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-- Copyright (c) 2024 Florian Fischer. All rights reserved.
--
-- vis-lockfiles is free software: you can redistribute it and/or modify it under
-- the terms of the GNU General Public License as published by the Free Software
-- Foundation, either version 3 of the License, or (at your option) any later
-- version.
--
-- vis-lockfiles is distributed in the hope that it will be useful, but WITHOUT
-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
-- FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License along with
-- vis-lockfiles found in the LICENSE file.
-- If not, see <https://www.gnu.org/licenses/>.
local source_str = debug.getinfo(1, 'S').source:sub(2)
local script_path = source_str:match('(.*/)')
local lockfiles = dofile(script_path .. 'lockfiles.lua')
local M = {}
M.directory = '${XDG_STATE_HOME:-${HOME}/.local/state}/vis/locks'
M.directory_expanded = nil
local function get_lock_dir()
if M.directory_expanded ~= M.directory then
M.directory = lockfiles.capture_cmd('printf %s "' .. M.directory .. '"')
M.directory_expanded = M.directory
end
return M.directory
end
-- get a user confirmation
-- return true if user wants to edit the locked file
local function prompt(path, lfile_path, pid)
local choices = 'a\ne\nq'
local msg = 'Lock file found!\n\t lock file: "' .. lfile_path .. '"\n\tfile name: ' .. path ..
'\n\tprocess ID: ' .. pid
local menu_prompt = '(E)dit anyway, (Q)uit, [A]bort'
local cmd1 = 'printf >/dev/tty %s \'' .. msg .. '\n\''
local cmd2 = 'printf %s \'' .. choices .. '\''
local cmd3 = 'vis-menu -b -p \'' .. menu_prompt .. '\''
local cmd = cmd1 .. ';' .. cmd2 .. '|' .. cmd3
local status, output = vis:pipe(cmd, true)
vis:redraw()
if status == 0 then
if output:sub(1, 1) == 'e' then
return true
elseif output:sub(1, 1) == 'q' then
vis:exit(1)
end
end
-- else 'abort' or dialog canceled
vis:command('q')
vis:command('new')
end
local created_locks = {}
vis.events.subscribe(vis.events.WIN_OPEN, function(win)
local file = win.file
if created_locks[file.path] or not file.path then
-- either a noname buffer, or already locked by us
return
end
local lfile_path = lockfiles.lock_file_path(get_lock_dir(), file.path)
local lock_pid = lockfiles.create_lock_file(get_lock_dir(), lfile_path)
if lockfiles.vis_pid == lock_pid then
created_locks[file.path] = lfile_path
else
if not prompt(file.path, lfile_path, lock_pid) then
-- return ~= nil to stop further event handling since we closed the window
return true
end
end
end)
vis.events.subscribe(vis.events.FILE_CLOSE, function(file)
if not file.path then
return
end
local lfile_path = created_locks[file.path]
if lfile_path then
lockfiles.delete_lock_file(lfile_path)
created_locks[file.path] = nil
end
end)
vis.events.subscribe(vis.events.QUIT, function()
for _, lfile_path in pairs(created_locks) do
if lfile_path then
lockfiles.delete_lock_file(lfile_path)
end
end
created_locks = {}
end)
return M
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