Update testscript/doc.go

Co-authored-by: Roger Peppe <rogpeppe@gmail.com>
rogpeppe · Jan 12, 2022 · 37b7340 · 37b7340
1 parent 157e235
commit 37b7340
Showing 1 changed file with 7 additions and 1 deletion.
diff --git a/testscript/doc.go b/testscript/doc.go
@@ -106,7 +106,13 @@ should only run when the condition is satisfied. The predefined conditions are:
  - [symlink] for whether the OS has symbolic link support
  - [exec:prog] for whether prog is available for execution (found by exec.LookPath)
  - [build:tag] for whether the release build tag is set; user-defined build tags
-   are not currently supported
+   are not currently supported. Note that the "build:" prefix
+   distinguishes this set of conditions from the conditions recognized
+   by the gotooltest package - that package has no "build:" prefix and
+   guards based on whether the go tool supports a given tag, but the
+   "build:" tag guards based on whether the binary that's imported the
+   testscript package supports the tag.
+
 
 A condition can be negated: [!short] means to run the rest of the line
 when testing.Short() is false.