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%% This is file `download.sty', generated from `download.tex' (key `package').
%% download - download files with LaTeX
%%
%% Copyright (C) 2012-2013 by Simon Sigurdhsson <sigurdhsson@gmail.com>
%%
%% This work may be distributed and/or modified under the
%% conditions of the LaTeX Project Public License, either version 1.3
%% of this license or (at your option) any later version.
%% The latest version of this license is in
%% http://www.latex-project.org/lppl.txt
%% and version 1.3 or later is part of all distributions of LaTeX
%% version 2005/12/01 or later.
%%
%% This work has the LPPL maintenance status `maintained'.
%%
%% The Current Maintainer of this work is Simon Sigurdhsson.
%%
%% This work consists of the file download.tex
%% and the derived file download.sty.
\RequirePackage{expl3,l3keys2e,pdftexcmds,xparse}
\ProvidesExplPackage{download}
{2013/04/08}{1.1}{download files with LaTeX}
\msg_new:nnnn{download}{no-write18}{Could~not~use~\string\write18!}
{Please~run~`latex`~with~the~`--shell-escape`~flag.}
\msg_new:nnnn{download}{no-engine}{Could~not~find~any~engine!}
{Please~make~sure~one~of~the~engines~is~installed~and~in~your~PATH.}
\msg_new:nnnn{download}{no-name}{Using~\string\download\space~with~no~filename!}
{This~means~I~will~download~the~file~even~if~it~already~exists.}
\msg_new:nnn{download}{use-curl}{Using~cURL.}
\msg_new:nnn{download}{use-wget}{Using~wget.}
\msg_new:nnn{download}{use-ariaII}{Using~aria2.}
\msg_new:nnn{download}{use-axel}{Using~axel.}
\prg_new_conditional:Nnn\__download_if_shellescape:{F}{
\if_cs_exist:N\pdf@shellescape
\if_int_compare:w\pdf@shellescape=\c_one
\prg_return_true:
\else:
\prg_return_false:
\fi:
\else:
\prg_return_true:
\fi:
}
\cs_new:Npn\__download_rm:n#1{
\immediate\write18{rm~#1}
}
\prg_new_conditional:Npnn\__download_if_executable_test:n#1{TF,T,F,p}{
\immediate\write18{which~#1~&&~touch~\jobname.aex}
\file_if_exist:nTF{\jobname.aex}{
\__download_rm:n{\jobname.aex}
\prg_return_true:
}{
\prg_return_false:
}
}
\cs_new:Npn\__download_curl_do:nn#1#2{
\IfNoValueTF{#1}{
\immediate\write18{curl~-L~-s~#2}
}{
\immediate\write18{curl~-L~-s~-o~#1~#2}
}
}
\cs_new:Npn\__download_wget_do:nn#1#2{
\IfNoValueTF{#1}{
\immediate\write18{wget~-q~-nc~#2}
}{
\immediate\write18{wget~-q~-nc~-O~#1~#2}
}
}
\cs_new:Npn\__download_ariaII_do:nn#1#2{
\IfNoValueTF{#1}{
\immediate\write18{aria2c~-q~--auto-file-renaming=false~#2}
}{
\immediate\write18{aria2c~-q~--auto-file-renaming=false~-o~#1~#2}
}
}
\cs_new:Npn\__download_axel_do:nn#1#2{
\IfNoValueTF{#1}{
\immediate\write18{axel~-q~#2}
}{
\immediate\write18{axel~-q~-o~#1~#2}
}
}
\prg_new_conditional:Nnn\__download_if_auto_test:{F,TF}{
\__download_if_executable_test:nTF{wget}{
\prg_return_true:
}{
\__download_if_executable_test:nTF{curl}{
\prg_return_true:
}{
\__download_if_executable_test:nTF{aria2c}{
\prg_return_true:
}{
\__download_if_executable_test:nTF{axel}{
\prg_return_true:
}{
\prg_return_false:
}
}
}
}
}
\cs_new:Npn\__download_auto_do:nn#1#2{
\__download_if_executable_test:nTF{wget}{
\msg_info:nn{download}{use-wget}
\__download_wget_do:nn{#1}{#2}
}{
\__download_if_executable_test:nTF{curl}{
\msg_info:nn{download}{use-curl}
\__download_curl_do:nn{#1}{#2}
}{
\__download_if_executable_test:nTF{aria2c}{
\msg_info:nn{download}{use-ariaII}
\__download_ariaII_do:nn{#1}{#2}
}{
\msg_info:nn{download}{use-axel}
\__download_axel_do:nn{#1}{#2}
}
}
}
}
\keys_define:nn{download}{
engine .choice:,
engine / auto .code:n =
{\cs_gset_eq:NN\__download_do:nn\__download_auto_do:nn
\prg_set_conditional:Nnn\__download_if_test:{F}{
\__download_if_auto_test:TF
{\prg_return_true:}{\prg_return_false:}}},
engine / curl .code:n =
{\cs_gset_eq:NN\__download_do:nn\__download_curl_do:nn
\prg_set_conditional:Nnn\__download_if_test:{F}{
\__download_if_executable_test:nTF{curl}
{\prg_return_true:}{\prg_return_false:}}},
engine / wget .code:n =
{\cs_gset_eq:NN\__download_do:nn\__download_wget_do:nn
\prg_set_conditional:Nnn\__download_if_test:{F}{
\__download_if_executable_test:nTF{wget}
{\prg_return_true:}{\prg_return_false:}}},
engine / aria2 .code:n =
{\cs_gset_eq:NN\__download_do:nn\__download_ariaII_do:nn
\prg_set_conditional:Nnn\__download_if_test:{F}{
\__download_if_executable_test:nTF{aria2c}
{\prg_return_true:}{\prg_return_false:}}},
engine / axel .code:n =
{\cs_gset_eq:NN\__download_do:nn\__download_axel_do:nn
\prg_set_conditional:Nnn\__download_if_test:{F}{
\__download_if_executable_test:nTF{axel}
{\prg_return_true:}{\prg_return_false:}}},
engine .initial:n = auto,
engine .default:n = auto,
}
\ProcessKeysPackageOptions{download}
\__download_if_shellescape:F{\msg_fatal:nn{download}{no-write18}}
\__download_if_test:F{\msg_fatal:nn{download}{no-engine}}
\DeclareDocumentCommand\download{om}{
\IfNoValueTF{#1}{
\msg_warning:nn{download}{no-name}
\__download_do:nn{#1}{#2}
}{
\file_if_exist:nTF{#1}{}{\__download_do:nn{#1}{#2}}
}
}
\endinput
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