From d5b7afbf6e752da217a60cde08afd414f73e9e55 Mon Sep 17 00:00:00 2001
From: Max Howell <mxcl@me.com>
Date: Sun, 30 Jul 2023 11:18:11 -0400
Subject: [PATCH] +micromamba (#2681)

---
 .../github.com/mamba-org/micro/package.yml    | 48 +++++++++++++++++++
 projects/github.com/mamba-org/micro/test.py   | 20 ++++++++
 2 files changed, 68 insertions(+)
 create mode 100644 projects/github.com/mamba-org/micro/package.yml
 create mode 100755 projects/github.com/mamba-org/micro/test.py

diff --git a/projects/github.com/mamba-org/micro/package.yml b/projects/github.com/mamba-org/micro/package.yml
new file mode 100644
index 00000000..64d6c0c6
--- /dev/null
+++ b/projects/github.com/mamba-org/micro/package.yml
@@ -0,0 +1,48 @@
+versions:
+  github: mamba-org/micromamba-releases
+  strip: /-\d+$/
+  #FIXME ^^ versions are eg. 1.2.3-1 where the releases are usually -0
+  #      ^^ and revisions are increments of 1 so this is actually a 4th version
+  #      ^^ number for us that we need to extract
+
+provides:
+  - bin/micromamba
+
+warnings:
+  - vendored
+
+platforms:
+  - darwin
+  # broken on linux pending https://github.com/mamba-org/mamba/issues/2650
+
+dependencies:
+  curl.se/ca-certs: '*'
+
+runtime:
+  env:
+    REQUESTS_CA_BUNDLE: ${{deps.curl.se/ca-certs.prefix}}/ssl/cert.pem
+
+build:
+  dependencies:
+    curl.se: '*'
+    sourceware.org/bzip2: '*'
+  working-directory: "{{prefix}}"
+  script: |
+    curl -L \
+      "https://github.com/mamba-org/micromamba-releases/releases/download/{{version.tag}}/micromamba-$PID.tar.bz2" \
+      | tar xj
+    rm -rf info
+  env:
+    linux/x86-64: {PID: linux-64}
+    linux/aarch64: {PID: linux-aarch64}
+    darwin/x86-64: {PID: osx-64}
+    darwin/aarch64: {PID: osx-arm64}
+
+test:
+  - micromamba | grep {{version}}
+
+  - |
+    eval "$(micromamba shell hook --shell bash)"
+    micromamba create numpy --channel anaconda --prefix mm-prefix --yes
+    micromamba activate mm-prefix
+    ./test.py
diff --git a/projects/github.com/mamba-org/micro/test.py b/projects/github.com/mamba-org/micro/test.py
new file mode 100755
index 00000000..abc72b2c
--- /dev/null
+++ b/projects/github.com/mamba-org/micro/test.py
@@ -0,0 +1,20 @@
+#!/usr/bin/env python
+# https://www.pugetsystems.com/labs/hpc/standalone-python-conda-envs-without-installing-conda-using-micromamba-2287/
+
+"""
+Matrix multiplication of 2 n x n matrices
+"""
+
+import numpy as np
+import time
+
+n = 8000
+A = np.array(np.random.rand(n, n))
+B = np.array(np.random.rand(n, n))
+C = np.empty_like(A)
+
+start_time = time.time()
+C = np.matmul(A, B)
+run_time = time.time() - start_time
+
+print( f'{(2e-9 * (n ** 3 + n ** 2)) / run_time :.2f} GFLOPS' )