Fix some environment-dependent tests.

* gash/environment.scm (initial-variables): Add 'SHELL' and 'SHELLOPTS'.
* tests/100-cd.sh, tests/100-cd.stdout: Use '/tmp' instead of '/bin'.
* tests/50-redirect-in-out.sh, tests/50-redirect-space.sh,
tests/50-redirect.sh: Use '/tmp' and PID for temporary files.
* tests/50-redirect-sed.sh: Make sure 'DESTDIR' is unset and use
'/bin/GASH' in place of '/bin/gash'.
* tests/50-redirect-sed.stdout, tests/data/diff.scm: Use '/bin/GASH' in
place of '/bin/gash'.
* Makefile.am (FULL_TESTS): Add tests/50-redirect-sed.sh,
tests/50-redirect-space.sh, and tests/100-cd.sh; remove
tests/50-redirect-merge.sh.
(BROKEN_TESTS): Remove tests/10-if-redirect.sh,
tests/50-redirect-sed.sh, tests/50-redirect-space.sh, and
tests/100-cd.sh; add tests/50-redirect-merge.sh.

Co-authored-by: Timothy Sample <samplet@ngyro.com>

Makefile.am

@@ -210,7 +210,8 @@ FULL_TESTS =                                    \
   tests/50-redirect-in.sh                       \
   tests/50-redirect-append.sh                   \
   tests/50-redirect-pipe.sh                     \
-  tests/50-redirect-merge.sh                    \
+  tests/50-redirect-sed.sh                      \
+  tests/50-redirect-space.sh                    \
   tests/50-redirect-in-out.sh                   \
   tests/60-function.sh                          \
   tests/60-function-at.sh                       \
@@ -223,6 +224,7 @@ FULL_TESTS =                                    \
   tests/70-slash.sh                             \
   tests/70-slash-string.sh                      \
   tests/70-slash-string-slash.sh                \
+  tests/100-cd.sh                               \
   tests/100-cd-foo.sh                           \
   tests/100-test.sh                             \
   tests/100-test-file.sh                        \
@@ -247,10 +249,7 @@ XFAIL_TESTS =                                   \
 # that pass or fail based on environmental
 # factors.
 BROKEN_TESTS =                                  \
-  tests/10-if-redirect.sh                       \
-  tests/50-redirect-sed.sh                      \
-  tests/50-redirect-space.sh                    \
-  tests/100-cd.sh
+  tests/50-redirect-merge.sh
 
 EXTRA_DIST =                                    \
   scripts/gash.in

gash/environment.scm

@@ -108,7 +108,9 @@
     (alist->hash-table
      (map (match-lambda
             ((name . value) `(,name . ,(vector value #t #f))))
-          (append `(("PWD" . ,(initial-pwd env)))
+          (append `(("PWD" . ,(initial-pwd env))
+                    ("SHELL" . ,(car (command-line)))
+                    ("SHELLOPTS" . ""))
                   env)))))
 
 (define *variables* (initial-variables))

tests/100-cd.sh

@@ -1,2 +1,2 @@
-cd /bin
+cd /tmp
 pwd

tests/100-cd.stdout

@@ -1 +1 @@
-/bin
+/tmp

tests/50-redirect-in-out.sh

@@ -1,3 +1,3 @@
-cat < tests/data/foo > bar
-cat bar
-rm bar
+cat < tests/data/foo > /tmp/bar$$
+cat /tmp/bar$$
+rm /tmp/bar$$

tests/50-redirect-sed.sh

@@ -1,5 +1,6 @@
+unset DESTDIR
 sed \
-    -e "s,^#! /bin/sh,#! /bin/gash," \
+    -e "s,^#! /bin/sh,#! /bin/GASH," \
     tests/data/diff.scm > $DESTDIR/tmp/diff.scm
 cat $DESTDIR/tmp/diff.scm
 rm $DESTDIR/tmp/diff.scm

tests/50-redirect-sed.stdout

@@ -1,3 +1,3 @@
-#! /bin/gash
+#! /bin/GASH
 !#
 

tests/50-redirect-space.sh

@@ -1,3 +1,3 @@
-echo foo > bar
-cat bar
-rm bar
+echo foo > /tmp/bar$$
+cat /tmp/bar$$
+rm /tmp/bar$$

tests/50-redirect.sh

@@ -1,3 +1,3 @@
-echo foo 1>./bar
-cat bar
-rm bar
+echo foo 1>/tmp/bar$$
+cat /tmp/bar$$
+rm /tmp/bar$$

tests/data/diff.scm

@@ -1,3 +1,3 @@
-#! /bin/sh
+#! /bin/GASH
 !#