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Copy pathsnapshot.lua
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276 lines (241 loc) · 8.28 KB
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-- This file is a port of the snapshot management logic from the original OpenCode
---@see https://github.com/sst/opencode/blob/dev/packages/opencode/src/snapshot/index.ts
local M = {}
local state = require('opencode.state')
local util = require('opencode.util')
local config_file = require('opencode.config_file')
local session = require('opencode.session')
---@param cmd_args string[]
---@param opts? vim.SystemOpts
---@return string|nil, string|nil
local function snapshot_git(cmd_args, opts)
local snapshot_dir = config_file.get_workspace_snapshot_path():wait()
if not snapshot_dir then
vim.notify('No snapshot path for the active session.')
return nil, nil
end
local args = { 'git', '-C', snapshot_dir }
vim.list_extend(args, cmd_args)
local result = vim.system(args, opts or {}):wait()
if result and result.code == 0 then
return vim.trim(result.stdout), nil
else
return nil, result and result.stderr or nil
end
end
local function write_to_temp_file(content)
local temp_file = vim.fn.tempname()
local f = io.open(temp_file, 'w')
if not f then
vim.notify('Failed to open temp file: ' .. temp_file)
return nil
end
f:write(content)
f:close()
return temp_file
end
function M.track()
if not state.active_session then
vim.notify('No active session', vim.log.levels.ERROR)
return nil
end
local snapshot_dir = config_file.get_workspace_snapshot_path():wait()
if not snapshot_dir then
vim.notify('No snapshot path for the active session.')
return nil
end
local _, add_err = snapshot_git({ 'add', '.' })
if add_err then
vim.notify('Failed to add files: ' .. add_err, vim.log.levels.WARN)
end
local hash_output, write_tree_err = snapshot_git({ 'write-tree' })
if not hash_output then
vim.notify('Failed to write tree: ' .. (write_tree_err or 'unknown error'), vim.log.levels.ERROR)
return nil
end
return vim.trim(hash_output)
end
function M.create()
return M.track()
end
function M.save_restore_point(snapshot_id, from_snapshot_id, deleted_files)
if not state.active_session then
vim.notify('No active session', vim.log.levels.ERROR)
return nil
end
local cache_path = session.get_cache_path(state.active_session.id)
local patch_result = M.patch(snapshot_id)
local snapshot = {
id = snapshot_id,
from_snapshot_id = from_snapshot_id or nil,
files = patch_result and patch_result.files or {},
deleted_files = deleted_files or {},
created_at = os.time(),
}
local path = cache_path .. 'snapshots/'
if vim.fn.isdirectory(path) == 0 then
vim.fn.mkdir(path, 'p')
end
local snapshot_file = path .. snapshot_id .. '.json'
local ok, err = pcall(vim.fn.writefile, { vim.json.encode(snapshot) }, snapshot_file)
if not ok then
vim.notify('Failed to write restore point: ' .. err, vim.log.levels.ERROR)
return nil
end
state.event_manager:emit('custom.restore_point.created', { restore_point = snapshot })
return snapshot
end
---@return RestorePoint[]
function M.get_restore_points()
if not state.active_session then
state.restore_points = {}
return {}
end
local cache_path = session.get_cache_path(state.active_session.id)
if not cache_path then
return {}
end
if state.restore_points and #state.restore_points > 0 then
return state.restore_points
end
local restore_points = util.read_json_dir(cache_path .. 'snapshots/') or {}
table.sort(restore_points, function(a, b)
return a.created_at > b.created_at
end)
state.restore_points = restore_points
return state.restore_points
end
---@return OpencodeSnapshotPatch|nil
function M.patch(hash)
if not state.active_session then
vim.notify('No active session', vim.log.levels.ERROR)
return nil
end
local _, add_err = snapshot_git({ 'add', '.' })
if add_err then
vim.notify('Failed to add files: ' .. add_err .. _, vim.log.levels.WARN)
end
local files_output, diff_err = snapshot_git({ 'diff', '--name-only', hash, '--', '.' })
if not files_output then
vim.notify('Failed to get diff: ' .. (diff_err or 'unknown error'), vim.log.levels.ERROR)
return nil
end
local files = {}
local cwd = vim.fn.getcwd()
for line in files_output:gmatch('[^\r\n]+') do
local trimmed = vim.trim(line)
if trimmed ~= '' then
table.insert(files, cwd .. '/' .. trimmed)
end
end
return {
hash = hash,
files = files,
}
end
function M.diff(hash)
if not state.active_session then
vim.notify('No active session', vim.log.levels.ERROR)
return nil
end
local result, err = snapshot_git({ 'diff', hash, '--', '.' })
if not result then
vim.notify('Failed to get diff: ' .. (err or 'unknown error'), vim.log.levels.ERROR)
return nil
end
return vim.trim(result)
end
function M.diff_file(snapshot_id, file_path)
local relative_path = vim.fn.fnamemodify(file_path, ':.')
local file_at_snapshot = snapshot_git({ 'show', snapshot_id .. ':' .. relative_path })
local temp_file = write_to_temp_file(file_at_snapshot or '')
local file_type = vim.fn.fnamemodify(file_path, ':e')
return { left = file_path, right = temp_file, file_type = file_type }
end
function M.revert(snapshot_id)
local restore_point_id = M.create()
local patch_result = M.patch(snapshot_id)
if not patch_result then
vim.notify('Failed to revert snapshot: ' .. snapshot_id, vim.log.levels.ERROR)
return
end
local deleted_files = {}
for _, file in ipairs(patch_result.files) do
local relative_path = file:match('^' .. vim.fn.getcwd() .. '/?(.*)$')
local res, err = snapshot_git({ 'checkout', snapshot_id, '--', relative_path })
if not res then
vim.notify(
'file not found in history, deleting: ' .. file .. ' - ' .. (err or 'unknown error'),
vim.log.levels.WARN
)
vim.fn.delete(file)
table.insert(deleted_files, file)
end
vim.cmd('checktime')
end
M.save_restore_point(restore_point_id, snapshot_id, deleted_files)
return restore_point_id, deleted_files
end
---@param snapshot_id string
---@param file_path string
---@return string|nil, string[]
function M.revert_file(snapshot_id, file_path)
local restore_point_id = M.create()
local relative_path = vim.fn.fnamemodify(file_path, ':.')
local res, err = snapshot_git({ 'checkout', snapshot_id, '--', relative_path })
local deleted_files = {}
if not res then
vim.notify(
'file not found in history, deleting: ' .. file_path .. ' - ' .. (err or 'unknown error'),
vim.log.levels.WARN
)
vim.fn.delete(file_path)
table.insert(deleted_files, file_path)
end
vim.cmd('checktime')
M.save_restore_point(restore_point_id, snapshot_id, deleted_files)
return restore_point_id, deleted_files
end
---@param snapshot_id string
function M.restore(snapshot_id)
local read_tree_out, read_tree_err = snapshot_git({ 'read-tree', snapshot_id })
if not read_tree_out then
vim.notify('Failed to read-tree: ' .. (read_tree_err or 'unknown error'), vim.log.levels.ERROR)
return
end
local checkout_out, checkout_err = snapshot_git({ 'checkout-index', '-a', '-f' })
if not checkout_out then
vim.notify('Failed to checkout-index: ' .. (checkout_err or 'unknown error'), vim.log.levels.ERROR)
return
end
vim.notify('Restored snapshot: ' .. snapshot_id, vim.log.levels.INFO)
end
function M.restore_file(snapshot_id, file_path)
local read_tree_out, read_tree_err = snapshot_git({ 'read-tree', snapshot_id })
if not read_tree_out then
vim.notify('Failed to read-tree: ' .. (read_tree_err or 'unknown error'), vim.log.levels.ERROR)
return
end
local checkout_out, checkout_err = snapshot_git({ 'checkout-index', '-f', '--', file_path })
if not checkout_out then
vim.notify('Failed to checkout-index: ' .. (checkout_err or 'unknown error'), vim.log.levels.ERROR)
return
end
vim.notify('Restored file: ' .. file_path .. ' from snapshot: ' .. snapshot_id, vim.log.levels.INFO)
end
---@param from_snapshot_id string
---@return RestorePoint[]|nil
function M.get_restore_points_by_parent(from_snapshot_id)
local restore_points = M.get_restore_points()
restore_points = vim.tbl_filter(function(item)
return item.from_snapshot_id == from_snapshot_id
end, restore_points)
table.sort(restore_points, function(a, b)
return a.created_at > b.created_at
end)
if #restore_points == 0 then
return nil
end
return restore_points
end
return M