Although I expect this is rather rare, some people may want to build in
a read-write subdir of a read-only tree. Other than some confusing
error reporting, this works fine in redo after the recent changes to
temp file handling, but let's add a test to make sure it stays that
way. The test found a bug in minimal/do, so let's fix that.
Reported-by: Jeff Stearns <jeff.stearns@gmail.com>
Previously, we'd try to put the stdout temp file in the same dir as the
target, if that dir exists. Otherwise we'd walk up the directory tree
looking for a good place. But this would go wrong if the directory we
chose got *deleted* during the run of the .do file.
Instead, we switch to an entirely new design: we use mkstemp() to
generate a temp file in the standard temp file location (probably
/tmp), then open it and immediately delete it, so the .do file can't
cause any unexpected behaviour. After the .do file exits, we use our
still-open fd to the stdout file to read the content back out.
In the old implementation, we also put the $3 in the "adjusted"
location that depended whether the target dir already existed, just for
consistency. But that was never necessary: we didn't create the $3
file, and if the .do script wants to write to $3, it should create the
target dir first anyway. So change it to *always* use a $3 temp
filename in the target dir, which is much simpler and so has fewer edge
cases.
Add t/202-del/deltest4 with some tests for all these edge cases.
Reported-by: Jeff Stearns <jeff.stearns@gmail.com>
This can happen if we create the .tmp file in the same directory as the
target, and the .do file first does "rm -rf" on that directory, then
re-creates it. The result is that the stdout file is lost.
We'll make this a warning if the .do script *didn't* write to stdout
(so the loss is harmless, just weird), and an error if they *did* write
to stdout, which we can detect because we still have an open fd on the
file, so we can fstat() it.
Basically all just missing quotes around shell strings that use $PWD.
Most paths inside a project, since redo uses relative paths, only need
to worry when project-internal directories or filenames have spaces in
them.
Reported-by: Jeff Stearns <jeff.stearns@gmail.com>
Now that the python scripts are all in a "redo" python module, we can
use the "new style" (ahem) package-relative imports. This appeases
pylint, plus avoids confusion in case more than one package has
similarly-named modules.
This removes another instance of magical code running at module import
time. And the process title wasn't really part of the state database
anyway.
Unfortunately this uncovered a bug: the recent change to use
'python -S' makes it not find the setproctitle module if installed.
My goodness, I hate the horrible python easy_install module gunk that
makes startup linearly slower the more modules you have installed,
whether you import them or not, if you don't use -S. But oh well,
we're stuck with it for now.
Merge the two files into env, and make each command explicitly call the
function that sets it up in the way that's needed for that command.
This means we can finally just import all the modules at the top of
each file, without worrying about import order. Phew.
While we're here, remove the weird auto-appending-'all'-to-targets
feature in env.init(). Instead, do it explicitly, and only from redo and
redo-ifchange, only if is_toplevel and no other targets are given.
This avoids a name overlap with the system-installed copy of python.
Since redo adds the redo/ dir to the $PATH before running .do files,
python.do might see its own previously-created target instead of the
"real" python when testing, and create an infinite loop by accident.
They really aren't locks at all, they're a cycle detector. Also rename
REDO_LOCKS to a more meaningful REDO_CYCLES. And we'll move the
CyclicDependencyError exception in here as well, instead of state.py
where it doesn't really belong.
It's time to start preparing for a version of redo that doesn't work
unless we build it first (because it will rely on C modules, and
eventually be rewritten in C altogether).
To get rolling, remove the old-style symlinks to the main programs, and
rename those programs from redo-*.py to redo/cmd_*.py. We'll also move
all library functions into the redo/ dir, which is a more python-style
naming convention.
Previously, install.do was generating wrappers for installing in
/usr/bin, which extend sys.path and then import+run the right file.
This made "installed" redo work quite differently from running redo
inside its source tree. Instead, let's always generate the wrappers in
bin/, and not make anything executable except those wrappers.
Since we're generating wrappers anyway, let's actually auto-detect the
right version of python for the running system; distros can't seem to
agree on what to call their python2 binaries (sigh). We'll fill in the
right #! shebang lines. Since we're doing that, we can stop using
/usr/bin/env, which will a) make things slightly faster, and b) let us
use "python -S", which tells python not to load a bunch of extra crap
we're not using, thus improving startup times.
Annoyingly, we now have to build redo using minimal/do, then run the
tests using bin/redo. To make this less annoying, we add a toplevel
./do script that knows the right steps, and a Makefile (whee!) for
people who are used to typing 'make' and 'make test' and 'make clean'.
