Initial commit.

1 files changed, 730 insertions, 0 deletions

diff --git a/lpm.lua b/lpm.lua
new file mode 100644
index 0000000..d0e53e7
--- /dev/null
+++ b/lpm.lua
@@ -0,0 +1,730 @@
+local strict = {}
+strict.defined = {}
+
+-- used to define a global variable
+function global(t)
+  for k, v in pairs(t) do
+    strict.defined[k] = true
+    rawset(_G, k, v)
+  end
+end
+
+function strict.__newindex(t, k, v)
+  error("cannot set undefined variable: " .. k, 2)
+end
+
+function strict.__index(t, k)
+  if not strict.defined[k] then
+    error("cannot get undefined variable: " .. k, 2)
+  end
+end
+
+setmetatable(_G, strict)
+
+
+-- Begin JSON library.
+--
+-- json.lua
+--
+-- Copyright (c) 2020 rxi
+--
+-- Permission is hereby granted, free of charge, to any person obtaining a copy of
+-- this software and associated documentation files (the "Software"), to deal in
+-- the Software without restriction, including without limitation the rights to
+-- use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+-- of the Software, and to permit persons to whom the Software is furnished to do
+-- so, subject to the following conditions:
+--
+-- The above copyright notice and this permission notice shall be included in all
+-- copies or substantial portions of the Software.
+--
+-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+-- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+-- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+-- AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+-- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+-- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+-- SOFTWARE.
+--
+
+local json = { _version = "0.1.2" }
+
+-------------------------------------------------------------------------------
+-- Encode
+-------------------------------------------------------------------------------
+
+local encode
+
+local escape_char_map = {
+  [ "\\" ] = "\\",
+  [ "\"" ] = "\"",
+  [ "\b" ] = "b",
+  [ "\f" ] = "f",
+  [ "\n" ] = "n",
+  [ "\r" ] = "r",
+  [ "\t" ] = "t",
+}
+
+local escape_char_map_inv = { [ "/" ] = "/" }
+for k, v in pairs(escape_char_map) do
+  escape_char_map_inv[v] = k
+end
+
+
+local function escape_char(c)
+  return "\\" .. (escape_char_map[c] or string.format("u%04x", c:byte()))
+end
+
+
+local function encode_nil(val)
+  return "null"
+end
+
+
+local function encode_table(val, stack)
+  local res = {}
+  stack = stack or {}
+
+  -- Circular reference?
+  if stack[val] then error("circular reference") end
+
+  stack[val] = true
+
+  if rawget(val, 1) ~= nil or next(val) == nil then
+    -- Treat as array -- check keys are valid and it is not sparse
+    local n = 0
+    for k in pairs(val) do
+      if type(k) ~= "number" then
+        error("invalid table: mixed or invalid key types")
+      end
+      n = n + 1
+    end
+    if n ~= #val then
+      error("invalid table: sparse array")
+    end
+    -- Encode
+    for i, v in ipairs(val) do
+      table.insert(res, encode(v, stack))
+    end
+    stack[val] = nil
+    return "[" .. table.concat(res, ",") .. "]"
+
+  else
+    -- Treat as an object
+    for k, v in pairs(val) do
+      if type(k) ~= "string" then
+        error("invalid table: mixed or invalid key types")
+      end
+      table.insert(res, encode(k, stack) .. ":" .. encode(v, stack))
+    end
+    stack[val] = nil
+    return "{" .. table.concat(res, ",") .. "}"
+  end
+end
+
+
+local function encode_string(val)
+  return '"' .. val:gsub('[%z\1-\31\\"]', escape_char) .. '"'
+end
+
+
+local function encode_number(val)
+  -- Check for NaN, -inf and inf
+  if val ~= val or val <= -math.huge or val >= math.huge then
+    error("unexpected number value '" .. tostring(val) .. "'")
+  end
+  return string.format("%.14g", val)
+end
+
+
+local type_func_map = {
+  [ "nil"     ] = encode_nil,
+  [ "table"   ] = encode_table,
+  [ "string"  ] = encode_string,
+  [ "number"  ] = encode_number,
+  [ "boolean" ] = tostring,
+}
+
+
+encode = function(val, stack)
+  local t = type(val)
+  local f = type_func_map[t]
+  if f then
+    return f(val, stack)
+  end
+  error("unexpected type '" .. t .. "'")
+end
+
+
+function json.encode(val)
+  return ( encode(val) )
+end
+
+
+-------------------------------------------------------------------------------
+-- Decode
+-------------------------------------------------------------------------------
+
+local parse
+
+local function create_set(...)
+  local res = {}
+  for i = 1, select("#", ...) do
+    res[ select(i, ...) ] = true
+  end
+  return res
+end
+
+local space_chars   = create_set(" ", "\t", "\r", "\n")
+local delim_chars   = create_set(" ", "\t", "\r", "\n", "]", "}", ",")
+local escape_chars  = create_set("\\", "/", '"', "b", "f", "n", "r", "t", "u")
+local literals      = create_set("true", "false", "null")
+
+local literal_map = {
+  [ "true"  ] = true,
+  [ "false" ] = false,
+  [ "null"  ] = nil,
+}
+
+
+local function next_char(str, idx, set, negate)
+  for i = idx, #str do
+    if set[str:sub(i, i)] ~= negate then
+      return i
+    end
+  end
+  return #str + 1
+end
+
+
+local function decode_error(str, idx, msg)
+  local line_count = 1
+  local col_count = 1
+  for i = 1, idx - 1 do
+    col_count = col_count + 1
+    if str:sub(i, i) == "\n" then
+      line_count = line_count + 1
+      col_count = 1
+    end
+  end
+  error( string.format("%s at line %d col %d", msg, line_count, col_count) )
+end
+
+
+local function codepoint_to_utf8(n)
+  -- http://scripts.sil.org/cms/scripts/page.php?site_id=nrsi&id=iws-appendixa
+  local f = math.floor
+  if n <= 0x7f then
+    return string.char(n)
+  elseif n <= 0x7ff then
+    return string.char(f(n / 64) + 192, n % 64 + 128)
+  elseif n <= 0xffff then
+    return string.char(f(n / 4096) + 224, f(n % 4096 / 64) + 128, n % 64 + 128)
+  elseif n <= 0x10ffff then
+    return string.char(f(n / 262144) + 240, f(n % 262144 / 4096) + 128,
+                       f(n % 4096 / 64) + 128, n % 64 + 128)
+  end
+  error( string.format("invalid unicode codepoint '%x'", n) )
+end
+
+
+local function parse_unicode_escape(s)
+  local n1 = tonumber( s:sub(1, 4),  16 )
+  local n2 = tonumber( s:sub(7, 10), 16 )
+   -- Surrogate pair?
+  if n2 then
+    return codepoint_to_utf8((n1 - 0xd800) * 0x400 + (n2 - 0xdc00) + 0x10000)
+  else
+    return codepoint_to_utf8(n1)
+  end
+end
+
+
+local function parse_string(str, i)
+  local res = ""
+  local j = i + 1
+  local k = j
+
+  while j <= #str do
+    local x = str:byte(j)
+
+    if x < 32 then
+      decode_error(str, j, "control character in string")
+
+    elseif x == 92 then -- `\`: Escape
+      res = res .. str:sub(k, j - 1)
+      j = j + 1
+      local c = str:sub(j, j)
+      if c == "u" then
+        local hex = str:match("^[dD][89aAbB]%x%x\\u%x%x%x%x", j + 1)
+                 or str:match("^%x%x%x%x", j + 1)
+                 or decode_error(str, j - 1, "invalid unicode escape in string")
+        res = res .. parse_unicode_escape(hex)
+        j = j + #hex
+      else
+        if not escape_chars[c] then
+          decode_error(str, j - 1, "invalid escape char '" .. c .. "' in string")
+        end
+        res = res .. escape_char_map_inv[c]
+      end
+      k = j + 1
+
+    elseif x == 34 then -- `"`: End of string
+      res = res .. str:sub(k, j - 1)
+      return res, j + 1
+    end
+
+    j = j + 1
+  end
+
+  decode_error(str, i, "expected closing quote for string")
+end
+
+
+local function parse_number(str, i)
+  local x = next_char(str, i, delim_chars)
+  local s = str:sub(i, x - 1)
+  local n = tonumber(s)
+  if not n then
+    decode_error(str, i, "invalid number '" .. s .. "'")
+  end
+  return n, x
+end
+
+
+local function parse_literal(str, i)
+  local x = next_char(str, i, delim_chars)
+  local word = str:sub(i, x - 1)
+  if not literals[word] then
+    decode_error(str, i, "invalid literal '" .. word .. "'")
+  end
+  return literal_map[word], x
+end
+
+
+local function parse_array(str, i)
+  local res = {}
+  local n = 1
+  i = i + 1
+  while 1 do
+    local x
+    i = next_char(str, i, space_chars, true)
+    -- Empty / end of array?
+    if str:sub(i, i) == "]" then
+      i = i + 1
+      break
+    end
+    -- Read token
+    x, i = parse(str, i)
+    res[n] = x
+    n = n + 1
+    -- Next token
+    i = next_char(str, i, space_chars, true)
+    local chr = str:sub(i, i)
+    i = i + 1
+    if chr == "]" then break end
+    if chr ~= "," then decode_error(str, i, "expected ']' or ','") end
+  end
+  return res, i
+end
+
+
+local function parse_object(str, i)
+  local res = {}
+  i = i + 1
+  while 1 do
+    local key, val
+    i = next_char(str, i, space_chars, true)
+    -- Empty / end of object?
+    if str:sub(i, i) == "}" then
+      i = i + 1
+      break
+    end
+    -- Read key
+    if str:sub(i, i) ~= '"' then
+      decode_error(str, i, "expected string for key")
+    end
+    key, i = parse(str, i)
+    -- Read ':' delimiter
+    i = next_char(str, i, space_chars, true)
+    if str:sub(i, i) ~= ":" then
+      decode_error(str, i, "expected ':' after key")
+    end
+    i = next_char(str, i + 1, space_chars, true)
+    -- Read value
+    val, i = parse(str, i)
+    -- Set
+    res[key] = val
+    -- Next token
+    i = next_char(str, i, space_chars, true)
+    local chr = str:sub(i, i)
+    i = i + 1
+    if chr == "}" then break end
+    if chr ~= "," then decode_error(str, i, "expected '}' or ','") end
+  end
+  return res, i
+end
+
+
+local char_func_map = {
+  [ '"' ] = parse_string,
+  [ "0" ] = parse_number,
+  [ "1" ] = parse_number,
+  [ "2" ] = parse_number,
+  [ "3" ] = parse_number,
+  [ "4" ] = parse_number,
+  [ "5" ] = parse_number,
+  [ "6" ] = parse_number,
+  [ "7" ] = parse_number,
+  [ "8" ] = parse_number,
+  [ "9" ] = parse_number,
+  [ "-" ] = parse_number,
+  [ "t" ] = parse_literal,
+  [ "f" ] = parse_literal,
+  [ "n" ] = parse_literal,
+  [ "[" ] = parse_array,
+  [ "{" ] = parse_object,
+}
+
+
+parse = function(str, idx)
+  local chr = str:sub(idx, idx)
+  local f = char_func_map[chr]
+  if f then
+    return f(str, idx)
+  end
+  decode_error(str, idx, "unexpected character '" .. chr .. "'")
+end
+
+
+function json.decode(str)
+  if type(str) ~= "string" then
+    error("expected argument of type string, got " .. type(str))
+  end
+  local res, idx = parse(str, next_char(str, 1, space_chars, true))
+  idx = next_char(str, idx, space_chars, true)
+  if idx <= #str then
+    decode_error(str, idx, "trailing garbage")
+  end
+  return res
+end
+
+-- End JSON library.
+
+local common = {}
+
+function common.rmrf(root)
+  if not root or root == "" then return end
+  local info = system.stat(root)
+  if not info then return end
+  if info.type == "file" then return os.remove(root) end
+  for i,v in ipairs(system.ls(root)) do common.rmrf(root .. PATHSEP .. v) end
+  system.rmdir(root)
+end
+
+function common.mkdirp(path)
+  local stat = system.stat(path)
+  if stat and stat.type == "dir" then return true end
+  if stat and stat.type == "file" then error("path " .. path .. " exists") end
+  local subdirs = {}
+  while path and path ~= "" do
+    system.mkdir(path)
+    local updir, basedir = path:match("(.*)[/\\](.+)$")
+    table.insert(subdirs, 1, basedir or path)
+    path = updir
+  end
+  for _, dirname in ipairs(subdirs) do
+    path = path and path .. PATHSEP .. dirname or dirname
+    system.mkdir(path)
+  end
+end
+
+
+function common.basename(path)
+  local s = path:reverse():find(PATHSEP)
+  if not s then return path end
+  return path:sub(#path - s + 1)
+end
+
+
+function common.copy(src, dst)
+  local src_stat, dst_stat = system.stat(src), system.stat(dst)
+  if not src_stat then error("can't find " .. src) end
+  if dst_stat and dst_stat.type == "dir" and src_stat.type == "file" then return common.copy(src, dst .. PATHSEP .. common.basename(src)) end
+  if dst_stat then error("path " .. dst .. " exists") end
+  local src_io, dst_io = io.open(src, "rb"), io.write(dst, "wb")
+  while true do
+    local chunk = src_io:read(16*1024)
+    if not chunk then break end
+    dst_io:write(chunk)
+  end
+end
+
+local HOME, USERDIR, CACHEDIR, JSON, repositories
+
+local Repository = {}
+function Repository.__index(self, idx) return rawget(self, idx) or Repository[idx] end
+function Repository.new(hash)
+  if not hash.remote then error("requires a remote") end
+  local self = setmetatable({ 
+    commit = hash.commit,
+    remote = hash.remote, 
+    branch = hash.branch,
+    plugins = nil,
+    local_path = CACHEDIR .. PATHSEP .. system.hash(hash.remote),
+    last_retrieval = nil 
+  }, Repository)
+  if system.stat(self.local_path) and not self.commit and not self.branch then
+    -- In the case where we don't have a branch, and don't have a commit, check for the presence of `master` and `main`.
+    if system.stat(self.local_path .. PATHSEP .. "master") then
+      self.branch = "master"
+    elseif system.stat(self.local_path .. PATHSEP .. PATHSEP .. "main") then
+      self.branch = "main"
+    end
+  end
+  self:parse_manifest()
+  return self
+end
+
+
+function Repository:parse_manifest()
+  if self.manifest then return self.manifest end
+  if system.stat(self.local_path) and system.stat(self.local_path .. PATHSEP .. (self.commit or self.branch)) then
+    self.manifest_path = self.local_path .. PATHSEP .. (self.commit or self.branch) .. PATHSEP .. "manifest.json"
+    if system.stat(self.manifest_path) then 
+      self.manifest = json.parse(io.open(manifest_path, "rb"):read("*all")) 
+      self.plugins = {}
+      for i, metadata in ipairs(self.manifest["plugins"]) do
+        table.insert(self.plugins, Plugin.new(self, metadata))
+      end
+    end
+  end
+  return self.manifest
+end
+
+
+-- in the cases where we don't have a manifest, assume generalized structure, take plugins folder, trawl through it, build manifest that way
+-- assuming each .lua file under 
+function Repository:generate_manifest()
+  
+end
+
+function Repository:add()
+  -- If neither specified then pull onto `master`, and check the main branch name, and move if necessary.
+  if not self.branch and not self.commit then 
+    local path = self.local_path .. PATHSEP .. "master"
+    common.mkdirp(path)
+    system.init(path, self.remote)
+    if not pcall(system.reset, "refs/heads/master") then
+      if pcall(system.reset, "refs/heads/main") then
+        os.rename(path, self.local_path .. PATHSEP .. "main")
+      else
+        error("Can't find master or main.")
+      end
+    end
+  else
+    local path = self.local_path .. PATHSEP .. (self.commit or self.branch)
+    common.mkdirp(path)
+    system.init(path, self.remote)
+    system.fetch(path)
+    system.reset(path, self.commit or ("refs/remotes/origin/" .. self.branch), "hard")
+    self.manifest = nil
+    self:parse_manifest()
+  end
+end
+
+
+function Repository:update()
+  if self.branch then
+    local path = self.local_path .. PATHSEP .. self.branch
+    system.fetch(path)
+    system.reset(path, "refs/remotes/origin/" .. self.branch, "hard")
+    self.manifest = nil
+    self:parse_manifest()
+  end
+end
+
+
+function Repository:remove()
+  common.rmrf(self.path)
+end
+
+
+local Plugin = { __index = function(self, idx) return rawget(self, idx) or Plugin[idx] end }
+function Plugin.new(repository, metadata)
+  return setmetatable(common.merge({
+    repository = repository,
+    tags = {},
+    remote = nil,
+    path = nil,
+    version = "1.0",
+    local_path = repository.local_path .. PATHSEP .. "repo" .. PATHSEP .. (metadata.path or metadata.name),
+    install_path = USERDIR .. PATHSEP .. "plugins" .. PATHSEP .. (metadata.path or metadata.name),
+  }, metadata), Plugin)
+end
+
+function Plugin:install()
+  common.copy(self.local_path, self.install_path)
+end
+
+
+function Plugin:uninstall()
+  common.rmrf(self.install_path)
+end
+
+
+local function get_repository(url)
+  if not url then error("requires a repository url") end
+  for i,v in ipairs(repositories) do
+    if v.url == url then return i, v end
+  end
+  return nil
+end
+
+
+local function match_version(version, pattern)
+  return not pattern or version == pattern
+end
+
+
+local function get_plugin(name, version)
+  local candidates = {}
+  for i,repo in ipairs(repositories) do
+    for j,plugin in ipairs(repo.plugins) do
+      if match_version(plugin.version, version) then
+        table.insert(candidates, plugin)
+      end
+    end
+  end
+  return table.unpack(table.sort(candidates, function (a,b) return a.version < b.version end))
+end
+
+
+local function lpm_add(url)
+  local idx, repo = get_repository(url)
+  if repo then -- if we're alreayd a repo, put this at the head of the resolution list
+    table.remove(repositories, idx)
+  else
+    repo = Repository.new(url):add()
+  end
+  table.insert(repositories, 1, repo)
+  repo:update()
+end
+
+
+local function lpm_rm(url)
+  local idx, repo = get_repository(url)
+  if not repo then error("cannot find repository " .. url) end
+  table.remove(repositories, idx)
+  repo:remove()
+end
+
+
+local function lpm_update(url)
+  local repo = url and get_repository(url)
+  for i,v in ipairs(repositories) do if not repo or v == repo then v:update() end end
+end
+
+
+local function lpm_install(name, version)
+  local plugin = get_plugin(name, version)
+  if not plugin then error("can't find plugin " .. name) end
+  plugin:install()
+end
+
+
+local function lpm_uninstall(name)
+  local plugin = get_plugin(name, version)
+  if not plugin then error("can't find plugin " .. name) end
+  if not plugin.installed then error("plugin " .. name .. " not installed") end
+  plugin:uninstall()
+end
+
+
+local function lpm_list() 
+  local result = { plugins = { } }
+  for i,repo in ipairs(repositories) do
+    if not repo.plugins then error("can't find plugins for repo " .. repo.remote .. ":" .. (repo.commit or repo.branch or "master")) end
+    for j,plugin in ipairs(repo.plugins) do
+      table.insert(result.plugins, plugin)
+    end
+  end
+  if JSON then
+    io.stdout:write(json.encode(result))
+  else
+    
+  end
+end
+
+
+local function lpm_purge()
+  common.rmrf(CACHEDIR)
+end
+
+
+local status = 0
+xpcall(function()
+  JSON = os.getenv("LPM_JSON")
+  HOME = (os.getenv("USERPROFILE") or os.getenv("HOME")):gsub(PATHSEP .. "$", "")
+  USERDIR = os.getenv("LITE_USERDIR") or (os.getenv("XDG_CONFIG_HOME") and os.getenv("XDG_CONFIG_HOME") .. PATHSEP .. "lite-xl")
+       or (HOME and (HOME .. PATHSEP .. '.config' .. PATHSEP .. 'lite-xl'))
+  CACHEDIR = os.getenv("LPM_CACHE") or USERDIR .. PATHSEP .. "lpm"
+  repositories = {}
+  repositories = { Repository.new({ remote = "https://github.com/lite-xl/lite-xl-plugins.git", branch = "master" }) }
+  if not system.stat(CACHEDIR) or not system.stat(repositories[1].local_path) then 
+    common.mkdirp(repositories[1].local_path)
+    repositories[1]:add()
+  else
+    for i, remote_hash in ipairs(system.ls(CACHEDIR)) do
+      local remote
+      for j, commit_or_branch in ipairs(system.ls(CACHEDIR .. PATHSEP .. remote_hash)) do
+        if system.stat(CACHEDIR .. PATHSEP .. remote_hash .. PATHSEP  .. commit_or_branch .. PATHSEP .. ".git" .. PATHSEP .."config") then
+          for line in io.lines(CACHEDIR .. PATHSEP .. remote_hash .. PATHSEP  .. commit_or_branch .. PATHSEP .. ".git" .. PATHSEP .."config") do
+            local s,e = line:find("url = ") 
+            if s then remote = line:sub(s+1) break end
+          end
+          if remote then
+            if #commit_or_branch == 40 and not commit_or_branch:find("[^a-z0-9]") then
+              table.insert(repositories, Repository.new({ remote = remote, commit = commit_or_branch }))
+            else
+              table.insert(repositories, Repository.new({ remote = remote, branch = commit_or_branch }))
+            end
+          end
+        end
+      end
+    end
+  end
+
+  if ARGV[2] == "add" then return lpm_add(ARGV[3]) end
+  if ARGV[2] == "rm" then  return lpm_rm(ARGV[3]) end
+  if ARGV[2] == "update" then return lpm_update(ARGV[3]) end
+  if ARGV[2] == "install" then return lpm_install(ARGV[3]) end
+  if ARGV[2] == "uninstall" then return lpm_uninstall(ARGV[3]) end
+  if ARGV[2] == "purge" then return lpm_purge(ARGV[4]) end
+  if ARGV[2] == "list" then return lpm_list() end
+  io.stderr:write([[
+Usage: lpm COMMAND
+
+LPM is a package manager for `lite-xl`, written in C (and packed-in lua).
+
+It has the following commands:
+
+lpm add <repository remote>
+lpm rm <repository remote>
+lpm update [<repository remote>]
+lpm install <plugin name>
+lpm uninstall <plugin name>
+lpm list
+]])
+end, function(err)
+  if JSON then
+    io.stderr:write(json.encode({ error = err, traceback = debug.traceback() }))
+  else
+    io.stderr:write(err .. "\n")
+    io.stderr:write(debug.traceback() .. "\n")
+  end
+  status = -1
+end)
+
+
+return status;