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|
-- gall.tag
--
-- Git Abstraction Layer for Lua -- Tag object interface
--
-- Copyright 2012 Daniel Silverstone <dsilvers@digital-scurf.org>
--
--
---
-- Tag object interface
--
-- @module gall.tag
local ll = require "gall.ll"
local objs = setmetatable({}, {__mode="k"})
local repos = setmetatable({}, {__mode="k"})
local parsed = setmetatable({}, {__mode="k"})
---
-- Who, when
--
-- Encapsulation of git's author/committer who and when data
--
-- @type whowhen
---
-- The "real" name of the person.
--
-- @field realname
---
-- The email address of the person.
--
-- @field email
---
-- The UNIX time (seconds since epoch) for the signature line
--
-- @field unixtime
---
-- The timezone in which the signature took place (+/-HHHH)
--
-- @field timezone
--- @section end
local function parse_person(pers)
local real, email, when, tz = pers:match("^(.-) <([^>]+)> ([0-9]+) ([+-][0-9]+)$")
return {
realname = real,
email = email,
unixtime = when,
timezone = tz
}
end
local PGP_SIG_START = "-----BEGIN PGP SIGNATURE-----"
local function tagindex(tag, field)
if not parsed[tag] then
local raw = objs[tag].raw
local headers, body, signature = {}, ""
local state = "headers"
for l in raw:gmatch("([^\n]*)\n") do
if state == "headers" then
local first, second = l:match("^([^ ]+) (.+)$")
if first then
assert(not headers[first])
headers[first] = { second }
else
state = "message"
end
elseif state == "message" then
if l == PGP_SIG_START then
signature = l .. "\n"
state = "signature"
else
body = body .. l .. "\n"
end
else
signature = signature .. l .. "\n"
end
end
-- there's always one object
rawset(tag, "object", repos[tag]:get(headers.object[1]))
-- Always one type
rawset(tag, "type", headers.type[1])
-- Always one tag name
rawset(tag, "tag", headers.tag[1])
-- Always one tagger
rawset(tag, "tagger", parse_person(headers.tagger[1]))
-- A message
rawset(tag, "message", body)
-- And an optional signature
rawset(tag, "signature", signature)
-- Promote the SHA
rawset(tag, "sha", objs[tag].sha)
-- Signal we are parsed
parsed[tag] = true
end
return rawget(tag, field)
end
---
-- Encapsulation of a tag object in a Git repository
--
-- @type tag
---
-- The object which has been tagged
--
-- @field object
---
-- The type of the tagged object
--
-- @field type
---
-- The tag name itself
--
-- @field tag
---
-- The tagger as a @{whowhen} instance.
--
-- @field tagger
---
-- The tagging message
--
-- @field message
---
-- The signature on the tag (if present)
--
-- @field signature
---
-- The SHA1 OID of the tag
--
-- @field sha
--- @section end
local function tagtostring(tag)
return "<GitTag(" .. tostring(objs[tag].sha) .. ") in " .. tostring(repos[tag]) .. ">"
end
local tagmeta = {
__index = tagindex,
__tostring = tagtostring
}
---
-- Create a new @{tag} instance to represent a tag object in a repository.
--
-- @function new
-- @tparam repository repo The repository containing the tag object.
-- @tparam object obj The low level git object representing the tag.
-- @treturn tag The tag object representing the tag.
local function _new(repo, obj)
local ret = setmetatable({}, tagmeta)
objs[ret] = obj
repos[ret] = repo
return ret
end
return {
new = _new
}
|
