check for xdg-open

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Former-commit-id: 4f37e12ff7ba15cea5dcc6fc83e5e79a27ccbcb8
Former-commit-id: 07c4ee19000bbb5f1294b66781b327ddfaa94d27 [formerly 8087f44df69fee4ba7c9c0610501556bf852ddfe]
Former-commit-id: 2d68d8de8d634126292962509b9f0e91142a496d

cointop/help.go

@@ -1,13 +1,12 @@
 package cointop
 
 import (
-	"os/exec"
-
 	"github.com/jroimartin/gocui"
+	"github.com/miguelmota/cointop/pkg/open"
 )
 
 func (ct *Cointop) openHelp(g *gocui.Gui, v *gocui.View) error {
-	exec.Command("open", ct.helpLink()).Output()
+	open.URL(ct.helpLink())
 	return nil
 }
 

cointop/keybindings.go

@@ -2,9 +2,9 @@ package cointop
 
 import (
 	"log"
-	"os/exec"
 
 	"github.com/jroimartin/gocui"
+	"github.com/miguelmota/cointop/pkg/open"
 )
 
 func (ct *Cointop) setKeybinding(key interface{}, callback func(g *gocui.Gui, v *gocui.View) error) {
@@ -90,7 +90,7 @@ func (ct *Cointop) refresh(g *gocui.Gui, v *gocui.View) error {
 }
 
 func (ct *Cointop) openLink(g *gocui.Gui, v *gocui.View) error {
-	exec.Command("open", ct.rowLink()).Output()
+	open.URL(ct.rowLink())
 	return nil
 }
 

pkg/open/open.go

@@ -0,0 +1,34 @@
+package open
+
+import (
+	"os/exec"
+)
+
+var openCmd string
+var possibleCmds = []string{
+	"xdg-open", // linux
+	"open",     // mac
+	"start",    // windows?
+}
+
+func init() {
+	for i, cmd := range possibleCmds {
+		out, err := exec.Command("command", "-v", cmd).Output()
+		if err != nil {
+			continue
+		}
+
+		bin := string(out)
+		if bin != "" {
+			openCmd = possibleCmds[i]
+		}
+	}
+}
+
+// URL open url
+func URL(s string) error {
+	if openCmd != "" {
+		exec.Command(openCmd, s).Output()
+	}
+	return nil
+}