propertyfileSupports patching/merging and explicit editing of properties and options configuration files. Includes support for comments (
#), and auto-numbered properties.
The processing engine for property files is an integrated version of the ini4j framework. The options for attributes and nested elements reflect the functionality of this framework. The
<propertyfile> configuration type can be used to patch or update a single configuration file, or to patch a fileset of property files against a target directory containing property files. Manual definition of key/value entries is supported by using the
<entry> element. Modifications can also be made or restricted by looking up entries by value, supporting regular expressions as well as plain string matching.
Attributes marked ini4j expose features of the underlying ini4j framework. See the ini4j documentation for fuller details.
|fromfile||The source file containing the original configuration.||No. Patching destinations can also be updated by manual definition using nested |
|tofile||The file to patch to.|
Exactly one of these is required.
Similar to the Ant copy task,
|todir||The directory to patch to.|
|targetfile||An alternative file to write the patched configuration to.||No. When specified, |
|preservelastmodified||Give the new configuration file(s) the same last-modified time as the original source file(s).||No; defaults to false.|
|overwrite||Allow existing destination files to be overwritten.||No; defaults to false. If |
|create||Allow destination files to be created where they don't already exist.||No; defaults to true. If |
|cleanup||Deletes original configuration file(s) after new patched file(s) is/are successfully written. If any destination or target file could not be processed or written for any reason, the original file is never deleted, even if this is set to true.||No; defaults to false.|
|failonerror||If false, the listener will try to continue processing remaining actions even when errors in reading, processing, or writing files occur. Instead of immediately failing, a warning message is written to the log.||No; defaults to true.|
|enablemultiplemappings||If true the task will process to all the mappings for a given source path. If false the task will only process the first file or directory. This attribute is only relevant if there is a mapper subelement.||No; defaults to false.|
|condition||Specifies the name of an IzPack installer condition that must be fulfilled before the configuration is executed.||No.|
|keepOldKeys (ini4j)||Whether to generally preserve entries with the same name (but not necessarily the same value) from the source configuration file, if they can be found.|
|No; defaults to true.|
|keepOldValues (ini4j)||Whether to preserve the values of equal entries from an old configuration, if they can be found.|
Set false to overwrite old configuration values by default with the new ones, regardless whether they have been already set in an old configuration. Values from an old configuration can only be preserved, if the appropriate entries exist in an old configuration. Manual
|No; defaults to true.|
|escape (ini4j)||Whether to parse the following sequences as escape characters (and write them accordingly to the target file) when they appear in a parsed configuration file:||No; defaults to true.|
|escapeNewLine (ini4j)||When true, lines are concatenated as far as the last character before the line break backslash ('\'). In this case the trailing line break is omitted, interpreting several lines ending on '\' as a single "long" line.||No; defaults to true.|
|headerComment (ini4j)||Allows header comments in the file. If this is true, the comment before the first entry is treated as the global header comment for the whole file, not logically assigning this comment to the first option itself. The header comment might be internally overwritten separately, and is separated using a newline||No; defaults to false.|
|emptyLines (ini4j)||Preserves empty lines. If false, empty lines in configuration files are discarded when saving the file.||No; defaults to true.|
Set this option to override the default operator key-value assignment operator.
When a file is parsed, the first occurrence of the
|No; defaults to |
|resolveExpressions (ini4j)||Whether ini4j expressions should be resolved when a configuration is being patched. This is not the same as substituting IzPack variables, but resolves references to configuration entries in the same configuration file. See [ini4j] - Expression handling.|
The following nested elements can be specified to create manual definitions, or to define bulk patching operations.
<entry> is used to override the definition of a certain configuration key and its value against the default behaviour defined with action-global attributes or their ini4j defaults. An
entry can even be used without the
fromfile attribute simply to modify the target configuration file with explicit values. Further, an entire configuration file can be defined entirely using
<entry> elements where
tofile did not previously exist.
For property/options files, the
<entry> task supports modification of configuration properties based on string-matching against property values. This is particularly useful for modifying options files, where a single key may have a collection of values, but applies equally to plain
key = value properties.
In this example, the property
fruit.bowl is a collection of four values. Using the lookup-by-value feature, one could use the regular expression value
".*berry" to match only property values
3, or the plain lookup value
"date" to match only value
4, e.g. for a
keep operation. In this case, only the matched values (of which there may be none) would be removed, or preserved from an original configuration. See the
lookupType parameter for lookup options.
The same principle applies to an assignment or calculation operation (i.e.
-), so that a specific value (or values) could be replaced or modified. Where a match is found in this case, the matched value(s) are replaced/modified by the specified
default value for the
<entry>. Where no matching key is found, the specified
default, when specified) is inserted into the property file. In this way, the 'normal' set, increment, and decrement operations can be performed as expected. See the Examples section for sample config.
|key||The property key to deal with. If this ends with a dot ||Yes.|
The new value to set the property key to.
A fallback value to set the property key to if no other definition can be found, i.e. if parameter
Where no previous value is defined, defaults to
|dataType||Instructs that entry values be treated as a certain data type during processing. Support currently exists for treating a property value as a date or an integer, instead of as a plain string. Can be used with the ||No; defaults to |
Overrides global patching behavior for specific entries, or allows basic calculations for numeric data types (i.e.
Entries can be removed from the property file by specifying
|No; defaults to |
The lookup type to use when it is intended that the key/value property (or properties) should be selected for modification according to their value. The match string should be specified in the
Supported lookup types are plain string comparison (case-sensitive) and Java-style regular expression.
|No; defaults to |
|unit||Defines the date component to modify when |
No; defaults to
|pattern||For numeric data types, a string formatting pattern can be specified using conventional Java formatting placeholders. This defines both the input parsing and output formatting pattern for this entry. See javadoc for DecimalFormat (applies to |
No. The default pattern for
Specifies patch source files using one or Ant-style
<fileset> elements. See the description of the
<fileset> element. Cannot be used with the attribute
targetfile, or with any manual definition
Defines one or more file name transformations to apply to the configurable execution. See the description of the
<mapper> element. Only one mapper element can be used in a configurable (use
compositemapper to define a chain of transformations).
Merge the values from an existing file into a new version of the file, and overwrite the original file with the resulting properties. Preserve values from the original file for matching keys in the new file, but discard keys not found in the new file. Make an explicit exception for the key
allowLegacyOps - if specified in the original file, copy it to the new configuration even if it doesn't exist in the new file. Note the use of IzPack variable
INSTALL_PATH in the file path specs.
appVersion property in the
default section of an existing INI file, and increment the
configVersion property in the
appinfo section. Only make the modification if the IzPack condition
isUpgradeInstallation is fulfilled. Note the use of IzPack variables
Merge an existing file into a new version of the file, and overwrite the original file with the resulting properties. Copy keys only present in the original file into the new configuration, but do not preserve the values from the original file for keys present in both files. Make an explicit exception for original values of the property collection
java.class.path, but only for values in the collection that match the given which is regular expression (which is equivalent to
"**/plugins/*.jar"). This demonstrates lookup-by-value on an options file property with sequentially-numbered keys comprising a collection of values.
Replace the value of the property
gui.plaf.name with the alternative
"Standard", only if the current value is
"LegacyClassic". This demonstrates lookup-by-value on a regular single-key = single-value property.