needs testing

go.mod

@@ -2,14 +2,16 @@ module github.com/jpillora/installer
 
 go 1.18
 
-require github.com/jpillora/opts v1.1.2
+require (
+	github.com/jpillora/opts v1.1.2
+	github.com/jpillora/requestlog v1.0.0
+)
 
 require (
 	github.com/andrew-d/go-termutil v0.0.0-20150726205930-009166a695a2 // indirect
 	github.com/hashicorp/errwrap v1.0.0 // indirect
 	github.com/hashicorp/go-multierror v1.0.0 // indirect
 	github.com/jpillora/ansi v1.0.2 // indirect
-	github.com/jpillora/requestlog v1.0.0 // indirect
 	github.com/jpillora/sizestr v1.0.0 // indirect
 	github.com/posener/complete v1.2.2-0.20190308074557-af07aa5181b3 // indirect
 	github.com/tomasen/realip v0.0.0-20180522021738-f0c99a92ddce // indirect

scripts/install.sh.tmpl

@@ -125,8 +125,18 @@ function install {
 	fi
 	#move into PATH or cwd
 	chmod +x $TMP_BIN || fail "chmod +x failed"
-	{{ if .SudoMove }}echo "using sudo to move binary..."{{ end }}
-	{{ if .SudoMove }}sudo {{ end }}mv $TMP_BIN $OUT_DIR/$PROG || fail "mv failed" #FINAL STEP!
+	#move without sudo
+	OUT=$(mv $TMP_BIN $OUT_DIR/$PROG 2>&1)
+	STATUS=$?
+	# failed and string contains "permission denied"
+	if [ $STATUS -ne 0 ]; then
+		if [[ $OUT =~ "permission denied" ]]; then
+			echo "mv with sudo..."
+			sudo mv $TMP_BIN $OUT_DIR/$PROG || fail "mv failed" 
+		else
+			fail "mv failed"
+		fi
+	fi
 	echo "{{ if .MoveToPath }}Installed at{{ else }}Downloaded to{{ end }} $OUT_DIR/$PROG"
 	#done
 	cleanup