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-- gitinfo-lua-cmd.lua
-- Copyright 2023 E. Nijenhuis
--
-- This work may be distributed and/or modified under the
-- conditions of the LaTeX Project Public License, either version 1.3c
-- of this license or (at your option) any later version.
-- The latest version of this license is in
-- http://www.latex-project.org/lppl.txt
-- and version 1.3c or later is part of all distributions of LaTeX
-- version 2005/12/01 or later.
--
-- This work has the LPPL maintenance status ‘maintained’.
--
-- The Current Maintainer of this work is E. Nijenhuis.
--
-- This work consists of the files gitinfo-lua.sty gitinfo-lua.pdf
-- gitinfo-cmd.lua and gitinfo-lua.lua
local api = {
cwd = nil,
executable = 'git',
default_sort = '',
attribute_separator = '\\pop',
record_separator = '\\end'
}
local cache = {}
function cache:seek(_key)
for key, value in pairs(self) do
if key == _key then
return true, value
end
end
return false, nil
end
function api.trim(s)
return (s:gsub("^%s*(.-)%s*$", "%1"))
end
function api:exec(command, do_caching, target_dir)
local cmd = self.executable .. ' ' .. command
local cwd = target_dir or self.cwd
if cwd then
cmd = 'cd ' .. cwd .. ';' .. cmd
end
if do_caching then
local found, result = cache:seek(cmd)
if found then
return result
end
end
local f = io.popen(cmd)
if f == nil then
return nil, "Couldn't execute git command.\n\tIs option '-shell-escape' turned on?"
end
local s = f:read('*a')
if f:close() then
if do_caching then
cache[cmd] = s
end
return s
else
return nil, 'Error executing git command'
end
end
function api:shortlog(sort_by_contrib, include_email, target_dir)
local cmd = 'shortlog -s'
if sort_by_contrib then
cmd = cmd .. 'n'
end
if include_email then
cmd = cmd .. 'e'
end
cmd = cmd .. ' HEAD'
return self:exec(cmd, true, target_dir)
end
function api:parse_opts(options)
if options then
for idx, opt in ipairs(options) do
options[idx] = '--' .. opt
end
return table.concat(options, ' ')
end
end
function api:format_attribute(attribute, no_separator, with_parenthesis)
if with_parenthesis then
attribute = '%(' .. attribute .. ')'
else
attribute = '%' .. attribute
end
if not no_separator then
attribute = attribute .. self.attribute_separator
end
return attribute
end
function api:_parse_format_spec(spec, idx, with_parenthesis)
local format = ''
local above_limit = #spec + 1
while idx and idx <= #spec do
local attr_idx, attr_size, attr = string.find(spec, '([a-z:]+)', idx)
local if_idx, if_size, if_block, if_then, if_else = string.find(spec, '%((.-)%)%((.-)%)%((.-)%)', idx)
if if_idx or attr_idx then
if (if_idx or above_limit) > (attr_idx or above_limit) then
format = format .. self:format_attribute(attr, false, with_parenthesis)
idx = attr_size and (attr_size + 1)
else
local if_token = self:format_attribute(if_block, true, with_parenthesis)
local then_result = self:_parse_format_spec(if_then, idx, with_parenthesis)
local else_result = self:_parse_format_spec(if_else, idx, with_parenthesis)
format = format .. '%(if)' .. if_token .. '%(then)' .. then_result
format = format .. '%(else)' .. else_result .. '%(end)'
idx = if_size and (if_size + 1)
end
end
end
return format
end
function api:parse_format_spec(spec, with_parenthesis)
if type(spec) ~= 'string' then
return nil, 'Pass the attribute format spec separated by "," in a string en enclosed in three parentheses for if statements'
end
local format = self:_parse_format_spec(spec, 1, with_parenthesis)
return format .. self.record_separator
end
function api:parse_response(buffer)
local results = {}
for record_buffer in string.gmatch(buffer, '(.-)' .. self.record_separator) do
local record = {}
for attr in string.gmatch(record_buffer, '(.-)' .. self.attribute_separator) do
table.insert(record, self.trim(attr))
end
table.insert(results, record)
end
return results
end
function api:log(format_spec, revision, options, target_dir)
local format, err = self:parse_format_spec(format_spec)
if err then
return nil, err
end
local cmd = 'log --pretty=format:"' .. format .. '"'
local opts = self:parse_opts(options)
if opts then
cmd = cmd .. ' ' .. opts
end
if revision and revision ~= '' then
cmd = cmd .. ' ' .. revision
end
local response, err = self:exec(cmd, true, target_dir)
if not response then
return nil, err
end
return self:parse_response(response)
end
function api:for_each_ref(format_spec, revision_type, options, target_dir)
local err, format, response
format, err = self:parse_format_spec(format_spec, true)
if err then return nil, err end
local cmd = 'for-each-ref --format="' .. format .. '"'
local opts = self:parse_opts(options)
if opts then
cmd = cmd .. ' ' .. opts
end
cmd = cmd .. ' ' .. revision_type
response, err = self:exec(cmd, true, target_dir)
if err then return nil, err end
return self:parse_response(response)
end
local gitinfo_cmd = {}
local gitinfo_cmd_mt = {
__index = api,
__newindex = nil
}
setmetatable(gitinfo_cmd, gitinfo_cmd_mt)
return gitinfo_cmd
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