Document supported Go versions

Establish a policy of supporting the two most recent Go versions.

.changelog/214.txt

@@ -0,0 +1,7 @@
+```release-note:enhancement
+build: Require Go 1.21 for the module.
+```
+
+```release-note:enhancement
+docs: Add policy of supporting the two most recent Go releases.
+```

.github/workflows/go.yml

@@ -34,7 +34,7 @@ jobs:
       matrix:
         go:
           - 1.22.x
-          - 1.18.x
+          - 1.21.9
         os:
           - macos-11
           - macos-12
@@ -53,10 +53,10 @@ jobs:
           - {cgo: cgo, os: ubuntu-20.04}
           - {cgo: cgo, os: ubuntu-22.04}
           # Limit the OS variants tested with the earliest supported Go version (save resources).
-          - {go: 1.18.10, os: macos-11}
-          - {go: 1.18.10, os: macos-12}
-          - {go: 1.18.10, os: windows-2019}
-          - {go: 1.18.10, os: ubuntu-22.04}
+          - {go: 1.21.9, os: macos-11}
+          - {go: 1.21.9, os: macos-12}
+          - {go: 1.21.9, os: windows-2019}
+          - {go: 1.21.9, os: ubuntu-22.04}
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4
@@ -99,8 +99,8 @@ jobs:
     runs-on: ubuntu-latest
     env:
       # Only GITHUB_* are passed into the VM.
-      GITHUB_GOLANG_VERSION: 1.22.1
-    name: test (1.22.1, freebsd-14.0, cgo)
+      GITHUB_GOLANG_VERSION: 1.22.2
+    name: test (1.22.2, freebsd-14.0, cgo)
     steps:
       - uses: actions/checkout@v4
 

README.md

@@ -79,3 +79,9 @@ This table lists the OS and architectures for which a "provider" is implemented.
 | windows/arm    |              |        |
 
 * On darwin (macOS) host information like machineid and process information like memory, cpu, user and starttime require cgo.
+
+### Supported Go versions
+
+go-sysinfo supports the [two most recent Go releases][ci_go_versions].
+
+[ci_go_versions]: https://github.com/elastic/go-sysinfo/blob/main/.github/workflows/go.yml#L35-L37

go.mod

@@ -1,6 +1,6 @@
 module github.com/elastic/go-sysinfo
 
-go 1.18
+go 1.21
 
 require (
 	github.com/docker/docker v24.0.9+incompatible

go.sum

@@ -1,4 +1,5 @@
 github.com/Azure/go-ansiterm v0.0.0-20210617225240-d185dfc1b5a1 h1:UQHMgLO+TxOElx5B5HZ4hJQsoJ/PvUvKRhJHDQXO8P8=
+github.com/Azure/go-ansiterm v0.0.0-20210617225240-d185dfc1b5a1/go.mod h1:xomTg63KZ2rFqZQzSB4Vz2SUXa1BpHTVz9L5PTmPC4E=
 github.com/Microsoft/go-winio v0.6.0 h1:slsWYD/zyx7lCXoZVlvQrj0hPTM1HI4+v1sIda2yDvg=
 github.com/Microsoft/go-winio v0.6.0/go.mod h1:cTAf44im0RAYeL23bpB+fzCyDH2MJiz2BO69KH/soAE=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -18,6 +19,7 @@ github.com/gogo/protobuf v1.3.2 h1:Ov1cvc58UF3b5XjBnZv7+opcTcQFZebYjWzi34vdm4Q=
 github.com/gogo/protobuf v1.3.2/go.mod h1:P1XiOD3dCwIKUDQYPy72D8LYyHL2YPYrpS2s69NZV8Q=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.8 h1:e6P7q2lk1O+qJJb4BtCQXlK8vWEO8V1ZeuEdJNOqZyg=
+github.com/google/go-cmp v0.5.8/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/jessevdk/go-flags v1.4.0/go.mod h1:4FA24M0QyGHXBuZZK/XkWh8h0e1EYbRYJSGM75WSRxI=
 github.com/joeshaw/multierror v0.0.0-20140124173710-69b34d4ec901 h1:rp+c0RAYOWj8l6qbCUTSiRLG/iKnW3K3/QfPPuSsBt4=
 github.com/joeshaw/multierror v0.0.0-20140124173710-69b34d4ec901/go.mod h1:Z86h9688Y0wesXCyonoVr47MasHilkuLMqGhRZ4Hpak=
@@ -44,6 +46,7 @@ github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZN
 github.com/prometheus/procfs v0.8.0 h1:ODq8ZFEaYeCaZOJlZZdJA2AbQR98dSHSM1KW/You5mo=
 github.com/prometheus/procfs v0.8.0/go.mod h1:z7EfXMXOkbkqb9IINtpCn86r/to3BnA0uaxHdg830/4=
 github.com/sirupsen/logrus v1.7.0 h1:ShrD1U9pZB12TX0cVy0DtePoCH97K8EtX+mg7ZARUtM=
+github.com/sirupsen/logrus v1.7.0/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=