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I have a requirement wherein I wanted to put some user defined tags in jar manifest file. I was wondering if it is possible to do so?
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To modify the manifest, you must first prepare a text file containing the information you wish to add to the manifest. You then use the Jar tool's m option to add the information in your file to the manifest. Warning: The text file from which you are creating the manifest must end with a new line or carriage return.
The manifest file is named MANIFEST. MF and is located under the META-INF directory in the JAR. It's simply a list of key and value pairs, called headers or attributes, grouped into sections.
I was wondering if it is possible to do so?
Yes.
If yes, any example?
silly-word: supercalafragilisticexpyaladocious
Custom enough for you?
See specifically the JAR File Specification: Manifest Specification for details on attributes and values.
- manifest-file: main-section newline *individual-section
- main-section: version-info newline *main-attribute
- version-info: Manifest-Version : version-number
- version-number : digit+{.digit+}*
- main-attribute: (any legitimate main attribute) newline
- individual-section: Name : value newline *perentry-attribute
- perentry-attribute: (any legitimate perentry attribute) newline
- newline : CR LF | LF | CR (not followed by LF)
- digit: {0-9}
In the above specification, attributes that can appear in the main section are referred to as main attributes, whereas attributes that can appear in individual sections are referred to as per-entry attributes. Certain attributes can appear both in the main section and the individual sections, in which case the per-entry attribute value overrides the main attribute value for the specified entry. The two types of attributes are defined as follows. ..
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