Don't allow backup root to be a symbolic link

2 files changed, 25 insertions, 0 deletions

diff --git a/yarns/0030-basics.yarn b/yarns/0030-basics.yarn
index 4bc8439b..c753a10c 100644
--- a/yarns/0030-basics.yarn
+++ b/yarns/0030-basics.yarn
@@ -157,6 +157,26 @@ instead of a file.
     THEN the attempt succeeded
 
 
+Backup root is not a directory
+------------------------------
+
+Obnam does not, currently, support backing up individual files. The
+backup root must be a directory. This scenario verifies that Obnam
+gives the right error if the root is not a directory. The error code
+is R79ED6X, for "Backup root does not exist or is not a directory".
+
+    SCENARIO backup root is not a directory
+
+    GIVEN a symlink L pointing at /dev/null
+    WHEN user U attempts to back up directory L to repository R
+    THEN the attempt failed with exit code 1
+    THEN the error message matches "R79ED6X"
+
+    GIVEN a file F in ., with data
+    WHEN user U attempts to back up directory F to repository R
+    THEN the attempt failed with exit code 1
+    THEN the error message matches "R79ED6X"
+
 Backup to roots at once
 -----------------------
 
diff --git a/yarns/9000-implements.yarn b/yarns/9000-implements.yarn
index 4fb0fc00..b348a34f 100644
--- a/yarns/9000-implements.yarn
+++ b/yarns/9000-implements.yarn
@@ -104,6 +104,11 @@ We need to manipulate extended attributes.
     mkdir -p $(dirname "$DATADIR/$MATCH_1")
     setfattr --name="$MATCH_2" --value "$MATCH_3" "$DATADIR/$MATCH_1"
 
+Create a symlink.
+
+    IMPLEMENTS GIVEN a symlink (\S+) pointing at (\S+)
+    ln -s "$MATCH_2" "$DATADIR/$MATCH_1"
+
 Sometimes we need to remove a file.
 
     IMPLEMENTS WHEN user (\S+) removes file (\S+)