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Try to detect color support, make color configurable

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This commit tries to detect if users can render colors in their terminal
and only enables color logs if that is true.

It also adds no-color.org's NO_COLOR env var support to allow it to be
disabled.
This commit is contained in:
Kristoffer Dalby 2021-08-06 07:29:57 +01:00
parent 8a614dabc0
commit 73a00c89ff
3 changed files with 28 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

23
cmd/headscale/headscale.go
View file

@ -4,6 +4,7 @@ import (
"os"
"time"
"github.com/efekarakus/termcolor"
"github.com/juanfont/headscale/cmd/headscale/cli"
"github.com/rs/zerolog"
"github.com/rs/zerolog/log"
@ -11,10 +12,32 @@ import (
)
func main() {
var colors bool
switch l := termcolor.SupportLevel(os.Stderr); l {
case termcolor.Level16M:
colors = true
case termcolor.Level256:
colors = true
case termcolor.LevelBasic:
colors = true
default:
// no color, return text as is.
log.Trace().Msg("Colors are not supported, disabling")
colors = false
}
// Adhere to no-color.org manifesto of allowing users to
// turn off color in cli/services
if _, noColorIsSet := os.LookupEnv("NO_COLOR"); noColorIsSet {
log.Trace().Msg("NO_COLOR is set, disabling colors")
colors = false
}
zerolog.TimeFieldFormat = zerolog.TimeFormatUnix
log.Logger = log.Output(zerolog.ConsoleWriter{
Out: os.Stdout,
TimeFormat: time.RFC3339,
NoColor: !colors,
})
err := cli.LoadConfig("")

1
go.mod
View file

@ -4,6 +4,7 @@ go 1.16
require (
github.com/AlecAivazis/survey/v2 v2.0.5
github.com/efekarakus/termcolor v1.0.1 // indirect
github.com/gin-gonic/gin v1.7.2
github.com/hako/durafmt v0.0.0-20210608085754-5c1018a4e16b
github.com/klauspost/compress v1.13.1

4
go.sum
View file

@ -146,6 +146,8 @@ github.com/eapache/go-resiliency v1.1.0/go.mod h1:kFI+JgMyC7bLPUVY133qvEBtVayf5m
github.com/eapache/go-xerial-snappy v0.0.0-20180814174437-776d5712da21/go.mod h1:+020luEh2TKB4/GOp8oxxtq0Daoen/Cii55CzbTV6DU=
github.com/eapache/queue v1.1.0/go.mod h1:6eCeP0CKFpHLu8blIFXhExK/dRa7WDZfr6jVFPTqq+I=
github.com/edsrzf/mmap-go v1.0.0/go.mod h1:YO35OhQPt3KJa3ryjFM5Bs14WD66h8eGKpfaBNrHW5M=
github.com/efekarakus/termcolor v1.0.1 h1:YAKFO3bnLrqZGTWyNLcYoSIAQFKVOmbqmDnwsU/znzg=
github.com/efekarakus/termcolor v1.0.1/go.mod h1:AitrZNrE4nPO538fRsqf+p0WgLdAsGN5pUNrHEPsEMM=
github.com/emirpasic/gods v1.12.0/go.mod h1:YfzfFFoVP/catgzJb4IKIqXjX78Ha8FMSDh3ymbK86o=
github.com/envoyproxy/go-control-plane v0.6.9/go.mod h1:SBwIajubJHhxtWwsL9s8ss4safvEdbitLhGGK48rN6g=
github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
@ -532,6 +534,7 @@ github.com/mattn/go-isatty v0.0.5/go.mod h1:Iq45c/XA43vh69/j3iqttzPXn0bhXyGjM0Hd
github.com/mattn/go-isatty v0.0.7/go.mod h1:Iq45c/XA43vh69/j3iqttzPXn0bhXyGjM0Hdxcsrc5s=
github.com/mattn/go-isatty v0.0.8/go.mod h1:Iq45c/XA43vh69/j3iqttzPXn0bhXyGjM0Hdxcsrc5s=
github.com/mattn/go-isatty v0.0.9/go.mod h1:YNRxwqDuOph6SZLI9vUUz6OYw3QyUt7WiY2yME+cCiQ=
github.com/mattn/go-isatty v0.0.10/go.mod h1:qgIWMr58cqv1PHHyhnkY9lrL7etaEgOFcMEpPG5Rm84=
github.com/mattn/go-isatty v0.0.11/go.mod h1:PhnuNfih5lzO57/f3n+odYbM4JtupLOxQOAqxQCu2WE=
github.com/mattn/go-isatty v0.0.12 h1:wuysRhFDzyxgEmMf5xjvJ2M9dZoWAXNNr5LSBS7uHXY=
github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU=
@ -1002,6 +1005,7 @@ golang.org/x/sys v0.0.0-20191001151750-bb3f8db39f24/go.mod h1:h1NjWce9XRLGQEsW7w
golang.org/x/sys v0.0.0-20191005200804-aed5e4c7ecf9/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20191008105621-543471e840be/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20191113165036-4c7a9d0fe056/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20191120155948-bd437916bb0e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20191204072324-ce4227a45e2e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20191220142924-d4481acd189f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=