build: enable musllinux wheels (#349)

* enable musllinux wheels

* see if we can wrangle apk

* apk add, not install; handle eventuality of debian

* need to add gmp-dev as well

Author: lgray

pyproject.toml

@@ -93,15 +93,14 @@ strict_equality = true
 ignore_missing_imports = true
 
 [tool.cibuildwheel]
-# Skip musllinux builds for the moment
-skip = "*-musllinux_*"
 test-extras = "test"
 test-command = "pytest {project}/tests"
 
 [tool.cibuildwheel.linux]
 before-all = [
-    "yum update -y",
-    "yum install -y mpfr-devel",
+    "if command -v yum > /dev/null; then yum update -y; yum install -y mpfr-devel; fi",
+    "if command -v apt-get > /dev/null; then apt-get update -y; apt-get install -y libmpfr-dev; fi",
+    "if command -v apk > /dev/null; then apk update; apk add mpfr-dev gmp-dev; fi",
     "curl -L https://archives.boost.io/release/1.87.0/source/boost_1_87_0.tar.bz2 -o boost_1_87_0.tar.bz2",
     "tar --bzip2 -xf boost_1_87_0.tar.bz2",
     "mv boost_1_87_0/boost /usr/include/boost",