Improve backslash/newline handling to adhere to POSIX requirements.

1 files changed, 76 insertions, 0 deletions

diff --git a/tests/scripts/misc/bs-nl b/tests/scripts/misc/bs-nl
new file mode 100644
index 0000000..979abb5
--- /dev/null
+++ b/tests/scripts/misc/bs-nl
@@ -0,0 +1,76 @@
+#                                                                    -*-perl-*-
+$description = "Test backslash-newline handling.";
+
+$details = "";
+
+# TEST #1
+# -------
+
+# Backslash-newlines in recipes
+
+# These are basic backslash-newlines with no tricks
+run_make_test("fast:;\@echo fa\\\nst\n",
+              '', 'fast');
+
+run_make_test("slow:;\@: no-op; echo sl\\\now\n",
+              '', 'slow');
+
+run_make_test("dquote:;\@echo \"dqu\\\note\"\n",
+              '', 'dquote');
+
+run_make_test("squote:;\@echo 'squ\\\note'\n",
+              '', "squ\\\note");
+
+# Ensure that a leading prefix character is omitted
+run_make_test("fast:;\@echo fa\\\n\tst\n",
+              '', 'fast');
+
+run_make_test("slow:;\@: no-op; echo sl\\\n\tow\n",
+              '', 'slow');
+
+run_make_test("dquote:;\@echo \"dqu\\\n\tote\"\n",
+              '', 'dquote');
+
+run_make_test("squote:;\@echo 'squ\\\n\tote'\n",
+              '', "squ\\\note");
+
+# Ensure that ONLY the leading prefix character is omitted
+run_make_test("fast:;\@echo fa\\\n\t  st\n",
+              '', 'fa st');
+
+run_make_test("slow:;\@: no-op; echo sl\\\n\t\tow\n",
+              '', "sl ow");
+
+run_make_test("dquote:;\@echo \"dqu\\\n\t    ote\"\n",
+              '', 'dqu    ote');
+
+run_make_test("squote:;\@echo 'squ\\\n\t\t   ote'\n",
+              '', "squ\\\n\t   ote");
+
+# Backslash-newlines in variable values
+
+# Simple
+run_make_test("
+var = he\\\nllo
+var:;\@echo '|\$(var)|'",
+              '', "|he llo|");
+
+# Preserve preceding space
+run_make_test("
+var = he  \\\nllo
+var:;\@echo '|\$(var)|'",
+              '', "|he   llo|");
+
+# Remove leading space
+run_make_test("
+var = he\\\n    llo
+var:;\@echo '|\$(var)|'",
+              '', "|he llo|");
+
+# One space per bs-nl
+run_make_test("
+var = he\\\n\\\n\\\n    llo
+var:;\@echo '|\$(var)|'",
+              '', "|he   llo|");
+
+1;