Doc: Set version attribute in plugin source file (#308)

Update links to long format to pick up version
Bump to v4.4.1

Note that we're resetting the version attribute to `current` at the end of the file to avoid carry over to other files. After we resolve formatting and clean up older files, we can remove the reset in the source file.

Author: karenzone

Diff for: CHANGELOG.md

@@ -1,5 +1,6 @@
-## Unreleased
+## 4.4.1
   - Fix: update to Gradle 7 [#305](https://github.com/logstash-plugins/logstash-input-file/pull/305)
+  - [DOC] Add version attributes to doc source file [#308](https://github.com/logstash-plugins/logstash-input-file/pull/308)
 
 ## 4.4.0
   - Add support for ECS v8 [#301](https://github.com/logstash-plugins/logstash-input-file/pull/301)

Diff for: docs/index.asciidoc

@@ -9,6 +9,11 @@ START - GENERATED VARIABLES, DO NOT EDIT!
 :release_date: %RELEASE_DATE%
 :changelog_url: %CHANGELOG_URL%
 :include_path: ../../../../logstash/docs/include
+
+ifeval::["{versioned_docs}"=="true"]
+:branch: %BRANCH%
+:ecs_version: %ECS_VERSION%
+endif::[]
 ///////////////////////////////////////////
 END - GENERATED VARIABLES, DO NOT EDIT!
 ///////////////////////////////////////////
@@ -82,7 +87,7 @@ was not ideal and a dedicated Read mode is an improvement.
 ==== Compatibility with the Elastic Common Schema (ECS)
 
 This plugin adds metadata about event's source, and can be configured to do so
-in an {ecs-ref}[ECS-compatible] way with <<plugins-{type}s-{plugin}-ecs_compatibility>>.
+in an https://www.elastic.co/guide/en/ecs/{ecs_version}/index.html[ECS-compatible] way with <<plugins-{type}s-{plugin}-ecs_compatibility>>.
 This metadata is added after the event has been decoded by the appropriate codec,
 and will never overwrite existing values.
 
@@ -270,7 +275,7 @@ In practice, this will be the best case because the time taken to read new conte
 ** Otherwise, the default value is `disabled`.
 
 Controls this plugin's compatibility with the
-{ecs-ref}[Elastic Common Schema (ECS)].
+https://www.elastic.co/guide/en/ecs/{ecs_version}/index.html[Elastic Common Schema (ECS)].
 
 [id="plugins-{type}s-{plugin}-exclude"]
 ===== `exclude`
@@ -426,7 +431,7 @@ of `/var/log` will be done for all `*.log` files.
 Paths must be absolute and cannot be relative.
 
 You may also configure multiple paths. See an example
-on the {logstash-ref}/configuration-file-structure.html#array[Logstash configuration page].
+on the https://www.elastic.co/guide/en/logstash/{branch}/configuration-file-structure.html#array[Logstash configuration page].
 
 [id="plugins-{type}s-{plugin}-sincedb_clean_after"]
 ===== `sincedb_clean_after`
@@ -439,7 +444,7 @@ The sincedb record now has a last active timestamp associated with it.
 If no changes are detected in a tracked file in the last N days its sincedb
 tracking record expires and will not be persisted.
 This option helps protect against the inode recycling problem.
-Filebeat has a {filebeat-ref}/inode-reuse-issue.html[FAQ about inode recycling].
+Filebeat has an https://www.elastic.co/guide/en/beats/filebeat/{branch}}/inode-reuse-issue.html[FAQ about inode recycling].
 
 [id="plugins-{type}s-{plugin}-sincedb_path"]
 ===== `sincedb_path`
@@ -533,4 +538,9 @@ Supported values: `us` `usec` `usecs`, e.g. "600 us", "800 usec", "900 usecs"
 [NOTE]
 `micro` `micros` and `microseconds` are not supported
 
+ifeval::["{versioned_docs}"=="true"]
+:branch: current
+:ecs_version: current
+endif::[]
+
 :default_codec!:

Diff for: logstash-input-file.gemspec

@@ -1,7 +1,7 @@
 Gem::Specification.new do |s|
 
   s.name            = 'logstash-input-file'
-  s.version         = '4.4.0'
+  s.version         = '4.4.1'
   s.licenses        = ['Apache-2.0']
   s.summary         = "Streams events from files"
   s.description     = "This gem is a Logstash plugin required to be installed on top of the Logstash core pipeline using $LS_HOME/bin/logstash-plugin install gemname. This gem is not a stand-alone program"