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condition: introduce ConditionVersion=/AssertVersion=

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Add a new condition wich checks against systemd version.
Change condition_test_kernel_version() into a generic condition_test_version()
so most of the code can be reused.

    $ systemctl --version
    systemd 258 (258~devel-g53ca5f6)

    $ systemd-analyze condition 'ConditionVersion=systemd>255'
    test.service: ConditionVersion=>255 succeeded.

    $ systemd-analyze condition 'ConditionVersion=systemd>260'
    test.service: ConditionVersion=>260 failed.

    $ systemd-analyze condition 'ConditionVersion=systemd>=258'
    test.service: ConditionVersion=>=258 succeeded.

    $ systemd-analyze condition 'ConditionVersion=systemd>=257.1'
    test.service: ConditionVersion=>=257.1 succeeded.

    $ uname -r
    6.12.13-200.fc41.aarch64

    $ systemd-analyze condition 'ConditionVersion=kernel > 4.4'
    test.service: ConditionVersion=kernel > 4.4 succeeded.

    $ systemd-analyze condition 'ConditionVersion=kernel > 6.20'
    test.service: ConditionVersion=kernel > 6.20 failed.

    $ systemd-analyze condition 'ConditionVersion=kernel < 9.0'
    test.service: ConditionVersion=kernel < 9.0 succeeded.
This commit is contained in:
Matteo Croce
2025-03-18 18:36:59 +09:00
committed by Yu Watanabe
parent f91273f4fc
commit c154bb65ad
14 changed files with 260 additions and 50 deletions
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man/systemd.unit.xml
+18
View File
@@ -1481,6 +1481,24 @@
</listitem>
</varlistentry>
<varlistentry>
<term><varname>ConditionVersion=</varname></term>
<listitem><para><varname>ConditionVersion=</varname> may be used to check whether a software
version matches a certain expression, or if prefixed with the exclamation mark, does not match.
The first argument is the software whose version has to be checked. Currently
<literal>kernel</literal> and <literal>systemd</literal> are supported. If this argument is
omitted, <literal>kernel</literal> is implied. The second argument must be a list
of (potentially quoted) expressions. Each expression starts with one of <literal>=</literal> or
<literal>!=</literal> for string comparisons, <literal>&lt;</literal>, <literal>&lt;=</literal>,
<literal>==</literal>, <literal>&lt;&gt;</literal>, <literal>&gt;=</literal>,
<literal>&gt;</literal> for version comparisons, or <literal>$=</literal>, <literal>!$=</literal>
for a shell-style glob match. If no operator is specified, <literal>$=</literal> is implied.</para>
<xi:include href="version-info.xml" xpointer="v258"/>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>ConditionCredential=</varname></term>