Replace Fiwix filelist with parsing builder-hex0's FS structures

And while we're at it, use a more sustainable way of getting the
address of the next file to be written to.

Since builder-hex0 doesn't distinguish directories from zero-length
files, this has a limitation that it won't copy any zero-length
files or empty directories. Only one such file is important for the
bootstrap process (mes/config.h), which is recreated using an
improve step.

lib/generator.py

@@ -85,8 +85,6 @@ def prepare(self, target, using_kernel=False, kernel_bootstrap=False, target_siz
 
         self.distfiles()
 
-        self.create_fiwix_file_list()
-
         if self.repo_path:
             repo_dir = os.path.join(self.external_dir, 'repo-preseeded')
             shutil.copytree(self.repo_path, repo_dir)
@@ -134,30 +132,6 @@ def seed(self):
             if os.path.isfile(os.path.join(seed_dir, entry)):
                 shutil.copy2(os.path.join(seed_dir, entry), os.path.join(self.target_dir, entry))
 
-    @staticmethod
-    def add_fiwix_files(file_list_path, dirpath):
-        """Add files to the list to populate Fiwix file system"""
-        for root, _, filepaths in os.walk(dirpath):
-            if 'stage0-posix' in root:
-                continue
-            with open(file_list_path, 'a', encoding="utf-8") as file_list:
-                for filepath in filepaths:
-                    file_list.write(f"/{os.path.join(root, filepath)}\n")
-
-    def create_fiwix_file_list(self):
-        """Create a list of files to populate Fiwix file system"""
-        file_list_path = os.path.join(self.target_dir, 'steps', 'lwext4-1.0.0-lb1',
-                                      'files', 'fiwix-file-list.txt')
-        shutil.copyfile(os.path.join(self.target_dir, 'steps', 'lwext4-1.0.0-lb1',
-                                     'files', 'early-artifacts-needed-after-fiwix.txt'),
-                        file_list_path)
-
-        save_cwd = os.getcwd()
-        os.chdir(self.target_dir)
-        self.add_fiwix_files(file_list_path, 'steps')
-        self.add_fiwix_files(file_list_path, 'distfiles')
-        os.chdir(save_cwd)
-
     def distfiles(self):
         """Copy in distfiles"""
         def copy_no_network_distfiles(out, early):

seed/script-generator.c

@@ -412,30 +412,13 @@ Directive *interpreter(Directive *directives) {
 	return directives;
 }
 
-void add_to_fiwix_filelist(char *filename) {
-	/* Add the filename to fiwix-file-list.txt */
-	FILE *fiwix_list = fopen("/steps/lwext4-1.0.0-lb1/files/fiwix-file-list.txt", "r");
-	fseek(fiwix_list, 0, SEEK_END);
-	long size = ftell(fiwix_list);
-	char *contents = calloc(size, sizeof(char));
-	fseek(fiwix_list, 0, SEEK_SET);
-	fread(contents, 1, size, fiwix_list);
-	fclose(fiwix_list);
-	fiwix_list = fopen("/steps/lwext4-1.0.0-lb1/files/fiwix-file-list.txt", "w");
-	fwrite(contents, 1, size, fiwix_list);
-	fputs(filename, fiwix_list);
-	fputc('\n', fiwix_list);
-	fclose(fiwix_list);
-}
-
 /* Script generator. */
 FILE *start_script(int id, int bash_build) {
 	/* Create the file /steps/$id.sh */
 	char *filename = calloc(MAX_STRING, sizeof(char));
 	strcpy(filename, "/steps/");
 	strcat(filename, int2str(id, 10, 0));
 	strcat(filename, ".sh");
-	add_to_fiwix_filelist(filename);
 
 	FILE *out = fopen(filename, "w");
 	if (out == NULL) {
@@ -608,12 +591,6 @@ void generate(Directive *directives) {
 			output_call_script(out, "jump", directive->arg, bash_build, 1);
 			fclose(out);
 
-			/*
-			 * This cannot go before here as builder-hex0 does not like having
-			 * multiple files open at once!
-			 */
-			add_to_fiwix_filelist(filename);
-
 			if (bash_build) {
 				out = fopen(filename, "w");
 				if (out == NULL) {

steps/jump/linux.sh

@@ -10,13 +10,14 @@ set -e
 
 # Perform the actual kexec
 if [ "${KERNEL_BOOTSTRAP}" = True ]; then
+    mv "/High Level Prototypes" "/High_Level_Prototypes"
     sync
     # We don't use the gen_initramfs_list.sh script because it is so *SLOW*
     # This emulates the same thing it does
     find / -xdev -type d -printf "dir %p %m %U %G\n" >> /initramfs.list
     find / -xdev -type f -printf "file %p %p %m %U %G\n" >> /initramfs.list
     find / -xdev -type l -printf "slink %p %l %m %U %G\n" >> /initramfs.list
-    kexec-linux "/dev/ram1" "/boot/linux-4.9.10" "!$(command -v gen_init_cpio) /initramfs.list"
+    kexec-linux "/dev/ram1" "/boot/linux-4.9.10" "!gen_init_cpio /initramfs.list | gzip -c"
 else
     mkdir /etc
     # kexec time