optionally allow list of additional CLI options to send to pip install

this is helpful for cross-platform builds such as packaging in an alpine context for an al2 runtime context

Author: cazlo

examples/build-package/main.tf

@@ -163,6 +163,24 @@ module "package_file_with_pip_requirements" {
   ]
 }
 
+# Create zip-archive which contains:
+# 1. A single file - index.py
+# 2. Run "pip install" with specified requirements.txt with additional options CLI --only-binary=:all: --platform manylinux2014_x86_64
+module "package_file_with_pip_requirements_and_pip_additional_options" {
+  source = "../../"
+
+  create_function = false
+
+  runtime = "python3.12"
+  pip_additional_options = ["-only-binary=:all:", "--platform", "manylinux2014_x86_64"]
+  source_path = [
+    "${path.module}/../fixtures/python-app1/index.py",
+    {
+      pip_requirements = "${path.module}/../fixtures/python-app1/requirements.txt"
+    }
+  ]
+}
+
 # Create zip-archive which contains:
 # 1. A single file - index.py
 # 2. Content of directory "dir2"

package.py

@@ -1060,6 +1060,7 @@ def install_pip_requirements(query, requirements_file, tmp_dir):
     artifacts_dir = query.artifacts_dir
     docker = query.docker
     temp_dir = query.temp_dir
+    pip_additional_options = query.pip_additional_options
     docker_image_tag_id = None
 
     if docker:
@@ -1125,7 +1126,7 @@ def install_pip_requirements(query, requirements_file, tmp_dir):
                 "--prefix=",
                 "--target=.",
                 "--requirement={}".format(requirements_filename),
-            ]
+            ] + pip_additional_options
             if docker:
                 with_ssh_agent = docker.with_ssh_agent
                 pip_cache_dir = docker.docker_pip_cache

package.tf

@@ -40,6 +40,8 @@ data "external" "archive_prepare" {
     )
 
     recreate_missing_package = var.recreate_missing_package
+
+    pip_additional_options = jsonencode(var.pip_additional_options)
   }
 }
 

variables.tf

@@ -806,6 +806,12 @@ variable "trigger_on_package_timestamp" {
   default     = true
 }
 
+variable "pip_additional_options" {
+  description = "Additional options to pass to the pip install command (e.g. to platform, etc.)"
+  type        = list(string)
+  default     = []
+}
+
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