From: Brian Warner <warner@allmydata.com>
Date: Wed, 25 Feb 2009 05:21:36 +0000 (-0700)
Subject: scripts/common: fix alias handling on windows again, emit slightly nicer error messag... 
X-Git-Url: https://git.rkrishnan.org/components/%22news.html/...?a=commitdiff_plain;h=7f8708cb7c10e104b490a3d068bcb35ee54c5a50;p=tahoe-lafs%2Ftahoe-lafs.git

scripts/common: fix alias handling on windows again, emit slightly nicer error message in response to an unknown alias
---

diff --git a/src/allmydata/scripts/common.py b/src/allmydata/scripts/common.py
index c06f7a10..de30bc60 100644
--- a/src/allmydata/scripts/common.py
+++ b/src/allmydata/scripts/common.py
@@ -124,6 +124,9 @@ def platform_uses_lettercolon_drivename():
         return True
     return False
 
+class UnknownAliasError(Exception):
+    pass
+
 def get_alias(aliases, path, default):
     # transform "work:path/filename" into (aliases["work"], "path/filename").
     # If default=None, then an empty alias is indicated by returning
@@ -143,7 +146,7 @@ def get_alias(aliases, path, default):
         if default == None:
             return DefaultAliasMarker, path
         return aliases[default], path
-    if colon == 1 and platform_uses_lettercolon_drivename():
+    if colon == 1 and default == None and platform_uses_lettercolon_drivename():
         # treat C:\why\must\windows\be\so\weird as a local path, not a tahoe
         # file in the "C:" alias
         return DefaultAliasMarker, path
@@ -154,6 +157,8 @@ def get_alias(aliases, path, default):
         if default == None:
             return DefaultAliasMarker, path
         return aliases[default], path
+    if alias not in aliases:
+        raise UnknownAliasError("Unknown alias '%s', please create it with 'tahoe add-alias' or 'tahoe create-alias'." % alias)
     return aliases[alias], path[colon+1:]
 
 def escape_path(path):
diff --git a/src/allmydata/test/test_cli.py b/src/allmydata/test/test_cli.py
index 7d14505f..5330a7b7 100644
--- a/src/allmydata/test/test_cli.py
+++ b/src/allmydata/test/test_cli.py
@@ -281,6 +281,7 @@ class CLI(unittest.TestCase):
                    "c": "CA"}
         def ga1(path):
             return get_alias(aliases, path, "tahoe")
+        uses_lettercolon = common.platform_uses_lettercolon_drivename()
         self.failUnlessEqual(ga1("bare"), ("TA", "bare"))
         self.failUnlessEqual(ga1("baredir/file"), ("TA", "baredir/file"))
         self.failUnlessEqual(ga1("baredir/file:7"), ("TA", "baredir/file:7"))
@@ -290,6 +291,8 @@ class CLI(unittest.TestCase):
         self.failUnlessEqual(ga1("work:"), ("WA", ""))
         self.failUnlessEqual(ga1("work:file"), ("WA", "file"))
         self.failUnlessEqual(ga1("work:dir/file"), ("WA", "dir/file"))
+        # default != None means we really expect a tahoe path, regardless of
+        # whether we're on windows or not. This is what 'tahoe get' uses.
         self.failUnlessEqual(ga1("c:"), ("CA", ""))
         self.failUnlessEqual(ga1("c:file"), ("CA", "file"))
         self.failUnlessEqual(ga1("c:dir/file"), ("CA", "dir/file"))
@@ -297,6 +300,10 @@ class CLI(unittest.TestCase):
         self.failUnlessEqual(ga1("URI:stuff:./file"), ("URI:stuff", "file"))
         self.failUnlessEqual(ga1("URI:stuff:./dir/file"),
                              ("URI:stuff", "dir/file"))
+        self.failUnlessRaises(common.UnknownAliasError, ga1, "missing:")
+        self.failUnlessRaises(common.UnknownAliasError, ga1, "missing:dir")
+        self.failUnlessRaises(common.UnknownAliasError, ga1, "missing:dir/file")
+
         def ga2(path):
             return get_alias(aliases, path, None)
         self.failUnlessEqual(ga2("bare"), (DefaultAliasMarker, "bare"))
@@ -309,15 +316,26 @@ class CLI(unittest.TestCase):
         self.failUnlessEqual(ga2("tahoe:"), ("TA", ""))
         self.failUnlessEqual(ga2("tahoe:file"), ("TA", "file"))
         self.failUnlessEqual(ga2("tahoe:dir/file"), ("TA", "dir/file"))
-        self.failUnlessEqual(ga1("c:"), ("CA", ""))
-        self.failUnlessEqual(ga1("c:file"), ("CA", "file"))
-        self.failUnlessEqual(ga1("c:dir/file"), ("CA", "dir/file"))
+        # on windows, we really want c:foo to indicate a local file.
+        # default==None is what 'tahoe cp' uses.
+        if uses_lettercolon:
+            self.failUnlessEqual(ga2("c:"), (DefaultAliasMarker, "c:"))
+            self.failUnlessEqual(ga2("c:file"), (DefaultAliasMarker, "c:file"))
+            self.failUnlessEqual(ga2("c:dir/file"),
+                                 (DefaultAliasMarker, "c:dir/file"))
+        else:
+            self.failUnlessEqual(ga2("c:"), ("CA", ""))
+            self.failUnlessEqual(ga2("c:file"), ("CA", "file"))
+            self.failUnlessEqual(ga2("c:dir/file"), ("CA", "dir/file"))
         self.failUnlessEqual(ga2("work:"), ("WA", ""))
         self.failUnlessEqual(ga2("work:file"), ("WA", "file"))
         self.failUnlessEqual(ga2("work:dir/file"), ("WA", "dir/file"))
         self.failUnlessEqual(ga2("URI:stuff"), ("URI:stuff", ""))
         self.failUnlessEqual(ga2("URI:stuff:./file"), ("URI:stuff", "file"))
         self.failUnlessEqual(ga2("URI:stuff:./dir/file"), ("URI:stuff", "dir/file"))
+        self.failUnlessRaises(common.UnknownAliasError, ga2, "missing:")
+        self.failUnlessRaises(common.UnknownAliasError, ga2, "missing:dir")
+        self.failUnlessRaises(common.UnknownAliasError, ga2, "missing:dir/file")
 
         def ga3(path):
             old = common.pretend_platform_uses_lettercolon
@@ -347,6 +365,9 @@ class CLI(unittest.TestCase):
         self.failUnlessEqual(ga3("URI:stuff"), ("URI:stuff", ""))
         self.failUnlessEqual(ga3("URI:stuff:./file"), ("URI:stuff", "file"))
         self.failUnlessEqual(ga3("URI:stuff:./dir/file"), ("URI:stuff", "dir/file"))
+        self.failUnlessRaises(common.UnknownAliasError, ga3, "missing:")
+        self.failUnlessRaises(common.UnknownAliasError, ga3, "missing:dir")
+        self.failUnlessRaises(common.UnknownAliasError, ga3, "missing:dir/file")
 
 
 class Help(unittest.TestCase):