diff options
| -rw-r--r-- | .envrc | 1 | ||||
| -rw-r--r-- | .gitignore | 1 | ||||
| -rw-r--r-- | flake.lock | 27 | ||||
| -rw-r--r-- | flake.nix | 37 | ||||
| -rw-r--r-- | src/arg.lua | 126 | ||||
| -rwxr-xr-x | src/blueprint | 16 |
6 files changed, 208 insertions, 0 deletions
@@ -0,0 +1 @@ +use flake diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..9b42106 --- /dev/null +++ b/.gitignore @@ -0,0 +1 @@ +.direnv/ diff --git a/flake.lock b/flake.lock new file mode 100644 index 0000000..2130399 --- /dev/null +++ b/flake.lock @@ -0,0 +1,27 @@ +{ + "nodes": { + "nixpkgs": { + "locked": { + "lastModified": 1776169885, + "narHash": "sha256-l/iNYDZ4bGOAFQY2q8y5OAfBBtrDAaPuRQqWaFHVRXM=", + "owner": "nixos", + "repo": "nixpkgs", + "rev": "4bd9165a9165d7b5e33ae57f3eecbcb28fb231c9", + "type": "github" + }, + "original": { + "owner": "nixos", + "ref": "nixos-unstable", + "repo": "nixpkgs", + "type": "github" + } + }, + "root": { + "inputs": { + "nixpkgs": "nixpkgs" + } + } + }, + "root": "root", + "version": 7 +} diff --git a/flake.nix b/flake.nix new file mode 100644 index 0000000..bc3b622 --- /dev/null +++ b/flake.nix @@ -0,0 +1,37 @@ +{ + description = "A very basic flake"; + + inputs = { + nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable"; + }; + + outputs = { self, nixpkgs }: + let + pkgs = import nixpkgs { system = "x86_64-linux"; }; + luap = pkgs.lua54Packages; + inputs = [ + luap.lua + luap.inspect + ]; + in + { + + packages.x86_64-linux.blueprint = pkgs.stdenv.mkDerivation { + name = "blueprint"; + src = self; + + installPhase = '' + mkdir -p $out/bin; + install ./src/** $out/bin + ''; + + buildInputs = inputs; + }; + + packages.x86_64-linux.default = self.packages.x86_64-linux.blueprint; + + devShells.x86_64-linux.default = pkgs.mkShell { + packages = inputs; + }; + }; +} diff --git a/src/arg.lua b/src/arg.lua new file mode 100644 index 0000000..a0acd9c --- /dev/null +++ b/src/arg.lua @@ -0,0 +1,126 @@ + +local function help(opts) + + io.write(arg[0]) + io.write(" ") + + for _, v in ipairs(opts) do + if v.kind == nil then + io.write("[" .. v.name .. "] ") + end + end + io.write("\n") + + local max_width = 0 + + for _, v in ipairs(opts) do + if v.kind ~= nil then + max_width = math.max(v.name:len(), max_width) + end + end + + for _, v in ipairs(opts) do + if v.kind == nil then + goto next + end + + if v.kind == 'property' then + io.write("\t" .. "--" .. v.name .. " <value>") + elseif v.kind == 'flag' then + io.write("\t" .. "--" .. v.name .. " ") + end + + if v.description ~= nil then + io.write(string.rep(" ", max_width - v.name:len()) .. " " .. "-- ") + + if v.required then + io.write("(required) ") + end + + io.write(v.description) + end + + io.write("\n") + + ::next:: + end + + os.exit() +end + +function string:flag() + if self:sub(1, 2) ~= "--" then + return nil + end + + return self:sub(3) +end + +return function (opts) + local args = {} + + local current_index = 1 + local current_flag = nil + + local params = {} + + for _, v in ipairs(opts) do + if v.kind ~= nil then + params[v.name] = v + args[v.name] = v.default + else + params[#params + 1] = v + end + end + + for _, value in ipairs(arg) do + local key = nil + if current_flag == nil then + local flag = value:flag() + if flag == nil then + local option = params[current_index] + current_index = current_index + 1 + + if option == nil then + print("error: too many arguments") + help(opts) + end + + key = option.name + else + local option = params[flag] + + if option == nil then + print("error: unknown flag '" .. flag .. "'") + help(opts) + end + + if option.kind == 'flag' then + key = flag + value = true + else + current_flag = flag + goto next + end + end + else + local option = params[current_flag] + + key = option.name + current_flag = nil + end + + args[key] = value + + ::next:: + end + + for _, option in ipairs(opts) do + if (option.kind == nil or option.required) and args[option.name] == nil then + print("error: missing argument '" .. option.name .. "'") + help(opts) + end + end + + return args +end diff --git a/src/blueprint b/src/blueprint new file mode 100755 index 0000000..ab0cba1 --- /dev/null +++ b/src/blueprint @@ -0,0 +1,16 @@ +#!/usr/bin/env lua + +function setup_package() + local str = debug.getinfo(2, "S").source:sub(2) + local path = str:match("(.*/)") or "./" + package.path = path .. '?.lua;' +end + +setup_package() + +local args = require('arg') { + { name = "path" }, + + { name = "template", description = "some description", kind = "property", required = true }, + { name = "flag", description = "other description", kind = "flag" }, +} |