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|
-- gall.commit
--
-- Git Abstraction Layer for Lua -- Commit object interface
--
-- Copyright 2012 Daniel Silverstone <dsilvers@digital-scurf.org>
--
--
local ll = require "gall.ll"
local objs = setmetatable({}, {__mode="k"})
local repos = setmetatable({}, {__mode="k"})
local parsed = setmetatable({}, {__mode="k"})
local _new
local function parse_person(pers)
local real, email, when, tz = pers:match("^(.-) <([^>]+)> ([0-9]+) ([+-][0-9]+)$")
return {
realname = real,
email = email,
unixtime = when,
timezone = tz
}
end
local function parse_parents(repo, ps)
local ret = {}
for _, psha in ipairs(ps) do
ret[_] = repo:get(psha)
end
return ret
end
local function commitindex(commit, field)
if not parsed[commit] then
local raw = objs[commit].raw
local headers, body, signature = {}, ""
local state = "headers"
for l in raw:gmatch("([^\n]*)\n") do
if state == "headers" then
local first, second = l:match("^([^ ]+) (.+)$")
if first then
if first == "gpgsig" then
signature = second .. "\n"
state = "signature"
else
if headers[first] then
headers[first][#headers[first]+1] = second
else
headers[first] = { second }
end
end
else
state = "message"
end
elseif state == "signature" then
signature = signature .. l:sub(2) .. "\n"
if l:find("END PGP SIG") then
state = "headers"
end
else
body = body .. l .. "\n"
end
end
-- there's always one tree
rawset(commit, "tree", repos[commit]:get(headers.tree[1]))
-- Always one author
rawset(commit, "author", parse_person(headers.author[1]))
-- Always one committer
rawset(commit, "committer", parse_person(headers.committer[1]))
-- Zero or more parents
headers.parent = headers.parent or {}
rawset(commit, "parents", parse_parents(repos[commit], headers.parent))
-- A message
rawset(commit, "message", body)
-- And an optional signature
rawset(commit, "signature", signature)
-- Promote the SHA
rawset(commit, "sha", objs[commit].sha)
-- Signal we are parsed
parsed[commit] = true
end
return rawget(commit, field)
end
local function committostring(commit)
return "<GitCommit(" .. tostring(objs[commit].sha) .. ") in " .. tostring(repos[commit]) .. ">"
end
local commitmeta = {
__index = commitindex,
__tostring = committostring
}
local function _new(repo, obj)
local ret = setmetatable({}, commitmeta)
objs[ret] = obj
repos[ret] = repo
return ret
end
local function _create(repo, data)
if not data.tree then
return nil, "No tree?"
end
if not data.author then
return nil, "No author?"
end
if not data.committer then
return nil, "No committer?"
end
if not data.author.realname then
return nil, "No author name?"
end
if not data.author.email then
return nil, "No author email?"
end
if not data.committer.realname then
return nil, "No committer name?"
end
if not data.committer.email then
return nil, "No committer email?"
end
if not data.message then
return nil, "No message?"
end
if not data.parents then
data.parents = {}
end
-- Construct the commandline and environment
local env = {
GIT_AUTHOR_NAME = data.author.realname,
GIT_AUTHOR_EMAIL = data.author.email,
GIT_COMMITTER_NAME = data.committer.realname,
GIT_COMMITTER_EMAIL = data.committer.email,
}
local cmd = {
"commit-tree", data.tree.sha
}
for i, v in ipairs(data.parents) do
cmd[#cmd+1] = "-p"
cmd[#cmd+1] = v.sha
end
if not data.message:match("\n$") then
data.message = data.message .. "\n"
end
local why, sha = repo:_run_with_input_and_env(env, data.message,
ll.chomp, unpack(cmd))
if why ~= 0 then
return nil, "commit-tree returned " .. tostring(why)
end
return repo:get(sha)
end
return {
create = _create,
new = _new
}
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