Add mkdir_p to FileUtils.install (#104)

* Add mkdir_p to FileUtils.install

* Adjust raise message.

* adjust raise language

* handle trailing slash in dest

* simplify

* Add tests

Author: satmandu

lib/fileutils.rb

@@ -1642,7 +1642,13 @@ def install(src, dest, mode: nil, owner: nil, group: nil, preserve: nil,
       st = File.stat(s)
       unless File.exist?(d) and compare_file(s, d)
         remove_file d, true
-        copy_file s, d
+        if d.end_with?('/')
+          mkdir_p d
+          copy_file s, d + File.basename(s)
+        else
+          mkdir_p File.expand_path('..', d)
+          copy_file s, d
+        end
         File.utime st.atime, st.mtime, d if preserve
         File.chmod fu_mode(mode, st), d if mode
         File.chown uid, gid, d if uid or gid

test/fileutils/test_fileutils.rb

@@ -1237,6 +1237,14 @@ def test_install_pathname
       install Pathname.new('tmp/a'), 'tmp/b'
       rm_f 'tmp/a'; touch 'tmp/a'
       install Pathname.new('tmp/a'), Pathname.new('tmp/b')
+      my_rm_rf 'tmp/new_dir_end_with_slash'
+      install Pathname.new('tmp/a'), 'tmp/new_dir_end_with_slash/'
+      my_rm_rf 'tmp/new_dir_end_with_slash'
+      my_rm_rf 'tmp/new_dir'
+      install Pathname.new('tmp/a'), 'tmp/new_dir/a'
+      my_rm_rf 'tmp/new_dir'
+      install Pathname.new('tmp/a'), 'tmp/new_dir/new_dir_end_with_slash/'
+      my_rm_rf 'tmp/new_dir'
       rm_f 'tmp/a'
       touch 'tmp/a'
       touch 'tmp/b'