lib/debt_ceiling/source_control_systems/git.rb
module DebtCeiling
module SourceControlSystem
require 'open3'
class Git < Base
register_system
def self.supported?
`git branch 2>&1` && $?.success?
end
def self.to_s
"Git"
end
def revisions_count(path)
revisions_refs(path).count
end
def revisions_refs(path)
popen3("git log --follow --format=%h #{path.shellescape}").split("\n")
end
def date_of_last_commit(path)
popen3("git log -1 --date=iso --format=%ad #{path.shellescape}").chomp!
end
def revision?
head_reference && $?.success?
end
def head_reference
popen3("git rev-parse --verify HEAD").chomp
end
def add_note_to(ref, message)
popen3(%Q(git notes append #{ref} -m "#{message}"))
end
def read_note_on(ref)
popen3("git notes show #{ref}")
end
def travel_to_commit(ref)
stash_successful = stash_changes
current_branch = popen3("git symbolic-ref HEAD").chomp.split('/').last
popen3("git checkout #{ref}")
yield
ensure
popen3("git checkout #{current_branch}")
travel_to_original_state if stash_successful
end
def travel_to_head
stash_successful = stash_changes
yield
ensure
travel_to_original_state if stash_successful
end
private
def stash_changes
stashes_count_before = stashes_count
popen3("git stash")
stashes_count_after = stashes_count
stashes_count_after > stashes_count_before
end
def stashes_count
popen3("git stash list --format=%h").count("\n")
end
def travel_to_original_state
popen3("git stash pop")
end
def popen3(cmd)
Open3.popen3(cmd) do |_,stdout,error|
stdout.read if error.read.empty?
end
end
end
end
end