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[rubygems/rubygems] Set SOURCE_DATE_EPOCH env var if not provided.

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Fixes #2290.

1. `Gem::Specification.date` returns SOURCE_DATE_EPOCH when defined,
2. this commit makes RubyGems set it _persistently_ when not provided.

This combination means that you can build a gem, check the build time,
and use that value to generate a new build -- and then verify they're
the same.

d830d53f59
This commit is contained in:
Ellen Marie Dash 2019-08-17 04:45:09 +00:00 • committed by Hiroshi SHIBATA
parent 8436b2717c
commit 508afe2c26
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GPG key ID: F9CF13417264FAC2
6 changed files with 82 additions and 6 deletions
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8
lib/rubygems/package/tar_writer.rb
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@ -123,7 +123,7 @@ class Gem::Package::TarWriter
header = Gem::Package::TarHeader.new :name => name, :mode => mode,
:size => size, :prefix => prefix,
:mtime => ENV["SOURCE_DATE_EPOCH"] ? Time.at(ENV["SOURCE_DATE_EPOCH"].to_i).utc : Time.now
:mtime => Gem.source_date_epoch
@io.write header
@io.pos = final_pos
@ -217,7 +217,7 @@ class Gem::Package::TarWriter
header = Gem::Package::TarHeader.new(:name => name, :mode => mode,
:size => size, :prefix => prefix,
:mtime => ENV["SOURCE_DATE_EPOCH"] ? Time.at(ENV["SOURCE_DATE_EPOCH"].to_i).utc : Time.now).to_s
:mtime => Gem.source_date_epoch).to_s
@io.write header
os = BoundedStream.new @io, size
@ -245,7 +245,7 @@ class Gem::Package::TarWriter
:size => 0, :typeflag => "2",
:linkname => target,
:prefix => prefix,
:mtime => ENV["SOURCE_DATE_EPOCH"] ? Time.at(ENV["SOURCE_DATE_EPOCH"].to_i).utc : Time.now).to_s
:mtime => Gem.source_date_epoch).to_s
@io.write header
@ -298,7 +298,7 @@ class Gem::Package::TarWriter
header = Gem::Package::TarHeader.new :name => name, :mode => mode,
:typeflag => "5", :size => 0,
:prefix => prefix,
:mtime => ENV["SOURCE_DATE_EPOCH"] ? Time.at(ENV["SOURCE_DATE_EPOCH"].to_i).utc : Time.now
:mtime => Gem.source_date_epoch
@io.write header