# Adapted from https://github.com/ruby-grape/danger/blob/master/Dangerfile

# Q: What is a Dangerfile, anyway? A: See http://danger.systems/

# ------------------------------------------------------------------------------

# Additional pull request data

# ------------------------------------------------------------------------------

project_name = github.pr_json["base"]["repo"]["name"]

pr_number = github.pr_json["number"]

pr_url = github.pr_json["_links"]["html"]["href"]

# ------------------------------------------------------------------------------

# What changed?

# ------------------------------------------------------------------------------

has_lib_changes = !git.modified_files.grep(/^lib/).empty?

has_test_changes = !git.modified_files.grep(/^test/).empty?

has_changelog_changes = git.modified_files.include?("CHANGELOG.md")

# ------------------------------------------------------------------------------

# You've made changes to lib, but didn't write any tests?

# ------------------------------------------------------------------------------

if has_lib_changes && !has_test_changes

warn("There are code changes, but no corresponding tests. " \

"Please include tests if this PR introduces any modifications in " \

"#{project_name}'s behavior.",

sticky: false)

end

# ------------------------------------------------------------------------------

# Have you updated CHANGELOG.md?

# ------------------------------------------------------------------------------

if !has_changelog_changes && has_lib_changes

markdown <<-MARKDOWN

Here's an example of a CHANGELOG.md entry (place it immediately under the `* Your contribution here!` line):

```markdown

* [##{pr_number}](#{pr_url}): #{github.pr_title} - [@#{github.pr_author}](https://github.com/#{github.pr_author}).

```

MARKDOWN

warn("Please update CHANGELOG.md with a description of your changes. " \

"If this PR is not a user-facing change (e.g. just refactoring), " \

"you can disregard this.", sticky: false)

end

# ------------------------------------------------------------------------------

# Did you remove the CHANGELOG's "Your contribution here!" line?

# ------------------------------------------------------------------------------

if has_changelog_changes && File.read("CHANGELOG.md").scan(/^\s*[-*] Your contribution here/i).count < 3

raise(

"Please put the `- Your contribution here!` line back into CHANGELOG.md.",

sticky: false

)

end