Add otelcol shortcut to elastic-agent otel (#4816)

Author: nchaulet

changelog/fragments/1717077736-otelcol-shortcut.yaml

@@ -0,0 +1,31 @@
+# Kind can be one of:
+# - breaking-change: a change to previously-documented behavior
+# - deprecation: functionality that is being removed in a later release
+# - bug-fix: fixes a problem in a previous version
+# - enhancement: extends functionality but does not break or fix existing behavior
+# - feature: new functionality
+# - known-issue: problems that we are aware of in a given version
+# - security: impacts on the security of a product or a user’s deployment.
+# - upgrade: important information for someone upgrading from a prior version
+# - other: does not fit into any of the other categories
+kind: feature
+
+# Change summary; a 80ish characters long description of the change.
+summary: Add otelcol shortuct to elastic-agent otel
+
+# Long description; in case the summary is not enough to describe the change
+# this field accommodate a description without length limits.
+# NOTE: This field will be rendered only for breaking-change and known-issue kinds at the moment.
+#description:
+
+# Affected component; usually one of "elastic-agent", "fleet-server", "filebeat", "metricbeat", "auditbeat", "all", etc.
+component: elastic-agent
+
+# PR URL; optional; the PR number that added the changeset.
+# If not present is automatically filled by the tooling finding the PR where this changelog fragment has been added.
+# NOTE: the tooling supports backports, so it's able to fill the original PR number instead of the backport PR number.
+# Please provide it if you are adding a fragment for a different PR.
+pr: https://github.com/elastic/elastic-agent/pull/4816
+# Issue URL; optional; the GitHub issue related to this changeset (either closes or is part of).
+# If not present is automatically filled by the tooling with the issue linked to the PR number.
+#issue: https://github.com/owner/repo/1234

dev-tools/packaging/files/darwin/otelcol.sh

@@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+
+BASEDIR=$(dirname "$0")
+
+exec "$BASEDIR/elastic-agent" otel "$@"

dev-tools/packaging/files/linux/otelcol.sh

@@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+
+BASEDIR=$(dirname "$0")
+
+exec "$BASEDIR/elastic-agent" otel "$@"

dev-tools/packaging/files/windows/otelcol.ps1

@@ -0,0 +1,2 @@
+$workdir = Split-Path $MyInvocation.MyCommand.Path
+& "$workdir\elastic-agent" otel $args

dev-tools/packaging/packages.yml

@@ -134,6 +134,14 @@ shared:
         mode: 0755
         config_mode: 0644
         skip_on_missing: true
+  
+  - &linux_otel_files
+    'otelcol':
+      source: '{{ repo.RootDir }}/dev-tools/packaging/files/linux/otelcol.sh'
+      mode: 0755
+    'data/{{.BeatName}}-{{ commit_short }}/otelcol':
+      source: '{{ repo.RootDir }}/dev-tools/packaging/files/linux/otelcol.sh'
+      mode: 0755
 
   - &agent_binary_common_files
     LICENSE.txt:
@@ -201,6 +209,12 @@ shared:
       content: >
         {{ agent_package_version }}
       mode: 0644
+    'otelcol':
+      source: '{{ repo.RootDir }}/dev-tools/packaging/files/darwin/otelcol.sh'
+      mode: 0755
+    'data/{{.BeatName}}-{{ commit_short }}/otelcol':
+      source: '{{ repo.RootDir }}/dev-tools/packaging/files/darwin/otelcol.sh'
+      mode: 0755
     <<: *agent_darwin_app_bundle_files
     <<: *agent_binary_common_files
 
@@ -217,6 +231,7 @@ shared:
     files:
       <<: *agent_binary_files
       <<: *agent_components
+      <<: *linux_otel_files
 
 
   - &agent_darwin_binary_spec
@@ -235,6 +250,12 @@ shared:
         mode: 0755
         config_mode: 0644
         skip_on_missing: true
+      'otelcol.ps1':
+        source: '{{ repo.RootDir }}/dev-tools/packaging/files/windows/otelcol.ps1'
+        mode: 0755
+      'data/{{.BeatName}}-{{ commit_short }}/otelcol.ps1':
+        source: '{{ repo.RootDir }}/dev-tools/packaging/files/windows/otelcol.ps1'
+        mode: 0755
 
   - &agent_docker_spec
     <<: *agent_binary_spec