commit - 9a51a4f9a4d3b07e859786042208a46c9d630566
commit + f22b78bb4f965897447b30faa45acd815cba886b
blob - 88df12a079d2f7743ffca4c6d8d3f1f9dab9f3de
blob + 17f23adf74f0d3a17bcc3c14884f409dcaa56aa7
--- exercise.1
+++ exercise.1
@@ -9,6 +9,8 @@
 .Sh SYNOPSIS
 .Nm exercise
 .Op Fl q
+.Op Fl B Ar dir
+.Op Fl C Ar dir
 .Op Fl p Ar k Ns Sy = Ns Ar pattern
 .Op Ar path ...
 .
@@ -30,6 +32,21 @@ To be run as test suites (see below), files must match
 .Pp
 The options are as follows:
 .Bl -tag -width Ds
+.It Fl B Ar dir
+Find test files relative to the given directory.
+This effectively applies a prefix to any
+.Ar path
+arguments.
+If
+.Ar dir
+is a relative path,
+it applies to the working directory in effect after any
+.Fl C
+option.
+.It Fl C Ar dir
+Change the working directory to
+.Ar dir
+before doing anything else.
 .It Fl p Sy d= Ns Ar pattern
 When searching for tests,
 only descend into directories that match the given pattern.
@@ -167,8 +184,24 @@ directory distributed with the program.
 It shows a useful idiom where a number of test (shell) scripts make use of
 a helper,
 .Pa assert-exercise .
-The helper runs exercise with some test (shell) script to execute and compares
+The helper runs
+.Nm
+with some test (shell) script to execute and compares
 the outcome to expectations.
+.Pp
+An example use of the
+.Fl B
+option is to change (with
+.Fl C )
+into a directory containing some helper files
+and then to use
+.Fl B Pa ..
+(for instance)
+to point back to the top-level test directory.
+This way
+.Ar path
+arguments can be used normally
+but tests find the helper files in their current working directory.
 .
 .Sh SEE ALSO
 .Xr sh 1