[PATCHv2 4/5] systemd.bbclass: do not automatically add Also services

[Adrian Freihofer <adrian.freihofer@gmail.com>]

From: Adrian Freihofer <adrian.freihofer@siemens.com>

Starting a systemd service “Also” does not mean that both services
must be in the same package. However, the systemd.bbclass enforces
this.

Example:
  a.service:
    [Install]
    Also=b.service
If a.service is packed in package A, b.service is automatically packed
into package A as well. This happens even if b.service is explicitly
added to package B using FILES and SYSTEMD_SERVICE variables.

The automatic packing of socket files with the corresponding service
files is probably a widely used feature of systemd.bbclass. This bahavior
does not change.

Adding regular service files to a package just because it is another
service in the same package that "Also" uses the service is a bug that
this commit fixes.

Signed-off-by: Adrian Freihofer <adrian.freihofer@siemens.com>
---
 meta/classes-recipe/systemd.bbclass | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/meta/classes-recipe/systemd.bbclass b/meta/classes-recipe/systemd.bbclass
index be77da48125..4b4470b7b34 100644
--- a/meta/classes-recipe/systemd.bbclass
+++ b/meta/classes-recipe/systemd.bbclass
@@ -132,18 +132,18 @@ python systemd_populate_packages() {
                 # for *.service add *@.service
                 service_base = service.replace('.service', '')
                 systemd_add_files_and_parse(pkg_systemd, path, service_base + '@.service')
+                # Add the socket unit which is referred by the Also= in this service file to the same package.
+                with open(fullpath, 'r') as unit_f:
+                    for line in unit_f:
+                        if line.startswith('Also'):
+                            also_unit = line.split('=', 1)[1].strip()
+                            if also_unit.find('.socket') != -1:
+                                systemd_add_files_and_parse(pkg_systemd, path, also_unit)
             if service.find('.socket') != -1:
                 # for *.socket add *.service and *@.service
                 service_base = service.replace('.socket', '')
                 systemd_add_files_and_parse(pkg_systemd, path, service_base + '.service')
                 systemd_add_files_and_parse(pkg_systemd, path, service_base + '@.service')
-            # Add all units which have an Also= referring a unit in this package to this package as well.
-            with open(fullpath, 'r') as unit_f:
-                for line in unit_f:
-                    if line.startswith('Also'):
-                        also_unit = line.split('=', 1)[1].strip()
-                        bb.warn("also: %s" % also_unit)
-                        systemd_add_files_and_parse(pkg_systemd, path, also_unit)
 
     # Check service-files and call systemd_add_files_and_parse for each entry
     def systemd_check_services():
-- 
2.47.0