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#!/usr/bin/lua
local args = require "pl.lapp" [[
Generates activity chart
	-f  (string default 'ansi')    Output format of the chart
	-y  (optional number)          Generate yearly chart for selected year
	-A... (optional string)        Author e-mail addresses to include in chart
	-C... (optional string)        Committer e-mail addresses to include in chart
	<repos...>  (optional string)  Paths to repositories with activity

By default, tool will generate a rolling chart for selected repositories. If no
repositories were selected, current working directory will be tried.
]]
local generators = require "activity.generators"
local git = require "activity.git"
local ok, maybe_format = pcall(require, "activity.formats." .. args.f)
if not ok then
	io.stderr:write(("could not find specified format: %q\n\n"):format(args.f))
	io.stderr:write(maybe_format, "\n")
	os.exit(1)
end
local maybe_year = args.y or "rolling"
if #args.repos < 1 then
	table.insert(args.repos, ".")
end
local filter, by_author, by_committer
if #args.A > 0 then
	by_author = git.any_value_filter("author", args.A)
end
if #args.C > 0 then
	by_committer = git.any_value_filter("committer", args.C)
end
if by_committer and by_author then
	function filter (entry)
		return by_author(entry) or by_committer(entry)
	end
end
filter = filter or by_author or by_committer
local errors, lookup = git.lookup(args.repos, filter)
io.write(generators.generate_table(maybe_year, lookup, maybe_format))
if errors then
	os.exit(1)
end