test-container: Support $(complocaledir) and mkdirp.

Expand the support infrastructure:
- Create $(complocaledir) in the testroot.pristine to support localedef.
- Add the variable $complocaledir to script support.
- Add the script command 'mkdirp'.

All localedef tests which run with default paths need to have the
$(complocaledir) created in testroot.pristine. The localedef binary
will not by itself create the default path, but it will write into
the path. By adding this we can simplify the localedef tests.

The variable $complocaledir is the value of the configured
$(complocaledir) which is the location of the compiled locales that
will be searched by the runtime by default.

The command mkdirp will be available in script setup and will
be equivalent to running `mkdir -p`.

The variable and command can be used to write more complex tests.

Reviewed-by: DJ Delorie <dj@redhat.com>

Makefile

@@ -588,6 +588,9 @@ $(objpfx)testroot.pristine/install.stamp :
 	# We need a working /bin/sh for some of the tests.
 	test -d $(objpfx)testroot.pristine/bin || \
 	  mkdir $(objpfx)testroot.pristine/bin
+	# We need the compiled locale dir for localedef tests.
+	test -d $(objpfx)testroot.pristine/$(complocaledir) || \
+	  mkdir -p $(objpfx)testroot.pristine/$(complocaledir)
 	cp $(objpfx)support/shell-container $(objpfx)testroot.pristine/bin/sh
 	cp $(objpfx)support/echo-container $(objpfx)testroot.pristine/bin/echo
 	cp $(objpfx)support/true-container $(objpfx)testroot.pristine/bin/true

support/test-container.c

@@ -72,6 +72,10 @@ int verbose = 0;
 
    * mkdir $buildroot/testroot.pristine/
    * install into it
+     * default glibc install
+     * create /bin for /bin/sh
+     * create $(complocaledir) so localedef tests work with default paths.
+     * install /bin/sh, /bin/echo, and /bin/true.
    * rsync to $buildroot/testroot.root/
 
    "Per-test" actions:
@@ -97,9 +101,23 @@ int verbose = 0;
 	 rm FILE
 	 cwd PATH
 	 exec FILE
-	 FILE must start with $B/, $S/, $I/, $L/, or /
+	 mkdirp MODE DIR
-	  (expands to build dir, source dir, install dir, library dir
+
-	   (in container), or container's root)
+       variables:
+	 $B/ build dir, equivalent to $(common-objpfx)
+	 $S/ source dir, equivalent to $(srcdir)
+	 $I/ install dir, equivalent to $(prefix)
+	 $L/ library dir (in container), equivalent to $(libdir)
+	 $complocaledir/ compiled locale dir, equivalent to $(complocaledir)
+	 / container's root
+
+	 If FILE begins with any of these variables then they will be
+	 substituted for the described value.
+
+	 The goal is to expose as many of the runtime's configured paths
+	 via variables so they can be used to setup the container environment
+	 before execution reaches the test.
+
        details:
          - '#': A comment.
          - 'su': Enables running test as root in the container.
@@ -108,6 +126,8 @@ int verbose = 0;
          - 'rm': A minimal remove files command.
 	 - 'cwd': set test working directory
 	 - 'exec': change test binary location (may end in /)
+	 - 'mkdirp': A minimal "mkdir -p FILE" command.
+
    * mytest.root/postclean.req causes fresh rsync (with delete) after
      test if present
 
@@ -859,6 +879,7 @@ main (int argc, char **argv)
 	    int nt = tokenize (the_line, the_words, 3);
 	    int i;
 
+	    /* Expand variables.  */
 	    for (i = 1; i < nt; ++i)
 	      {
 		if (memcmp (the_words[i], "$B/", 3) == 0)
@@ -875,6 +896,10 @@ main (int argc, char **argv)
 		  the_words[i] = concat (new_root_path,
 					 support_libdir_prefix,
 					 the_words[i] + 2, NULL);
+		else if (memcmp (the_words[i], "$complocaledir/", 15) == 0)
+		  the_words[i] = concat (new_root_path,
+					 support_complocaledir_prefix,
+					 the_words[i] + 14, NULL);
 		/* "exec" and "cwd" use inside-root paths.  */
 		else if (strcmp (the_words[0], "exec") != 0
 			 && strcmp (the_words[0], "cwd") != 0
@@ -892,6 +917,9 @@ main (int argc, char **argv)
 		  the_words[2] = concat (the_words[2], the_words[1], NULL);
 	      }
 
+	    /* Run the following commands in the_words[0] with NT number of
+	       arguments (including the command).  */
+
 	    if (nt == 2 && strcmp (the_words[0], "so") == 0)
 	      {
 		the_words[2] = concat (new_root_path, support_libdir_prefix,
@@ -961,6 +989,14 @@ main (int argc, char **argv)
 	      {
 		be_su = 1;
 	      }
+	    else if (nt == 3 && strcmp (the_words[0], "mkdirp") == 0)
+	      {
+		long int m;
+		errno = 0;
+		m = strtol (the_words[1], NULL, 0);
+		TEST_COMPARE (errno, 0);
+		xmkdirp (the_words[2], m);
+	      }
 	    else if (nt > 0 && the_words[0][0] != '#')
 	      {
 		fprintf (stderr, "\033[31minvalid [%s]\033[0m\n", the_words[0]);