From 99546577c6094ddc9e407065ccaab06810537917 Mon Sep 17 00:00:00 2001
From: Martin Polden <mpolden@mpolden.no>
Date: Fri, 30 Jul 2021 12:42:51 +0200
Subject: config: Expand user in PostCommand path

---
 queue/config.go      | 32 +++++++++++++++++++++++---------
 queue/config_test.go | 25 +++++++++++++++++++++++++
 2 files changed, 48 insertions(+), 9 deletions(-)

diff --git a/queue/config.go b/queue/config.go
index f8b4469..f774438 100644
--- a/queue/config.go
+++ b/queue/config.go
@@ -99,15 +99,32 @@ func parseTemplate(tmpl string) (*template.Template, error) {
 	return t, nil
 }
 
+func expandUser(path string) string {
+	tilde := strings.Index(path, "~")
+	end := strings.IndexRune(path, os.PathSeparator)
+	if tilde != 0 {
+		return path
+	}
+	if end == -1 {
+		end = len(path)
+	}
+	home := os.Getenv("HOME")
+	if end > 1 {
+		home = filepath.Join(filepath.Dir(home), path[1:end])
+	}
+	return filepath.Join(home, path[end:])
+}
+
 func command(cmd string) (*exec.Cmd, error) {
 	if cmd == "" {
 		return nil, nil
 	}
 	argv := strings.Split(cmd, " ")
-	if _, err := exec.LookPath(argv[0]); err != nil {
+	program := expandUser(argv[0])
+	if _, err := exec.LookPath(program); err != nil {
 		return nil, err
 	}
-	return exec.Command(argv[0], argv[1:]...), nil
+	return exec.Command(program, argv[1:]...), nil
 }
 
 func (c *Config) load() error {
@@ -225,16 +242,13 @@ func readConfig(r io.Reader) (Config, error) {
 	return cfg, nil
 }
 
-func ReadConfig(name string) (Config, error) {
-	if name == "~/.lftpqrc" {
-		home := os.Getenv("HOME")
-		name = filepath.Join(home, ".lftpqrc")
-	}
+func ReadConfig(path string) (Config, error) {
+	path = expandUser(path)
 	var r io.Reader
-	if name == "-" {
+	if path == "-" {
 		r = bufio.NewReader(os.Stdin)
 	} else {
-		f, err := os.Open(name)
+		f, err := os.Open(path)
 		if err != nil {
 			return Config{}, err
 		}
diff --git a/queue/config_test.go b/queue/config_test.go
index 1592bb1..7cf57a2 100644
--- a/queue/config_test.go
+++ b/queue/config_test.go
@@ -1,6 +1,7 @@
 package queue
 
 import (
+	"os"
 	"reflect"
 	"strings"
 	"testing"
@@ -173,3 +174,27 @@ func TestSetLocalDir(t *testing.T) {
 		}
 	}
 }
+
+func TestExpandUser(t *testing.T) {
+	home := "/home/foo"
+	os.Setenv("HOME", home)
+	var tests = []struct {
+		in  string
+		out string
+	}{
+		{"", ""},
+		{"/d", "/d"},
+		{"~", home},
+		{"~/", home},
+		{"~bar", "/home/bar"},
+		{"~bar/baz", "/home/bar/baz"},
+		{"~/bar", home + "/bar"},
+		{"/foo/~/bar", "/foo/~/bar"},
+	}
+	for i, tt := range tests {
+		out := expandUser(tt.in)
+		if out != tt.out {
+			t.Errorf("#%d: expandUser(%q) = %q, want %q", i, tt.in, out, tt.out)
+		}
+	}
+}
-- 
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