reftest: add sandbox scripts test

tests/reftests/dune.inc

@@ -1532,6 +1532,27 @@
    %{targets}
    (run ./run.exe %{exe:../../src/client/opamMain.exe.exe} %{dep:resolve-variables.test} %{read-lines:testing-env}))))
 
+(rule
+ (alias reftest-sandbox)
+ (enabled_if (and  (or (<> %{env:TESTALL=1} 0) (= %{env:TESTN0REP0=0} 1))))
+ (action
+  (diff sandbox.test sandbox.out)))
+
+(alias
+ (name reftest)
+ (enabled_if (and  (or (<> %{env:TESTALL=1} 0) (= %{env:TESTN0REP0=0} 1))))
+ (deps (alias reftest-sandbox)))
+
+(rule
+ (targets sandbox.out)
+ (deps root-N0REP0)
+ (enabled_if (and  (or (<> %{env:TESTALL=1} 0) (= %{env:TESTN0REP0=0} 1))))
+ (package opam)
+ (action
+  (with-stdout-to
+   %{targets}
+   (run ./run.exe %{exe:../../src/client/opamMain.exe.exe} %{dep:sandbox.test} %{read-lines:testing-env}))))
+
 (rule
  (alias reftest-shared-fetch)
  (enabled_if (and  (or (<> %{env:TESTALL=1} 0) (= %{env:TESTN0REP0=0} 1))))

tests/reftests/sandbox.test

@@ -0,0 +1,35 @@
+N0REP0
+### <pkg:echo.1>
+opam-version: "2.0"
+build: [ "echo" "SUCCESS" "|" "tee" "check-write" ]
+### <pkg:option.1>
+opam-version: "2.0"
+build: [ "opam" "option" "jobs=4" "--cli=2.1"]
+### <pkg:var.1>
+opam-version: "2.0"
+build: [ "opam" "config" "var" "prefix" ]
+### <pkg:tmp.1>
+opam-version: "2.0"
+build: [ "sh" "-c" "echo > /tmp/ech" ]
+### <pkg:tmpdir.1>
+opam-version: "2.0"
+build: [ "sh" "-c" "echo > $TMPDIR/ech" ]
+### opam switch create sdbx --empty
+### OPAMVERBOSE=2
+### opam install echo | grep "^\(\\+\|-) " | sed-cmd echo
++ echo "SUCCESS" "|" "tee" "check-write" (CWD=${BASEDIR}/OPAM/sdbx/.opam-switch/build/echo.1)
+- SUCCESS | tee check-write
+### opam install option | grep "^\(\\+\|-) " | '- .*opamMain.exe' -> '- opam' | sed-cmd opam
++ opam "option" "jobs=4" "--cli=2.1" (CWD=${BASEDIR}/OPAM/sdbx/.opam-switch/build/option.1)
+- 'opam option jobs=4 --cli=2.1' failed.
+- Fatal error:
+- opam: "open" failed on ${BASEDIR}/OPAM/config.lock: Read-only file system
+- No changes have been performed
+# Return code 31 #
+### opam install var | grep "^\(\\+\|-) " | sed-cmd opam
++ opam "config" "var" "prefix" (CWD=${BASEDIR}/OPAM/sdbx/.opam-switch/build/var.1)
+- ${BASEDIR}/OPAM/sdbx
+### opam install tmp | grep "^\(\\+\|-) " | sed-cmd sh
++ sh "-c" "echo > /tmp/ech" (CWD=${BASEDIR}/OPAM/sdbx/.opam-switch/build/tmp.1)
+### opam install tmpdir | grep "^\(\\+\|-) " | sed-cmd sh
++ sh "-c" "echo > $TMPDIR/ech" (CWD=${BASEDIR}/OPAM/sdbx/.opam-switch/build/tmpdir.1)