Support running of new babashka.process tests (#1711)

Default `BABASHKA_TEST_ENV` to `jvm` for libtests
CI already understands this need, but defaulting in-script avoids
having devs to understand/remember it too.

Alter PATH as required for new babashka.process tests.

In support of babashka/process#163, babashka/process#164

script/lib_tests/run_all_libtests

@@ -2,12 +2,18 @@
 
 set -eo pipefail
 
+: "${BABASHKA_TEST_ENV:=jvm}"
+export BABASHKA_TEST_ENV
+
 if [ "$BABASHKA_TEST_ENV" = "native" ]; then
     BB_CMD="./bb"
 else
     BB_CMD="lein bb"
 fi
 
+export PATH
+PATH=$(pwd)/process/target/test/on-path:$PATH
+
 export BABASHKA_CLASSPATH
 BABASHKA_CLASSPATH=$(clojure -Spath -A:lib-tests)
 

script/lib_tests/run_all_libtests.bat

@@ -1,7 +1,11 @@
+if not defined BABASHKA_TEST_ENV set BABASHKA_TEST_ENV=jvm
+
 if "%BABASHKA_TEST_ENV%" EQU "native" (set BB_CMD=.\bb) else (set BB_CMD=lein bb)
 
 set EDN=lib_tests.edn
 
+set PATH=%CD%\process\target\test\on-path;%PATH%
+
 .\bb -f script/lib_tests/bb_edn_from_deps.clj %EDN%
 
 %BB_CMD% --config %EDN% --deps-root . -f test-resources/lib_tests/babashka/run_all_libtests.clj %*