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--- Package processing routines
-- @module bliss.pkg
local utils = require "bliss.utils"
local tsort = require "bliss.tsort"
local glob = require "posix.glob"
local sys_stat = require "posix.sys.stat"
--- return an array of arrays of split lines
local function read_lines(file)
local t = {}
local f = io.open(file)
if not f then return {} end
for line in f:lines() do
if #line ~= 0 and string.sub(line, 1, 1) ~= "#" then
table.insert(t, utils.split(line, " "))
end
end
f:close()
return t
end
local function find(name, path)
for _, repo in ipairs(path) do
local g = repo .. "/" .. name
local sb = sys_stat.stat(g)
if sb and sys_stat.S_ISDIR(sb.st_mode) ~= 0 then
return g
end
end
utils.die("'"..name.."' not found")
end
local function isinstalled(env, name)
local sb = sys_stat.stat(env.sys_db .. "/" .. name)
return not not sb
end
local function iscached(env, pkg, version)
local f = env.bin_dir .. "/" .. pkg .. "@" .. version[1] .. "-" .. version[2] .. ".tar."
local myglob = f .. "*"
local f = f .. env.COMPRESS
local sb = sys_stat.stat(f)
if sb then
return f
else
local g = glob.glob(myglob, 0)
return g and g[1] or false
end
end
local function find_version(pkg, repo_dir)
local v = repo_dir .. "/version"
local ver = read_lines(v)
if #ver == 0 then utils.die(pkg, "error reading version") end
return ver[1]
end
local function find_checksums(pkg, repo_dir)
local p = repo_dir .. "/checksums"
return read_lines(p)
end
local function find_depends(pkg, repo_dir)
local p = repo_dir .. "/depends"
return read_lines(p)
end
local function find_sources(pkg, repo_dir)
utils.log(pkg, "Reading sources")
local p = repo_dir .. "/sources"
local s = read_lines(p)
if #s == 0 then utils.log(pkg, "no sources found") end
return s
end
local function resolve_git(pkg, source, env)
local fp = string.match(source[1], "/([^/]+)$")
if not fp then utils.die(pkg, "can't parse source '"..source[1].."'") end
fp = string.match(fp, "(.-)[@#]") or fp -- NB: kiss does the longest match (.*) instead.
return env.src_dir .. "/" .. pkg .. "/" .. (source[2] and source[2] .. "/" or "") .. fp .. "/"
end
local function resolve_http(pkg, source, env)
-- get file part of URL
local fp = string.match(source[1], "/([^/]+)$")
if not fp then utils.die(pkg, "can't parse source '" .. source[1] .. "'") end
return env.src_dir .. "/" .. pkg .. "/" .. (source[2] and source[2] .. "/" or "") .. fp
end
local function resolve_file(pkg, source, env, repo_dir)
local f = repo_dir .. "/" .. source[1]
if not sys_stat.stat(f) then utils.die(pkg, "source '"..source[1].."' not found") end
return f
end
-- returns an array of the cache locations corresponding to each source
local function resolve(pkg, sources, env, repo_dir)
local map = {
["git+"] = resolve_git,
["http"] = resolve_http,
}
local caches = {}
for _, v in ipairs(sources) do
local f = map[v[1]:sub(1, 4)] or resolve_file
local c = f(pkg, v, env, repo_dir)
if c then table.insert(caches, c) end
end
return caches
end
local function recurse_all_deps(env, pkgs, deps)
for _, p in ipairs(pkgs) do
if not deps[p] then
local d = find_depends(p, find(p, env.PATH))
-- ignore make, just get pkg names
local d_ = {}
for _,v in ipairs(d) do
table.insert(d_, v[1])
end
-- recurse
deps = recurse_all_deps(env, d_, deps)
deps[p] = d_
end
end
return deps
end
local function order(env, pkgs)
-- use tsort(1) instead?
local t = tsort.new()
local deps = recurse_all_deps(env, pkgs, {})
for k,v in pairs(deps) do
t:add(k, v)
end
local s, x,y = t:sort()
if not s then
utils.die("Circular dependency detected: " .. x .. " <> " .. y)
end
-- return s reversed (in order to be built)
local r = {}
for i = #s, 1, -1 do
table.insert(r, s[i])
end
return r
end
--- @export
local M = {
read_lines = read_lines,
find = find,
isinstalled = isinstalled,
iscached = iscached,
find_version = find_version,
find_checksums = find_checksums,
find_depends = find_depends,
find_sources = find_sources,
resolve = resolve,
order = order,
}
return M
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