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--- Module implementing the LuaRocks "remove" command.
-- Uninstalls rocks.
--module("luarocks.remove", package.seeall)
local remove = {}
package.loaded["luarocks.remove"] = remove
local search = require("luarocks.search")
local deps = require("luarocks.deps")
local fetch = require("luarocks.fetch")
local repos = require("luarocks.repos")
local path = require("luarocks.path")
local util = require("luarocks.util")
local cfg = require("luarocks.cfg")
local manif = require("luarocks.manif")
local fs = require("luarocks.fs")
remove.help_summary = "Uninstall a rock."
remove.help_arguments = "[--force[=fast]] <name> [<version>]"
remove.help = [[
Argument is the name of a rock to be uninstalled.
If a version is not given, try to remove all versions at once.
Will only perform the removal if it does not break dependencies.
To override this check and force the removal, use --force.
To perform a forced removal without reporting dependency issues,
use --force=fast.
]]..util.deps_mode_help()
--- Obtain a list of packages that depend on the given set of packages
-- (where all packages of the set are versions of one program).
-- @param name string: the name of a program
-- @param versions array of string: the versions to be deleted.
-- @return array of string: an empty table if no packages depend on any
-- of the given list, or an array of strings in "name/version" format.
local function check_dependents(name, versions, deps_mode)
local dependents = {}
local blacklist = {}
blacklist[name] = {}
for version, _ in pairs(versions) do
blacklist[name][version] = true
end
local local_rocks = {}
local query_all = search.make_query("")
query_all.exact_name = false
search.manifest_search(local_rocks, cfg.rocks_dir, query_all)
local_rocks[name] = nil
for rock_name, rock_versions in pairs(local_rocks) do
for rock_version, _ in pairs(rock_versions) do
local rockspec, err = fetch.load_rockspec(path.rockspec_file(rock_name, rock_version))
if rockspec then
local _, missing = deps.match_deps(rockspec, blacklist, deps_mode)
if missing[name] then
table.insert(dependents, { name = rock_name, version = rock_version })
end
end
end
end
return dependents
end
--- Delete given versions of a program.
-- @param name string: the name of a program
-- @param versions array of string: the versions to be deleted.
-- @return boolean or (nil, string): true on success or nil and an error message.
local function delete_versions(name, versions)
for version, _ in pairs(versions) do
util.printout("Removing "..name.." "..version.."...")
local ok, err = repos.delete_version(name, version)
if not ok then return nil, err end
end
return true
end
function remove.remove_search_results(results, name, deps_mode, force)
local versions = results[name]
local version = next(versions)
local second = next(versions, version)
local dependents = {}
if force ~= "fast" then
util.printout("Checking stability of dependencies on the absence of")
util.printout(name.." "..table.concat(util.keys(versions), ", ").."...")
util.printout()
dependents = check_dependents(name, versions, deps_mode)
end
if #dependents > 0 then
if force then
util.printerr("The following packages may be broken by this forced removal:")
for _, dependent in ipairs(dependents) do
util.printerr(dependent.name.." "..dependent.version)
end
util.printerr()
else
if not second then
util.printerr("Will not remove "..name.." "..version..".")
util.printerr("Removing it would break dependencies for: ")
else
util.printerr("Will not remove installed versions of "..name..".")
util.printerr("Removing them would break dependencies for: ")
end
for _, dependent in ipairs(dependents) do
util.printerr(dependent.name.." "..dependent.version)
end
util.printerr()
util.printerr("Use --force to force removal (warning: this may break modules).")
return nil, "Failed removing."
end
end
local ok, err = delete_versions(name, versions)
if not ok then return nil, err end
ok, err = manif.make_manifest(cfg.rocks_dir, deps_mode)
if not ok then return nil, err end
util.printout("Removal successful.")
return true
end
function remove.remove_other_versions(name, version, force)
local results = {}
search.manifest_search(results, cfg.rocks_dir, { name = name, exact_name = true, constraints = {{ op = "~=", version = version}} })
if results[name] then
return remove.remove_search_results(results, name, cfg.deps_mode, force)
end
return true
end
--- Driver function for the "remove" command.
-- @param name string: name of a rock. If a version is given, refer to
-- a specific version; otherwise, try to remove all versions.
-- @param version string: When passing a package name, a version number
-- may also be given.
-- @return boolean or (nil, string, exitcode): True if removal was
-- successful, nil and an error message otherwise. exitcode is optionally returned.
function remove.run(...)
local flags, name, version = util.parse_flags(...)
if type(name) ~= "string" then
return nil, "Argument missing, see help."
end
local deps_mode = flags["deps-mode"] or cfg.deps_mode
local ok, err = fs.check_command_permissions(flags)
if not ok then return nil, err, cfg.errorcodes.PERMISSIONDENIED end
local rock_type = name:match("%.(rock)$") or name:match("%.(rockspec)$")
local filename = name
if rock_type then
name, version = path.parse_name(filename)
if not name then return nil, "Invalid "..rock_type.." filename: "..filename end
end
local results = {}
search.manifest_search(results, cfg.rocks_dir, search.make_query(name, version))
if not results[name] then
return nil, "Could not find rock '"..name..(version and " "..version or "").."' in "..path.rocks_tree_to_string(cfg.root_dir)
end
return remove.remove_search_results(results, name, deps_mode, flags["force"])
end
return remove
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