Increment the build number of your project

Supported platforms ios, mac
Author @KrauseFx
Returns The new build number

4 Examples

increment_build_number # automatically increment by one
  build_number: "75" # set a specific number
  build_number: 75, # specify specific build number (optional, omitting it increments by one)
  xcodeproj: "./path/to/MyApp.xcodeproj" # (optional, you must specify the path to your main Xcode project if it is not in the project root directory)
build_number = increment_build_number


Key Description Default
build_number Change to a specific version. When you provide this parameter, Apple Generic Versioning does not have to be enabled
skip_info_plist Don't update Info.plist files when updating the build version false
xcodeproj optional, you must specify the path to your main Xcode project if it is not in the project root directory

* = default value is dependent on the user's system

Lane Variables

Actions can communicate with each other using a shared hash lane_context, that can be accessed in other actions, plugins or your lanes: lane_context[SharedValues:XYZ]. The increment_build_number action generates the following Lane Variables:

SharedValue Description
SharedValues::BUILD_NUMBER The new build number

To get more information check the Lanes documentation.


To show the documentation in your terminal, run

fastlane action increment_build_number


It is recommended to add the above action into your Fastfile, however sometimes you might want to run one-offs. To do so, you can run the following command from your terminal

fastlane run increment_build_number

To pass parameters, make use of the : symbol, for example

fastlane run increment_build_number parameter1:"value1" parameter2:"value2"

It's important to note that the CLI supports primitive types like integers, floats, booleans, and strings. Arrays can be passed as a comma delimited string (e.g. param:"1,2,3"). Hashes are not currently supported.

It is recommended to add all fastlane actions you use to your Fastfile.

Source code

This action, just like the rest of fastlane, is fully open source, view the source code on GitHub

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