upload-pack: Improve error message when bad ref requested

diff --git a/INSTALL b/INSTALL
index be504c95e1f092edaf524064d49ba30adc57dc9b..59200b730ec00a63f981691f7fd37f2eacb11653 100644 (file)
--- a/INSTALL
+++ b/INSTALL
@@ -38,13 +38,17 @@ Issues of note:
    Interactive Tools package still can install "git", but you can build it
    with --disable-transition option to avoid this.
 
- - You can use git after building but without installing if you
-   wanted to.  Various git commands need to find other git
-   commands and scripts to do their work, so you would need to
-   arrange a few environment variables to tell them that their
-   friends will be found in your built source area instead of at
-   their standard installation area.  Something like this works
-   for me:
+ - You can use git after building but without installing if you want
+   to test drive it.  Simply run git found in bin-wrappers directory
+   in the build directory, or prepend that directory to your $PATH.
+   This however is less efficient than running an installed git, as
+   you always need an extra fork+exec to run any git subcommand.
+
+   It is still possible to use git without installing by setting a few
+   environment variables, which was the way this was done
+   traditionally.  But using git found in bin-wrappers directory in
+   the build directory is far simpler.  As a historical reference, the
+   old way went like this:
 
        GIT_EXEC_PATH=`pwd`
        PATH=`pwd`:$PATH
@@ -153,3 +157,36 @@ Issues of note:
    It has been reported that docbook-xsl version 1.72 and 1.73 are
    buggy; 1.72 misformats manual pages for callouts, and 1.73 needs
    the patch in contrib/patches/docbook-xsl-manpages-charmap.patch
+
+   Users attempting to build the documentation on Cygwin may need to ensure
+   that the /etc/xml/catalog file looks something like this:
+
+   <?xml version="1.0"?>
+   <!DOCTYPE catalog PUBLIC
+      "-//OASIS//DTD Entity Resolution XML Catalog V1.0//EN"
+      "http://www.oasis-open.org/committees/entity/release/1.0/catalog.dtd"
+   >
+   <catalog xmlns="urn:oasis:names:tc:entity:xmlns:xml:catalog">
+     <rewriteURI
+       uriStartString = "http://docbook.sourceforge.net/release/xsl/current"
+       rewritePrefix = "/usr/share/sgml/docbook/xsl-stylesheets"
+     />
+     <rewriteURI
+       uriStartString="http://www.oasis-open.org/docbook/xml/4.5"
+       rewritePrefix="/usr/share/sgml/docbook/xml-dtd-4.5"
+     />
+  </catalog>
+
+  This can be achieved with the following two xmlcatalog commands:
+
+  xmlcatalog --noout \
+     --add rewriteURI \
+        http://docbook.sourceforge.net/release/xsl/current \
+        /usr/share/sgml/docbook/xsl-stylesheets \
+     /etc/xml/catalog
+
+  xmlcatalog --noout \
+     --add rewriteURI \
+         http://www.oasis-open.org/docbook/xml/4.5/xsl/current \
+         /usr/share/sgml/docbook/xml-dtd-4.5 \
+     /etc/xml/catalog