Fix user expansion in link source

Previous to this patch, having a config like the following would not
work properly:

    - link:
        ~/a: ~/b

This was because the '~' was expanded on the left hand side (the link
target), but not the right hand side (the link source). It was necessary
to use a workaround like this:

    - link:
        ~/a: $HOME/b

This was because variable expansion was being done, but user expansion
was not being done.

This commit adds support for using '~' in the link source.

1 files changed, 17 insertions, 0 deletions

diff --git a/test/tests/link-environment-user-expansion-target.bash b/test/tests/link-environment-user-expansion-target.bash
new file mode 100644
index 0000000..9cb3424
--- /dev/null
+++ b/test/tests/link-environment-user-expansion-target.bash
@@ -0,0 +1,17 @@
+test_description='link expands user in target'
+. '../test-lib.bash'
+
+test_expect_success 'setup' '
+echo "apple" > ~/f
+'
+
+test_expect_success 'run' '
+run_dotbot <<EOF
+- link:
+    ~/g: ~/f
+EOF
+'
+
+test_expect_success 'test' '
+grep "apple" ~/g
+'