[Buildroot] [PATCH v2 1/1] package/tailscale: install systemd service files

[yann.morin at orange.com]

Yuanhao, All,

On 2025-04-14 08:07 -0700, TIAN Yuanhao spake thusly:
> Signed-off-by: TIAN Yuanhao <tianyuanhao3 at 163.com>
> Cc: James Hilliard <james.hilliard1 at gmail.com>
> Cc: Yann E. MORIN <yann.morin at orange.com>
> 
> ---
> Changes v1 -> v2:
>   - Remove untested TAILSCALE_INSTALL_INIT_OPENRC
>   - Change default service files to use /bin instead of /sbin

That's an option, too. I find it not very nice to sed the file; I think
it would be better to carry a patch that patches the service file, as it
is provided in the source tree and not generated at build.

Yet, I think it's better to do the symlink in sbin... As I said in my
earlier reply today, the location of the executable is an artifact of
the limitations of the Buildroot golang-package infrastructure, so it
is only fitting that we do workaround this with a symlink.

Note: it should be relatively easy in Buildroot to add support for
providing the location of individual binaries installed by a golang
package. Indeed, golang package usually install very few executables,
usually just one; when they install multiple, it's just a handful of
them, and they mostly always go into /usr/bin/. For the very few that
need to go in /usr/sbin, then this can be overridden in the package .mk;
maybe something like:

    TAILSCALE_BINDIR_tailscaled = /usr/sbin

and then in the golang-package infra:

    164 define $(2)_INSTALL_TARGET_CMDS
    165 »       $$(foreach d,$$($(2)_INSTALL_BINS),\
    166 »       »       $$(INSTALL) -D -m 0755 $$(@D)/bin/$$(d) $$(TARGET_DIR)$(or $$($(2)_BINDIR_$$(d)),/usr/bin)/$$(d)
    167 »       )
    168 endef

(I don't think a similar feature would be needed for host packages,
because we don't care about bin vs. sbin for those.)

Regards,
Yann E. MORIN.

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