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author | Jakub Jirutka <jakub@jirutka.cz> | 2017-06-22 02:10:37 +0200 |
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committer | Jakub Jirutka <jakub@jirutka.cz> | 2017-06-22 02:10:37 +0200 |
commit | d2421dd4f69d5a006fec9bb09ec306eedca9e0f3 (patch) | |
tree | 373e149573962c160493c51231fb13fc393cd232 /aports | |
parent | 22c6f7d4571e02b7ec8777389823d7ca605961c7 (diff) | |
download | lua-aports-d2421dd4f69d5a006fec9bb09ec306eedca9e0f3.tar.bz2 lua-aports-d2421dd4f69d5a006fec9bb09ec306eedca9e0f3.tar.xz |
ap: add subcommand dump-json
Diffstat (limited to 'aports')
-rw-r--r-- | aports/dump.lua | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/aports/dump.lua b/aports/dump.lua new file mode 100644 index 0000000..a78b63e --- /dev/null +++ b/aports/dump.lua @@ -0,0 +1,77 @@ +--------- +-- Dump packages info into JSON. +---- +local cjson = require('cjson') +local pkgmod = require('aports.pkg') + +local get_maintainer = pkgmod.get_maintainer +local push = table.insert + + +-- Tables with this metatable are encoded as an array by our patched cjson. +local empty_array_mt = { __name = 'array' } + +local empty_array = setmetatable({}, empty_array_mt) + +--- Converts pkg's `arch` map into list of architectures. +-- Negated architecture is prefixed by "!". +-- +-- @tparam {[string]=bool,...} arch +-- @treturn {string,...} +local function convert_arch(arch) + local t = {} + for name, value in pairs(arch) do + push(t, value and name or '!'..name) + end + return t +end + +--- "Marks" the given table to be encoded as a JSON array. +local function array(tab) + return #tab == 0 + and empty_array + or setmetatable(tab, empty_array_mt) +end + +--- Converts the `pkg` into a simple table (map) that can be serialized. +-- +-- @tparam table pkg The package table (see @{db.split_apkbuild}). +-- @treturn table A simple map of values. +local function pkg_to_table(pkg) + return { + pkgname = pkg.pkgname, + pkgver = pkg.pkgver, + pkgrel = tonumber(pkg.pkgrel), + pkgdesc = pkg.pkgdesc, + url = pkg.url, + license = pkg.license, + arch = array(convert_arch(pkg.arch)), + depends = array(pkg.depends), + makedepends = array(pkg.makedepends), + checkdepends = array(pkg.checkdepends), + subpackages = array(pkg.subpackages), + source = array(pkg.source), + maintainer = get_maintainer(pkg), + } +end + + +local M = {} + +--- Dumps packages from the given iterator to a map indexed by package name. +function M.pkgs_to_map(iter, state) + local t = {} + for pkg in iter, state do + t[pkg.pkgname] = pkg_to_table(pkg) + end + return t +end + +--- Dumps packages from the given iterator to JSON. +-- @see pkgs_to_map +function M.pkgs_to_json(iter, state) + cjson.encode_sort_keys = true + return cjson.encode(M.pkgs_to_map(iter, state)) +end + +return M |