codepoints}"
puts "NFKC normalized codepoints => #{"\u0063\u006d".unicode_normalize(:nfkc).codepoints}"

puts "=" * 20

puts "\u339d"
puts "String#encode('Shift_JIS', undef: :replace) => #{"\u339d".encode('Shift_JIS', undef: :replace).inspect}"
puts "codepoints => #{"\u339d".codepoints}"
puts "NFKC normalized codepoints => #{"\u339d".unicode_normalize(:nfkc).codepoints}"

$ ruby script.rb
が
String#encode('Shift_JIS') => "\x{82AA}"
codepoints => [12364]
NFKC normalized codepoints => [12364]
Encode to SJIS with NFKC => "\x{82AA}"
====================
が
String#encode('Shift_JIS', undef: :replace) => "\x{82A9}?"
codepoints => [12363, 12441]
NFKC normalized codepoints => [12364]
Encode to SJIS with NFKC => "\x{82AA}"
====================
cm
String#encode('Shift_JIS') => "cm"
codepoints => [99, 109]
NFKC normalized codepoints => [99, 109]
====================
㎝
String#encode('Shift_JIS', undef: :replace) => "?"
codepoints => [13213]
NFKC normalized codepoints => [99, 109]

import unicodedata

print('\u304c (U+304c)')
print('codepoints => ', end='')
for char in '\u304c'.strip():
  print(hex(ord(char)) + ' ' , end='')
print()
print('NFKC normalized codepoints => ', end='')
for char in unicodedata.normalize('NFKC', '\u304c').strip():
  print(hex(ord(char)) + ' ' , end='')
print()
print('=' * 20)

print('\u304b\u3099 (U+304b U+3099)')
print('codepoints => ', end='')
for char in '\u304b\u3099'.strip():
  print(hex(ord(char)) + ' ' , end='')
print()
print('NFKC normalized codepoints => ', end='')
for char in unicodedata.normalize('NFKC', '\u304b\u3099').strip():
  print(hex(ord(char)), end='')
print()
print('=' * 20)

print('\u0063\u006d (U+0063 U+006d)')
print('codepoints => ', end='')
for char in '\u0063\u006d'.strip():
  print(hex(ord(char)) + ' ' , end='')
print()
print('NFKC normalized codepoints => ', end='')
for char in unicodedata.normalize('NFKC', '\u0063\u006d').strip():
  print(hex(ord(char)) + ' ' , end='')
print()
print('=' * 20)

print('\u339d (U+339d)')
print('codepoints => ', end='')
for char in '\u339d'.strip():
  print(hex(ord(char)) + ' ' , end='')
print()
print('NFKC normalized codepoints => ', end='')
for char in unicodedata.normalize('NFKC', '\u339d').strip():
  print(hex(ord(char)) + ' ' , end='')
print()

package main

import (
    "fmt"

    "strings"

    "unicode/utf8"

    "golang.org/x/text/unicode/norm"
)

func printCodepoints(str string) {
    fmt.Print("codepoints => ")
    for i, w := 0, 0; i < len(str); i += w {
        runeValue, width := utf8.DecodeRuneInString(str[i:])
        fmt.Printf("%U ", runeValue)
        w = width
    }
    fmt.Print("\n")
}

func main() {
    fmt.Println("\u304c (U+304c)")
    printCodepoints("\u304c")

    fmt.Print("NFKC normalized ")
    printCodepoints(norm.NFKC.String("\u304c"))

    fmt.Println(strings.Repeat("=", 20))

    fmt.Println("\u304b\u3099 (U+204c u+3099)")
    printCodepoints("\u304b\u3099")

    fmt.Print("NFKC normalized ")
    printCodepoints(norm.NFKC.String("\u304b\u3099"))

    fmt.Println(strings.Repeat("=", 20))

    fmt.Println("\u0063\u006d (U+0063 U+006d)")
    printCodepoints("\u0063\u006d")

    fmt.Print("NFKC normalized ")
    printCodepoints(norm.NFKC.String("\u0063\u006d"))

    fmt.Println(strings.Repeat("=", 20))

    fmt.Println("\u339d (U+339d)")
    printCodepoints("\u339d")

    fmt.Print("NFKC normalized ")
    printCodepoints(norm.NFKC.String("\u339d"))
}

// function from https://jsprimer.net/basic/string-unicode/#code-point-is-not-code-unit
function convertCodeUnits(str) {
    const codeUnits = [];
    for (let i = 0; i < str.length; i++) {
        codeUnits.push(str.charCodeAt(i).toString(16));
    }
    return codeUnits;
}


console.log('\u304c (U+304c)')
console.log('codepoints => ' + convertCodeUnits('\u304c'))
console.log('NFKC normalized codepoints => ' + convertCodeUnits('\u304c'.normalize('NFKC')))
console.log('=' .repeat(20))


console.log('\u304b\u3099 (U+304b U+3099)')
console.log('codepoints => ' + convertCodeUnits('\u304b\u3099'))
console.log('NFKC normalized codepoints => ' + convertCodeUnits('\u304b\u3099'.normalize('NFKC')))
console.log('='.repeat(20))

console.log('\u0063\u006d (U+0063 U+006d)')
console.log('codepoints => ' + convertCodeUnits('\u0063\u006d'))
console.log('NFKC normalized codepoints => ' + convertCodeUnits('\u0063\u006d'.normalize('NFKC')))
console.log('='.repeat(20))


console.log('\u339d (U+339d)')
console.log('codepoints => ' + convertCodeUnits('\u339d'))
console.log('NFKC normalized codepoints => ' + convertCodeUnits('\u339d'.normalize('NFKC')))
console.log('='.repeat(20))

require 'kconv' # kconvはnkfのラッパーです

puts "\u304c (U+304c)"
puts "Endoce to SJIS by nkf => #{"\u304c".tosjis.inspect}"
puts "=" * 20

puts "\u304b\u3099 (U+304b U+3099)"
puts "Endoce to SJIS to UTF-8 by nkf => #{"\u304b\u3099".tosjis.toutf8}"

puts "=" * 20

puts "\u0063\u006d (U+0063 U+006d)"
puts "Endoce to SJIS by nkf => #{"\u0063\u006d".tosjis.inspect}"

puts "=" * 20

puts "\u339d (U+339d)"
puts "Endoce to SJIS to UTF-8 by nkf => #{"\u339d".tosjis.toutf8}"

$ ruby script.rb
が (U+304c)
Endoce to SJIS by nkf => "\x{82AA}"
====================
が (U+304b U+3099)
Endoce to SJIS to UTF-8 by nkf => 縺九ｙ
====================
cm (U+0063 U+006d)
Endoce to SJIS by nkf => "cm"
====================
㎝ (U+339d)
Endoce to SJIS to UTF-8 by nkf => ㎝

# nkf.rbとして保存
require 'nkf'

puts "\u304b\u3099 : U+304b U+3099"
puts "nkf --ic=UTF-8 --oc=Shift_JIS"
ga_to_sjis_from_utf8 = NKF.nkf('--ic=UTF-8 --oc=Shift_JIS', "\u304b\u3099")
puts ga_to_sjis_from_utf8.inspect
puts ga_to_sjis_from_utf8.encode('UTF-8')

puts "=" * 20

puts "nkf --ic=UTF-8-MAC --oc=Shift_JIS"
ga_to_sjis_from_utf8mac = NKF.nkf('--ic=UTF-8-MAC --oc=Shift_JIS', "\u304b\u3099")
puts ga_to_sjis_from_utf8mac.inspect
puts ga_to_sjis_from_utf8mac.encode('UTF-8')

puts "=" * 20

puts "\ufa19 (U+fa19)"
puts "NFD normalized => #{"\ufa19".unicode_normalize(:nfd).inspect}"
puts "NFKC normalized => #{"\ufa19".unicode_normalize(:nfkc).inspect}"
puts "nkf convert => #{NKF.nkf('--ic=UTF-8-MAC --oc=UTF-8', "\ufa19").inspect}"

$ ruby nkf.rb 
が : U+304b U+3099
nkf --ic=UTF-8 --oc=Shift_JIS
"\x{82A9}"
か
====================
nkf --ic=UTF-8-MAC --oc=Shift_JIS
"\x{82AA}"
が
====================
神 (U+fa19)
NFD normalized => "\u795E"
NFKC normalized => "\u795E"
nkf convert => "\uFA19"

require 'nkf'
puts "\u339d : U+339d"
cm_to_sjis_from_utf8 = NKF.nkf('--ic=UTF-8 --oc=Shift_JIS --no-cp932ext', "\u339d")
puts cm_to_sjis_from_utf8.inspect
puts cm_to_sjis_from_utf8.encode('UTF-8').inspect
puts "=" * 20

$ ruby nkf.rb
㎝ : U+339d
""
""
====================

# iconv.rbとして保存
require 'open3'

puts "\u304c (U+304c)"
puts "String#encode('Shift_JIS') => #{"\u304c".encode('Shift_JIS').inspect}"
Open3.popen2e('iconv --from-code=UTF-8 --to-code=SHIFT-JIS') do |stdin, stdout_e, _|
  stdin.print "\u304c"
  stdin.close
  result = stdout_e.read
  puts "Convert to Shift_JIS by iconv => #{result.inspect}"
  puts "Re-convert to UTF-8 => #{result.force_encoding('Shift_JIS').encode('UTF-8')}"
end

puts "=" * 20

puts "\u304b\u3099 (U+304b U+3099)"
puts "String#encode('Shift_JIS', undef: :replace) => #{"\u304b\u3099".encode('Shift_JIS', undef: :replace).inspect}"
Open3.popen2e('iconv --from-code=UTF-8 --to-code=SHIFT-JIS') do |stdin, stdout_e, _|
  stdin.print "\u304b\u3099"
  stdin.close
  result = stdout_e.read
  puts "Convert to Shift_JIS by iconv => #{result.inspect}"
  puts "Re-convert to UTF-8 => #{result.force_encoding('Shift_JIS').encode('UTF-8')}"
end

puts "=" * 20

puts "\u0063\u006d (U+0063 U+006d)"
puts "String#encode('Shift_JIS') => #{"\u0063\u006d".encode('Shift_JIS').inspect}"
Open3.popen2e('iconv --from-code=UTF-8 --to-code=SHIFT-JIS') do |stdin, stdout_e, _|
  stdin.print "\u0063\u006d"
  stdin.close
  result = stdout_e.read
  puts "Convert to Shift_JIS by iconv => #{result.inspect}"
  puts "Re-convert to UTF-8 => #{result.force_encoding('Shift_JIS').encode('UTF-8')}"
end

puts "=" * 20

puts "\u339d (U+339d)"
puts "String#encode('Shift_JIS', undef: :replace) => #{"\u339d".encode('Shift_JIS', undef: :replace).inspect}"
Open3.popen2e('iconv --from-code=UTF-8 --to-code=SHIFT-JIS') do |stdin, stdout_e, _|
  stdin.print "\u339d"
  stdin.close
  result = stdout_e.read
  puts "Convert to Shift_JIS by iconv => #{result.inspect}"
  puts "Re-convert to UTF-8 => #{result.force_encoding('Shift_JIS').encode('UTF-8')}"
end

Open3.popen2e('iconv --from-code=UTF-8 --to-code=SHIFTJISX0213') do |stdin, stdout_e, _|
  stdin.print "\u339d"
  stdin.close
  result = stdout_e.read
  puts "Convert to ShiftJISX0213 by iconv => #{result.inspect}"
  puts "Re-convert to UTF-8 => #{result.force_encoding('CP932').encode('UTF-8')}"
end

$ bundle exec ruby iconv.rb
が (U+304c)
String#encode('Shift_JIS') => "\x{82AA}"
Convert to Shift_JIS by iconv => "\x82\xAA"
Re-convert to UTF-8 => が
====================
が (U+304b U+3099)
String#encode('Shift_JIS', undef: :replace) => "\x{82A9}?"
Convert to Shift_JIS by iconv => "\x82\xA9iconv: illegal input sequence at position 3\n"
Re-convert to UTF-8 => かiconv: illegal input sequence at position 3
====================
cm (U+0063 U+006d)
String#encode('Shift_JIS') => "cm"
Convert to Shift_JIS by iconv => "cm"
Re-convert to UTF-8 => cm
====================
㎝ (U+339d)
String#encode('Shift_JIS', undef: :replace) => "?"
Convert to Shift_JIS by iconv => "iconv: illegal input sequence at position 0\n"
Re-convert to UTF-8 => iconv: illegal input sequence at position 0
Convert to ShiftJISX0213 by iconv => "\x87p"
Re-convert to UTF-8 => ㎝

require 'open3'

puts "\u304c (U+304c)"
puts "String#encode('Shift_JIS') => #{"\u304c".encode('Shift_JIS').inspect}"
Open3.popen2e('uconv --from-code UTF-8 --to-code Shift_JIS -x nfkc') do |stdin, stdout_e, _|
  stdin.print "\u304c"
  stdin.close
  result = stdout_e.read
  puts "Convert to Shift_JIS by uconv => #{result.inspect}"
  puts "Re-convert to UTF-8 => #{result.force_encoding('Shift_JIS').encode('UTF-8')}"
end

puts "=" * 20

puts "\u304b\u3099 (U+304b U+3099)"
puts "String#encode('Shift_JIS', undef: :replace) => #{"\u304b\u3099".encode('Shift_JIS', undef: :replace).inspect}"
Open3.popen2e('uconv --from-code UTF-8 --to-code Shift_JIS -x nfkc') do |stdin, stdout_e, _|
  stdin.print "\u304b\u3099"
  stdin.close
  result = stdout_e.read
  puts "Convert to Shift_JIS by uconv => #{result.inspect}"
  puts "Re-convert to UTF-8 => #{result.force_encoding('Shift_JIS').encode('UTF-8')}"
end

puts "=" * 20

puts "\u0063\u006d (U+0063 U+006d)"
puts "String#encode('Shift_JIS') => #{"\u0063\u006d".encode('Shift_JIS').inspect}"
Open3.popen2e('uconv --from-code UTF-8 --to-code Shift_JIS -x nfkc') do |stdin, stdout_e, _|
  stdin.print "\u0063\u006d"
  stdin.close
  result = stdout_e.read
  puts "Convert to Shift_JIS by uconv => #{result.inspect}"
  puts "Re-convert to UTF-8 => #{result.force_encoding('Shift_JIS').encode('UTF-8')}"
end

puts "=" * 20

puts "\u339d (U+339d)"
puts "String#encode('Shift_JIS', undef: :replace) => #{"\u339d".encode('Shift_JIS', undef: :replace).inspect}"
Open3.popen2e('uconv --from-code UTF-8 --to-code Shift_JIS -x nfkc') do |stdin, stdout_e, _|
  stdin.print "\u339d"
  stdin.close
  result = stdout_e.read
  puts "Convert to Shift_JIS by uconv => #{result.inspect}"
  puts "Re-convert to UTF-8 => #{result.force_encoding('Shift_JIS').encode('UTF-8').inspect}"
  puts "codepoints => #{result.codepoints}"
end

Open3.popen2e('uconv --from-code UTF-8 --to-code cp932') do |stdin, stdout_e, _|
  stdin.print "\u339d"
  stdin.close
  result = stdout_e.read
  puts "Convert to CP932 by uconv => #{result.inspect}"
  puts "Re-convert to UTF-8 => #{result.force_encoding('CP932').encode('UTF-8')}"
  puts "codepoints => #{result.codepoints}"
end

$ bundle exec ruby uconv.rb
が (U+304c)
String#encode('Shift_JIS') => "\x{82AA}"
Convert to Shift_JIS by uconv => "\x82\xAA"
Re-convert to UTF-8 => が
====================
が (U+304b U+3099)
String#encode('Shift_JIS', undef: :replace) => "\x{82A9}?"
Convert to Shift_JIS by uconv => "\x82\xAA"
Re-convert to UTF-8 => が
====================
cm (U+0063 U+006d)
String#encode('Shift_JIS') => "cm"
Convert to Shift_JIS by uconv => "cm"
Re-convert to UTF-8 => cm
====================
㎝ (U+339d)
String#encode('Shift_JIS', undef: :replace) => "?"
Convert to Shift_JIS by uconv => "cm"
Re-convert to UTF-8 => "cm"
codepoints => [99, 109]
Convert to CP932 by uconv => "\x87p"
Re-convert to UTF-8 => ㎝
codepoints => [34672]

$ echo おはようございます | uconv -x '::hiragana-latin;'
ohayougozaimasu

FROM ruby:2.7.0-buster
ADD https://github.com/coord-e/magicpak/releases/latest/download/magicpak-x86_64-unknown-linux-musl /usr/bin/magicpak
RUN chmod +x /usr/bin/magicpak
RUN /usr/bin/magicpak -v $(which ruby) /bundle

Sending build context to Docker daemon   2.09MB
Step 1/4 : FROM ruby:2.7.0-buster as ruby
 ---> ea1d77821a3c
Step 2/4 : ADD https://github.com/coord-e/magicpak/releases/latest/download/magicpak-x86_64-unknown-linux-musl /usr/bin/magicpak
Downloading [==================================================>]  4.222MB/4.222MB
 ---> bd6ae35e14fe
Step 3/4 : RUN chmod +x /usr/bin/magicpak
 ---> Running in e75094fba6fd
Removing intermediate container e75094fba6fd
 ---> 8280a91988f3
Step 4/4 : RUN /usr/bin/magicpak -v $(which ruby) /bundle
 ---> Running in 818a39c7466f
[INFO] exe: loading /usr/local/bin/ruby
[INFO] action: bundle shared object dependencies of /usr/local/bin/ruby
[INFO] exe: loading /usr/local/lib/libruby.so.2.7

################ snip #############################

[INFO] exe: using default interpreter /lib64/ld-linux-x86-64.so.2
[INFO] action: bundle executable /usr/local/bin/ruby as None
[INFO] action: emit /bundle
[INFO] action: emit: creating /bundle as it does not exist
[INFO] emit: link /lib/x86_64-linux-gnu/libpthread-2.28.so => /bundle/lib/x86_64-linux-gnu/libpthread.so.0
[INFO] emit: copy /lib/x86_64-linux-gnu/libpthread-2.28.so => /bundle/lib/x86_64-linux-gnu/libpthread-2.28.so
[INFO] emit: link /usr/local/lib/libruby.so.2.7.0 => /bundle/usr/local/lib/libruby.so.2.7
[INFO] emit: copy /usr/local/lib/libruby.so.2.7.0 => /bundle/usr/local/lib/libruby.so.2.7.0
[INFO] emit: link /lib/x86_64-linux-gnu/libdl-2.28.so => /bundle/lib/x86_64-linux-gnu/libdl.so.2
[INFO] emit: copy /lib/x86_64-linux-gnu/libdl-2.28.so => /bundle/lib/x86_64-linux-gnu/libdl-2.28.so
[INFO] emit: link /lib/x86_64-linux-gnu/libm-2.28.so => /bundle/lib/x86_64-linux-gnu/libm.so.6
[INFO] emit: copy /lib/x86_64-linux-gnu/libm-2.28.so => /bundle/lib/x86_64-linux-gnu/libm-2.28.so
[INFO] emit: link /lib/x86_64-linux-gnu/ld-2.28.so => /bundle/lib64/ld-linux-x86-64.so.2
[INFO] emit: copy /lib/x86_64-linux-gnu/ld-2.28.so => /bundle/lib/x86_64-linux-gnu/ld-2.28.so
[INFO] emit: link /lib/x86_64-linux-gnu/libz.so.1.2.11 => /bundle/lib/x86_64-linux-gnu/libz.so.1
[INFO] emit: copy /lib/x86_64-linux-gnu/libz.so.1.2.11 => /bundle/lib/x86_64-linux-gnu/libz.so.1.2.11
[INFO] emit: link /lib/x86_64-linux-gnu/libcrypt-2.28.so => /bundle/lib/x86_64-linux-gnu/libcrypt.so.1
[INFO] emit: copy /lib/x86_64-linux-gnu/libcrypt-2.28.so => /bundle/lib/x86_64-linux-gnu/libcrypt-2.28.so
[INFO] emit: link /lib/x86_64-linux-gnu/librt-2.28.so => /bundle/lib/x86_64-linux-gnu/librt.so.1
[INFO] emit: copy /lib/x86_64-linux-gnu/librt-2.28.so => /bundle/lib/x86_64-linux-gnu/librt-2.28.so
[INFO] emit: link /usr/lib/x86_64-linux-gnu/libgmp.so.10.3.2 => /bundle/usr/lib/x86_64-linux-gnu/libgmp.so.10
[INFO] emit: copy /usr/lib/x86_64-linux-gnu/libgmp.so.10.3.2 => /bundle/usr/lib/x86_64-linux-gnu/libgmp.so.10.3.2
[INFO] emit: copy /usr/local/bin/ruby => /bundle/usr/local/bin/ruby
[INFO] emit: link /lib/x86_64-linux-gnu/libc-2.28.so => /bundle/lib/x86_64-linux-gnu/libc.so.6
[INFO] emit: copy /lib/x86_64-linux-gnu/libc-2.28.so => /bundle/lib/x86_64-linux-gnu/libc-2.28.so
Removing intermediate container 818a39c7466f
 ---> 077d681487ae
Successfully built 077d681487ae

FROM ruby:2.7.0-buster as ruby

ADD https://github.com/coord-e/magicpak/releases/latest/download/magicpak-x86_64-unknown-linux-musl /usr/bin/magicpak
RUN chmod +x /usr/bin/magicpak
RUN /usr/bin/magicpak -v $(which ruby) /bundle

FROM gcr.io/distroless/base-debian10

COPY --from=ruby /bundle /.
RUN ["/usr/local/bin/ruby", "-v"]
RUN ["/usr/local/bin/gem", "install", "sinatra"]

# ...snip...
Step 5/8 : FROM gcr.io/distroless/base-debian10
 ---> 5bb0e81ff6e4
Step 6/8 : COPY --from=ruby /bundle /.
 ---> f2a8875bdfdc
Step 7/8 : RUN ["/usr/local/bin/ruby", "-v"]
 ---> Running in 2cce67b240b1
ruby 2.7.0p0 (2019-12-25 revision 647ee6f091) [x86_64-linux]
Removing intermediate container 2cce67b240b1
 ---> 145cba6957e9
Step 8/8 : RUN ["/usr/local/bin/gem", "install", "sinatra"]
 ---> Running in e445421dbc07
OCI runtime create failed: container_linux.go:349: starting container process caused "exec: \"/usr/local/bin/gem\": stat /usr/local/bin/gem: no such file or directory": unknown

FROM ruby:2.7.0-buster as ruby

ADD https://github.com/coord-e/magicpak/releases/latest/download/magicpak-x86_64-unknown-linux-musl /usr/bin/magicpak
RUN chmod +x /usr/bin/magicpak
RUN /usr/bin/magicpak -v $(which ruby) /bundle

FROM gcr.io/distroless/base-debian10

COPY --from=ruby /bundle /.
COPY --from=ruby /usr/local/bin/ /usr/local/bin # ここを追加
RUN ["/usr/local/bin/ruby", "-v"]
RUN ["/usr/local/bin/gem", "install", "sinatra"]

Step 9/9 : RUN ["/usr/local/bin/gem", "install", "sinatra"]
 ---> Running in e638dbdb65fd
<internal:gem_prelude>:1:in `require': cannot load such file -- rubygems.rb (LoadError)
        from <internal:gem_prelude>:1:in `<internal:gem_prelude>'
The command '/usr/local/bin/gem install sinatra' returned a non-zero code: 1

FROM ruby:2.7.0-buster as ruby

ADD https://github.com/coord-e/magicpak/releases/latest/download/magicpak-x86_64-unknown-linux-musl /usr/bin/magicpak
RUN chmod +x /usr/bin/magicpak
RUN /usr/bin/magicpak -v $(which ruby) /bundle

FROM gcr.io/distroless/base-debian10

COPY --from=ruby /bundle /.
COPY --from=ruby /usr/local/bin/ /usr/local/bin
COPY --from=ruby /usr/local/lib/ruby/ /usr/local/lib/ruby # ここを追加
RUN ["/usr/local/bin/ruby", "-v"]
RUN ["/usr/local/bin/gem", "install", "sinatra"]

Step 10/10 : RUN ["/usr/local/bin/gem", "install", "sinatra"]
 ---> Running in 888f7427612a
/usr/local/lib/ruby/2.7.0/yaml.rb:3: warning: It seems your ruby installation is missing psych (for YAML output).
To eliminate this warning, please install libyaml and reinstall your ruby.
/usr/local/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:92:in `require': libyaml-0.so.2: cannot open shared object file: No such file or directory - /usr/local/lib/ruby/2.7.0/x86_64-linux/psych.so (LoadError)

root@4033859f93d6:/# ./magicpak -v /usr/local/bin/gem /bundle
[INFO] exe: loading /usr/local/bin/gem
[ERROR] error: The executable is malformed: unknown magic number: 7795575320214446371

FROM ruby:2.7.0-buster as ruby

ADD https://github.com/coord-e/magicpak/releases/latest/download/magicpak-x86_64-unknown-linux-musl /usr/bin/magicpak
RUN chmod +x /usr/bin/magicpak
RUN /usr/bin/magicpak -v $(which ruby) /bundle

FROM gcr.io/distroless/base-debian10

COPY --from=ruby /bundle /.
COPY --from=ruby /usr/lib/x86_64-linux-gnu/libyaml* /usr/lib/x86_64-linux-gnu/ # ここを追加
COPY --from=ruby /usr/local/bin/ /usr/local/bin
COPY --from=ruby /usr/local/lib/ruby/ /usr/local/lib/ruby
RUN ["/usr/local/bin/ruby", "-v"]
RUN ["/usr/local/bin/gem", "install", "sinatra"]

6 gems installed
Removing intermediate container 1a7823880c0d
 ---> 680de9256898
Successfully built 680de9256898
Successfully tagged unasuke/distroless-ruby:2.7.0-buster

auto connect:i:1
full address:s:ec2-192-0-2-1.ap-northeast-1.compute.amazonaws.com
username:s:Administrator