adds support for not condition in conditional_step

updated builders.py to support not condition for conditional_step

Change-Id: Icf6f07ab4a53655d8f52c8793478afd6d93ae75c

jenkins_jobs/modules/builders.py

@@ -850,6 +850,11 @@ def conditional_step(parser, xml_parent, data):
                            relative, it will be considered relative to
                            either `workspace`, `artifact-directory`,
                            or `jenkins-home`. Default is `workspace`.
+    not                Run the step if the inverse of the condition-operand
+                       is true
+
+                         :condition-operand: Condition to evaluate.  Can be
+                           any supported conditional-step condition.
     ================== ====================================================
 
     Example:
@@ -857,10 +862,13 @@ def conditional_step(parser, xml_parent, data):
     .. literalinclude:: \
     /../../tests/builders/fixtures/conditional-step-success-failure.yaml
        :language: yaml
+    .. literalinclude:: \
+    /../../tests/builders/fixtures/conditional-step-not-file-exists.yaml
+       :language: yaml
     """
-    def build_condition(cdata):
+    def build_condition(cdata, cond_root_tag):
         kind = cdata['condition-kind']
-        ctag = XML.SubElement(root_tag, condition_tag)
+        ctag = XML.SubElement(cond_root_tag, condition_tag)
         if kind == "always":
             ctag.set('class',
                      'org.jenkins_ci.plugins.run_condition.core.AlwaysRun')
@@ -938,6 +946,11 @@ def conditional_step(parser, xml_parent, data):
                 basedir_tag.set('class',
                                 'org.jenkins_ci.plugins.run_condition.common.'
                                 'BaseDirectory$JenkinsHome')
+        elif kind == "not":
+            ctag.set('class',
+                     'org.jenkins_ci.plugins.run_condition.logic.Not')
+            notcondition = cdata['condition-operand']
+            build_condition(notcondition, ctag)
 
     def build_step(parent, step):
         for edited_node in create_builders(parser, step):
@@ -962,7 +975,7 @@ def conditional_step(parser, xml_parent, data):
         steps_parent = root_tag
         condition_tag = "condition"
 
-    build_condition(data)
+    build_condition(data, root_tag)
     evaluation_classes_pkg = 'org.jenkins_ci.plugins.run_condition'
     evaluation_classes = {
         'fail': evaluation_classes_pkg + '.BuildStepRunner$Fail',

tests/builders/fixtures/conditional-step-not-file-exists.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<project>
+  <builders>
+    <org.jenkinsci.plugins.conditionalbuildstep.singlestep.SingleConditionalBuilder>
+      <condition class="org.jenkins_ci.plugins.run_condition.logic.Not">
+        <condition class="org.jenkins_ci.plugins.run_condition.core.FileExistsCondition">
+          <file>mytestfile</file>
+          <baseDir class="org.jenkins_ci.plugins.run_condition.common.BaseDirectory$Workspace"/>
+        </condition>
+      </condition>
+      <runner class="org.jenkins_ci.plugins.run_condition.BuildStepRunner$Fail"/>
+      <buildStep class="hudson.tasks.Shell">
+        <command>touch $WORKSPACE/mytestfile</command>
+      </buildStep>
+    </org.jenkinsci.plugins.conditionalbuildstep.singlestep.SingleConditionalBuilder>
+  </builders>
+</project>

tests/builders/fixtures/conditional-step-not-file-exists.yaml

@@ -0,0 +1,10 @@
+builders:
+      - conditional-step:
+          condition-kind: not
+          condition-operand:
+              condition-kind: file-exists
+              condition-filename: mytestfile
+              condition-basedir: workspace
+          steps:
+              - shell: "touch $WORKSPACE/mytestfile"
+