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<title>CentOS Artwork Repository: 2.73 The trunk/Scripts/Functions/Svg Directory</title>
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<meta http-equiv="content-type" content="text/html; charset=UTF-8" />
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<meta name="copyright" content="2009-2011 Alain Reguera Delgado" />
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[ < ]
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[ << ]
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[Top]
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[Contents]
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[Index]
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[ ? ]
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2.73 The <tt>`trunk/Scripts/Functions/Svg'</tt> Directory
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2.73.1 Goals
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This section exists to organize files related to svg
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functionality of <tt>`centos-art.sh'</tt> script.
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2.73.2 Description
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The svg functionality of <tt>`centos-art.sh'</tt> script helps you
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to maintain scalable vector graphics (SVG) inside repository. For
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example, suppose you've been working in CentOS default design models
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under <tt>`trunk/Identity/Themes/Models/'</tt>, and you want to set common
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metadata to all of them, and later remove all unused SVG defintions
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from <samp>`*.svg'</samp> files. Doing so file by file may be a tedious task,
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so the <tt>`centos-art.sh'</tt> script provides the svg
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functionality to aid you maintain such actions.
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2.73.2.1 Metadata maintainance
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The metadata used is defined by Inkscape 0.46 using the SVG standard
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markup. The <tt>`centos-art.sh'</tt> script replaces everything
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in-between <metadata and </metadata> tags with a
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predefined metadata template we've set for this purpose.
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The metadata template was created using the metadata information of a
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file which, using Inkscape 0.46, all metadata fields were set. This
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created a complete markup representation of how SVG metadata would
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look like. Later, we replaced every single static value with a
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translation marker in the form <samp>`=SOMETEXT='</samp>, where
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SOMETEXT is the name of its main opening tag. Later, we
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transform the metadata template into a sed replacement set of commads
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escaping new lines at the end of each line.
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With metadata template in place, the <tt>`centos-art.sh'</tt> script uses
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it to create a metadata template instance for the file being processed
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currently. The metadata template instance contains the metadata
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portion of sed replacement commands with translation markers already
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traduced. In this action, instance creation, is where we take
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advantage of automation and generate metadata values like title, date,
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keywords, source, identifier, and relation dynamically, based on the
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file path <tt>`centos-art.sh'</tt> script is currently creating metadata
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information for.
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With metadata template instance in place, the <tt>`centos-art.sh'</tt>
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script uses it to replace real values inside all <samp>`.svg'</samp> files
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under the current location you're running the <tt>`centos-art.sh'</tt>
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script on. Default behaviour is to ask user to enter each metadatum
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required, one by one. If user leaves metadatum empty, by pressing
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RET key, <tt>`centos-art.sh'</tt> uses its default value.
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The <tt>`centos-art.sh'</tt> script modifies the following metadata:
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<samp>`Title'</samp>
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Name by which this document is formally known. If no value is set
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here, <tt>`centos-art.sh'</tt> script uses the file name as title.
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<samp>`Date'</samp>
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Date associated with the creation of this document (YYYY-MM-DD). If no
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value is set here, <tt>`centos-art.sh'</tt> script uses the current date
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information as in date +%Y-%m-%d.
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<samp>`Creator'</samp>
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Name of entity primarily responsible for making the content of this
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document. If no value is set here, <tt>`centos-art.sh'</tt> script uses
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the string <samp>`The CentOS Project'</samp>.
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<samp>`Rights'</samp>
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Name of entity with rights to the intellectual Property of this
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document. If no value is set here, <tt>`centos-art.sh'</tt> script uses
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the string <samp>`The CentOS Project'</samp>.
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<samp>`Publisher'</samp>
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Name of entity responsible for making this document available. If no
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value is set here, <tt>`centos-art.sh'</tt> script uses the string
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<samp>`The CentOS Project'</samp>.
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<samp>`Identifier'</samp>
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Unique URI to reference this document. If no value is set here,
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<tt>`centos-art.sh'</tt> script uses the current file path to build the
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related url that points to current file location inside repository
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central server.
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<samp>`Source'</samp>
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Unique URI to reference the source of this document. If no value is
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set here, <tt>`centos-art.sh'</tt> script uses current file path to build
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the related url that points to current file location inside repository
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central server.
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<samp>`Relation'</samp>
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Unique URI to a related document. If no value is set here,
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<tt>`centos-art.sh'</tt> script uses current file path to build the
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related url that points to current file location inside repository
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central server.
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<samp>`Language'</samp>
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Two-letter language tag with optional subtags for the language of this
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document. (e.g. <samp>`en-GB'</samp>). If no value is set here,
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<tt>`centos-art.sh'</tt> script uses the current locale information as in
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cli_getCurrentLocale function.
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<samp>`Keywords'</samp>
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The topic of this document as comma-separated key words, prhases, or
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classifications. If no value is set here, <tt>`centos-art.sh'</tt> script
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uses file path to build
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<samp>`Coverage'</samp>
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Extent or scope of this document. If no value is set here,
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<tt>`centos-art.sh'</tt> script uses the string <samp>`The CentOS Project'</samp>.
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<samp>`Description'</samp>
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Description about the document. If no value is set here,
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<tt>`centos-art.sh'</tt> script uses uses empty value as default.
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<samp>`Contributors'</samp>
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People that contributes in the creation/maintainance of the document.
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If no value is set here, <tt>`centos-art.sh'</tt> script uses uses empty
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value as default.
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The <samp>`License'</samp> metadatum is not set as a choise, by now. It is
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fixed Creative Common Attribution Share-Alike 3.0 License. This is done in order to
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grant license consistency among all SVG files we manage inside CentOS
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Artwork Repository.
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2.73.2.2 Unused definitions
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Many of the no-longer-used gradients, patterns, and markers (more
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precisely, those which you edited manually) remain in the
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corresponding palettes and can be reused for new objects. However if
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you want to optimize your document, use the <samp>`Vacuum Defs'</samp> command
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in <samp>`File'</samp> menu. It will remove any gradients, patterns, or
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markers which are not used by anything in the document, making the
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file smaller.
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If you have one or two couple of files, removing unused definitions
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using the graphical interface may be enough to you. In contrast, if
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you have dozens or even houndreds of scalable vector graphics files to
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maintain it is not a fun task to use the graphical interface to remove
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unused definitions editing those files one by one.
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To remove unused definitions from several scalable vector graphics
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files, the <tt>`centos-art.sh'</tt> script uses Inkscape command-line
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interface, specifically with the <samp>`--vaccum-defs'</samp> option.
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2.73.3 Usage
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centos-art svg --update-metadata='path/to/dir'
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centos-art svg --update-metadata='path/to/dir' --filter='regex'
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Use these commands to update metadata information to <samp>`.svg'</samp> files
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under <samp>`path/to/dir'</samp> directory.
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centos-art svg --vacuum-defs='path/to/dir'
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centos-art svg --vacuum-defs='path/to/dir' --filter='regex'
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Use these commands to remove unused definitions inside <samp>`.svg'</samp>
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files under <samp>`path/to/dir'</samp> directory.
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When you provide <samp>`--filter='regex''</samp> argument, the list of files
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to process is reduced as specified in <samp>`regex'</samp> regular expression.
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Inside <tt>`centos-art.sh'</tt> script, the <samp>`regex'</samp> regular
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expression is used in combination with find command to look
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for files matching the regular expression path pattern.
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 Warning In order for <samp>`regex'</samp> regular expression to match
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a file, the <samp>`regex'</samp> regular expresion must match the whole file
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path not just the file name.
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For example, if you want to match all <tt>`summary.svg'</tt> files inside
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<tt>`path/to/dir'</tt>, use the .+/summary regular expression.
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Later, <tt>`centos-art.sh'</tt> script uses this value inside
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^$REGEX\.svg$ expression in order to build the final regular
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expression (i.e., ^.+/summary\.svg$) that is evaluated against
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available file paths inside the list of files to process.
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Exceptionally, when you provide <samp>`--filter='regex''</samp> in the way
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that <samp>`regex'</samp>, appended to <samp>`path/to/dir/'</samp> (i.e.
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<samp>`path/to/dir/regex'</samp>), matches a regular file; the
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<tt>`centos-art.sh'</tt> script uses the file matching as only file in the
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list of files to process.
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2.73.4 See also
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2.62 The <tt>`trunk/Scripts'</tt> Directory
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[ < ]
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[ Up ]
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</body>
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</html>
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