Update CHANGELOG.md

Fixes #83 (hopefully)

CHANGELOG.md

@@ -14,6 +14,7 @@ represented by the pull requests that fixed them. Critical items to know are:
 Versions correspond with GitHub releases that can be referenced with @ using actions.
 
 ## [master](https://github.com/vsoch/pull-request-action/tree/master) (master)
+  - bugfix of writing to environment file (missing newline) (1.0.19)
   - bugfix of missing from branch with scheduled run (1.0.16)
   - forgot to add assignees (1.0.15)
   - output and environment variables for PR number and return codes (1.0.5)

README.md

@@ -50,10 +50,10 @@ Unlike standard actions, this action just uses variables from the environment.
 | PULL_REQUEST_ASSIGNEES | A list (string with spaces) of users to assign | false | unset |
 | PULL_REQUEST_REVIEWERS | A list (string with spaces) of users to assign review | false | unset |
 | PULL_REQUEST_TEAM_REVIEWERS | A list (string with spaces) of teams to assign review | false | unset |
-| PASS_ON_ERROR | Instead of failing on an error response, pass | unset |
+| PASS_ON_ERROR | Instead of failing on an error response, pass | false | unset |
-| PASS_IF_EXISTS | Instead of failing if the pull request already exists, pass | unset |
+| PASS_IF_EXISTS | Instead of failing if the pull request already exists, pass | false | unset |
-| PULL_REQUEST_UPDATE | If the pull request already exists, update it | unset |
+| PULL_REQUEST_UPDATE | If the pull request already exists, update it | false | unset |
-| PULL_REQUEST_STATE | If `PULL_REQUEST_UPDATE` is true, update to this state (open, closed) | open |
+| PULL_REQUEST_STATE | If `PULL_REQUEST_UPDATE` is true, update to this state (open, closed) | false |open |
 
 For `PULL_REQUEST_DRAFT`, `PASS_ON_ERROR`, `PASS_IF_EXISTS`, and `MAINTAINER_CANT_MODIFY`, these are
 treated as environment booleans. If they are defined in the environment, they trigger the

pull-request.py

@@ -79,7 +79,7 @@ def set_env(name, value):
     environment_file_path = os.environ.get("GITHUB_ENV")
 
     with open(environment_file_path, "a") as environment_file:
-        environment_file.write("%s=%s" % (name, value))
+        environment_file.write("%s=%s\n" % (name, value))
 
 
 def open_pull_request(title, body, target, source, is_draft=False, can_modify=True):
@@ -234,6 +234,21 @@ def find_pull_request(listing, source):
                 return entry
 
 
+def find_default_branch():
+    """Find default branch for a repo (only called if branch not provided)"""
+    response = requests.get(REPO_URL)
+
+    # Case 1: 404 might need a token
+    if response.status_code == 404:
+        response = requests.get(REPO_URL, headers=HEADERS)
+    if response.status_code != 200:
+        abort_if_fail(response, "Unable to retrieve default branch")
+
+    default_branch = response.json()["default_branch"]
+    print("Found default branch: %s" % default_branch)
+    return default_branch
+
+
 def add_reviewers(entry, reviewers, team_reviewers):
     """Given regular or team reviewers, add them to a PR.
 
@@ -267,7 +282,9 @@ def add_reviewers(entry, reviewers, team_reviewers):
 ################################################################################
 
 API_VERSION = "v3"
-BASE = "https://api.github.com"
+
+# Allow for a GitHub enterprise URL
+BASE = os.environ.get("GITHUB_API_URL") or "https://api.github.com"
 
 PR_TOKEN = os.environ.get("PULL_REQUEST_TOKEN") or get_envar("GITHUB_TOKEN")
 PR_REPO = os.environ.get("PULL_REQUEST_REPOSITORY") or get_envar("GITHUB_REPOSITORY")
@@ -343,8 +360,8 @@ def main():
     if not branch_prefix:
         print("No branch prefix is set, all branches will be used.")
 
-    # Default to master to support older, will eventually change to main
+    # Default to project default branch if none provided
-    pull_request_branch = os.environ.get("PULL_REQUEST_BRANCH", "master")
+    pull_request_branch = os.environ.get("PULL_REQUEST_BRANCH", find_default_branch())
     print("Pull requests will go to %s" % pull_request_branch)
 
     # Pull request draft