* master:
Fixed markdown errors in README - code samples now correctly formatted.
Fix use of config.sh in example
log.py, minimal/do: don't use ansi colour codes if $TERM is blank or 'dumb'
Use named constants for terminal control codes.
redo-sh: keep testing even after finding a 'good' shell.
redo-sh.do: hide warning output from 'which' in some shells.
redo-sh.do: wrap long lines.
Handle .do files that start with "#!/" to specify an explicit interpreter.
minimal/do: don't print an error on exit if we don't build anything.
bash completions: also mark 'do' as a completable command.
bash completions: work correctly when $cur is an empty string.
bash completions: call redo-targets for a more complete list.
bash completions: work correctly with subdirs, ie. 'redo t/<tab>'
Sample bash completion rules for redo targets.
minimal/do: faster deletion of stamp files.
minimal/do: delete .tmp files if a build fails.
minimal/do: use ".did" stamp files instead of empty target files.
minimal/do: use posix shell features instead of dirname/basename.
Automatically select a good shell instead of relying on /bin/sh.
Conflicts:
t/clean.do
This includes a fairly detailed test of various known shell bugs from the
autoconf docs.
The idea here is that if redo works on your system, you should be able to
rely on a *good* shell to run your .do files; you shouldn't have to work
around zillions of bugs like autoconf does.
Previously, we would only search for default*.do in the same directory in
the target; now we search parent directories as well.
Let's say we're in a/b/ and trying to build foo.o. If we find
../../default.o.do, then we'll run
cd ../..; sh default.o.do a/b/foo .o $TMPNAME
In other words, we still always chdir to the same directory as the .do file.
But now $1 might have a path in it, not just a basename.
This is slightly inelegant, as the old style
echo foo
echo blah
chmod a+x $3
doesn't work anymore; the stuff you wrote to stdout didn't end up in $3.
You can rewrite it as:
exec >$3
echo foo
echo blah
chmod a+x $3
Anyway, it's better this way, because now we can tell the difference between
a zero-length $3 and a nonexistent one. A .do script can thus produce
either one and we'll either delete the target or move the empty $3 to
replace it, whichever is right.
As a bonus, this simplifies our detection of whether you did something weird
with overlapping changes to stdout and $3.
We would build 'somefile' correctly the first time, but we wouldn't
attach the dependency on somefile to the right $TARGET, so our target would
not auto-rebuild in the future based on somefile.
It actually decreases readability of the .do files - by not making it
explicit when you're going into a subdir.
Plus it adds ambiguity: what if there's a dirname.do *and* a dirname/all?
We could resolve the ambiguity if we wanted, but that adds more code, while
taking out this special case makes *less* code and improves readability.
I think it's the right way to go.
