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This is a list of developer tools included in the source repository
but not necessarily shipped in the tarball or binary distributions If you're
viewing it with Emacs, you can try doing Ctl-C Ctl-t browse through
the outline headers.  Ctl-C Ctl-a will unfold them again.

== ais.py ==

AIS packet decoder in Python.  Useful as a check on the C code.
Also, if you have AISHub privileges (see <http://www.aishub.net/>), 
a command like
 
      nc data.aishub.net 4006 | devtools/ais.py -c -v -t RANGE >AIS.LOG 2>&1"

is a handy way to capture filtered AIS samples; RANGE can be a comma-separated
list of AIS types. 

== aidvmtable ==

Generate an asciidoc table of the six-bit encoding used in AIVDM packets.

== cycle_analyzer ==

Finds end-of-cycle sentences from GPS output logs.

== dchroot-exec ==

Very simple wrapper around the DSA version of dchroot
on the Debian porter boxes. dchroot only accepts one command
as argument, nothing else. This wrapper creates a temporary script
which will be executed then.

== editcomment ==

Give this a commit-ID specification.  It will edit the associated comment.
Usual caveats apply; the edited one and all commits after will change IDs,
and pushing them to a repo with the old commits will wreak havoc.
Note also that this cavalierly overwrites refs/original.

== fakeserver ==

Analogue of gpsfake. Impersonates a gpsd, spewing specified data to
clients connecting to localhost:2947

== fakecompare ==

Compare the results from running gpsfake on a logfile between this
machine and a remote one.  Especially useful when remote and local
have different word lengths.

== flock* ==

The files prefixed with flock are the scripts, data files, and 
documentation for the flock-test suite. Read flock-instructions for 
explanation.

== gpsd-debian-regressions.sh ==

Retrieves the latest build logs from Debian's buildds and extracts a
list of failed regression tests, sorted by architecture.

== logextract ==

Extract pure NMEA from an emailed gpsd error log. The output can be fed 
to gpsfake.

== regress-builder ==

This script runs an exhaustive test on combinations of compilation options, 
looking for ones that break the build.

== regressdiff ==

Walk through a pair of text files looking for where they begin to differ.
May be useful for comparing logs when regression tests break.

== striplog ==

Strip leading comment lines from NMEA sentence logs.  gpsfake can do
this itself now, so this script has a lot of dust on it. 

== tablecheck.py ==

Redo bit offsets of AIVDM message layout tables to be conformant with list 
lengths.