Merge pull request #22 from stikonas/bash_parser

Bash parser

README.md

@@ -181,14 +181,7 @@ old tooling instead.
 
 #### Part 7: sed 4.0.7
 
-You are most likely aware of GNU `sed`, a line editor. Here, we had to make a
+You are most likely aware of GNU `sed`, a line editor.
-compromise between two versions:
-
-- 1.18: fully functional `s/a/b`, but no `-i`.
-- 4.0.7: fully functional `-i`, but broken `s/a/b`.
-
-We opted for the latter, as otherwise there would be no patching of files for
-quite some time. We can delete lines from files now!
 
 #### Part 8: tar 1.12
 
@@ -252,16 +245,17 @@ be useful later for autotools.
 of standard UNIX utilities derived from code by Caldera and Sun. Differently from
 the analogous utilities from the GNU project, they can be compiled with a simple `Makefile`.
 
-#### Part 21: bash 2.05b
+#### Part 18: bash 2.05b
 
 GNU `bash` is the most well known shell and the most complex piece of software
 so far. However, it comes with a number of great benefits over kaem, including
 proper POSIX sh support, globbing, etc.
 
-NOTE: Currently, there is a bison pre-generated file here, which we are working
+Bash ships with a bison pre-generated file here which we delete. Unfortunately,
-to remove.
+we have not bootstrapped bison but fortunately for us, heirloom yacc is able to
+cope here.
 
-#### Part 22: m4 1.4
+#### Part 19: m4 1.4
 
 `m4` is the first piece of software we need in the autotools suite. It allows
 macros to be defined and files to be generated from those macros.

sysa/bash-2.05b/bash-2.05b.kaem

@@ -17,6 +17,7 @@ cp ../../mk/common.mk common.mk
 touch config.h
 touch include/version.h
 touch include/pipesize.h
+rm y.tab.c y.tab.h
 
 # Patch
 patch -Np0 -i ../../patches/mes-libc.patch

sysa/bash-2.05b/mk/main.mk

@@ -78,6 +78,9 @@ mksignames: $(MKSIGNAMES_OBJS)
 signames.h: mksignames
 	./mksignames $@
 
+y.tab.c: parse.y
+	yacc -d $^
+
 trap.c: signames.h
 
 bash: libsh.a libglob.a libtilde.a $(OBJS)