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-rw-r--r--lib/gitlab/git/popen.rb9
-rw-r--r--spec/lib/gitlab/git/popen_spec.rb17
2 files changed, 24 insertions, 2 deletions
diff --git a/lib/gitlab/git/popen.rb b/lib/gitlab/git/popen.rb
index b45da6020ee..d41fe78daa1 100644
--- a/lib/gitlab/git/popen.rb
+++ b/lib/gitlab/git/popen.rb
@@ -7,7 +7,7 @@ module Gitlab
module Popen
FAST_GIT_PROCESS_TIMEOUT = 15.seconds
- def popen(cmd, path, vars = {})
+ def popen(cmd, path, vars = {}, lazy_block: nil)
unless cmd.is_a?(Array)
raise "System commands must be given as an array of strings"
end
@@ -22,7 +22,12 @@ module Gitlab
yield(stdin) if block_given?
stdin.close
- @cmd_output << stdout.read
+ if lazy_block
+ return lazy_block.call(stdout.lazy)
+ else
+ @cmd_output << stdout.read
+ end
+
@cmd_output << stderr.read
@cmd_status = wait_thr.value.exitstatus
end
diff --git a/spec/lib/gitlab/git/popen_spec.rb b/spec/lib/gitlab/git/popen_spec.rb
index 2b65bc1cf15..b033ede9062 100644
--- a/spec/lib/gitlab/git/popen_spec.rb
+++ b/spec/lib/gitlab/git/popen_spec.rb
@@ -53,6 +53,23 @@ describe 'Gitlab::Git::Popen' do
it { expect(status).to be_zero }
it { expect(output).to eq('hello') }
end
+
+ context 'with lazy block' do
+ it 'yields a lazy io' do
+ expect_lazy_io = lambda do |io|
+ expect(io).to be_a Enumerator::Lazy
+ expect(io.inspect).to include('#<IO:fd')
+ end
+
+ klass.new.popen(%w[ls], path, lazy_block: expect_lazy_io)
+ end
+
+ it "doesn't wait for process exit" do
+ Timeout.timeout(2) do
+ klass.new.popen(%w[yes], path, lazy_block: ->(io) {})
+ end
+ end
+ end
end
context 'popen_with_timeout' do