236 lines
10 KiB
C++
236 lines
10 KiB
C++
/*
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* This program source code file is part of KiCad, a free EDA CAD application.
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*
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* Copyright (C) 2013 SoftPLC Corporation, Dick Hollenbeck <dick@softplc.com>
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* Copyright (C) 2016-2017 KiCad Developers, see AUTHORS.txt for contributors.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, you may find one here:
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* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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* or you may search the http://www.gnu.org website for the version 2 license,
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* or you may write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#ifndef GITHUB_PLUGIN_H_
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#define GITHUB_PLUGIN_H_
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#include <kicad_plugin.h>
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struct GH_CACHE;
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/**
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Class GITHUB_PLUGIN
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implements a portion of pcbnew's PLUGIN interface to provide read only access
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to a github repo consisting of pretty footprints, and optionally provides "Copy On Write"
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support of edited footprints.
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<p>It could have used version 3 of the github.com API documented here:
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<pre>
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http://developer.github.com/v3/
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https://help.github.com/articles/creating-an-access-token-for-command-line-use
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</pre>
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but it does not, since a better technique was discovered. Cleverly this
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plugin simply reads in a zip file of the repo and unzips it from RAM as
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needed. Therefore this "Github" plugin is <b>read only for accessing remote
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pretty libraries at https://github.com.</b>
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<p>The fp-lib-table dialog is entered via menu choice "Preferences | Library
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Tables". For easy options editing in the current row, click on the "Edit
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Options" button. The "Library Path" in the fp-lib-table row for a Github
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library should be set to the full https:// URL.
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<p>For example:
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<pre>
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https://github.com/liftoff-sr/pretty_footprints
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</pre>
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This is typically
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<pre>
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https://github.com/user_name/repo_name
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</pre>
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<p>
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The "Plugin Type" should be set to "Github".
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<p>This plugin also supports "Copy On Write", a.k.a. "COW". Thus a Github
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library may take an optional option called
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<b>allow_pretty_writing_to_this_dir</b>. This option is essentially the
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"Library Path" for a local "KiCad" (pretty) type library which is combined to
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make up the Github library found in the same fp-lib-table row. If the option
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is missing, then the Github library is read only as always. If the option is
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present for a Github library, then any writes to this hybrid library will go
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to the local *.pretty directory. Note that the github.com resident portion of
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this hybrid COW library is always read only, meaning you cannot delete
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anything or modify any footprint at github directly. The aggregate library
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type remains "Github" in your discussions, but it consists of a local R/W
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portion and a remote R/O portion.
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<p>Below is an fp-lib-table entry for the case without option
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<b>allow_pretty_writing_to_this_dir</b>:
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<table>
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<tr>
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<th>Nickname</th><th>Library Path</th><th>Plugin Type</th><th>Options</th><th>Description</th>
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</tr>
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<tr>
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<td>github</td><td>https://github.com/liftoff-sr/pretty_footprints</td><td>Github</td>
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<td></td><td>Liftoff's GH footprints</td>
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</tr>
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</table>
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Below is an fp-lib-table entry with the COW option given. Note the use of the environment variable
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${HOME}, as an example only. The github.pretty directory is based in ${HOME}/pretty/. Anytime you
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use option allow_pretty_writing_to_this_dir, you will create that directory manually and it must
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end in extension <b>.pretty</b>.
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<table>
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<tr>
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<th>Nickname</th><th>Library Path</th><th>Plugin Type</th><th>Options</th><th>Description</th>
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</tr>
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<tr>
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<td>github</td><td>https://github.com/liftoff-sr/pretty_footprints</td><td>Github</td>
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<td>allow_pretty_writing_to_this_dir=${HOME}/pretty/github.pretty</td>
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<td>Liftoff's GH footprints</td>
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</tr>
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</table>
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<p>Any footprint loads will always give precedence to the local footprints
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found in the pretty dir given by option
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<b>allow_pretty_writing_to_this_dir</b>. So once you have written to the COW
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library's local directory by doing a footprint save, no github updates will
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be seen when loading a footprint by the same name as one for which you've
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written locally.
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<p>Always keep a separate local *.pretty directory for each Github library,
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never combine them by referring to the same directory more than once. Also,
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do not also use the same COW (*.pretty) directory in a "KiCad" fp-lib-table
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entry. This would likely create a mess. The COW directory should be manually
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created in advance, and the directory name must end with ".pretty". The value
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of the option <b>allow_pretty_writing_to_this_dir</b> will be path
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substituted with any environment variable strings embedded, just like the
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"Library Path" is.
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<p>What's the point of COW? It is to turbo-charge the sharing of footprints.
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If you periodically email your COW pretty footprint modifications to the
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Github repo maintainer, you can help update the Github copy. Simply email the
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individual *.kicad_mod files you find in your COW directories. After you've
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received confirmation that your changes have been committed up at github.com,
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you can safely delete your COW file(s) and those from github.com will flow
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down. Your goal should be to keep the COW file set as small as possible by
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contributing frequently to the shared master copies at https://github.com.
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<p>Note that if you use the module editor to delete a footprint and it is
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present in the COW local dir, it will get deleted from there. However, it may
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not be deleted from the library as a whole if the footprint of the same name
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also exists in the github repo. In this case deleting the local copy will
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simply unmask the one at the github repo. Remember, it is masked out if there
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is a local COW copy, since the local copy always takes precedence. And
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remember you cannot modify the github copy except by emailing a COW
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modification to the repo maintainer.
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<p>If you happen to be the repo maintainer, then the obvious solution for you
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is to make your COW directory <b>be</b> your working copy directory. From
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there you can push to github. And you can receive *.kicad_mod files by email
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and put them into your local working copy directory also and do diffs,
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reverting or denying when appropriate, editing when appropriate before
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pushing or denying the change. Ultimately you would owe the sender either a
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note of acceptance or denial by email.
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@author Dick Hollenbeck
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@date Original date: 10-Sep-2013
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*/
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class GITHUB_PLUGIN : public PCB_IO
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{
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public:
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//-----<PLUGIN API>----------------------------------------------------------
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const wxString PluginName() const override;
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const wxString GetFileExtension() const override;
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void FootprintEnumerate( wxArrayString& aFootprintNames, const wxString& aLibraryPath,
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const PROPERTIES* aProperties = NULL ) override;
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void PrefetchLib( const wxString& aLibraryPath,
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const PROPERTIES* aProperties = NULL ) override;
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MODULE* FootprintLoad( const wxString& aLibraryPath,
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const wxString& aFootprintName, const PROPERTIES* aProperties ) override;
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void FootprintSave( const wxString& aLibraryPath, const MODULE* aFootprint,
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const PROPERTIES* aProperties = NULL ) override;
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void FootprintDelete( const wxString& aLibraryPath, const wxString& aFootprintName,
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const PROPERTIES* aProperties = NULL ) override;
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bool IsFootprintLibWritable( const wxString& aLibraryPath ) override;
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long long GetLibraryTimestamp( const wxString& aLibraryPath ) const override;
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void FootprintLibOptions( PROPERTIES* aListToAppendTo ) const override;
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// Since I derive from PCB_IO, I have to implement this, else I'd inherit his, which is bad since
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// my lib_path is not his. Note: it is impossible to create a Github library, but can the C.O.W. portion.
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void FootprintLibCreate( const wxString& aLibraryPath, const PROPERTIES* aProperties ) override;
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// Since I derive from PCB_IO, I have to implement this, else I'd inherit his, which is bad since
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// my lib_path is not his. Note: it is impossible to delete a Github library, but can the C.O.W portion.
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bool FootprintLibDelete( const wxString& aLibraryPath, const PROPERTIES* aProperties ) override;
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//-----</PLUGIN API>---------------------------------------------------------
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GITHUB_PLUGIN(); // constructor, if any, must be zero arg
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~GITHUB_PLUGIN();
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protected:
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void init( const PROPERTIES* aProperties );
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void cacheLib( const wxString& aLibraryPath, const PROPERTIES* aProperties );
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/**
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* Function repoURL_zipURL
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* translates a repo URL to a zipfile URL name as commonly seen on github.com
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*
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* @param aRepoURL points to the base of the repo.
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* @param aZipURL is where to put the zip file URL.
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* @return bool - true if @a aRepoULR was parseable, else false
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*/
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static bool repoURL_zipURL( const wxString& aRepoURL, std::string* aZipURL );
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/**
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* Function remoteGetZip
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* fetches a zip file image from a github repo synchronously. The byte image
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* is received into the m_input_stream. If the image has already been stored,
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* do nothing.
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*/
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void remoteGetZip( const wxString& aRepoURL );
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wxString m_lib_path; ///< from aLibraryPath, something like https://github.com/liftoff-sr/pretty_footprints
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std::string m_zip_image; ///< byte image of the zip file in its entirety.
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GH_CACHE* m_gh_cache;
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wxString m_pretty_dir;
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};
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#endif // GITHUB_PLUGIN_H_
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