# What does this PR do?
This is the second attempt to switch to system packages by default. Now
with a hack to detect conda environment - in which case conda image-type
is used.
Note: Conda will only be used when --image-name is unset *and*
CONDA_DEFAULT_ENV is set. This means that users without conda will
correctly fall back to using system packages when no --image-* arguments
are passed at all.
[//]: # (If resolving an issue, uncomment and update the line below)
[//]: # (Closes #[issue-number])
## Test Plan
Uses virtualenv:
```
$ llama stack build --template ollama --image-type venv
$ llama stack run --image-type venv ~/.llama/distributions/ollama/ollama-run.yaml
[...]
Using virtual environment: /home/ec2-user/src/llama-stack/schedule/.local
[...]
```
Uses system packages (virtualenv already initialized):
```
$ llama stack run ~/.llama/distributions/ollama/ollama-run.yaml
[...]
INFO 2025-03-27 20:46:22,882 llama_stack.cli.stack.run:142 server: No image type or image name provided. Assuming environment packages.
[...]
```
Attempt to run from environment packages without necessary packages
installed:
```
$ python -m venv barebones
$ . ./barebones/bin/activate
$ pip install -e . # to install llama command
$ llama stack run ~/.llama/distributions/ollama/ollama-run.yaml
[...]
ModuleNotFoundError: No module named 'fastapi'
```
^ failed as expected because the environment doesn't have necessary
packages installed.
Now install some packages in the new environment:
```
$ pip install fastapi opentelemetry-api opentelemetry-sdk opentelemetry-exporter-otlp aiosqlite ollama openai datasets faiss-cpu mcp autoevals
$ llama stack run ~/.llama/distributions/ollama/ollama-run.yaml
[...]
Uvicorn running on http://['::', '0.0.0.0']:8321 (Press CTRL+C to quit)
```
Now see if setting CONDA_DEFAULT_ENV will change what happens by
default:
```
$ export CONDA_DEFAULT_ENV=base
$ llama stack run ~/.llama/distributions/ollama/ollama-run.yaml
[...]
Using conda environment: base
Conda environment base does not exist.
[...]
```
---------
Signed-off-by: Ihar Hrachyshka <ihar.hrachyshka@gmail.com>
# What does this PR do?
[Provide a short summary of what this PR does and why. Link to relevant
issues if applicable.]
```
before:
$ llama
usage: llama [-h] {model,stack,download,verify-download} ...
Welcome to the Llama CLI
options:
-h, --help show this help message and exit
subcommands:
{model,stack,download,verify-download}
$ llama model --help
usage: llama model [-h] {download,list,prompt-format,describe,verify-download,remove} ...
Work with llama models
options:
-h, --help show this help message and exit
model_subcommands:
{download,list,prompt-format,describe,verify-download,remove}
$ llama stack --help
usage: llama stack [-h] [--version] {build,list-apis,list-providers,run} ...
Operations for the Llama Stack / Distributions
options:
-h, --help show this help message and exit
--version show program's version number and exit
stack_subcommands:
{build,list-apis,list-providers,run}
===================
after:
$ llama
usage: llama [-h] {model,stack,download,verify-download} ...
Welcome to the Llama CLI
options:
-h, --help show this help message and exit
subcommands:
{model,stack,download,verify-download}
model Work with llama models
stack Operations for the Llama Stack / Distributions
download Download a model from llama.meta.com or Hugging Face Hub
verify-download Verify integrity of downloaded model files
$ llama model --help
usage: llama model [-h] {download,list,prompt-format,describe,verify-download,remove} ...
Work with llama models
options:
-h, --help show this help message and exit
model_subcommands:
{download,list,prompt-format,describe,verify-download,remove}
download Download a model from llama.meta.com or Hugging Face Hub
list Show available llama models
prompt-format Show llama model message formats
describe Show details about a llama model
verify-download Verify the downloaded checkpoints' checksums for models downloaded from Meta
remove Remove the downloaded llama model
$ llama stack --help
usage: llama stack [-h] [--version] {build,list-apis,list-providers,run} ...
Operations for the Llama Stack / Distributions
options:
-h, --help show this help message and exit
--version show program's version number and exit
stack_subcommands:
{build,list-apis,list-providers,run}
build Build a Llama stack container
list-apis List APIs part of the Llama Stack implementation
list-providers Show available Llama Stack Providers for an API
run Start the server for a Llama Stack Distribution. You should have already built (or downloaded) and configured the distribution.
```
[//]: # (If resolving an issue, uncomment and update the line below)
[//]: # (Closes #[issue-number])
## Test Plan
[Describe the tests you ran to verify your changes with result
summaries. *Provide clear instructions so the plan can be easily
re-executed.*]
[//]: # (## Documentation)
---------
Signed-off-by: reidliu <reid201711@gmail.com>
Co-authored-by: reidliu <reid201711@gmail.com>
