/usr/bin/smd-translate is in syncmaildir 1.2.6.2-1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 | #!/usr/bin/env lua5.1
--
-- Released under the terms of GPLv3 or at your option any later version.
-- No warranties.
-- Copyright Enrico Tassi <gares@fettunta.org>
-- utils
function normalize(x)
	return x:gsub("^['\"]",''):gsub("['\"]$",''):gsub("/$",'')
end
function escape(x)
	return x:gsub('[]%%%.-]',function(x) return '%'..x end)
end
local orig_print = print
function print(...)
	orig_print(...)
	io.stdout:flush()
end
-- argument parsing
local mode, dir, endpoint
mode = 'default'
local i = 1
while i <= select('#',...) do
	local cur = select(i,...)
	if cur == '-m' then
		i = i + 1
		mode = select(i,...)
	elseif cur == '-d' then
		i = i + 1
		dir = select(i,...)
	else
		if endpoint ~= nil then
			print 'ERROR'
			print 'smd-translate: too many arguments'
			os.exit(1)
		end
		endpoint = cur
	end
	i = i + 1
end
-- argument checking
if endpoint == nil then
	print 'ERROR'
	print('smd-translate: No endpoint specified')
	os.exit(1)
end
if dir ~= 'LR' and dir ~= 'RL' then
	print 'ERROR'
	print('smd-translate: Direction '..(dir or 'nil')..
		' passed with -d is not LR nor R')
	os.exit(1)
end
-- config file parsing
conf=os.getenv'HOME'..'/.smd/config.'..endpoint
conf_f = io.open(conf)
if conf_f == nil then
	print 'ERROR'
	print('smd-translate: No configuration file for endpoint ' ..
		(endpoint or 'nil'))
	os.exit(1)
end
local conf_tbl = {}
for l in conf_f:lines() do
	-- this way we skip comments
	local k,v = l:match('^%s*(%S+)%s*=%s*(%S+)')
	if k ~= nil and v ~= nil then
		conf_tbl[k]=v
	end
end
conf_f:close()
mailbox_local = conf_tbl['MAILBOX_LOCAL'] or conf_tbl['MAILBOX']
mailbox_local = normalize(mailbox_local)
mailbox_remote = conf_tbl['MAILBOX_REMOTE'] or conf_tbl['MAILBOX']
mailbox_remote = normalize(mailbox_remote)
-- modes
modes = {}
modes['oimap-dovecot'] = function(dir)
	if dir == 'LR' then
		local l_ml = '^'..escape(mailbox_local)..'/'
		local r_ml_dot = mailbox_remote..'/.'
		local r_ml = mailbox_remote..'/'
		local mc = mailbox_local..'/cur'
		local mn = mailbox_local..'/new'
		local mt = mailbox_local..'/tmp'
		for l in io.stdin:lines() do
			if l == mc or l == mn or l == mt then
				print((l:gsub(l_ml,r_ml)))
			else
				print((l:gsub(l_ml,r_ml_dot)))
			end
		end
	else
		local e_mr = '^'..escape(mailbox_remote)
		local m_ml = '^'..escape(mailbox_local)..'/%.'
		local dot_ml = mailbox_local..'/'
		for l in io.stdin:lines() do
			print((l:gsub(e_mr,mailbox_local):gsub(m_ml,dot_ml)))
		end
	end
end
modes['nodots'] = function(dir)
	if dir == 'LR' then
		local l_ml = '^'..escape(mailbox_local)..'/'
		local l_mlc = '^'..escape(mailbox_local)..'/(.*)/(cur)'
		local l_mln = '^'..escape(mailbox_local)..'/(.*)/(new)'
		local l_mlt = '^'..escape(mailbox_local)..'/(.*)/(tmp)'
		local r_ml_dot = mailbox_remote..'/.'
		local r_ml = mailbox_remote..'/'
		local mc = mailbox_local..'/cur'
		local mn = mailbox_local..'/new'
		local mt = mailbox_local..'/tmp'
		for l in io.stdin:lines() do
			if l == mc or l == mn or l == mt then
				print((l:gsub(l_ml,r_ml)))
			else
				local f = function(path, last)
					return r_ml_dot..(path:gsub('/','.'))..'/'..last end
				print((l:gsub(l_mlc,f):gsub(l_mln,f):gsub(l_mlt,f)))
			end
		end
	else
		local e_mr = '^'..escape(mailbox_remote)..'(/.*)'
		local dot_ml = mailbox_local
		for l in io.stdin:lines() do
			print((l:gsub(e_mr,function(cap) 
				return dot_ml..(cap:gsub('%.','/'):gsub('^//','/')) end)))
		end
	end
end
modes['move'] = function(dir)
	if dir == 'LR' then
		local l_m = '^'..escape(mailbox_local)..'/'
		local r_m = mailbox_remote..'/'
		for l in io.stdin:lines() do
			print((l:gsub(l_m,r_m)))
		end
	else
		local r_m = '^'..escape(mailbox_remote)..'/'
		local l_m = mailbox_local..'/'
		for l in io.stdin:lines() do
			print((l:gsub(r_m,l_m)))
		end
	end
end
modes['cat'] = function(_) for l in io.stdin:lines() do print(l) end end
modes['default'] = modes['oimap-dovecot']
-- run
modes[mode](dir, f,s,init)
-- vim:set ts=4:
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