This plugin defines an ExtensionPoint that can be used by plugins to define new Run Conditions and to use Run Conditions to decide whether to run a build step.
This plugin defines a few core Run Conditions:
- Always / Never
The always and Never conditions can be used to disable a build step from the job configuration without losing the current configuration for that build step - Boolean condition
Run the step if a token expands to a representation of true (or the string "run") - Current status
Run the build step if the current build status is within the configured range - File exists / Files match
Run the step if a file exists, or at least one file matches a pattern. - Strings match
Run if the two strings are the same - Numerical comparison
Run the build step depending on the result of comparing two numbers. Very useful with tokens provided by the "Static Code Analysis Plug-ins" that were integrated into the Warnings Next Generation - Regular expression match
Provide a regular expression and a label. The build step will run if the expression matches the label. Both the expression and the label are expanded with the Token Macro Plugin enabling a dynamic (parameterized) regex, label or both. - Time / Day of week
Only run during a specified period of the day, or day of the week. - And / Or / Not
Logical operations to enable the combining and sense inversion of Run Conditions - Build Cause
Run the build step depending on the cause of the build e.g. triggered by timer, user, scm-change,... - Script Condition
Use shell script to decide whether a step should be skipped - Windows Batch Condition
Use windows batch to decide whether a step should be skipped
- Build Keeper Plugin — Select a policy for automatically marking builds as "keep forever" to enable long term analysis trending when discarding old builds - or use to protect logs and artifacts from certain builds
- Conditional BuildStep Plugin — A buildstep wrapping any number of other buildsteps, controlling their execution based on a defined condition.
- Run Condition Extras Plugin — This plugin provides additional run conditions and integrations for Run Condition Plugin
This plugin is used by other plugins and will be installed automatically when one of those is installed from the Update Center.
To install manually, download the latest plugin from http://mirrors.jenkins-ci.org/plugins/run-condition/ and use the Upload Plugin option in the Advanced tab of the Plugin Manager.
If you do install manually, you will need to also install the Token Macro Plugin from http://mirrors.jenkins-ci.org/plugins/token-macro/.
... this one gets executed if 'SOME_ENV' (any environment variable) matches the string 'MyEnvValue'. As any build parameter gets exposed as an environment variable, the value can be controlled by a parameter.
Use the logical Not condition, and inside, select File exists
I.e. Set string parameter on a parameterized build to ^(UAT|DEMO)$ to run all steps that are labeled with either DEMO or UAT
Add an And condition and then add Time and Day of week conditions to it
This plugin provides an ExtensionPoint which enables other plugins to provide new Run Conditions to plugins that use them.
There is an example plugin on GitHub. 
This is the RunCondition ExtensionPoint.
This one file contains all of the java code in the Example plugin.
And this is the XML for the view
For recent versions, see GitHub Releases
For versions 1.0 and older, see the CHANGELOG.md