Add support for token env var (#137)

README.rst

@@ -198,13 +198,14 @@ Usage
      # connection_error_strategy [strict|skip|ignore] Choose how to handle connection errors
      # return_jira_metadata = False (return Jira issue with metadata instead of boolean result)
 
-   You can set the password and username fields by setting the PYTEST_JIRA_PASSWORD and PYTEST_JIRA_USERNAME
-   environment variables:
+   You can set the password and username fields by setting the PYTEST_JIRA_PASSWORD, PYTEST_JIRA_USERNAME and
+   PYTEST_JIRA_TOKEN environment variables:
 
     .. code:: sh
 
       export PYTEST_JIRA_PASSWORD="FOO"
       export PYTEST_JIRA_USERNAME="BAR"
+      export PYTEST_JIRA_TOKEN="TOKEN"
 
    Configuration options can be overridden with command line options as well.
    For all available command line options run following command.

pytest_jira.py

@@ -31,6 +31,7 @@
 PLUGIN_NAME = "jira_plugin"
 PASSWORD_ENV_VAR = 'PYTEST_JIRA_PASSWORD'
 USERNAME_ENV_VAR = 'PYTEST_JIRA_USERNAME'
+TOKEN_ENV_VAR = 'PYTEST_JIRA_TOKEN'
 
 
 class JiraHooks(object):
@@ -549,7 +550,7 @@ def pytest_configure(config):
             os.getenv(USERNAME_ENV_VAR) or config.getvalue('jira_username'),
             os.getenv(PASSWORD_ENV_VAR) or config.getvalue('jira_password'),
             config.getvalue('jira_verify'),
-            config.getvalue('jira_token'),
+            os.getenv(TOKEN_ENV_VAR) or config.getvalue('jira_token'),
         )
         jira_marker = JiraMarkerReporter(
             config.getvalue('jira_marker_strategy'),