docs: add terse distribution porting guide

diff --git a/DISTRO_PORTING b/DISTRO_PORTING
new file mode 100644 (file)
index 0000000..4190538
--- /dev/null
+++ b/DISTRO_PORTING
@@ -0,0 +1,36 @@
+Porting systemd To New Distributions
+
+        You need to make the follow changes to adapt systemd to your
+        distribution:
+
+        0) Make your distribution recognized via the autoconf checks
+        in configure.ac. Grep for the word "fedora" (case
+        insensitively) and you should be able to find the places where
+        you need to add/change things.
+
+        1) Patch src/hostname-setup.c so that systemd knows where to
+        read your host name from.
+
+        2) Check the unit files in units/ if they match your
+        distribution. Most likely you will have to make additions to
+        units/*.m4 and create a copy of units/fedora/ with changes for
+        your distribution.
+
+        3) Adjust Makefile.am to register the unit files you added in
+        step 2. Also you might need to update the m4 invocation in
+        Makefile.am. Grep for the word "fedora" (case insensitively)
+        and you should be able to find the places where you need to
+        add/change things.
+
+        4) Try it out.
+
+CONTRIBUTING UPSTREAM:
+
+        We are interested in merging your changes upstream, if they
+        are for a big, and well-known distribution. Unfortunately we
+        don't have the time and resources to maintain
+        distribution-specific patches for all distributions on the
+        planet, hence please do not send us patches that adds systemd
+        support to non-mainstream or niche distributions.
+
+        Thank you for understanding.

diff --git a/Makefile.am b/Makefile.am
index 973c08e4cee4a4a6fa08e7d056c3ac8946a059c4..683a00bc0c02f30162db1dbe058743e2ea4a6920 100644 (file)
--- a/Makefile.am
+++ b/Makefile.am
@@ -102,7 +102,8 @@ EXTRA_DIST = \
        units/systemd-logger.service.in \
        units/syslog.target.in \
        LICENSE \
-       README
+       README \
+       DISTRO_PORTING
 
 if TARGET_FEDORA
 dist_systemunit_DATA += \