Merging upstream version 0.16.0.

Signed-off-by: Daniel Baumann <daniel@debian.org>

docs/configuration.md

@@ -52,6 +52,12 @@ ignore-stdin=true
 # commit message to gitlint via stdin or --commit-msg. Disabled by default.
 staged=true
 
+# Hard fail when the target commit range is empty. Note that gitlint will
+# already fail by default on invalid commit ranges. This option is specifically
+# to tell gitlint to fail on *valid but empty* commit ranges.
+# Disabled by default.
+fail-without-commits=true
+
 # Enable debug mode (prints more output). Disabled by default.
 debug=true
 
@@ -128,7 +134,7 @@ ignore=T1,body-min-length
 [ignore-by-body]
 # Ignore certain rules for commits of which the body has a line that matches a regex
 # E.g. Match bodies that have a line that that contain "release"
-# regex=(.*)release(.*)
+regex=(.*)release(.*)
 #
 # Ignore certain rules, you can reference them by their id or by their full name
 # Use 'all' to ignore all rules
@@ -139,6 +145,15 @@ ignore=T1,body-min-length
 # E.g. Ignore all lines that start with 'Co-Authored-By'
 regex=^Co-Authored-By
 
+[ignore-by-author-name]
+# Ignore certain rules for commits of which the author name matches a regex
+# E.g. Match commits made by dependabot
+regex=(.*)dependabot(.*)
+
+# Ignore certain rules, you can reference them by their id or by their full name
+# Use 'all' to ignore all rules
+ignore=T1,body-min-length
+
 # This is a contrib rule - a community contributed rule. These are disabled by default.
 # You need to explicitly enable them one-by-one by adding them to the "contrib" option
 # under [general] section above.
@@ -363,6 +378,30 @@ GITLINT_STAGED=1 gitlint       # using env variable
 staged=true
 ```
 
+### fail-without-commits
+
+Hard fail when the target commit range is empty. Note that gitlint will
+already fail by default on invalid commit ranges. This option is specifically
+to tell gitlint to fail on **valid but empty** commit ranges.
+
+Default value  |  gitlint version | commandline flag  | environment variable   
+---------------|------------------|---------------------------|-----------------------
+ false         | >= 0.15.2        | `--fail-without-commits`  | `GITLINT_FAIL_WITHOUT_COMMITS`
+
+#### Examples
+```sh
+# CLI
+# The following will cause gitlint to hard fail (i.e. exit code > 0)
+# since HEAD..HEAD is a valid but empty commit range. 
+gitlint --fail-without-commits --commits HEAD..HEAD
+GITLINT_FAIL_WITHOUT_COMMITS=1 gitlint       # using env variable
+```
+```ini
+#.gitlint
+[general]
+fail-without-commits=true
+```
+
 ### ignore-stdin
 
 Ignore any stdin data. Sometimes useful when running gitlint in a CI server.