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mappings: fix aliasing bug with '<' wildcards

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In contrast to any 'something<' mapping, a '<' mapping cannot be unique
Thus, '<' mappings are thus just an append to target, which is exactly
what we get when trimming empty prefix ''.

Otherwise, given mapping

{ "<": "storage/backups/app-srv" }

Before (clearly a conflict)
zroot     => storage/backups/app-srv
storage   => storage/backups/app-srv
After:
zroot     => storage/backups/app-srv/zroot
storage   => storage/backups/app-srv/storage

However, mapping directly with subtree wildcard is still possible, just
not with the root wildcard

{
    "<"              "storage/backups/app-srv"
    "zroot/var/db<": "storage/db_replication/app-srv"
}

fixes #22
This commit is contained in:
Christian Schwarz
2017-10-05 19:58:43 +02:00
parent b5d46e2ec3
commit 72d288567e
3 changed files with 8 additions and 14 deletions
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cmd/config_test.go
+2 -2
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@@ -129,8 +129,8 @@ func TestDatasetMapFilter(t *testing.T) {
expectMapping(map1, "a/b/c/d/e", "")
expectMapping(map1, "a/b/e", "root2/e")
expectMapping(map1, "a/b", "root2")
expectMapping(map1, "x", "root3/b/c")
expectMapping(map1, "x/y", "root3/b/c/y")
expectMapping(map1, "x", "root3/b/c/x")
expectMapping(map1, "x/y", "root3/b/c/x/y")
expectMapping(map1, "q", "root4/1/2")
expectMapping(map1, "b", "")
expectMapping(map1, "q/r", "root4/1/2/r")