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ninja.lua
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ninja.lua
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--
-- utility functions
--
function string.hasprefix(s, prefix)
return s:sub(1, #prefix) == prefix
end
function string.hassuffix(s, suffix)
return s:sub(-#suffix) == suffix
end
-- collects the results of an iterator into a table
local function collect(f, s, i)
local t = {}
for v in f, s, i do
t[#t + 1] = v
end
return t
end
-- collects the keys of a table into a sorted table
function table.keys(t, f)
local keys = collect(next, t)
table.sort(keys, f)
return keys
end
-- iterates over the sorted keys and values of a table
function sortedpairs(t, f)
return function(s, i)
local k = s[i]
return k and i + 1, k, t[k]
end, table.keys(t, f), 1
end
-- yields string values of table or nested tables
local function stringsgen(t)
for _, val in ipairs(t) do
if type(val) == 'string' then
coroutine.yield(val)
else
stringsgen(val)
end
end
end
function iterstrings(x)
return coroutine.wrap(stringsgen), x
end
function strings(s)
return collect(iterstrings(s))
end
-- yields strings generated by concateting all strings in a table, for every
-- combination of strings in subtables
local function expandgen(t, i)
while true do
local val
i, val = next(t, i)
if not i then
coroutine.yield(table.concat(t))
break
elseif type(val) == 'table' then
for opt in iterstrings(val) do
t[i] = opt
expandgen(t, i)
end
t[i] = val
break
end
end
end
function expand(t)
return collect(coroutine.wrap(expandgen), t)
end
-- yields expanded paths from the given path specification string
local function pathsgen(s, i)
local results = {}
local first = not i
while true do
i = s:find('[^%s]', i)
local _, j, arch = s:find('^@([^%s()]*)%s*[^%s]?', i)
if arch then i = j end
if not i or s:sub(i, i) == ')' then
break
end
local parts, nparts = {}, 0
local c
while true do
local j = s:find('[%s()]', i)
if not j or j > i then
nparts = nparts + 1
parts[nparts] = s:sub(i, j and j - 1)
end
i = j
c = i and s:sub(i, i)
if c == '(' then
local opts, nopts = {}, 0
local fn = coroutine.wrap(pathsgen)
local opt
opt, i = fn(s, i + 1)
while opt do
nopts = nopts + 1
opts[nopts] = opt
opt, i = fn(s)
end
nparts = nparts + 1
parts[nparts] = opts
if not i or s:sub(i, i) ~= ')' then
error('unmatched (')
end
i = i + 1
c = s:sub(i, i)
else
break
end
end
if not arch or arch == config.target.platform:match('[^-]*') then
expandgen(parts)
end
if not c or c == ')' then
break
end
end
if first and i then
error('unmatched )')
end
return nil, i
end
function iterpaths(s)
return coroutine.wrap(pathsgen), s
end
function paths(s)
return collect(iterpaths(s))
end
-- yields non-empty non-comment lines in a file
local function linesgen(file)
for line in io.lines(file) do
if #line > 0 and not line:hasprefix('#') then
coroutine.yield(line)
end
end
end
function iterlines(file, raw)
table.insert(pkg.inputs.gen, '$dir/'..file)
file = string.format('%s/%s/%s', basedir, pkg.gendir, file)
if raw then
return io.lines(file)
end
return coroutine.wrap(linesgen), file
end
function lines(file, raw)
return collect(iterlines(file, raw))
end
function load(file)
table.insert(pkg.inputs.gen, '$dir/'..file)
return dofile(string.format('%s/%s/%s', basedir, pkg.gendir, file))
end
--
-- base constructs
--
function set(var, val, indent)
if type(val) == 'table' then
val = table.concat(val, ' ')
end
io.write(string.format('%s%s = %s\n', indent or '', var, val))
end
function subninja(file)
if not file:match('^[$/]') then
file = '$gendir/'..file
end
io.write(string.format('subninja %s\n', file))
end
function include(file)
io.write(string.format('include %s\n', file))
end
local function let(bindings)
for var, val in pairs(bindings) do
set(var, val, ' ')
end
end
function rule(name, cmd, bindings)
io.write(string.format('rule %s\n command = %s\n', name, cmd))
if bindings then
let(bindings)
end
end
function build(rule, outputs, inputs, bindings)
if type(outputs) == 'table' then
outputs = table.concat(strings(outputs), ' ')
end
if not inputs then
inputs = ''
elseif type(inputs) == 'table' then
local srcs, nsrcs = {}, 0
for src in iterstrings(inputs) do
nsrcs = nsrcs + 1
srcs[nsrcs] = src
if src:hasprefix('$srcdir/') then
pkg.inputs.fetch[src] = true
end
end
inputs = table.concat(srcs, ' ')
elseif inputs:hasprefix('$srcdir/') then
pkg.inputs.fetch[inputs] = true
end
io.write(string.format('build %s: %s %s\n', outputs, rule, inputs))
if bindings then
let(bindings)
end
end
--
-- higher-level rules
--
function sub(name, fn)
local old = io.output()
io.output(pkg.gendir..'/'..name)
fn()
io.output(old)
subninja(name)
end
function toolchain(tc)
set('ar', tc.ar or (tc.platform and tc.platform..'-ar') or 'ar')
set('as', tc.as or (tc.platform and tc.platform..'-as') or 'as')
set('cc', tc.cc or (tc.platform and tc.platform..'-cc') or 'cc')
set('ld', tc.ld or (tc.platform and tc.platform..'-ld') or 'ld')
set('objcopy', tc.objcopy or (tc.platform and tc.platform..'-objcopy') or 'objcopy')
set('mc', tc.mc or 'false')
set('cflags', tc.cflags)
set('ldflags', tc.ldflags)
end
function phony(name, inputs)
build('phony', '$gendir/'..name, inputs)
end
function cflags(flags)
set('cflags', '$cflags '..table.concat(flags, ' '))
end
function nasmflags(flags)
set('nasmflags', '$nasmflags '..table.concat(flags, ' '))
end
function compile(rule, src, deps, args)
local obj = src..'.o'
if not src:match('^[$/]') then
src = '$srcdir/'..src
obj = '$outdir/'..obj
end
if not deps and pkg.deps then
deps = '$gendir/deps'
end
if deps then
src = {src, '||', deps}
end
build(rule, obj, src, args)
return obj
end
function cc(src, deps, args)
return compile('cc', src, deps, args)
end
function objects(srcs, deps, args)
local objs, nobjs = {}, 0
local rules = {
c='cc',
s='cc',
S='cc',
cc='cc',
cpp='cc',
asm='nasm',
}
local fn
if type(srcs) == 'string' then
fn = coroutine.wrap(pathsgen)
else
fn = coroutine.wrap(stringsgen)
end
for src in fn, srcs do
local rule = rules[src:match('[^.]*$')]
if rule then
src = compile(rule, src, deps, args)
end
nobjs = nobjs + 1
objs[nobjs] = src
end
return objs
end
function link(out, files, args)
local objs = {}
local deps = {}
for _, file in ipairs(files) do
if not file:match('^[$/]') then
file = '$outdir/'..file
end
if file:hassuffix('.d') then
deps[#deps + 1] = file
else
objs[#objs + 1] = file
end
end
out = '$outdir/'..out
if not args then
args = {}
end
if next(deps) then
local rsp = out..'.rsp'
build('awk', rsp, {deps, '|', '$basedir/scripts/rsp.awk'}, {expr='-f $basedir/scripts/rsp.awk'})
objs[#objs + 1] = '|'
objs[#objs + 1] = rsp
args.ldlibs = '@'..rsp
end
build('link', out, objs, args)
return out
end
function ar(out, files)
out = '$outdir/'..out
local objs, nobjs = {}, 0
local deps, ndeps = {out}, 1
for _, file in ipairs(files) do
if not file:match('^[$/]') then
file = '$outdir/'..file
end
if file:find('%.[ad]$') then
ndeps = ndeps + 1
deps[ndeps] = file
else
nobjs = nobjs + 1
objs[nobjs] = file
end
end
build('ar', out, objs)
build('rsp', out..'.d', deps)
end
function lib(out, srcs, deps)
return ar(out, objects(srcs, deps))
end
function exe(out, srcs, deps, args)
return link(out, objects(srcs, deps), args)
end
function yacc(name, gram)
if not gram:match('^[$/]') then
gram = '$srcdir/'..gram
end
build('yacc', expand{'$outdir/', name, {'.tab.c', '.tab.h'}}, gram, {
yaccflags='-d -b $outdir/'..name,
})
end
function waylandproto(proto, outs, args)
proto = '$srcdir/'..proto
if outs.client then
build('wayland-proto', '$outdir/'..outs.client, proto, {type='client-header'})
end
if outs.server then
build('wayland-proto', '$outdir/'..outs.server, proto, {type='server-header'})
end
if outs.code then
local code = '$outdir/'..outs.code
build('wayland-proto', code, proto, {type='public-code'})
cc(code, {'pkg/wayland/headers'}, args)
end
end
function fetch(method)
local script
if method == 'local' then
script = '$dir/fetch.sh'
else
script = '$basedir/scripts/fetch-'..method..'.sh'
end
build('fetch', '$dir/fetch', {'|', '$dir/ver', script}, {script=script})
if basedir ~= '.' then
build('phony', '$gendir/fetch', '$dir/fetch')
end
if next(pkg.inputs.fetch) then
build('phony', table.keys(pkg.inputs.fetch), '$dir/fetch')
end
end
local function findany(path, pats)
for _, pat in pairs(pats) do
if path:find(pat) then
return true
end
end
return false
end
local function specmatch(spec, path)
if spec.include and not findany(path, spec.include) then
return false
end
if spec.exclude and findany(path, spec.exclude) then
return false
end
return true
end
local function fs(name, path)
for _, spec in ipairs(config.fs) do
for specname in iterstrings(spec) do
if name == specname then
return specmatch(spec, path)
end
end
end
return (config.fs.include or config.fs.exclude) and specmatch(config.fs, path)
end
function gitfile(path, mode, src)
local out = '$builddir/root.hash/'..path
local perm = ('10%04o %s'):format(tonumber(mode, 8), path)
build('git-hash', out, {src, '|', '$basedir/scripts/hash.sh', '||', '$builddir/root.stamp'}, {
args=perm,
})
table.insert(pkg.inputs.index, out)
end
function file(path, mode, src)
if pkg.gendir:hasprefix('pkg/') and not fs(pkg.name, path) then
return
end
mode = ('%04o'):format(tonumber(mode, 8))
pkg.fspec[path] = {
type='reg',
mode=mode,
source=src:gsub('^%$(%w+)', pkg, 1),
}
gitfile(path, mode, src)
end
function dir(path, mode)
if pkg.gendir:hasprefix('pkg/') and not fs(pkg.name, path) then
return
end
pkg.fspec[path] = {
type='dir',
mode=('%04o'):format(tonumber(mode, 8)),
}
end
function sym(path, target)
if pkg.gendir:hasprefix('pkg/') and not fs(pkg.name, path) then
return
end
pkg.fspec[path] = {
type='sym',
mode='0777',
target=target,
}
local out = '$builddir/root.hash/'..path
build('git-hash', out, {'|', '$basedir/scripts/hash.sh', '||', '$builddir/root.stamp'}, {
args=string.format('120000 %s %s', path, target),
})
table.insert(pkg.inputs.index, out)
end
function man(srcs, section)
for _, src in ipairs(srcs) do
if not src:match('^[$/]') then
src = '$srcdir/'..src
end
local i = src:find('/', 1, true)
local gz = '$outdir'..src:sub(i)..'.gz'
build('gzip', gz, src)
local srcsection = section or src:match('[^.]*$')
file('share/man/man'..srcsection..'/'..gz:match('[^/]*$'), '644', gz)
end
end
function copy(outdir, srcdir, files)
local outs = {}
for i, file in ipairs(files) do
local out = outdir..'/'..file
outs[i] = out
build('copy', out, srcdir..'/'..file)
end
return outs
end