ref: 4db2895318842a451a5036652ea9373667a603b1
dir: /mbld/parse.myr/
use std
use "types"
use "util"
use "opts"
use "syssel"
pkg bld =
const load : (b : build# -> bool)
$noret const failparse : (p : parser#, msg : byte[:], args : ... -> void)
;;
type parser = struct
/* parse input */
data : byte[:]
rest : byte[:]
fname : byte[:]
fdir : byte[:] /* directory relative to base */
basedir : byte[:]
line : int
/* all targets */
targs : targ[:]
/* default parameter values */
incpath : byte[:][:]
libdeps : byte[:][:]
tstdeps : byte[:][:]
runtime : byte[:]
ldscript: byte[:]
install : bool
/* extracted data for further parsing */
subdirs : byte[:][:]
targsel : syssel((byte[:], targ))#
;;
const load = {b
var ok, sel
var targs
sel = mksyssel(b, "mbld", 0, "mbld")
ok = loadall(b, "bld.proj", "", sel)
targs = sysselfin(sel)
for (name, targ) : targs
std.slpush(&b.all, name)
std.htput(b.targs, name, targ)
;;
if ok
ok = sortdeps(b)
;;
std.slfree(targs)
-> ok
}
const sortdeps = {b
var looped
var marked
var all
all = [][:]
looped = std.mkht()
marked = std.mkht()
for dep : b.all
match gettarg(b.targs, dep)
| `Bin _: all = visit(all, b, "all", dep, looped, marked)
| `Lib _: all = visit(all, b, "all", dep, looped, marked)
| targ: std.slpush(&all, dep)
;;
;;
std.slfree(b.all)
b.all = all
-> true
}
const visit = {all, b, parent, targ, looped, marked
if std.hthas(looped, targ)
std.fatal("cycle in build depgraph involving {}\n", targ)
elif std.hthas(marked, targ)
-> all
;;
std.htput(looped, targ, true)
for (dir, lib, dep) : getdeps(b, parent, targ)
all = visit(all, b, targ, dep, looped, marked)
;;
std.htdel(looped, targ)
std.htput(marked, targ, true)
-> std.slpush(&all, targ)
}
const getdeps = {b, parent, targname
match std.htget(b.targs, targname)
| `std.Some targ:
match targ
| `Bin t: -> t.libdeps
| `Lib t: -> t.libdeps
| _: std.fatal("{} depends on non-library target", parent)
;;
| `std.None:
std.fatal("{}: could not find dependency {}\n", parent, targname)
;;
}
/* recursively load all bld.{proj,sub} files in project */
const loadall = {b, path, dir, sel
var p : parser#
var subbld, subproj, ok
var curbase
p = mkparser(path, dir, b.basedir, sel)
ok = bld.parse(b, p, "")
for targ : p.targs
match targ
| `Bin t: setmyropt(p, t)
| `Lib t: setmyropt(p, t)
| _: /* only myr targets have settable defaults so far */
;;
;;
for sub : p.subdirs
subbld = std.pathcat(sub, "bld.sub")
subproj = std.pathcat(sub, "bld.proj")
/*
bld.sub is a subbuild. It doesn't change the
build root.
*/
if std.fexists(subbld)
loadall(b, subbld, sub, sel)
/*
bld.proj reroots the project -- @/
is relative to the most recent bld.proj
in the heirarchy.
*/
elif std.fexists(sub)
curbase = b.basedir
b.basedir = sub
loadall(b, subproj, sub, sel)
b.basedir = curbase
else
std.fatal("could not open {} or {} \n", subbld, subproj)
;;
std.slfree(subbld)
std.slfree(subproj)
;;
freeparser(p)
-> ok
}
const setmyropt = {p, t
var libdep, tstdep
t.install = t.install && p.install
if t.runtime.len == 0
t.runtime = p.runtime
;;
if t.ldscript.len == 0
t.ldscript = p.ldscript
;;
std.sljoin(&t.incpath, p.incpath)
for l : p.libdeps
libdep = libpath(p, l)
std.slpush(&t.libdeps, libdep)
;;
for l : p.tstdeps
tstdep = libpath(p, l)
std.slpush(&t.tstdeps, tstdep)
;;
}
const parse = {b, p, path
while true
if !target(b, p)
break
;;
;;
skipspace(p)
if p.rest.len > 0
failparse(p, "junk in file near {}\n", p.rest[:std.min(p.rest.len, 10)])
-> false
;;
-> true
}
const target = {b, p
match word(p)
/* targets */
| `std.Some "bin": bintarget(b, p)
| `std.Some "lib": libtarget(b, p)
| `std.Some "test": testtarget(b, p)
| `std.Some "bench": benchtarget(b, p)
| `std.Some "gen": cmdtarget(b, p, "gen", false)
| `std.Some "cmd": cmdtarget(b, p, "cmd", true)
| `std.Some "data": datatarget(b, p, "data")
| `std.Some "man": mantarget(b, p)
| `std.Some "sub": subtarget(b, p)
/* global attributes */
| `std.Some "incpath": incpath(b, p, &p.incpath, "incpath")
| `std.Some "libdeps": incpath(b, p, &p.libdeps, "libdeps")
| `std.Some "testdeps": incpath(b, p, &p.tstdeps, "testdeps")
| `std.Some "runtime": p.runtime = expectword(b, p, "runtime")
| `std.Some "ldscript": p.runtime = expectword(b, p, "ldscript")
| `std.Some "noinst": p.install = false
/* no word */
| `std.Some targtype: failparse(p, "unknown keyword {}\n", targtype)
| `std.None: -> false
;;
-> true
}
const mkparser = {path, dir, basedir, sel
var p
p = std.mk([
.line = 1,
.fname = std.sldup(path),
.fdir = std.sldup(dir),
.basedir = std.sldup(basedir),
.targsel = sel,
.incpath = [][:],
.libdeps = [][:],
.tstdeps = [][:],
.runtime = "",
.ldscript = "",
.install = true,
])
match std.slurp(path)
| `std.Ok d: p.data = d
| `std.Err _: std.fatal("could not open '{}'\n", path)
;;
p.rest = p.data
-> p
}
const freeparser = {p
std.slfree(p.fname)
std.slfree(p.fdir)
std.slfree(p.basedir)
std.slfree(p.subdirs)
std.slfree(p.data)
std.free(p)
}
/* <name>: '=' wordlist ';;' */
const incpath = {b, p, words, name
skipspace(p)
if !matchc(p, '=')
failparse(p, "expected '=' after {}\n", name)
;;
match wordlist(p)
| `std.Some path: words# = path
| `std.None:
;;
skipspace(p)
if !matchc(p, ';') || !matchc(p, ';')
failparse(p, "expected ';;' after {} list\n", name)
;;
}
const expectword = {b, p, attr
match word(p)
| `std.Some w: -> w
| `std.None: failparse(p, "expected word after {}\n", attr)
;;
}
/* bintarget: myrtarget */
const bintarget = {b, p
var t
t = myrtarget(b, p, "bin")
addtarg(p, b, t.name, t.tags, `Bin t)
}
/* libtarget: myrtarget */
const libtarget = {b, p
var t
t = myrtarget(b, p, "lib")
t.islib = true
addtarg(p, b, t.name, t.tags, `Lib t)
}
/* testtarget: myrtarget */
const testtarget = {b, p
var t
t = myrtarget(b, p, "test")
t.istest = true
t.install = false
addtarg(p, b, t.name, t.tags, `Bin t)
}
/* benchtarget: myrtarget */
const benchtarget = {b, p
var t
t = myrtarget(b, p, "bench")
t.isbench = true
t.install = false
addtarg(p, b, t.name, t.tags, `Bin t)
}
/* mantarget: anontarget */
const mantarget = {b, p
var targ
targ = std.mk([
.dir=std.sldup(p.fdir),
.pages=anontarget(p, "man")
])
addtarg(p, b, "__man__", [][:], `Man targ)
}
/* subtarget : anontarget */
const subtarget = {b, p
var subs
subs = anontarget(p, "sub")
for s : subs
std.slpush(&p.subdirs, std.pathcat(p.fdir, s))
;;
}
/* gentarget: wordlist {attrs} = wordlist ;; */
const cmdtarget = {b, p, cmd, iscmd
var outlist, deplist, cmdlist, tags
var durable, istest, isbench
var attrs
var gt
match wordlist(p)
| `std.None: failparse(p, "{} target missing output files\n", cmd)
| `std.Some out:
if iscmd && out.len != 1
failparse(p, "{} target takes one name\n", cmd)
;;
outlist = out
;;
match attrlist(p)
| `std.Some al: attrs = al
| `std.None: failparse(p, "invalid attr list for {}\n", outlist[0])
;;
skipspace(p)
if !matchc(p, '=')
failparse(p, "expected '=' after '{} {}'\n", cmd, outlist[outlist.len-1])
;;
match wordlist(p)
| `std.None: failparse(p, "{} target missing command\n", cmd)
| `std.Some cl:
cmdlist = cl
;;
if !matchc(p, ';') || !matchc(p, ';')
failparse(p, "expected ';;' terminating genfile command, got {}\n", peekc(p))
;;
durable = false
istest = false
isbench = false
deplist = [][:]
tags = [][:]
for elt : attrs
match elt
| ("durable", ""): durable = true
| ("test", ""): istest = true
| ("bench", ""): isbench = true
| ("notest", ""): istest = false
| ("dep", depname): std.slpush(&deplist, depname)
| ("tag", tag): std.slpush(&tags, tag)
| (attr, ""):
failparse(p, "attribute {} not valid on {} targets\n", attr, cmd)
| (attr, val):
failparse(p, "attribute {}={} not valid on {} targets\n", attr, val, cmd)
;;
;;
gt = std.mk([
.dir=std.sldup(p.fdir),
.gen=outlist,
.durable=durable,
.istest=istest,
.isbench=isbench,
.deps=deplist,
.cmd=cmdlist,
.tags=tags,
])
for o : outlist
if iscmd
addtarg(p, b, o, gt.tags, `Cmd gt)
else
addtarg(p, b, o, gt.tags, `Gen gt)
;;
;;
}
/*
myrtarget: name '=' inputlist ';;'
| name attrlist = inputlist ';;'
*/
const myrtarget = {b, p, targ
var ldscript, runtime, install, incpath, tags
var libdeps, name, inputs, attrs
var istest, isbench
var fsel
match word(p)
| `std.Some n: name = n
| `std.None: failparse(p, "expected target name after '{}'\n", targ)
;;
match attrlist(p)
| `std.Some al: attrs = al
| `std.None: failparse(p, "invalid attr list for {} {}\n", targ, name)
;;
skipspace(p)
if !matchc(p, '=')
failparse(p, "expected '=' after '{} {}'\n", targ, name)
;;
fsel = mksyssel(b, p.fname, p.line, name)
match inputlist(p)
| `std.Some (wl, libs):
libdeps = libs
for w : wl
sysseladd(fsel, w)
;;
inputs = sysselfin(fsel)
std.slfree(wl)
| `std.None: failparse(p, "expected list of file names after '{} {}'\n", targ, name)
;;
skipspace(p)
if !matchc(p, ';') || !matchc(p, ';')
failparse(p, "expected ';;' terminating input list, got {}\n", peekc(p))
;;
install = true
ldscript = ""
runtime = ""
incpath = [][:]
tags = [][:]
istest = false
isbench = false
for elt : attrs
match elt
| ("ldscript", lds): ldscript = std.sldup(lds)
| ("runtime", rt): runtime = std.sldup(rt)
| ("inc", path): std.slpush(&incpath, std.sldup(path))
| ("tag", tag): std.slpush(&tags, tag)
| ("inst", ""): install = true
| ("noinst", ""): install = false
| ("test", ""): istest = true
| ("bench", ""): isbench = true
| ("notest", ""): istest = false
| (invalid, ""): std.fatal("{}: invalid attr '{}'\n", targ, invalid)
| (invalid, attr): std.fatal("{}: invalid attr '{} = {}'\n", targ, invalid, attr)
;;
;;
std.sljoin(&incpath, bld.opt_incpaths)
-> std.mk([
/* target */
.dir=std.sldup(p.fdir),
.name=name,
.inputs=inputs,
.libdeps=libdeps,
.islib=false,
.istest=istest,
.isbench=isbench,
.isdyn=false,
/* attrs */
.tags=tags,
.install=install,
.ldscript=ldscript,
.runtime=runtime,
.incpath=incpath,
])
}
const datatarget = {b, p, targ
var name, attrs, blobs
var tags, path
match word(p)
| `std.Some n: name = n
| `std.None: failparse(p, "expected target name after '{}'\n", targ)
;;
skipspace(p)
attrs = [][:]
match attrlist(p)
| `std.Some al: attrs = al
| `std.None: failparse(p, "invalid attr list for {} {}\n", targ, name)
;;
skipspace(p)
if !matchc(p, '=')
failparse(p, "expected '=' after '{} {}'\n", targ, name)
;;
match wordlist(p)
| `std.Some wl: blobs = wl
| `std.None: failparse(p, "expected file list after '{} {}'\n", targ, name)
;;
skipspace(p)
if !matchc(p, ';') || !matchc(p, ';')
failparse(p, "expected ';;' after input list, got {}\n", peekc(p))
;;
tags = [][:]
for elt : attrs
match elt
| ("tag", tag): std.slpush(&tags, tag)
| ("path", pathdir): path = pathdir
| (tag, ""):
std.fatal("{}: invalid attr '{}'\n", targ, tag)
| (tag, attr):
std.fatal("{}: invalid attr '{}={}'\n", targ, tag, attr)
;;
;;
addtarg(p, b, name, tags, `Data std.mk([
.dir=std.sldup(p.fdir),
.name=name,
.tags=tags,
.path=path,
.blobs=blobs,
]))
}
/* anontarget: '=' wordlist ';;' */
const anontarget = {p, targ
var inputs
inputs = [][:]
skipspace(p)
if !matchc(p, '=')
failparse(p, "expected '=' after '{}' target\n", targ)
;;
match wordlist(p)
| `std.Some wl: inputs = wl
| `std.None: failparse(p, "expected file list after '{}' target\n", targ)
;;
skipspace(p)
if !matchc(p, ';') || !matchc(p, ';')
failparse(p, "expected ';;' terminating input list\n")
;;
-> inputs
}
/*
attrlist: EMPTY |'{' attrs '}'
attrs : EMPTY
| attrs attr
attr : name
| name '=' name
*/
const attrlist = {p
var al
al = [][:]
skipspace(p)
if !matchc(p, '{')
-> `std.Some al
;;
while true
match word(p)
| `std.Some k:
if matchc(p, '=')
match word(p)
| `std.Some v:
std.slpush(&al, (k, v))
| `std.None:
failparse(p, "invalid attr in attribute list\n")
;;
else
std.slpush(&al, (k, [][:]))
;;
if !matchc(p, ',')
break
;;
| `std.None: break
;;
;;
if !matchc(p, '}')
failparse(p, "expected '}' at end of attr list, got '{}'\n", peekc(p))
;;
if al.len == 0
-> `std.None
else
-> `std.Some al
;;
}
/*
inputlist: EMPTY
| inputlist input
input : word
| "lib" word
*/
const inputlist = {p
var dir, lib, targ
var wl, libs
wl = [][:]
libs = [][:]
while true
match word(p)
| `std.Some "lib":
match word(p)
| `std.Some l:
(dir, lib, targ) = libpath(p, l)
std.slpush(&libs, (dir, lib, targ))
| `std.None:
failparse(p, "expected lib name after 'lib'\n")
;;
| `std.Some w: std.slpush(&wl, w)
| `std.None: break
;;
;;
if wl.len == 0
-> `std.None
else
-> `std.Some (wl, libs)
;;
}
/* wordlist: EMPTY | wordlist word */
const wordlist = {p
var wl
wl = [][:]
while true
match word(p)
| `std.Some w: std.slpush(&wl, w)
| `std.None: break
;;
;;
if wl.len == 0
-> `std.None
else
-> `std.Some wl
;;
}
/* word: /wordchar*/
/* word: /wordchar*/
const word = {p
var c, n
var start
skipspace(p)
c = peekc(p)
if c == '"'
n = 0
getc(p)
start = p.rest
while p.rest.len > 0
c = peekc(p)
if c == '"'
getc(p)
goto done
elif c == '\\'
c = getc(p)
;;
getc(p)
n += std.charlen(c)
;;
failparse(p, "input ended within quoted word\n")
else
n = 0
start = p.rest
while p.rest.len > 0
c = peekc(p)
if wordchar(c)
getc(p)
n += std.charlen(c)
else
break
;;
;;
;;
:done
if n > 0
-> `std.Some std.sldup(start[:n])
else
-> `std.None
;;
}
const wordchar = {c
-> std.isalnum(c) || \
c == '.' || c == '_' || c == '$' || c == '-' || \
c == '/' || c == '@' || c == '!' || c == '~' || \
c == '+' || c == '%' || c == '&' || c == '(' || \
c == ')' || c == '[' || c == ']' || c == ':'
}
const skipspace = {p
var c, r
r = p.rest
while r.len > 0
c = peekc(p)
match c
| ' ': getc(p)
| '\t': getc(p)
| '\n':
getc(p)
p.line++
| '#':
while p.rest.len > 0 && peekc(p) != '\n'
getc(p)
;;
| _:
break
;;
;;
}
const matchc = {p, c
var chr, s
/* safe to use at eof: charstep returns (-1, "") */
(chr, s) = std.charstep(p.rest)
if c == chr
p.rest = s
-> true
else
-> false
;;
}
const peekc = {p
-> std.decode(p.rest)
}
const getc = {p
var c, s
(c, s) = std.charstep(p.rest)
p.rest = s
-> c
}
const addtarg = {p, b, name, tags, targ
var tn
tn = std.fmt("{}:{}", p.fdir, name)
sysseladdlist(p.targsel, tn, tags, (tn, targ))
std.slpush(&p.targs, targ)
}
const libpath = {p, libpath
var dir, lib, targ
match std.strrfind(libpath, ":")
| `std.None:
dir = std.sldup(p.fdir)
lib = std.sldup(libpath)
targ = std.fmt("{}:{}", p.fdir, lib)
| `std.Some idx:
if idx == libpath.len
std.fatal("libdep {} missing library after ':'\n")
;;
/* absolute path */
if std.hasprefix(libpath, "@/") || std.hasprefix(libpath, "@:")
dir = std.sldup(libpath[2:idx])
lib = std.sldup(libpath[idx+1:])
targ = std.sldup(libpath[2:])
/* relative path */
else
dir = std.pathcat(p.fdir, libpath[:idx])
lib = std.sldup(libpath[idx+1:])
targ = std.pathcat(p.fdir, libpath)
if std.hasprefix(targ, "../")
std.fatal("library {} outside of project\n", libpath)
;;
;;
;;
-> (dir, lib, targ)
}
$noret const failparse = {p, msg, args : ...
var buf : byte[1024]
var ap
var sl
ap = std.vastart(&args)
sl = std.bfmtv(buf[:], msg, &ap)
std.fput(1, "{}:{}: {}", p.fname, p.line, sl)
std.exit(1)
}