apenwarr-redo/t/360-symlinks/clean.do

rm -f *~ .*~ a b *.extra *.final *.ran dir/*.[123] *.[123]
rm -rf dir
Further improve handling of symlink targets/deps. In commit redo-0.11-4-g34669fb, we changed os.stat into os.lstat to avoid false positives in the "manual override" detector: a .do file that generates $3 as a symlink would trigger manual override if the target of that symlink ever changed, which is incorrect. Unfortunately using os.lstat() leads to a different problem: if X depends on Y and Y is a symlink to Z, then X would not be rebuilt when Z changes, which is clearly wrong. The fix is twofold: 1. read_stamp() should change on changes to both the link itself, and the target of the link. 2. We shouldn't mark a target as overridden under so many situations. We'll use only the primary mtime of the os.lstat(), not all the other bits in the stamp. Step 2 fixes a few other false positives also. For example, if you 'cp -a' a whole tree to another location, the st_ino of all the targets will change, which would trigger a mass of "manual override" warnings. Although a change in inode is sufficient to count an input as having changed (just to be extra safe), it should not be considered a manual override. Now we can distinguish between the two. Because the stamp format has changed, update the SCHEMA_VER field. I should have done this every other time I changed the stamp format, but I forgot. Sorry. That leads to spurious "manually modified" warnings after upgrading redo. 2018-11-21 07:19:20 -05:00			`rm -f ~ .~ a b .extra .final .ran dir/.[123] *.[123]`
			`rm -rf dir`