support Nix and NixOS

Quick Start for BTC:

    $ git clone https://github.com/mmgen/mmgen-wallet
    $ git clone https://github.com/mmgen/mmgen-node-tools
    $ cd mmgen-node-tools
    $ test/init.sh
    $ nix-shell --pure nix

Enable altcoins and additional packages:

    # From the mmgen-node-tools repository root:
    $ mkdir -p ~/.mmgen
    $ cp ../mmgen-wallet/nix/user-packages.nix ~/.mmgen
    # ... edit ~/.mmgen/user-packages.nix as required ...
    $ nix-shell --pure nix

For NixOS installation and other information, see:

    nix/README.node-tools
    ../mmgen-wallet/nix/README

mmgen_node_tools/data/version

@@ -1 +1 @@
-3.5.dev3
+3.5.dev4

nix/README.node-tools

@@ -0,0 +1,11 @@
+Nix configuration directory for the MMGen Node Tools suite
+
+Usage is as described in ‘nix/README’ in the mmgen-wallet repository, with the
+following differences:
+
+  a) all commands are executed from the repository root of mmgen-node-tools
+     instead of mmgen-wallet
+
+  b) for NixOS, complete the steps as described up until the rebuild step.
+     Copy the contents of this directory to ‘/etc/nixos/mmgen-project’ (this
+     will overwrite ‘default.nix’), and continue with the rebuild step.

nix/default.nix

@@ -0,0 +1,6 @@
+import (
+    if builtins.pathExists ./merged-packages.nix then
+        ./merged-packages.nix
+    else
+        ../../mmgen-wallet/nix/merged-packages.nix
+    ) { add_pkgs_path = ./node-tools-packages.nix; }

nix/node-tools-packages.nix

@@ -0,0 +1,12 @@
+{ pkgs, python }:
+
+{
+    system-packages = with pkgs; {
+        cacert = cacert; # ticker (curl)
+    };
+
+    python-packages = with python.pkgs; {
+        yahooquery = (pkgs.callPackage ./yahooquery.nix {}); # ticker
+        pyyaml = pyyaml;                                     # ticker
+    };
+}

nix/shell.nix

@@ -0,0 +1 @@
+import ../../mmgen-wallet/nix/shell.nix { add_pkgs_path = ./node-tools-packages.nix; }

nix/yahooquery-noversioning.patch

@@ -0,0 +1,45 @@
+diff --git a/pyproject.toml b/pyproject.toml
+index 9d3fb29..399c215 100644
+--- a/pyproject.toml
++++ b/pyproject.toml
+@@ -10,24 +10,24 @@ readme = "README.md"
+ 
+ [tool.poetry.dependencies]
+ python = ">=3.8.1,<4.0"
+-requests = "^2.31.0"
+-pandas = "^2.0.3"
+-requests-futures = "^1.0.1"
+-tqdm = "^4.65.0"
+-lxml = "^4.9.3"
+-selenium = {version = "^4.10.0", optional = true}
+-beautifulsoup4 = "^4.12.2"
++requests = ">=2.31.0"
++pandas = ">=2.0.3"
++requests-futures = ">=1.0.1"
++tqdm = ">=4.65.0"
++lxml = ">=4.9.3"
++selenium = {version = ">=4.10.0", optional = true}
++beautifulsoup4 = ">=4.12.2"
+ 
+ [tool.poetry.dev-dependencies]
+-pytest = "^7.4.0"
+-isort = "^5.0.0"
+-flake8 = "^6.0.0"
+-mypy = "^1.4.1"
+-pytest-cov = "^4.1.0"
+-black = "^23.7.0"
+-pre-commit = "^3.3.3"
+-ipython = "^8.0.0"
+-mkdocs-material = "^9.1.18"
++pytest = ">=7.4.0"
++isort = ">=5.0.0"
++flake8 = ">=6.0.0"
++mypy = ">=1.4.1"
++pytest-cov = ">=4.1.0"
++black = ">=23.7.0"
++pre-commit = ">=3.3.3"
++ipython = ">=8.0.0"
++mkdocs-material = ">=9.1.18"
+ 
+ [build-system]
+ requires = ["poetry-core>=1.0.0"]

nix/yahooquery.nix

@@ -0,0 +1,44 @@
+{
+    lib,
+    pkgs,
+    fetchFromGitHub,
+}:
+
+with pkgs.python312.pkgs;
+
+buildPythonPackage rec {
+    pname = "yahooquery";
+    version = "2.3.7";
+    pyproject = true;
+
+    disabled = pythonOlder "3.8.1";
+
+    src = fetchFromGitHub {
+        owner = "dpguthrie";
+        repo = "yahooquery";
+        rev = "refs/tags/v${version}";
+        hash = "sha256-Iyuni1SoTB6f7nNFhN5A8Gnv9kV78frjpqvvW8qd+/M=";
+    };
+
+    patches = [ ./yahooquery-noversioning.patch ];
+
+    build-system = [ poetry-core ];
+
+    dependencies = [
+       requests         # ^2.31.0
+       pandas           # ^2.0.3
+       requests-futures # ^1.0.1
+       tqdm             # ^4.65.0
+       lxml             # ^4.9.3
+       selenium         # {version = ^4.10.0, optional = true}
+       beautifulsoup4   # ^4.12.2
+    ];
+
+    doCheck = false; # skip tests
+
+    meta = with lib; {
+        description = "Python wrapper for an unofficial Yahoo Finance API";
+        homepage = "https://yahooquery.dpguthrie.com";
+        license = licenses.mit;
+    };
+}

setup.cfg

@@ -38,7 +38,7 @@ python_requires = >=3.9
 include_package_data = True
 
 install_requires =
-	mmgen-wallet>=15.1.dev6
+	mmgen-wallet>=15.1.dev9
 	pyyaml
 	yahooquery