%% -*- erlang-indent-level: 4;indent-tabs-mode: nil -*-
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%% ex: ts=4 sw=4 et
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%% -------------------------------------------------------------------
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%%
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%% rebar: Erlang Build Tools
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%%
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%% Copyright (c) 2009 Dave Smith (dizzyd@dizzyd.com)
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%%
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%% Permission is hereby granted, free of charge, to any person obtaining a copy
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%% of this software and associated documentation files (the "Software"), to deal
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%% in the Software without restriction, including without limitation the rights
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%% to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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%% copies of the Software, and to permit persons to whom the Software is
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%% furnished to do so, subject to the following conditions:
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%%
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%% The above copyright notice and this permission notice shall be included in
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%% all copies or substantial portions of the Software.
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%%
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%% THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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%% IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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%% FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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%% AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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%% LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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%% OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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%% THE SOFTWARE.
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%% -------------------------------------------------------------------
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-module(rebar_file_utils).
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-export([try_consult/1,
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consult_config/2,
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consult_config_terms/2,
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format_error/1,
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symlink_or_copy/2,
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rm_rf/1,
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cp_r/2,
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mv/2,
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delete_each/1,
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write_file_if_contents_differ/2,
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write_file_if_contents_differ/3,
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system_tmpdir/0,
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system_tmpdir/1,
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reset_dir/1,
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touch/1,
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path_from_ancestor/2,
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canonical_path/1,
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absolute_path/1,
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normalized_path/1,
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normalize_relative_path/1,
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resolve_link/1,
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split_dirname/1,
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ensure_dir/1]).
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-include("rebar.hrl").
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-include_lib("providers/include/providers.hrl").
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-include_lib("kernel/include/file.hrl").
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%% ===================================================================
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%% Public API
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%% ===================================================================
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try_consult(File) ->
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case file:consult(File) of
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{ok, Terms} ->
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Terms;
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{error, enoent} ->
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[];
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{error, Reason} ->
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throw(?PRV_ERROR({bad_term_file, File, Reason}))
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end.
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%% @doc Parse a sys.config file and return the configuration terms
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%% for all its potentially nested configs.
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-spec consult_config(rebar_state:t(), string()) -> [[tuple()]].
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consult_config(State, Filename) ->
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Fullpath = filename:join(rebar_dir:root_dir(State), Filename),
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?DEBUG("Loading configuration from ~p", [Fullpath]),
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Config = case try_consult(Fullpath) of
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[T] -> T;
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[] -> []
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end,
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consult_config_terms(State, Config).
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%% @doc From a parsed sys.config file, expand all the terms to include
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%% its potential nested configs. It is also possible that no sub-terms
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%% (i.e. the config file does not refer to "some/other/file.config")
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%% that the input term is returned as-is.
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%%
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%% This function is added mostly to help with variable substitution
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%% and evaluation of 'sys.config.src' files, giving a way to handle
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%% expansion that is separate from regular config handling.
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-spec consult_config_terms(rebar_state:t(), [tuple()]) -> [[tuple()]].
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consult_config_terms(State, Config) ->
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JoinedConfig = lists:flatmap(
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fun (SubConfig) when is_list(SubConfig) ->
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case lists:suffix(".config", SubConfig) of
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%% since consult_config returns a list in a list we take the head here
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false -> hd(consult_config(State, SubConfig ++ ".config"));
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true -> hd(consult_config(State, SubConfig))
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end;
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(Entry) -> [Entry]
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end, Config),
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%% Backwards compatibility
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[JoinedConfig].
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format_error({bad_term_file, AppFile, Reason}) ->
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io_lib:format("Error reading file ~ts: ~ts", [AppFile, file:format_error(Reason)]).
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symlink_or_copy(Source, Target) ->
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Link = case os:type() of
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{win32, _} ->
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Source;
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_ ->
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rebar_dir:make_relative_path(Source, Target)
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end,
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case file:make_symlink(Link, Target) of
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ok ->
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ok;
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{error, eexist} ->
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exists;
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{error, _} ->
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case os:type() of
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{win32, _} ->
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S = unicode:characters_to_list(Source),
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T = unicode:characters_to_list(Target),
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case filelib:is_dir(S) of
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true ->
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win32_symlink_or_copy(S, T);
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false ->
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cp_r([S], T)
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end;
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_ ->
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case filelib:is_dir(Target) of
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true ->
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ok;
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false ->
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cp_r([Source], Target)
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end
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end
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end.
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%% @private Compatibility function for windows
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win32_symlink_or_copy(Source, Target) ->
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Res = rebar_utils:sh(
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?FMT("cmd /c mklink /j \"~ts\" \"~ts\"",
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[rebar_utils:escape_double_quotes(filename:nativename(Target)),
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rebar_utils:escape_double_quotes(filename:nativename(Source))]),
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[{use_stdout, false}, return_on_error]),
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case win32_mklink_ok(Res, Target) of
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true -> ok;
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false -> cp_r_win32(Source, drop_last_dir_from_path(Target))
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end.
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%% @private specifically pattern match against the output
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%% of the windows 'mklink' shell call; different values from
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%% what win32_ok/1 handles
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win32_mklink_ok({ok, _}, _) ->
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true;
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win32_mklink_ok({error,{1,"Local NTFS volumes are required to complete the operation.\n"}}, _) ->
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false;
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win32_mklink_ok({error,{1,"Cannot create a file when that file already exists.\n"}}, Target) ->
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% File or dir is already in place; find if it is already a symlink (true) or
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% if it is a directory (copy-required; false)
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is_symlink(Target);
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win32_mklink_ok(_, _) ->
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false.
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%% @private
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is_symlink(Filename) ->
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{ok, Info} = file:read_link_info(Filename),
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Info#file_info.type == symlink.
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%% @private
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%% drops the last 'node' of the filename, presumably the last dir such as 'src'
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%% this is because cp_r_win32/2 automatically adds the dir name, to appease
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%% robocopy and be more uniform with POSIX
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drop_last_dir_from_path([]) ->
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[];
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drop_last_dir_from_path(Path) ->
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case lists:droplast(filename:split(Path)) of
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[] -> [];
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Dirs -> filename:join(Dirs)
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end.
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%% @doc Remove files and directories.
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%% Target is a single filename, directoryname or wildcard expression.
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-spec rm_rf(string()) -> 'ok'.
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rm_rf(Target) ->
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case os:type() of
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{unix, _} ->
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EscTarget = rebar_utils:escape_chars(Target),
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{ok, []} = rebar_utils:sh(?FMT("rm -rf ~ts", [EscTarget]),
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[{use_stdout, false}, abort_on_error]),
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ok;
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{win32, _} ->
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Filelist = filelib:wildcard(Target),
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Dirs = [F || F <- Filelist, filelib:is_dir(F)],
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Files = Filelist -- Dirs,
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ok = delete_each(Files),
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ok = delete_each_dir_win32(Dirs),
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ok
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end.
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-spec cp_r(list(string()), file:filename()) -> 'ok'.
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cp_r([], _Dest) ->
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ok;
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cp_r(Sources, Dest) ->
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case os:type() of
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{unix, Os} ->
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EscSources = [rebar_utils:escape_chars(Src) || Src <- Sources],
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SourceStr = rebar_string:join(EscSources, " "),
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% On darwin the following cp command will cp everything inside
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% target vs target and everything inside, so we chop the last char
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% off if it is a '/'
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Source = case {Os == darwin, lists:last(SourceStr) == $/} of
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{true, true} ->
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rebar_string:trim(SourceStr, trailing, "/");
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{true, false} ->
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SourceStr;
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{false, _} ->
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SourceStr
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end,
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% ensure destination exists before copying files into it
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{ok, []} = rebar_utils:sh(?FMT("mkdir -p ~ts",
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[rebar_utils:escape_chars(Dest)]),
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[{use_stdout, false}, abort_on_error]),
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{ok, []} = rebar_utils:sh(?FMT("cp -Rp ~ts \"~ts\"",
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[Source, rebar_utils:escape_double_quotes(Dest)]),
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[{use_stdout, true}, abort_on_error]),
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ok;
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{win32, _} ->
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lists:foreach(fun(Src) -> ok = cp_r_win32(Src,Dest) end, Sources),
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ok
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end.
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-spec mv(string(), file:filename()) -> 'ok'.
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mv(Source, Dest) ->
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case os:type() of
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{unix, _} ->
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EscSource = rebar_utils:escape_chars(Source),
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EscDest = rebar_utils:escape_chars(Dest),
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case rebar_utils:sh(?FMT("mv ~ts ~ts", [EscSource, EscDest]),
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[{use_stdout, false}, abort_on_error]) of
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{ok, []} ->
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ok;
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{ok, Warning} ->
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?WARN("mv: ~p", [Warning]),
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ok
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end;
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{win32, _} ->
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case filelib:is_dir(Source) of
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true ->
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SrcDir = filename:nativename(Source),
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DestDir = case filelib:is_dir(Dest) of
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true ->
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%% to simulate unix/posix mv, we have to replicate
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%% the same directory movement by moving the whole
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%% top-level directory, not just the insides
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SrcName = filename:basename(Source),
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filename:nativename(filename:join(Dest, SrcName));
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false ->
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filename:nativename(Dest)
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end,
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robocopy_dir(SrcDir, DestDir);
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false ->
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SrcDir = filename:nativename(filename:dirname(Source)),
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SrcName = filename:basename(Source),
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DestDir = filename:nativename(filename:dirname(Dest)),
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DestName = filename:basename(Dest),
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IsDestDir = filelib:is_dir(Dest),
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if IsDestDir ->
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%% if basename and target name are different because
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%% we move to a directory, then just move there.
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%% Similarly, if they are the same but we're going to
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%% a directory, let's just do that directly.
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FullDestDir = filename:nativename(Dest),
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robocopy_file(SrcDir, FullDestDir, SrcName)
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; SrcName =:= DestName ->
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%% if basename and target name are the same and both are files,
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%% we do a regular move with robocopy without rename.
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robocopy_file(SrcDir, DestDir, DestName)
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; SrcName =/= DestName->
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robocopy_mv_and_rename(Source, Dest, SrcDir, SrcName, DestDir, DestName)
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end
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end
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end.
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robocopy_mv_and_rename(Source, Dest, SrcDir, SrcName, DestDir, DestName) ->
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%% If we're moving a file and the origin and
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%% destination names are different:
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%% - mktmp
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%% - robocopy source_dir tmp_dir srcname
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%% - rename srcname destname (to avoid clobbering)
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%% - robocopy tmp_dir dest_dir destname
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%% - remove tmp_dir
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case ec_file:insecure_mkdtemp() of
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{error, _Reason} ->
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{error, lists:flatten(
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io_lib:format("Failed to move ~ts to ~ts (tmpdir failed)~n",
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[Source, Dest]))};
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TmpPath ->
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case robocopy_file(SrcDir, TmpPath, SrcName) of
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{error, Reason} ->
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{error, Reason};
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ok ->
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TmpSrc = filename:join(TmpPath, SrcName),
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TmpDst = filename:join(TmpPath, DestName),
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case file:rename(TmpSrc, TmpDst) of
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{error, _} ->
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{error, lists:flatten(
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io_lib:format("Failed to move ~ts to ~ts (via rename)~n",
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[Source, Dest]))};
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ok ->
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case robocopy_file(TmpPath, DestDir, DestName) of
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Err = {error, _} -> Err;
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OK -> rm_rf(TmpPath), OK
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end
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end
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end
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end.
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robocopy_file(SrcPath, DestPath, FileName) ->
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Cmd = ?FMT("robocopy /move /e \"~ts\" \"~ts\" \"~ts\" 1> nul",
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[rebar_utils:escape_double_quotes(SrcPath),
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rebar_utils:escape_double_quotes(DestPath),
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rebar_utils:escape_double_quotes(FileName)]),
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Res = rebar_utils:sh(Cmd, [{use_stdout, false}, return_on_error]),
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case win32_ok(Res) of
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false ->
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{error, lists:flatten(
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io_lib:format("Failed to move ~ts to ~ts~n",
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[filename:join(SrcPath, FileName),
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filename:join(DestPath, FileName)]))};
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true ->
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ok
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end.
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robocopy_dir(Source, Dest) ->
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Cmd = ?FMT("robocopy /move /e \"~ts\" \"~ts\" 1> nul",
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[rebar_utils:escape_double_quotes(Source),
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rebar_utils:escape_double_quotes(Dest)]),
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Res = rebar_utils:sh(Cmd,
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[{use_stdout, false}, return_on_error]),
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case win32_ok(Res) of
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true -> ok;
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false ->
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{error, lists:flatten(
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io_lib:format("Failed to move ~ts to ~ts~n",
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[Source, Dest]))}
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end.
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win32_ok({ok, _}) -> true;
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win32_ok({error, {Rc, _}}) when Rc<9; Rc=:=16 -> true;
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win32_ok(_) -> false.
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delete_each([]) ->
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ok;
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delete_each([File | Rest]) ->
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case file:delete(File) of
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ok ->
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delete_each(Rest);
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{error, enoent} ->
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delete_each(Rest);
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{error, Reason} ->
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?ERROR("Failed to delete file ~ts: ~p\n", [File, Reason]),
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?ABORT
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end.
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%% @doc backwards compat layer to pre-utf8 support
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write_file_if_contents_differ(Filename, Bytes) ->
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write_file_if_contents_differ(Filename, Bytes, raw).
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%% @doc let the user pick the encoding required; there are no good
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%% heuristics for data encoding
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write_file_if_contents_differ(Filename, Bytes, raw) ->
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write_file_if_contents_differ_(Filename, iolist_to_binary(Bytes));
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write_file_if_contents_differ(Filename, Bytes, utf8) ->
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write_file_if_contents_differ_(Filename, unicode:characters_to_binary(Bytes, utf8)).
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%% @private compare raw strings and check contents
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write_file_if_contents_differ_(Filename, ToWrite) ->
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case file:read_file(Filename) of
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{ok, ToWrite} ->
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ok;
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{ok, _} ->
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file:write_file(Filename, ToWrite, [raw]);
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{error, _} ->
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file:write_file(Filename, ToWrite, [raw])
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end.
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%% returns an os appropriate tmpdir given a path
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-spec system_tmpdir() -> file:filename().
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system_tmpdir() -> system_tmpdir([]).
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-spec system_tmpdir(PathComponents) -> file:filename() when
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PathComponents :: [file:name()].
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system_tmpdir(PathComponents) ->
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Tmp = case erlang:system_info(system_architecture) of
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"win32" ->
|
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"./tmp";
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_SysArch ->
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"/tmp"
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end,
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filename:join([Tmp|PathComponents]).
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|
|
%% recursively removes a directory and then recreates the same
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%% directory but empty
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-spec reset_dir(Path) -> ok | {error, Reason} when
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Path :: file:name(),
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Reason :: file:posix().
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|
|
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reset_dir(Path) ->
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%% delete the directory if it exists
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_ = ec_file:remove(Path, [recursive]),
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%% recreate the directory
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ensure_dir(Path).
|
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|
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|
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%% Linux touch but using erlang functions to work in bot *nix os and
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%% windows
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|
-spec touch(Path) -> ok | {error, Reason} when
|
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Path :: file:name(),
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Reason :: file:posix().
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|
touch(Path) ->
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|
{ok, A} = file:read_file_info(Path),
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ok = file:write_file_info(Path, A#file_info{mtime = calendar:local_time(),
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atime = calendar:local_time()}).
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|
|
|
%% for a given path return the path relative to a base directory
|
|
-spec path_from_ancestor(string(), string()) -> {ok, string()} | {error, badparent}.
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|
|
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path_from_ancestor(Target, To) ->
|
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path_from_ancestor_(filename:split(canonical_path(Target)),
|
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filename:split(canonical_path(To))).
|
|
|
|
path_from_ancestor_([Part|Target], [Part|To]) -> path_from_ancestor_(Target, To);
|
|
path_from_ancestor_([], []) -> {ok, ""};
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path_from_ancestor_(Target, []) -> {ok, filename:join(Target)};
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path_from_ancestor_(_, _) -> {error, badparent}.
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|
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|
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%% reduce a filepath by removing all incidences of `.' and `..'
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|
-spec canonical_path(string()) -> string().
|
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|
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canonical_path(Dir) ->
|
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Canon = canonical_path([], filename:split(filename:absname(Dir))),
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filename:nativename(Canon).
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|
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canonical_path([], []) -> filename:absname("/");
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|
canonical_path(Acc, []) -> filename:join(lists:reverse(Acc));
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canonical_path(Acc, ["."|Rest]) -> canonical_path(Acc, Rest);
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canonical_path([_|Acc], [".."|Rest]) -> canonical_path(Acc, Rest);
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|
canonical_path([], [".."|Rest]) -> canonical_path([], Rest);
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|
canonical_path(Acc, [Component|Rest]) -> canonical_path([Component|Acc], Rest).
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|
|
%% @doc make a path absolute
|
|
-spec absolute_path(file:filename()) -> file:filename().
|
|
absolute_path(Path) ->
|
|
case filename:pathtype(Path) of
|
|
absolute ->
|
|
Path;
|
|
relative ->
|
|
{ok, Dir} = file:get_cwd(),
|
|
filename:join([Dir, Path]);
|
|
volumerelative ->
|
|
[Letter, $: | _] = filename:nativename(filename:absname(Path)),
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|
Volume = [Letter, $:],
|
|
{ok, Dir} = file:get_cwd(Volume),
|
|
Volume ++ filename:join([Dir, Path])
|
|
end.
|
|
|
|
%% @doc normalizing a path removes all of the `..' and the
|
|
%% `.' segments it may contain.
|
|
-spec normalized_path(file:filename()) -> file:filename().
|
|
normalized_path(Path) ->
|
|
AbsPath = absolute_path(Path),
|
|
Components = filename:split(AbsPath),
|
|
normalized_path(Components, []).
|
|
|
|
%% @private drops path fragments for normalization
|
|
-spec normalized_path([string()], [string()]) -> file:filename().
|
|
normalized_path([], NormalizedPath) ->
|
|
filename:join(lists:reverse(NormalizedPath));
|
|
normalized_path([H|T], NormalizedPath) ->
|
|
case H of
|
|
"." when NormalizedPath == [], T == [] -> normalized_path(T, ["."]);
|
|
"." -> normalized_path(T, NormalizedPath);
|
|
".." when NormalizedPath == [] -> normalized_path(T, [".."]);
|
|
".." when hd(NormalizedPath) =/= ".." -> normalized_path(T, tl(NormalizedPath));
|
|
_ -> normalized_path(T, [H|NormalizedPath])
|
|
end.
|
|
|
|
%% @doc normalizes relative paths so that ./a/b/c/ => a/b/c
|
|
-spec normalize_relative_path(string()) -> file:filename().
|
|
normalize_relative_path(Path) ->
|
|
normalized_path(filename:split(Path), []).
|
|
|
|
%% @doc returns canonical target of path if path is a link, otherwise returns path
|
|
-spec resolve_link(string()) -> string().
|
|
resolve_link(Path) ->
|
|
case file:read_link(Path) of
|
|
{ok, Target} ->
|
|
canonical_path(filename:absname(Target, filename:dirname(Path)));
|
|
{error, _} -> Path
|
|
end.
|
|
|
|
%% @doc splits a path into dirname and basename
|
|
-spec split_dirname(string()) -> {string(), string()}.
|
|
split_dirname(Path) ->
|
|
{filename:dirname(Path), filename:basename(Path)}.
|
|
|
|
-spec ensure_dir(filelib:dirname_all()) -> ok | {error, file:posix()}.
|
|
ensure_dir(Path) ->
|
|
filelib:ensure_dir(filename:join(Path, "fake_file")).
|
|
|
|
%% ===================================================================
|
|
%% Internal functions
|
|
%% ===================================================================
|
|
|
|
delete_each_dir_win32([]) -> ok;
|
|
delete_each_dir_win32([Dir | Rest]) ->
|
|
{ok, []} = rebar_utils:sh(?FMT("rd /q /s \"~ts\"",
|
|
[rebar_utils:escape_double_quotes(filename:nativename(Dir))]),
|
|
[{use_stdout, false}, return_on_error]),
|
|
delete_each_dir_win32(Rest).
|
|
|
|
xcopy_win32(Source,Dest)->
|
|
%% "xcopy \"~ts\" \"~ts\" /q /y /e 2> nul", Changed to robocopy to
|
|
%% handle long names. May have issues with older windows.
|
|
Cmd = case filelib:is_dir(Source) of
|
|
true ->
|
|
%% For robocopy, copying /a/b/c/ to /d/e/f/ recursively does not
|
|
%% create /d/e/f/c/*, but rather copies all files to /d/e/f/*.
|
|
%% The usage we make here expects the former, not the later, so we
|
|
%% must manually add the last fragment of a directory to the `Dest`
|
|
%% in order to properly replicate POSIX platforms
|
|
NewDest = filename:join([Dest, filename:basename(Source)]),
|
|
?FMT("robocopy \"~ts\" \"~ts\" /e 1> nul",
|
|
[rebar_utils:escape_double_quotes(filename:nativename(Source)),
|
|
rebar_utils:escape_double_quotes(filename:nativename(NewDest))]);
|
|
false ->
|
|
?FMT("robocopy \"~ts\" \"~ts\" \"~ts\" /e 1> nul",
|
|
[rebar_utils:escape_double_quotes(filename:nativename(filename:dirname(Source))),
|
|
rebar_utils:escape_double_quotes(filename:nativename(Dest)),
|
|
rebar_utils:escape_double_quotes(filename:basename(Source))])
|
|
end,
|
|
Res = rebar_utils:sh(Cmd,
|
|
[{use_stdout, false}, return_on_error]),
|
|
case win32_ok(Res) of
|
|
true -> ok;
|
|
false ->
|
|
{error, lists:flatten(
|
|
io_lib:format("Failed to copy ~ts to ~ts~n",
|
|
[Source, Dest]))}
|
|
end.
|
|
|
|
cp_r_win32({true, SourceDir}, {true, DestDir}) ->
|
|
%% from directory to directory
|
|
ok = case file:make_dir(DestDir) of
|
|
{error, eexist} -> ok;
|
|
Other -> Other
|
|
end,
|
|
ok = xcopy_win32(SourceDir, DestDir);
|
|
cp_r_win32({false, Source} = S,{true, DestDir}) ->
|
|
%% from file to directory
|
|
cp_r_win32(S, {false, filename:join(DestDir, filename:basename(Source))});
|
|
cp_r_win32({false, Source},{false, Dest}) ->
|
|
%% from file to file
|
|
{ok,_} = file:copy(Source, Dest),
|
|
ok;
|
|
cp_r_win32({true, SourceDir}, {false, DestDir}) ->
|
|
case filelib:is_regular(DestDir) of
|
|
true ->
|
|
%% From directory to file? This shouldn't happen
|
|
{error, lists:flatten(
|
|
io_lib:format("Cannot copy dir (~p) to file (~p)\n",
|
|
[SourceDir, DestDir]))};
|
|
false ->
|
|
%% Specifying a target directory that doesn't currently exist.
|
|
%% So let's attempt to create this directory
|
|
case ensure_dir(DestDir) of
|
|
ok ->
|
|
ok = xcopy_win32(SourceDir, DestDir);
|
|
{error, Reason} ->
|
|
{error, lists:flatten(
|
|
io_lib:format("Unable to create dir ~p: ~p\n",
|
|
[DestDir, Reason]))}
|
|
end
|
|
end;
|
|
cp_r_win32(Source,Dest) ->
|
|
Dst = {filelib:is_dir(Dest), Dest},
|
|
lists:foreach(fun(Src) ->
|
|
ok = cp_r_win32({filelib:is_dir(Src), Src}, Dst)
|
|
end, filelib:wildcard(Source)),
|
|
ok.
|