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AI code archaeology
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Files
lib/indexer.ex
defmodule Indexer do
@moduledoc """
This module provides the functionality for the `index` and `delete`
sub-commands.
"""
defstruct [
:project,
:root,
:store,
:concurrency,
:reindex,
:ai_module,
:ai
]
@doc """
Create a new `Indexer` struct.
"""
def new(opts, ai_module \\ AI) do
concurrency = Map.get(opts, :concurrency, 1)
reindex = Map.get(opts, :reindex, false)
idx = %Indexer{
project: opts.project,
root: opts.directory,
store: Store.new(opts.project),
concurrency: concurrency,
reindex: reindex,
ai_module: ai_module,
ai: ai_module.new()
}
idx
end
@doc """
Run the indexing process using the given `Indexer` struct. If `force_reindex`
is `true`, the project will be deleted and reindexed from scratch.
"""
def run(idx) do
if idx.reindex do
# When --force-reindex is passed, delete the project completely and start
# from scratch.
IO.puts("Deleting all embeddings to force full reindexing of #{idx.project}")
Store.delete_project(idx)
else
# Otherwise, just delete any files that no longer exist.
IO.puts("Deleting missing files from #{idx.project}")
Store.delete_missing_files(idx.store, idx.root)
end
{:ok, queue} =
Queue.start_link(idx.concurrency, fn file ->
IO.write(".")
process_file(idx, file)
IO.write(".")
end)
scanner = Scanner.new(idx.root, fn file -> Queue.queue(queue, file) end)
IO.puts("Indexing files in #{idx.root}")
Scanner.scan(scanner)
Queue.shutdown(queue)
Queue.join(queue)
IO.puts("done!")
end
@doc """
Permanently deletes the project from the store.
"""
def delete_project(idx) do
Store.delete_project(idx.store)
end
defp process_file(idx, file) do
existing_hash = Store.get_hash(idx.store, file)
file_hash = sha256(file)
if is_nil(existing_hash) or existing_hash != file_hash do
file_contents = File.read!(file)
with {:ok, summary} <- get_summary(idx, file, file_contents),
{:ok, embeddings} <- get_embeddings(idx, file, summary, file_contents) do
Store.put(idx.store, file, file_hash, summary, embeddings)
else
{:error, reason} -> IO.puts("Error processing file: #{file} - #{reason}")
end
end
end
defp get_summary(idx, file, file_contents, attempt \\ 0) do
idx.ai_module.get_summary(idx.ai, file, file_contents)
|> case do
{:ok, summary} ->
{:ok, summary}
{:error, %OpenaiEx.Error{message: "Request timed out."}} ->
if attempt < 3 do
IO.puts("request to summarize file timed out, retrying (attempt #{attempt + 1}/3)")
get_summary(idx, file, file_contents, attempt + 1)
else
{:error, "request to summarize file timed out after 3 attempts"}
end
{:error, reason} ->
{:error, reason}
end
end
defp get_embeddings(idx, file, summary, file_contents, attempt \\ 0) do
to_embed = """
# File
`#{file}`
## Summary
#{summary}
## Contents
```
#{file_contents}
```
"""
idx.ai_module.get_embeddings(idx.ai, to_embed)
|> case do
{:ok, embeddings} ->
{:ok, embeddings}
{:error, %OpenaiEx.Error{message: "Request timed out."}} ->
if attempt < 3 do
IO.puts("request to index file timed out, retrying (attempt #{attempt + 1}/3)")
get_embeddings(idx, file, summary, file_contents, attempt + 1)
else
{:error, "request to index file timed out after 3 attempts"}
end
{:error, reason} ->
{:error, reason}
end
end
defp sha256(file_path) do
case File.read(file_path) do
{:ok, content} -> :crypto.hash(:sha256, content) |> Base.encode16(case: :lower)
{:error, reason} -> {:error, reason}
end
end
end