Use ls-remote --get-url to get remote url

As noted in a comment, 'git ls-remote --get-url' will expand insteadOf
mappings.  I use a number of shortcuts (like gh: for git on github,
lp: for git on launchpad, me: for my github repositories, etc), so I
was constantly hitting situations in which git-open would fail to do
the right thing.

It looks like '--get-url' has been available since git 2.12.0.

git-open

@@ -49,8 +49,7 @@ remote=${1:-$default_remote}
 remote=${remote:-$tracked_remote}
 remote=${remote:-"origin"}
 
-# @TODO ls-remote will also expand "insteadOf" items `giturl=$(git ls-remote --get-url $remote)``
-giturl=$(git config --get "remote.${remote}.url")
+giturl=$(git ls-remote --get-url "$remote")
 
 if [[ -z "$giturl" ]]; then
  echo "Git remote is not set for $remote" 1>&2

test/git-open.bats

@@ -35,6 +35,18 @@ setup() {
  assert_output --partial "usage: git open"
 }
 
+##
+## url handling
+##
+
+@test "url: insteadOf handling" {
+ git config --global url.http:https://example.com/.insteadOf ex:
+ git remote set-url origin ex:example.git
+ git checkout -B master
+ run ../git-open
+ assert_output "http:https://example.com/example"
+}
+
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 ## GitHub
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