Ignore PWD, OLDPWD, and shell var DIRSTACK

bash-env-json

@@ -40,12 +40,16 @@ function capture() {
     local -n _capture_env="$1"
     local -n _capture_shellvars="$2"
     local _name _value
-    # some shell variables leak into our environment, so inhibit that:
-    local -A _inhibit_shellvars=([_value]=X [BASH_LINENO]=X [COLUMNS]=X [LINES]=X)
+    # inhibit env vars which are side-effects of cd
+    local -A _inhibit_envvars=([PWD]=X [OLDPWD]=X)
+    # some shell variables leak into our environment, so inhibit those, along with side-effects of cd
+    local -A _inhibit_shellvars=([_value]=X [BASH_LINENO]=X [COLUMNS]=X [LINES]=X [DIRSTACK]=X)
 
     # environment variables
     while IFS='=' read -r -d '' _name _value; do
-        _capture_env["$_name"]="${_value}"
+        if test ! "${_inhibit_envvars[$_name]+EXISTS}"; then
+            _capture_env["$_name"]="${_value}"
+        fi
     done < <(_env -0)
 
     # shellvars
@@ -54,7 +58,7 @@ function capture() {
         set | _sed -n -e '/^[a-zA-Z_][a-zA-Z_0-9]*=/s/=.*$//p'
         set +o posix
     ); do
-        if test -v "$_name" -a ! "${_capture_env[$_name]+EXISTS}" -a ! "${_inhibit_shellvars[$_name]+EXISTS}"; then
+        if test -v "$_name" -a ! "${_capture_env[$_name]+EXISTS}" -a ! "${_inhibit_envvars[$_name]+EXISTS}" -a ! "${_inhibit_shellvars[$_name]+EXISTS}"; then
             _capture_shellvars["$_name"]="${!_name}"
         fi
     done

tests.bats

@@ -51,3 +51,7 @@ function test_case() {
 @test "shell-function-error" {
 	test_case shell-function-error --shellfns f
 }
+
+@test "cd-does-nothing" {
+	test_case cd-does-nothing
+}

tests/cd-does-nothing.env

@@ -0,0 +1 @@
+cd ${TMPDIR:-/tmp}

tests/cd-does-nothing.json

@@ -0,0 +1,4 @@
+{
+  "env": {},
+  "shellvars": {}
+}