ref: d7340a02cef50b6f3ae1344b71a6f78922002652
dir: /mbld/deps.myr/
use std
use regex
use bio
use "config.use"
use "opts.use"
use "types.use"
use "util.use"
pkg bld =
const myrdeps : (b : build#, mt : myrtarg#, doclean : bool, addsrc : bool -> depgraph#)
/* a bit ugly: initialized from main() */
var usepat : regex.regex#
;;
const Abiversion = 5
var usepat : regex.regex#
type dep = union
`Local (byte[:], int)
`Lib (byte[:], int)
;;
type depscan = struct
doclean : bool
addsrc : bool
tagsel : std.htab(byte[:], byte[:])#
targ : myrtarg#
incs : byte[:][:]
depstk : byte[:][:]
;;
const myrdeps = {b, mt, doclean, addsrc
var objs, uses, srcs
var out, useout
var dg : depgraph#
var ds : depscan
var i
dg = std.mk([
.deps = std.mkht(std.strhash, std.streq),
.libs = std.mkht(std.strhash, std.streq),
.input = std.mkht(std.strhash, std.streq),
.sources = std.mkht(std.strhash, std.streq),
.updated = std.mkht(std.strhash, std.streq),
.seen = std.mkht(std.strhash, std.streq),
.done = std.mkht(std.strhash, std.streq),
])
/* direct dependencies of binary */
if mt.islib
out = std.fmt("lib{}.a", mt.name)
useout = std.sldup(mt.name)
else
out = std.sldup(mt.name)
useout = ""
;;
ds = [
.doclean = doclean,
.addsrc = addsrc,
.incs = mt.incpath,
.targ = mt,
.depstk = [][:],
]
srcs = mt.inputs
objs = swapall(srcs, config.Objsuffix)
uses = swapall(srcs, ".use")
for i = 0; i < srcs.len; i++
std.htput(dg.input, objs[i], srcs[i])
std.htput(dg.sources, srcs[i], true)
pushdep(dg, srcs[i], objs[i])
if std.hassuffix(srcs[i], ".myr")
std.htput(dg.input, uses[i], srcs[i])
pushdep(dg, srcs[i], uses[i])
;;
;;
for i = 0; i < srcs.len; i++
pushdep(dg, objs[i], out)
if mt.islib && std.hassuffix(srcs[i], ".myr")
pushdep(dg, uses[i], useout)
;;
;;
for i = 0; i < srcs.len; i++
srcdeps(b, &ds, dg, srcs[i], objs[i], uses[i])
;;
dumpgraph(dg)
-> dg
}
const swapall = {srcs, suff
var sl
sl = [][:]
for s in srcs
sl = std.slpush(sl, srcswapsuffix(s, suff))
;;
-> sl
}
const dumpgraph = {dg
var keys
if !opt_debug
->
;;
keys = std.htkeys(dg.deps)
std.put("digraph dg {{\n")
for k in keys
for v in std.htgetv(dg.deps, k, ["WTFUNKNOWN!"][:])
std.put("\t\"{}\" -> \"{}\";\n", k, v)
;;
;;
std.put("}\n")
}
const srcdeps = {b, ds, g, path, obj, usefile
var deps
if std.hthas(g.done, path)
->
;;
ds.depstk = std.slpush(ds.depstk, path)
if std.htgetv(g.seen, path, false)
std.fput(1, "dependency loop involving {}:\n", path)
for d in ds.depstk
std.fput(1, "\t{}\n", d)
;;
std.exit(1)
;;
deps = getdeps(b, ds, path)
std.htput(g.seen, path, true)
for d in deps
match d
| `Lib (lib, lnum):
/*
If we're cleaning, we don't care about libraries; at best, this does nothing. At
worst, this will cause failure if the library is a local library that gets cleand.
*/
if !ds.doclean
scrapelibs(g, lib, ds.incs)
;;
| `Local (l, lnum):
if !std.hassuffix(l, ".use")
std.fatal("{}:{}: local dependency \"{}\" should end with .use\n", path, lnum, l)
;;
if obj.len != 0
pushdep(g, l, obj)
;;
if usefile.len != 0
pushdep(g, l, usefile)
;;
addusedep(b, ds, g, path, l, lnum)
;;
;;
ds.depstk = std.slgrow(ds.depstk, ds.depstk.len - 1)
std.htput(g.seen, path, false)
std.htput(g.done, path, true)
}
const addusedep = {b, ds, g, f, usefile, line
var src
if std.hthas(g.done, usefile)
if opt_debug
std.put("already loaded deps for {}\n", usefile)
;;
->
;;
match std.htget(g.input, usefile)
| `std.Some path:
src = std.sldup(path)
| `std.None:
src = swapsuffix(usefile, ".use", ".myr")
if ds.addsrc
std.htput(g.sources, src, true)
elif !std.hthas(g.input, usefile)
std.fatal("{}:{}: source file {} not listed in bldfile\n", f, line, src)
;;
;;
pushdep(g, src, usefile)
std.htput(g.input, usefile, src)
srcdeps(b, ds, g, src, "", usefile)
std.htput(g.done, usefile, true)
}
const getdeps = {b, ds, path
var deps, lnum
var f
deps = [][:]
if !std.fexists(path)
match std.htget(b.gensrc, path)
| `std.Some gt: run(gt.cmd)
| `std.None: std.fatal("no input file {}\n", path)
;;
;;
match bio.open(path, bio.Rd)
| `std.Ok fd: f = fd
| `std.Fail m: std.fatal("could not open {}: {}\n", path, m)
;;
lnum = 0
while true
lnum++
match bio.readln(f)
| `std.Some ln:
deps = depname(deps, ln, lnum)
std.slfree(ln)
| `std.None:
bio.close(f)
-> deps
;;
;;
std.die("unreachable")
}
const scrapelibs = {dg, lib, incs
var deps, d
var f
var done
if std.hthas(dg.libs, lib)
->
;;
deps = [][:]
f = openlib(lib, incs)
match bio.getc(f)
| `std.Some 'U': /* nothing */
| `std.Some _: std.fatal("library {}: corrupt or invalid usefile\n", lib)
| `std.None: std.fatal("library {}: could not read usefile\n", lib)
;;
match bio.getbe32(f)
| `std.Some Abiversion: /* nothing: version matches. */
| `std.Some v:
if v < Abiversion
std.fput(1, "library {}: warning: old abi version\n", lib)
else
std.fatal("library {}: usefile version unknown\n", lib)
;;
| `std.None: std.fatal("library {}: corrutpt or invalid usefile\n", lib)
;;
std.slfree(rdstr(f))
done = false
while !done
match bio.getc(f)
| `std.Some 'L':
d = rdstr(f)
deps = std.slpush(deps, d)
| `std.Some _: done = true
| `std.None: done = true
;;
;;
bio.close(f)
std.htput(dg.libs, lib, deps)
for dep in deps
scrapelibs(dg, dep, incs)
;;
}
const openlib = {lib, incs
var path
for p in incs
path = std.pathjoin([p, lib][:])
match bio.open(path, bio.Rd)
| `std.Ok file: -> file
| `std.Fail m: /* nothing */
;;
;;
path = std.pathjoin([opt_instroot, config.Libpath, lib][:])
match bio.open(path, bio.Rd)
| `std.Ok file: -> file
| `std.Fail m: /* nothing */
;;
std.fatal("could not find library {}.\n", lib)
}
const depname = {deps, ln, lnum
/*
the regex pattern does some contortions to either grab
an unquoted path and put it into uses[4], or a quoted
path, and put it (minus the quotes) into uses[2]
*/
match regex.exec(usepat, ln)
| `std.Some uses:
if uses[2].len > 0
deps = std.slpush(deps, `Lib (std.sldup(uses[2]), lnum))
else
deps = std.slpush(deps, `Local (std.sldup(uses[3]), lnum))
;;
| `std.None:
/* nothing to do */
;;
-> deps
}
/* pushes a dep into the dependency list */
const pushdep = {dg, src, dst
var sl
if opt_debug
std.put("{} <= {}\n", dst, src)
;;
std.assert(dst.len < 200, "BUG!")
sl = std.htgetv(dg.deps, dst, [][:])
sl = std.slpush(sl, src)
std.htput(dg.deps, dst, sl)
}
const rdstr = {f
var len
var sl
match bio.getbe32(f)
| `std.Some l:
len = l
sl = std.slalloc(len)
| `std.None: std.die("string length not readable")
;;
bio.read(f, sl)
-> sl
}