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/*!
    \contentspage{index.html}{Qt Installer Framework}
    \previouspage scripting.html
    \page operations.html
    \nextpage ifw-tools.html

    \title Operations

    The operations are prepared by component and controller scripts and performed by the
    installer.
    \note Operations are performed threaded.

    Internally, each operation has a \e DO step that contains instructions for
    the installer and an \e UNDO step that contains instructions for the
    uninstaller.

    \section1 Summary of Operations

    The following table summarizes the available operations and their syntax.

    \table
        \header
            \li Operation
            \li Syntax
            \li Use
        \row
            \li Copy
            \li "Copy" \c source \c target
            \li Copies a file from \c source to \c target.
        \row
            \li Move
            \li "Move" \c source \c target
            \li Moves a file from \c source to \c target.
        \row
            \li SimpleMoveFile
            \li "SimpleMoveFile" \c source \c target
            \li Moves a file from \c source to \c target.
        \row
            \li Delete
            \li "Delete" \c filename
            \li Deletes the file specified by \c filename.
        \row
            \li Mkdir
            \li "Mkdir" \c path
            \li Creates the directory path \c path.
        \row
            \li Rmdir
            \li "Rmdir" \c path
            \li Removes the directory path \c path.
        \row
            \li CopyDirectory
            \li "CopyDirectory" \c sourcePath \c targetPath
            \li Copies a directory from \c sourcePath to \c targetPath.
        \row
            \li AppendFile
            \li "AppendFile" \c filename \c text
            \li Appends \c text to the file specified by \c filename. \c text is
                treated as ASCII text.
        \row
            \li PrependFile
            \li "PrependFile" \c filename \c text
            \li Prepends \c text to the file specified by \c filename. \c text
                is treated as ASCII text.
        \row
            \li Replace
            \li "Replace" \c file \c search \ replace
            \li Opens \c file to find \c search string and replaces that with the \c replace string.
        \row
            \li LineReplace
            \li "LineReplace" \c file \c search \c replace
            \li Opens \c file to find lines that start with \c search string and
                replaces that with the \c replace string. Lines are trimmed before
                the search.
        \row
            \li Execute
            \li "Execute" [{\c exitcodes}] \c command [\c parameter1 [\c parameter... [\c parameter10]]]
            \li Executes the command specified by \c command. Up to 10
                parameters can be passed. If that is not enough, you can use a JavaScript string array.

                Optionally, you can pass a comma-separated list of exit codes
                within curly brackets ({}) as the first argument to specify the
                exit codes for successful execution. This defaults to "{0}".

                Other optional named arguments are: "workingdirectory=<your_working_dir>";
                "errormessage=<your_custom_errormessage>"

                In addition, a special argument, UNDOEXECUTE, separates the DO step of the operation
                from the UNDO step.

                Example:
                \c{component.addOperation("Execute", "touch", "test.txt", "UNDOEXECUTE", "rm", "test.txt")}
        \row
            \li CreateShortcut
            \li "CreateShortcut" \c filename \c linkname [\c arguments]
            \li Creates a shortcut from the file specified by \c filename to
                \c linkname.
                On Windows, this creates a .lnk file which can have
                \c arguments. Furthermore, on Windows, \c filename can be
                an HTTP or FTP URL in which case a URL shortcut is created.
                On Unix, this creates a symbolic link.
        \row
            \li CreateDesktopEntry
            \li "CreateDesktopEntry" \c {filename "key=value[ key2=value2[ key3=value3]]]"}
            \li Creates a .desktop initialization file, as specified by
                freedesktop.org.

                If \c filename is absolute, the desktop entry is stored there.
                Otherwise, it is stored in the location specified in
                \c{$XDG_DATA_HOME/applications}, including the default path,
                as defined by freedesktop.org.

                The key-value pairs are written to the file.

                The file is set to use UTF-8 encoding.
        \row
            \li InstallIcons
            \li "InstallIcons" \c directory \c [Vendorprefix]
            \li Installs the contents of \c directory into a location, as
                specified by freedesktop.org. That is, into
                \c {$XDG_DATA_HOME/icons} or
                \c {$HOME/.local/share/icons}. The files are removed from their initial
                location. Make sure to add this operation after the operation
                that extracts the files from the archive.
                If you provide a \c Vendorprefix it replaces all characters up to the
                first dash (-) in the filename of the icon with this prefix.
        \row
            \li Extract
            \li "Extract" \c archive \c targetdirectory
            \li Extracts \c archive to \c targetdirectory.

        \row
            \li GlobalConfig
            \li "GlobalConfig" \c company \c application \c key \c value

                or

                "GlobalConfig" \c scope \c company \c application \c key \c value

                or

                "GlobalConfig" \c filename \c key \c value
            \li Stores \c value for \c key in a configuration file. The
                configuration file is specified either by \c filename
                (using \c QSettings::NativeFormat, which might be the Windows
                registry) or by \c application and \c company name. Set \c scope
                to "SystemScope" to create an entry in the system scope.

                \note The operation is using QSettings to store the key value pair. QSettings
                always treats backslash as a special character and provides no API for reading
                or writing such entries. Do not use slashes ('/' and '\\') in section or key names;
                the backslash character is used to separate sub keys. On windows, '\\' are converted
                by QSettings to '/', which makes them identical. Because the backslash character is
                used by QSettings to separate sub keys, you cannot read or write windows registry
                entries that contain slashes or backslashes. You should use a native windows API if
                you need to do so.
        \row
            \li EnvironmentVariable
            \li "EnvironmentVariable" \c key \c value [\c persistent [\c system]]
            \li Sets the environment variable \c key to \c value. If
                \c persistent is set to \c true, the variable is set
                persistently. This is currently only supported on Windows.
                If \c system is set to \c true, the persistent variable is set
                system-wide, not only for the current user.
        \row
            \li RegisterFileType
            \li "RegisterFileType" \c extension \c command [\c description [\c contentType [\c icon]]].
            \li Registers the file type with \c extension to be opened via
                \c command. Optionally, you can specify \c description,
                \c contentType, and \c icon. This is currently only supported on
                Windows.
        \row
            \li ConsumeOutput
            \li "ConsumeOutput" \c installerKeyName \c executablePath \c processArguments
            \li Saves the output from running the executable located at
                \c executablePath with the arguments \c processArguments to the
                installer key specified by \c installerKeyName. Additional
                arguments can be passed.
        \row
            \li CreateLink
            \li "CreateLink" \c linkPath \c targetPath
            \li Creates a link from the location specified by \c linkPath to
                the location specified by \c targetPath.
        \row
            \li CreateLocalRepository
            \li "CreateLocalRepository" \c binaryPath \c repoPath
            \li Creates a local repository in the directory specified by
                \c repoPath. For offline installers, stores binary data in the
                directory specified by \c binaryPath.
        \row
            \li FakeStopProcessForUpdate
            \li "FakeStopProcessForUpdate" \c processlist
            \li Matches running processes against the comma-separated entries in \c processlist
                during uninstallation. If matches are found, shows a messagebox asking the user
                to stop those processes before continuing.
        \row
            \li License
            \li "License" \c licenses
            \li Copies the license files specified by \c licenses to a subfolder called \c Licenses
                in the target directory. This operation is automatically added for packages
                declaring \c <Licenses> in their package description file.
        \row
            \li MinimumProgress
            \li "MinimumProgress"
            \li Increases the progress value by one.
        \row
            \li SelfRestart
            \li "SelfRestart" \c core
            \li Restarts the updater or package manager specified by \c core.
        \row
            \li Settings
            \li "Settings" \c path \c method \c key \c aValue
            \li Sets or removes the value \c aValue of \c key in the settings file
                or registry located at \c path, depending on the value of
                \c method: \c set, \c remove, \c add_array_value, and \c remove_array_value.
    \endtable

    The Extract, License, and MinimumProgress operations are automatically added for matching
    components that do not overwrite the component::createOperations() method. See also
    component::autoCreateOperations.

    If errors occur, you can test operations manually using the \c devtool. However,
    variables are not resolved, so you need to use absolute values.

    For example, to test copying a file:
    \code
    devtool --operation DO,Copy,<source>,<target>
    \endcode

*/
