make static-http work with empty repos (issue965)

mercurial/statichttprepo.py

@@ -1,78 +1,86 b''
 # statichttprepo.py - simple http repository class for mercurial
 #
 # This provides read-only repo access to repositories exported via static http
 #
 # Copyright 2005-2007 Matt Mackall <[e-mail]>
 #
 # This software may be used and distributed according to the terms
 # of the GNU General Public License, incorporated herein by reference.
 
 from i18n import _
 import changelog, filelog, httprangereader
-import repo, localrepo, manifest, os, urllib, urllib2, util
+import repo, localrepo, manifest, util
+import urllib, urllib2, errno
 
 class rangereader(httprangereader.httprangereader):
     def read(self, size=None):
         try:
             return httprangereader.httprangereader.read(self, size)
         except urllib2.HTTPError, inst:
-            raise IOError(None, inst)
+            num = inst.code == 404 and errno.ENOENT or None
+            raise IOError(num, inst)
         except urllib2.URLError, inst:
             raise IOError(None, inst.reason[1])
 
 def opener(base):
     """return a function that opens files over http"""
     p = base
     def o(path, mode="r"):
         f = "/".join((p, urllib.quote(path)))
         return rangereader(f)
     return o
 
 class statichttprepository(localrepo.localrepository):
     def __init__(self, ui, path):
         self._url = path
         self.ui = ui
 
         self.path = path.rstrip('/') + "/.hg"
         self.opener = opener(self.path)
+
         # find requirements
         try:
             requirements = self.opener("requires").read().splitlines()
-        except IOError:
+        except IOError, inst:
+            if inst.errno == errno.ENOENT:
+                msg = _("'%s' does not appear to be an hg repository") % path
+                raise repo.RepoError(msg)
+            else:
             requirements = []
+
         # check them
         for r in requirements:
             if r not in self.supported:
                 raise repo.RepoError(_("requirement '%s' not supported") % r)
 
         # setup store
         if "store" in requirements:
             self.encodefn = util.encodefilename
             self.decodefn = util.decodefilename
             self.spath = self.path + "/store"
         else:
             self.encodefn = lambda x: x
             self.decodefn = lambda x: x
             self.spath = self.path
         self.sopener = util.encodedopener(opener(self.spath), self.encodefn)
 
         self.manifest = manifest.manifest(self.sopener)
         self.changelog = changelog.changelog(self.sopener)
         self.tagscache = None
         self.nodetagscache = None
         self.encodepats = None
         self.decodepats = None
 
     def url(self):
         return 'static-' + self._url
 
     def dev(self):
         return -1
 
     def local(self):
         return False
 
 def instance(ui, path, create):
     if create:
         raise util.Abort(_('cannot create new static-http repository'))
     return statichttprepository(ui, path[7:])

tests/test-static-http

@@ -1,66 +1,81 b''
 #!/bin/sh
 
 cp "$TESTDIR"/printenv.py .
 
 http_proxy= hg clone static-http://localhost:$HGPORT/ copy
 echo $?
 test -d copy || echo copy: No such file or directory
 
 # This server doesn't do range requests so it's basically only good for
 # one pull
 cat > dumb.py <<EOF
 import BaseHTTPServer, SimpleHTTPServer, os, signal
 
 def run(server_class=BaseHTTPServer.HTTPServer,
         handler_class=SimpleHTTPServer.SimpleHTTPRequestHandler):
     server_address = ('localhost', int(os.environ['HGPORT']))
     httpd = server_class(server_address, handler_class)
     httpd.serve_forever()
 
 signal.signal(signal.SIGTERM, lambda x: sys.exit(0))
 run()
 EOF
 
 python dumb.py 2>/dev/null &
 echo $! >> $DAEMON_PIDS
 
 mkdir remote
 cd remote
 hg init
 echo foo > bar
 hg add bar
 hg commit -m"test" -d "1000000 0"
 hg tip
 
 cd ..
 
 http_proxy= hg clone static-http://localhost:$HGPORT/remote local | sed -e 's,:[0-9][0-9]*/,/,'
 
 cd local
 hg verify
 cat bar
 
 cd ../remote
 echo baz > quux
 hg commit -A -mtest2 -d '100000000 0'
 
 cd ../local
 echo '[hooks]' >> .hg/hgrc
 echo 'changegroup = python ../printenv.py changegroup' >> .hg/hgrc
 http_proxy= hg pull | sed -e 's,:[0-9][0-9]*/,/,'
 
 echo '% test with "/" URI (issue 747)'
 cd ..
 hg init
 echo a > a
 hg add a
 hg ci -ma
 
 http_proxy= hg clone static-http://localhost:$HGPORT/ local2 | sed -e 's,:[0-9][0-9]*/,/,'
 
 cd local2
 hg verify
 cat a
 hg paths | sed -e 's,:[0-9][0-9]*/,/,'
 
+echo '% test with empty repo (issue965)'
+cd ..
+hg init remotempty
+
+http_proxy= hg clone static-http://localhost:$HGPORT/remotempty local3 | sed -e 's,:[0-9][0-9]*/,/,'
+
+cd local3
+hg verify
+hg paths | sed -e 's,:[0-9][0-9]*/,/,'
+
+echo '% test with non-repo'
+cd ..
+mkdir notarepo
+http_proxy= hg clone static-http://localhost:$HGPORT/notarepo local3 2>&1 | sed -e 's,:[0-9][0-9]*/,/,'
+
 kill $!

tests/test-static-http.out

@@ -1,44 +1,55 b''
 abort: Connection refused
 255
 copy: No such file or directory
 changeset:   0:53e17d176ae6
 tag:         tip
 user:        test
 date:        Mon Jan 12 13:46:40 1970 +0000
 summary:     test
 
 requesting all changes
 adding changesets
 adding manifests
 adding file changes
 added 1 changesets with 1 changes to 1 files
 1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 checking changesets
 checking manifests
 crosschecking files in changesets and manifests
 checking files
 1 files, 1 changesets, 1 total revisions
 foo
 adding quux
 changegroup hook: HG_NODE=34401e0e9971e9720b613d9089ffa9a6eefb3d2d HG_SOURCE=pull HG_URL=static-http://localhost/remote 
 pulling from static-http://localhost/remote
 searching for changes
 adding changesets
 adding manifests
 adding file changes
 added 1 changesets with 1 changes to 1 files
 (run 'hg update' to get a working copy)
 % test with "/" URI (issue 747)
 requesting all changes
 adding changesets
 adding manifests
 adding file changes
 added 1 changesets with 1 changes to 1 files
 1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 checking changesets
 checking manifests
 crosschecking files in changesets and manifests
 checking files
 1 files, 1 changesets, 1 total revisions
 a
 default = static-http://localhost/
+% test with empty repo (issue965)
+no changes found
+0 files updated, 0 files merged, 0 files removed, 0 files unresolved
+checking changesets
+checking manifests
+crosschecking files in changesets and manifests
+checking files
+0 files, 0 changesets, 0 total revisions
+default = static-http://localhost/remotempty
+% test with non-repo
+abort: 'http://localhost/notarepo' does not appear to be an hg repository!