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# frozen_string_literal: true
module Gitem
class Generator
TEMPLATE_PATH = File.expand_path("index.html", __dir__)
attr_reader :output_dir
def initialize(repo_path, output_dir = nil, base_path = nil)
@repo = Rugged::Repository.new(repo_path)
@output_dir = output_dir || File.join(@repo.path, "srv")
@base_path = base_path
@processed_trees = Set.new
@processed_blobs = Set.new
end
def export!
setup_directories
export_branches
export_tags
export_commits
export_repo_info
copy_template
puts "✓ Generated: #{@output_dir}"
end
private
def setup_directories
%w[commits trees blobs refs/heads refs/tags].each do |dir|
FileUtils.mkdir_p(File.join(@output_dir, dir))
end
end
def copy_template
FileUtils.cp(TEMPLATE_PATH, File.join(@output_dir, "index.html"))
end
def export_repo_info
branch = @repo.branches[default_branch_name]
readme_content, readme_name = extract_readme(branch)
info = {
name: repo_name, default_branch: default_branch_name,
branches_count: local_branches.size, tags_count: @repo.tags.count,
readme: readme_content, readme_name: readme_name, generated_at: Time.now.iso8601
}
info[:base_path] = @base_path if @base_path
write_json("repo.json", info)
end
def repo_name
File.basename(@repo.workdir || @repo.path.chomp("/.git/").chomp(".git"))
end
def default_branch_name
@default_branch_name ||= %w[main master].find { |n| @repo.branches[n] } || local_branches.first&.name || "main"
end
def local_branches
@local_branches ||= @repo.branches.select { |b| b.name && !b.name.include?("/") }
end
def extract_readme(branch)
return [nil, nil] unless branch&.target
tree = branch.target.tree
%w[README.md README.markdown readme.md README.txt README].each do |name|
entry = tree.each.find { |e| e[:name].casecmp?(name) }
next unless entry&.dig(:type) == :blob
blob = @repo.lookup(entry[:oid])
next if blob.binary?
return [blob.content.encode("UTF-8", invalid: :replace, undef: :replace), entry[:name]]
end
[nil, nil]
end
def export_branches
branches = local_branches.filter_map do |branch|
target = branch.target
next unless target
{ name: branch.name, sha: target.oid, is_head: branch.head?,
committed_at: target.committer[:time].iso8601, author: target.author[:name],
message: target.message.lines.first&.strip || "" }
end.sort_by { |b| b[:is_head] ? 0 : 1 }
write_json("branches.json", branches)
branches.each { |b| write_json("refs/heads/#{b[:name]}.json", b) }
end
def export_tags
tags = @repo.tags.filter_map do |tag|
target = tag.target
next unless target
commit = target.is_a?(Rugged::Tag::Annotation) ? target.target : target
{ name: tag.name, sha: commit.oid, annotated: target.is_a?(Rugged::Tag::Annotation),
message: target.is_a?(Rugged::Tag::Annotation) ? target.message : nil,
committed_at: commit.committer[:time].iso8601 }
end.sort_by { |t| t[:committed_at] }.reverse
write_json("tags.json", tags)
tags.each { |t| write_json("refs/tags/#{t[:name]}.json", t) }
end
def export_commits
commits_list = []
walker = Rugged::Walker.new(@repo)
@repo.branches.each { |b| walker.push(b.target.oid) if b.target rescue nil }
walker.sorting(Rugged::SORT_TOPO | Rugged::SORT_DATE)
walker.each_with_index do |commit, idx|
print "\r Processing commits: #{idx + 1}" if ((idx + 1) % 50).zero?
data = extract_commit(commit)
commits_list << data.slice(:sha, :short_sha, :message_headline, :author, :committed_at)
write_json("commits/#{commit.oid}.json", data)
export_tree(commit.tree, "")
end
commits_list.sort_by! { |c| c[:committed_at] }.reverse!
write_json("commits.json", commits_list)
puts "\r Processed #{commits_list.size} commits"
end
def extract_commit(commit)
stats = commit.parents.empty? ? initial_diff_stats(commit) : parent_diff_stats(commit)
{ sha: commit.oid, short_sha: commit.oid[0, 7], message: commit.message,
message_headline: commit.message.lines.first&.strip || "",
author: { name: commit.author[:name], email: commit.author[:email], date: commit.author[:time].iso8601 },
committer: { name: commit.committer[:name], email: commit.committer[:email], date: commit.committer[:time].iso8601 },
committed_at: commit.committer[:time].iso8601,
parents: commit.parents.map { |p| { sha: p.oid, short_sha: p.oid[0, 7] } },
tree_sha: commit.tree.oid, stats: stats[:stats], files: stats[:files] }
end
def initial_diff_stats(commit)
files = []
collect_tree_files(commit.tree, "", files)
{ stats: { additions: files.sum { |f| f[:additions] }, deletions: 0, changed: files.size }, files: files }
end
def collect_tree_files(tree, path, files)
tree.each do |entry|
full_path = path.empty? ? entry[:name] : "#{path}/#{entry[:name]}"
if entry[:type] == :blob
blob = @repo.lookup(entry[:oid])
files << { path: full_path, additions: blob.binary? ? 0 : blob.content.lines.count, deletions: 0, status: "added" }
elsif entry[:type] == :tree
collect_tree_files(@repo.lookup(entry[:oid]), full_path, files)
end
end
end
def parent_diff_stats(commit)
diff = commit.parents.first.diff(commit)
files, additions, deletions = [], 0, 0
diff.each_patch do |patch|
fa, fd = 0, 0
patch.each_hunk { |h| h.each_line { |l| fa += 1 if l.addition?; fd += 1 if l.deletion? } }
additions += fa; deletions += fd
status = { added: "added", deleted: "deleted", renamed: "renamed" }[patch.delta.status] || "modified"
files << { path: patch.delta.new_file[:path], additions: fa, deletions: fd, status: status }
end
{ stats: { additions: additions, deletions: deletions, changed: files.size }, files: files }
end
def export_tree(tree, path)
return if @processed_trees.include?(tree.oid)
@processed_trees.add(tree.oid)
entries = tree.map do |entry|
entry_path = path.empty? ? entry[:name] : "#{path}/#{entry[:name]}"
export_tree(@repo.lookup(entry[:oid]), entry_path) if entry[:type] == :tree
export_blob(entry[:oid], entry_path) if entry[:type] == :blob
{ name: entry[:name], path: entry_path, type: entry[:type].to_s, sha: entry[:oid], mode: entry[:filemode].to_s(8) }
end
write_json("trees/#{tree.oid}.json", { sha: tree.oid, path: path, entries: entries })
end
def export_blob(oid, path)
return if @processed_blobs.include?(oid)
@processed_blobs.add(oid)
blob = @repo.lookup(oid)
content = blob.binary? ? nil : blob.content.encode("UTF-8", invalid: :replace, undef: :replace, replace: "?")
content = "#{content[0, 100_000]}\n... [truncated]" if content && content.size > 100_000
write_json("blobs/#{oid}.json", { sha: oid, path: path, size: blob.size, binary: blob.binary?, content: content, truncated: !blob.binary? && blob.size > 100_000 })
end
def write_json(path, data)
File.write(File.join(@output_dir, path), JSON.generate(data))
end
end
end
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