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# frozen_string_literal: true
module Bundler
class Injector
def self.inject(new_deps, options = {})
injector = new(new_deps, options)
injector.inject(Bundler.default_gemfile, Bundler.default_lockfile)
end
def self.remove(gems, options = {})
injector = new(gems, options)
injector.remove(Bundler.default_gemfile, Bundler.default_lockfile)
end
def initialize(new_deps, options = {})
@new_deps = new_deps
@options = options
end
# @param [Pathname] gemfile_path The Gemfile in which to inject the new dependency.
# @param [Pathname] lockfile_path The lockfile in which to inject the new dependency.
# @return [Array]
def inject(gemfile_path, lockfile_path)
if Bundler.frozen_bundle?
# ensure the lock and Gemfile are synced
Bundler.definition.ensure_equivalent_gemfile_and_lockfile(true)
end
# temporarily unfreeze
Bundler.settings.temporary(:deployment => false, :frozen => false) do
# evaluate the Gemfile we have now
builder = Dsl.new
builder.eval_gemfile(gemfile_path)
# don't inject any gems that are already in the Gemfile
@new_deps -= builder.dependencies
# add new deps to the end of the in-memory Gemfile
# Set conservative versioning to false because
# we want to let the resolver resolve the version first
builder.eval_gemfile("injected gems", build_gem_lines(false)) if @new_deps.any?
# resolve to see if the new deps broke anything
@definition = builder.to_definition(lockfile_path, {})
@definition.resolve_remotely!
# since nothing broke, we can add those gems to the gemfile
append_to(gemfile_path, build_gem_lines(@options[:conservative_versioning])) if @new_deps.any?
# since we resolved successfully, write out the lockfile
@definition.lock(Bundler.default_lockfile)
# invalidate the cached Bundler.definition
Bundler.reset_paths!
# return an array of the deps that we added
@new_deps
end
end
# @param [Pathname] gemfile_path The Gemfile from which to remove dependencies.
# @param [Pathname] lockfile_path The lockfile from which to remove dependencies.
# @return [Array]
def remove(gemfile_path, lockfile_path)
builder = Dsl.new
builder.eval_gemfile(Bundler.default_gemfile)
removed_deps = remove_gems_from_dependencies(builder, @new_deps)
@definition = builder.to_definition(lockfile_path, {})
remove_gems_from_gemfile(@new_deps, gemfile_path)
# write out the lockfile
@definition.lock(lockfile_path)
# return removed deps
removed_deps
end
private
def conservative_version(spec)
version = spec.version
return ">= 0" if version.nil?
segments = version.segments
seg_end_index = version >= Gem::Version.new("1.0") ? 1 : 2
prerelease_suffix = version.to_s.gsub(version.release.to_s, "") if version.prerelease?
"#{version_prefix}#{segments[0..seg_end_index].join(".")}#{prerelease_suffix}"
end
def version_prefix
if @options[:strict]
"= "
elsif @options[:optimistic]
">= "
else
"~> "
end
end
def build_gem_lines(conservative_versioning)
@new_deps.map do |d|
name = d.name.dump
requirement = if conservative_versioning
", \"#{conservative_version(@definition.specs[d.name][0])}\""
else
", #{d.requirement.as_list.map(&:dump).join(", ")}"
end
if d.groups != Array(:default)
group = d.groups.size == 1 ? ", :group => #{d.groups.inspect}" : ", :groups => #{d.groups.inspect}"
end
source = ", :source => \"#{d.source}\"" unless d.source.nil?
%(gem #{name}#{requirement}#{group}#{source})
end.join("\n")
end
def append_to(gemfile_path, new_gem_lines)
gemfile_path.open("a") do |f|
f.puts
f.puts new_gem_lines
end
end
def remove_gems_from_dependencies(builder, gems)
removed_deps = []
gems.each do |gem_name|
deleted_dep = builder.dependencies.find {|d| d.name == gem_name }
if deleted_dep.nil?
raise GemfileError, "You cannot remove a gem which not specified in Gemfile.\n" \
"`#{gem_name}` is not specified in Gemfile so not removed."
end
builder.dependencies.delete(deleted_dep)
removed_deps << deleted_dep
end
removed_deps
end
def remove_gems_from_gemfile(gems, gemfile_path)
# store patterns of all gems to be removed
patterns = /gem\s+['"]#{Regexp.union(gems)}['"]|gem\(['"]#{Regexp.union(gems)}['"]\)/
new_gemfile = IO.readlines(gemfile_path).reject {|line| line.match(patterns) }
# remove lone \n and append them with other strings
new_gemfile.each_with_index do |_line, index|
if new_gemfile[index + 1] == "\n"
new_gemfile[index] += new_gemfile[index + 1]
new_gemfile.delete_at(index + 1)
end
end
# remove any empty (and nested) blocks
%w[group source env install_if].each {|block| remove_nested_blocks(new_gemfile, block) }
# write the new gemfile
SharedHelpers.filesystem_access(gemfile_path) {|g| File.open(g, "w") {|file| file.puts new_gemfile.join.chomp } }
end
def remove_nested_blocks(gemfile, block_name)
nested_blocks = 0
# count number of nested groups
gemfile.each_with_index {|line, index| nested_blocks += 1 if !gemfile[index + 1].nil? && gemfile[index + 1].include?(block_name) && line.include?(block_name) }
while nested_blocks >= 0
nested_blocks -= 1
gemfile.each_with_index do |line, index|
next if line !~ /#{block_name}/
if gemfile[index + 1] =~ /^\s*end\s*$/
gemfile[index] = nil
gemfile[index + 1] = nil
end
end
# remove nil elements
gemfile.reject!(&:nil?)
end
end
end
end
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