Merge branch 'maint-1.7.11' into maint

* maint-1.7.11:
  Prepare for 1.7.11.6
  Make the ciabot scripts completely self-configuring in the normal case.
  Improved documentation for the ciabot scripts.
  man: git pull -r is a short for --rebase
  gitcli: describe abbreviation of long options
  rev-list docs: clarify --topo-order description
  Documentation/CodingGuidelines: spell out more shell guidelines
  Documentation: do not mention .git/refs/* directories
  tests: Introduce test_seq

4 files changed, 106 insertions, 23 deletions

diff --git a/contrib/ciabot/INSTALL b/contrib/ciabot/INSTALL
new file mode 100644
index 0000000000..7222961d35
--- /dev/null
+++ b/contrib/ciabot/INSTALL
@@ -0,0 +1,54 @@
+= Installation instructions =
+
+Two scripts are included.  The Python one (ciabot.py) is faster and
+more capable; the shell one (ciabot.sh) is a fallback in case Python
+gives your git hosting site indigestion. (I know of no such sites.)
+
+It is no longer necessary to modify the script in order to put it
+in place; in fact, this is now discouraged. It is entirely
+configurable with the following git config variables:
+
+ciabot.project = name of the project
+ciabot.repo = name of the project repo for gitweb/cgit purposes
+ciabot.xmlrpc  = if true, ship notifications via XML-RPC
+ciabot.revformat = format in which the revision is shown
+
+The revformat variable may have the following values
+raw -> full hex ID of commit
+short -> first 12 chars of hex ID
+describe -> describe relative to last tag, falling back to short
+
+ciabot.project defaults to the directory name of the repository toplevel.
+ciabot.repo defaults to ciabot.project lowercased.
+ciabot.xmlrpc defaults to True
+ciabot.revformat defaults to 'describe'.
+
+This means that in the normal case you need not do any configuration at all,
+however setting ciabot.project will allow the hook to run slightly faster.
+
+Once you've set these variables, try your script with -n to see the
+notification message dumped to stdout and verify that it looks sane.
+
+To live-test these scripts, your project needs to have been registered with
+the CIA site.  Here are the steps:
+
+1. Open an IRC window on irc://freenode/commits or your registered
+   project IRC channel.
+
+2. Run ciabot.py and/or ciabot.sh from any directory under git
+   control.
+
+You should see a notification on the channel for your most recent commit.
+
+After verifying correct function, install one of these scripts either
+in a post-commit hook or in an update hook.
+
+In post-commit, run it without arguments. It will query for
+current HEAD and the latest commit ID to get the information it
+needs.
+
+In update, call it with a refname followed by a list of commits:
+You want to reverse the order git rev-list emits because it lists
+from most recent to oldest.
+
+/path/to/ciabot.py ${refname} $(git rev-list ${oldhead}..${newhead} | tac)
diff --git a/contrib/ciabot/README b/contrib/ciabot/README
index 3b916acece..2dfe1f91f5 100644
--- a/contrib/ciabot/README
+++ b/contrib/ciabot/README
@@ -8,5 +8,4 @@ You probably want the Python version; it's faster, more capable, and
 better documented.  The shell version is maintained only as a fallback
 for use on hosting sites that don't permit Python hook scripts.
 
-You will find installation instructions for each script in its comment
-header.
+See the file INSTALL for installation instructions.
diff --git a/contrib/ciabot/ciabot.py b/contrib/ciabot/ciabot.py
index 8ce04eb9d2..bd24395d4c 100755
--- a/contrib/ciabot/ciabot.py
+++ b/contrib/ciabot/ciabot.py
@@ -10,11 +10,9 @@
 # usage: ciabot.py [-V] [-n] [-p projectname]  [refname [commits...]]
 #
 # This script is meant to be run either in a post-commit hook or in an
-# update hook.  If there's nothing unusual about your hosting setup,
-# you can specify the project name and repo with config variables and
-# avoid having to modify this script.  Try it with -n to see the
-# notification mail dumped to stdout and verify that it looks
-# sane. With -V it dumps its version and exits.
+# update hook. Try it with -n to see the notification mail dumped to
+# stdout and verify that it looks sane. With -V it dumps its version
+# and exits.
 #
 # In post-commit, run it without arguments. It will query for
 # current HEAD and the latest commit ID to get the information it
@@ -27,12 +25,17 @@
 # /path/to/ciabot.py ${refname} $(git rev-list ${oldhead}..${newhead} | tac)
 #
 # Configuration variables affecting this script:
-# ciabot.project = name of the project (required)
+#
+# ciabot.project = name of the project
 # ciabot.repo = name of the project repo for gitweb/cgit purposes
 # ciabot.xmlrpc  = if true (default), ship notifications via XML-RPC
 # ciabot.revformat = format in which the revision is shown
 #
-# The ciabot.repo value defaults to ciabot.project lowercased.
+# ciabot.project defaults to the directory name of the repository toplevel.
+# ciabot.repo defaults to ciabot.project lowercased.
+#
+# This means that in the normal case you need not do any configuration at all,
+# but setting the project name will speed it up slightly.
 #
 # The revformat variable may have the following values
 # raw -> full hex ID of commit
@@ -102,7 +105,7 @@ toaddr = "cia@cia.vc"
 # Identify the generator script.
 # Should only change when the script itself gets a new home and maintainer.
 generator = "http://www.catb.org/~esr/ciabot.py"
-version = "3.5"
+version = "3.6"
 
 def do(command):
     return commands.getstatusoutput(command)[1]
@@ -192,10 +195,17 @@ if __name__ == "__main__":
             print "ciabot.py: version", version
             sys.exit(0)
 
-    # Cough and die if user has not specified a project
+    # The project variable defaults to the name of the repository toplevel.
     if not project:
-        sys.stderr.write("ciabot.py: no project specified, bailing out.\n")
-        sys.exit(1)
+        here = os.getcwd()
+        while True:
+            if os.path.exists(os.path.join(here, ".git")):
+                project = os.path.basename(here)
+                break
+            elif here == '/':
+                sys.stderr.write("ciabot.py: no .git below root!\n")
+                sys.exit(1)
+            here = os.path.dirname(here)
 
     if not repo:
         repo = project.lower()
diff --git a/contrib/ciabot/ciabot.sh b/contrib/ciabot/ciabot.sh
index dde74004cb..3fbbc534ae 100755
--- a/contrib/ciabot/ciabot.sh
+++ b/contrib/ciabot/ciabot.sh
@@ -21,11 +21,9 @@
 # usage: ciabot.sh [-V] [-n] [-p projectname] [refname commit]
 #
 # This script is meant to be run either in a post-commit hook or in an
-# update hook.  If there's nothing unusual about your hosting setup,
-# you can specify the project name and repo with config variables and
-# avoid having to modify this script.  Try it with -n to see the
-# notification mail dumped to stdout and verify that it looks
-# sane. With -V it dumps its version and exits.
+# update hook. Try it with -n to see the notification mail dumped to
+# stdout and verify that it looks sane. With -V it dumps its version
+# and exits.
 #
 # In post-commit, run it without arguments. It will query for
 # current HEAD and the latest commit ID to get the information it
@@ -44,11 +42,16 @@
 # most recent to least - better to ship notifactions from oldest to newest.
 #
 # Configuration variables affecting this script:
-# ciabot.project = name of the project (makes -p option unnecessary)
+#
+# ciabot.project = name of the project
 # ciabot.repo = name of the project repo for gitweb/cgit purposes
 # ciabot.revformat = format in which the revision is shown
 #
-# The ciabot.repo defaults to ciabot.project lowercased.
+# ciabot.project defaults to the directory name of the repository toplevel.
+# ciabot.repo defaults to ciabot.project lowercased.
+#
+# This means that in the normal case you need not do any configuration at all,
+# but setting the project name will speed it up slightly.
 #
 # The revformat variable may have the following values
 # raw -> full hex ID of commit
@@ -64,10 +67,27 @@
 # shpped from an update in their actual order.)
 #
 
-# The project as known to CIA. You can also hardwire this or set it with a
-# -p option.
+# The project as known to CIA. You can set this with a -p option,
+# or let it default to the directory name of the repo toplevel.
 project=$(git config --get ciabot.project)
 
+if [ -z $project ]
+then
+    here=`pwd`;
+    while :; do
+	if [ -d $here/.git ]
+	then
+	    project=`basename $here`
+	    break
+	elif [ $here = '/' ]
+	then
+	    echo "ciabot.sh: no .git below root!"
+	    exit 1
+	fi
+	here=`dirname $here`
+    done
+fi
+
 # Name of the repo for gitweb/cgit purposes
 repo=$(git config --get ciabot.repo)
 [ -z $repo] && repo=$(echo "${project}" | tr '[A-Z]' '[a-z]')
@@ -100,7 +120,7 @@ urlprefix="http://${host}/cgi-bin/cgit.cgi/${repo}/commit/?id="
 # Identify the script. The 'generator' variable should change only
 # when the script itself gets a new home and maintainer.
 generator="http://www.catb.org/~esr/ciabot/ciabot.sh"
-version=3.4
+version=3.5
 
 # Addresses for the e-mail
 from="CIABOT-NOREPLY@${hostname}"