Add revspec documentation for ':path', ':[0-3]:path' and git-describe

diff --git a/INSTALL b/INSTALL
index ba9778cd4de187878b6445be5fbf490d76879f30..fce6bc39d562271417fe4caeaf2d5dd9691deaf8 100644 (file)
--- a/INSTALL
+++ b/INSTALL
@@ -16,7 +16,7 @@ install" would not work.
 Alternatively you can use autoconf generated ./configure script to
 set up install paths (via config.mak.autogen), so you can write instead
 
-       $ autoconf ;# as yourself if ./configure doesn't exist yet
+       $ make configure ;# as yourself
        $ ./configure --prefix=/usr ;# as yourself
        $ make all doc ;# as yourself
        # make install install-doc ;# as root
@@ -38,6 +38,19 @@ Issues of note:
    has been actively developed since 1997, and people have moved over to
    graphical file managers.
 
+ - 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:
+
+       GIT_EXEC_PATH=`pwd`
+       PATH=`pwd`:$PATH
+       GITPERLLIB=`pwd`/perl/blib/lib
+       export GIT_EXEC_PATH PATH GITPERLLIB
+
  - Git is reasonably self-sufficient, but does depend on a few external
    programs and libraries: