libct/cgroupv1/getCgroupMountsHelper: minor nit

kolyshkin · kolyshkin · commit 36d6ff2072ca · 2020-05-20T13:37:39.000-07:00
It is easy to just use TrimPrefix which does nothing in case the prefix
does not exist.

Signed-off-by: Kir Kolyshkin &lt;kolyshkin@gmail.com&gt;
diff --git a/libcontainer/cgroups/cgroupv1/utils.go b/libcontainer/cgroups/cgroupv1/utils.go
@@ -147,9 +147,7 @@ func getCgroupMountsHelper(ss map[string]bool, mi io.Reader, all bool) ([]Mount,
 				continue
 			}
 			ss[opt] = true
-			if strings.HasPrefix(opt, CgroupNamePrefix) {
-				opt = opt[len(CgroupNamePrefix):]
-			}
+			opt = strings.TrimPrefix(opt, CgroupNamePrefix)
 			m.Subsystems = append(m.Subsystems, opt)
 			numFound++
 		}

Original file line number	Diff line number	Diff line change
`@@ -147,9 +147,7 @@ func getCgroupMountsHelper(ss map[string]bool, mi io.Reader, all bool) ([]Mount,`
`147`	`147`	`continue`
`148`	`148`	`}`
`149`	`149`	`ss[opt] = true`
`150`		`- if strings.HasPrefix(opt, CgroupNamePrefix) {`
`151`		`- opt = opt[len(CgroupNamePrefix):]`
`152`		`- }`
	`150`	`+ opt = strings.TrimPrefix(opt, CgroupNamePrefix)`
`153`	`151`	`m.Subsystems = append(m.Subsystems, opt)`
`154`	`152`	`numFound++`
`155`	`153`	`}`