Add checks for programs which are required for the test suite to run.
All prerequisite programs are checked for existance, and if any are
missing,
a list of missing programs is printed, and the test suite is aborted.
All programs currently used in the tests, except those in core-utils,
are checked.
#!/bin/sh -e
umask 027
mkdir test1
cd test1
hg init
touch a b
hg add a b
hg ci -m "added a b" -d "0 0"
cd ..
mkdir test2
cd test2
hg init
hg pull ../test1
hg co
chmod +x a
hg ci -m "chmod +x a" -d "0 0"
cd ../test1
echo 123 >>a
hg ci -m "a updated" -d "0 0"
hg pull ../test2
hg heads
hg history
hg -v co -m
ls -l ../test[12]/a > foo
cut -b 0-10 < foo