Let's also use vcs_tag() when we're doing a non-git build. In those scenarios,
the build would normally be done just once in a given copy, so doing an extra
call does not matter. We can save a few lines of meson config.
The special path was added in 064b8e2c99, with
the justifaction that vcs_tag() is slow and -Dversion-tag=foo can be used to
fix the version tag and speed up partial rebuilds. I think the justification
for this is weak: having an accurate version tag is particularly useful when
developing the code. Shaving of a fraction of a second at the cost of having to
manually update the version seems iffy.
Secondly, with vcs_tag() we can be pretty sure that meson will build the
version file first and that it'll be available to all build steps. Because we
didn't use version tag, we had to manually specify the dependency on version.h
in various places. It seems nicer to use vcs_tag() and not have to deal with
this problem at all.
Finally, the savings in time seem much smaller than back when
064b8e2c99 was made. It reported a change
from 94 ms to 521 ms. But now the difference seems to be about 50 ms:
Before this patch:
$ time ninja -C build
ninja: Entering directory `build'
ninja: no work to do.
ninja -C build 0.04s user 0.02s system 97% cpu 0.057 total
ninja -C build 0.03s user 0.01s system 97% cpu 0.049 total
ninja -C build 0.03s user 0.02s system 96% cpu 0.051 total
ninja -C build 0.03s user 0.01s system 96% cpu 0.049 total
ninja -C build 0.03s user 0.01s system 97% cpu 0.046 total
With the two patches in this PR:
systemd-stable [drop-versiondep] time ninja -C build
ninja: Entering directory `build'
[1/669] Generating version.h with a custom command
ninja -C build 0.08s user 0.03s system 98% cpu 0.106 total
ninja -C build 0.08s user 0.03s system 98% cpu 0.104 total
ninja -C build 0.09s user 0.02s system 98% cpu 0.116 total
ninja -C build 0.08s user 0.02s system 97% cpu 0.108 total
Overall, I think the tiny time savings are not worth the complexity.
The use of vcs_tag was dropped in #28567, which results in builds having
stale version information once new commit are made.
This also fixes a case where CI builds would have no version information
because they are checked out without any tags for git-describe to use.
Additionally, use `--git-dir` now, as that particular issues seems to
have been fixed by now.
Let's a "b" helper for json_variant_set_field() that combines
json_build() with json_variant_set_field(), similar to the
json_variant_merge_objectb(), json_variant_append_arrayb().
json_append() is a useful wrapper around json_variant_merge(). However,
I think the naming sould be cleaned up a bit of both functions.
I thinker "merge" is the better word than "append", since it does
decidedly more than just append: it replaces existing fields of the same
name, hence "merge" sounds more appropriate. This is as opposed to the
similar operations for arrays, where no such override logic is applied
and we really just append, hence those functions are called "append"
already.
To make clearer that "merge" is about objects, and "append" about
arrays, also include "object" in the name.
Also, include "json_variant" in the name, like we do for almost all
other functions in the JSON API that take a JSON object as primary
input, and hence are kinda object methods.
Finally, let's follow the logic that helpers that combine json_build()
with some other operation get suffixed with "b" like we already have in
some cases.
Hence:
json_variant_merge() → json_variant_merge_object()
json_append() → json_variant_merge_objectb()
This mirrors nicely the existing:
json_variant_append_array()
json_vairant_append_arrayb()
This also drops the variant of json_append() that takes a va_arg
parameter (i.e. json_appendv()). We have no user of that so far, and
given the nature as a helper function only I don#t see that happening,
and if it happens after all it's trivial to bring back.
Let's make utf8_to_utf16() and utf16_to_utf8() a bit nicer to use by
adding shortcuts for common cases.
This is particularly relevant for utf16_to_utf8() since the
multiplication with 2 is easy to forget.
This reverts commits 89e73ce86f and
543d2a4d45.
The commit assign "custom" to fixed DUID type 5. When making DUID fully
configurable, the type number should be also configurable. Also, the
fully custom DUID should be acceptable for DHCPv4.
We went back-and-forth a bit on this. Very old meson would print a message
about detecting the program if a quoted argument was used, leading to a lot of
noise. So we started to convert various places to use the variable, but then it
turned out that meson < 0.56.2 doesn't handle this correctly and we reverted to
using strings everywhere in 7c22f07cbd. Then at
some point we stopped supporting old meson and over time we started using the
variable in various places again, somewhat inconsistently. Then most calls to
'sh' were removed in 9289e093ae when
install_emptydir() builtin started being used.
Now meson allows either the string or variable to be used, and doesn't print a
message if the string is used. Let's use the variable everywhere. For 'sh', we
could do either, but for other variables, we _do_ want the detection to happen,
for example for git, find, awk, which might not be installed and we want to
detect that early, before we start the build. It would be ugly to use quotes
for some programs, but not for others. Also, a string is still refused for
test(), so we couldn't use the string version even if we didn't care about
detection.
Now that we use meson feature options for our dependencies, we can just
rely on '--auto-features=disabled' to do the same. One benefit of this
is that specific features can still be force-enabled by overriding it
with the appropriate '-Dfeature=enabled' flag.
The two remaining uses for skip-deps can simply rely on their default
logic that sets the value to 'no' when the dependency is disabled.
Also, there is no need to conditionalize the get_variable() calls
because not-found dependencies will just return the passed default value
if provided.
This uses a two-step approach to make sure we can fall back to
find_library(), while also skipping the detection if the features are
explicitly disabled.
By making this a disabler dependency, we can slightly simplify the code
and it als fixes the build for -Dfdisk=disabled as we failed to create a
fallback empty libshared_fdisk variable.
By using meson features we can replace the handcrafted dependency
auto-detection by just passing the value from get_option directly to the
required arg for dependency, find_library etc.
'auto' features make the dependency optional, 'enabled' requires it
while 'disabled' features will skip detection entirely.
Any skipped or not found dependency will just be a no-op when passed to
build steps and therefore we can also skip the creation of empty vars.
The use of skip_deps for these is dropped here as meson provides a way
to disable all optional features in one go by passing
'-Dauto_features=disabled'.
Include T1 and T2 DHCPv6 options to expose in dbus API.
Introduced new field DHCPv6lease where these options are
added. This will be added to the JSON output when we query
org.freedesktop.network1.Manager object.
A Lifetime of 0 indicates that the router is not a default router anymore
and associated default route should be discarded from host's routing table.
https://datatracker.ietf.org/doc/html/rfc4861
```
Router Lifetime
16-bit unsigned integer. The lifetime associated
with the default router in units of seconds. The
field can contain values up to 65535 and receivers
should handle any value, while the sending rules in
Section 6 limit the lifetime to 9000 seconds. A
Lifetime of 0 indicates that the router is not a
default router and SHOULD NOT appear on the default
router list. The Router Lifetime applies only to
the router's usefulness as a default router; it
does not apply to information contained in other
message fields or options. Options that need time
limits for their information include their own
lifetime fields.
```
Previously, mount_private_sysfs() was implemented by using open_tree()
and move_mount() to keep submounts. But these syscalls are slightly new
and supported since kernel version 5.2.
We already do the same thing for /proc/, but without the new syscalls.
Let's use the same logic to mount private procfs. Then, we can mount
new instance of sysfs with older kernels.
Zbigniew Jędrzejewski-Szmek
Jan Janssen
Mike Yuan
Susant Sahani
Yu Watanabe
Lennart Poettering
Daan De Meyer
Frantisek Sumsal
Nandakumar Raghavan