In python\ruby world you might need different run times to run a program. With go that's usually isn't the case. A package built with go-1.24 will even run after you remove dev-lang/go.
But ... sometimes some external software will require a golang version which isn't currently available on my gentoo. Since I work a lot for customers with outdate go versions, the solution was always to use goenv\mise\asdf.
I tried all, and each has it's own quirks. If you are ready to try another solution with it's own quirks, keep on reading.
The solution - as the title says - is using go-lang slots. There has been an open issue for quite some time now (https://bugs.gentoo.org/941769), but it's been dormant, so I decided to give it a shot.
Using eselect and gentoo is very convenient for me (as I also do a lot of work with python and always really on gentoo to provide all the python versions I need).
If you want to have multiple versions of go in gentoo, here is what you can dot:
Code: Select all
$ cat /etc/portage/repos.conf/golang-overlay.conf
[golang-overlay]
location = /var/db/repos/golang-overlay
masters = gentoo
sync-type = git
sync-uri = https://gitlab.com/oz123/golang-overlay.git
auto-sync = yes
Now, run emerge sync ...
Code: Select all
sudo emerge --sync golang-overlay
>>> Syncing repository 'golang-overlay' into '/var/db/repos/golang-overlay'...
/usr/sbin/git clone --depth 1 https://gitlab.com/oz123/golang-overlay.git .
Cloning into '.'...
remote: Enumerating objects: 31, done.
remote: Counting objects: 100% (31/31), done.
remote: Compressing objects: 100% (25/25), done.
remote: Total 31 (delta 2), reused 0 (delta 0), pack-reused 0 (from 0)
Receiving objects: 100% (31/31), 17.41 KiB | 8.71 MiB/s, done.
Resolving deltas: 100% (2/2), done.
=== Sync completed for golang-overlay
Action: sync for repo: golang-overlay, returned code = 0
Code: Select all
sudo emerge -C dev-lang/go
Code: Select all
$ sudo emerge -a go:1.25
These are the packages that would be merged, in order:
Calculating dependencies... done!
Dependency resolution took 2.25 s (backtrack: 0/20).
[ebuild N ] dev-lang/go-1.25.8 CPU_FLAGS_X86="sse2"
Would you like to merge these packages? [Yes/No]
Now you should see:
Code: Select all
$ sudo eselect go list
Available Go versions:
[1] 1.25 *
Code: Select all
└ $ sudo emerge -akg go:1.24
...
These are the packages that would be merged, in order:
Calculating dependencies... done!
Dependency resolution took 3.72 s (backtrack: 0/20).
[binary NS ~] dev-lang/go-1.24.12-r1-1 [1.25.8]
Would you like to merge these packages? [Yes/No]
>>> Emerging binary (1 of 1) dev-lang/go-1.24.12-r1::golang-overlay
* go-1.24.12-r1-2.gpkg.tar MD5 SHA1 size ;-) ... [ ok ]
>>> Extracting info
>>> Extracting dev-lang/go-1.24.12-r1
>>> Installing (1 of 1) dev-lang/go-1.24.12-r1::golang-overlay
Go 1.25 is already active. Nothing to do.
>>> Recording dev-lang/go in "world" favorites file...
>>> Completed (1 of 1) dev-lang/go-1.24.12-r1::golang-overlay
* GNU info directory index is up-to-date. | 17:04:37
└ $ sudo eselect go list
Available Go versions:
[1] 1.24
[2] 1.25 *
Code: Select all
$ sudo eselect go list
Available Go versions:
[1] 1.24
[2] 1.25 *
Code: Select all
$ sudo eselect go set 1
Successfully switched to Go 1.24
$ sudo emerge caddy
Calculating dependencies... done!
Dependency resolution took 2.31 s (backtrack: 0/20).
>>> Verifying ebuild manifests
>>> Emerging (1 of 1) www-servers/caddy-2.10.2-r1::gentoo
* caddy-2.10.2.tar.gz BLAKE2B SHA512 size ;-) ... [ ok ]
* caddy-2.10.2-r1-deps.tar.xz BLAKE2B SHA512 size ;-) ... [ ok ]
* caddy-2.10.2-r1-go-mod-sum.patch BLAKE2B SHA512 size ;-) ... [ ok ]
* caddy-2.10.2-docs.tar.gz BLAKE2B SHA512 size ;-) ... [ ok ]
>>> Unpacking source...
>>> Unpacking 'caddy-2.10.2.tar.gz' to /var/tmp/portage/www-servers/caddy-2.10.2-r1/work
>>> Unpacking 'caddy-2.10.2-r1-deps.tar.xz' to /var/tmp/portage/www-servers/caddy-2.10.2-r1/work
=== Skipping unpack of 'caddy-2.10.2-r1-go-mod-sum.patch'
>>> Unpacking 'caddy-2.10.2-docs.tar.gz' to /var/tmp/portage/www-servers/caddy-2.10.2-r1/work
>>> Source unpacked in /var/tmp/portage/www-servers/caddy-2.10.2-r1/work
>>> Preparing source in /var/tmp/portage/www-servers/caddy-2.10.2-r1/work/caddy-2.10.2 ...
* Applying caddy-2.10.2-r1-go-mod-sum.patch ... [ ok ]
>>> Source prepared.
>>> Configuring source in /var/tmp/portage/www-servers/caddy-2.10.2-r1/work/caddy-2.10.2 ...
>>> Source configured.
>>> Compiling source in /var/tmp/portage/www-servers/caddy-2.10.2-r1/work/caddy-2.10.2 ...
go build -ldflags -X github.com/caddyserver/caddy/v2.CustomVersion=2.10.2 ./cmd/caddy
WORK=/var/tmp/portage/www-servers/caddy-2.10.2-r1/temp/go-build2297694948
go: go.mod requires go >= 1.25.1 (running go 1.24.12; GOTOOLCHAIN=local)
* ERROR: www-servers/caddy-2.10.2-r1::gentoo failed (compile phase):
* go build -ldflags -X github.com/caddyserver/caddy/v2.CustomVersion=2.10.2 ./cmd/caddy failed
*
* Call stack:
* ebuild.sh, line 143: Called src_compile
* environment, line 1472: Called ego 'build' '-ldflags' '-X github.com/caddyserver/caddy/v2.CustomVersion=2.10.2' './cmd/caddy'
* environment, line 755: Called die
* The specific snippet of code:
* "$@" || die -n "${*} failed"
*
* If you need support, post the output of `emerge --info '=www-servers/caddy-2.10.2-r1::gentoo'`,
* the complete build log and the output of `emerge -pqv '=www-servers/caddy-2.10.2-r1::gentoo'`.
* The complete build log is located at '/var/log/portage/www-servers:caddy-2.10.2-r1:20260330-150610.log'.
* For convenience, a symlink to the build log is located at '/var/tmp/portage/www-servers/caddy-2.10.2-r1/temp/build.log'.
* The ebuild environment file is located at '/var/tmp/portage/www-servers/caddy-2.10.2-r1/temp/environment'.
* Working directory: '/var/tmp/portage/www-servers/caddy-2.10.2-r1/work/caddy-2.10.2'
* S: '/var/tmp/portage/www-servers/caddy-2.10.2-r1/work/caddy-2.10.2'
>>> Failed to emerge www-servers/caddy-2.10.2-r1, Log file:
>>> '/var/log/portage/www-servers:caddy-2.10.2-r1:20260330-150610.log'
Code: Select all
$ sudo eselect go set 2
Successfully switched to Go 1.25
$ sudo emerge -q caddy
>>> Verifying ebuild manifests
>>> Emerging (1 of 1) www-servers/caddy-2.10.2-r1::gentoo
>>> Installing (1 of 1) www-servers/caddy-2.10.2-r1::gentoo
>>> Recording www-servers/caddy in "world" favorites file...
>>> Completed (1 of 1) www-servers/caddy-2.10.2-r1::gentoo
The overlay has golang versions 1.21 to 1.26.
I will continue adding versions as needed (or requested).
Hopefully, a kind maintainer can continue this job in gentoo upstream.
I'll be happy to help too.
Feedback, issues and suggestions are welcome.