most of this should've been committed a long time ago...

2026-06-05 16:50:12 -06:00
parent de3b36cc93
commit 9b4d9bf497
6 changed files with 224 additions and 1 deletions
@@ -0,0 +1,122 @@
+#!/usr/bin/env luajit
+
+package.path = (arg[0]:match("@?(.*/)") or arg[0]:match("@?(.*\\)")) .. "lib" .. package.config:sub(1, 1) .. "?.lua;" .. package.path
+local utility = require "utility"
+local json = utility.require("dkjson")
+
+local PATH = "PRIVATE_DATA/notebook"
+local whitelist = { md = true, }
+
+local embedding_model = "nomic-embed-text"
+local maximum_file_size = 2048
+
+-- strip YAML frontmatter (if present)
+--   can error, will return nil & error message
+local function strip_frontmatter(text)
+  local tab = text:split("\n")
+  if tab[1] == "---" then
+    table.remove(tab, 1)
+    while true do
+      local done = tab[1] == "---"
+      table.remove(tab, 1)
+      if done then
+        return table.concat(tab, "\n")
+      elseif #tab < 1 then
+        return nil, "Invalid YAML frontmatter."
+      end
+    end
+  end
+  return text
+end
+
+local tree
+tree = function(path, fn)
+  utility.list(path or ".", function(path_name)
+    if utility.is_file(path_name) then
+      fn(path_name)
+    else
+      tree(path .. utility.path_separator .. path_name, fn)
+    end
+  end)
+end
+
+local function leftpad(text, length)
+  return string.rep("0", length - #(tostring(text))) .. text
+end
+
+
+
+local file_list = {}
+local embeddings = {}
+
+tree(PATH, function(file_name)
+  local path, name, extension = utility.split_path_components(file_name)
+  if not extension then
+    return
+  end
+
+  if not whitelist[extension] then
+    return
+  end
+
+  file_list[#file_list + 1] = file_name
+end)
+
+for i = 1, #file_list do
+  local function _run()
+    local file_name = file_list[i]
+
+    -- stripping YAML frontmatter before generating embeddings
+    local file_contents = utility.open(file_name, "r", function(file)
+      return file:read("*all")
+    end)
+
+    local tmp_file_contents, error_message = strip_frontmatter(file_contents)
+    if tmp_file_contents == nil then
+      print("ERROR: " .. file_name .. " " .. error_message)
+      tmp_file_contents = file_contents
+    end
+
+    if #tmp_file_contents == 0 then
+      print(file_name .. "\n is empty and will be skipped.")
+      return
+    end
+
+    if #tmp_file_contents > maximum_file_size then
+      print(file_name .. "\n is too long. Only the first " .. maximum_file_size .. " bytes will be scanned.")
+      tmp_file_contents = tmp_file_contents:sub(1, maximum_file_size)
+    end
+
+    local tmp_file_name = utility.tmp_file_name()
+    utility.open(tmp_file_name, "w", function(file)
+      file:write(tmp_file_contents)
+    end)
+
+    local output = utility.capture_safe("cat " .. tmp_file_name:enquote() .. " | ollama run " .. embedding_model)
+    os.execute("rm " .. tmp_file_name)
+    output = output:sub(1, -2) -- strip extra newline from utility.capture_safe
+
+    if #output == 0 then
+      print("Warning: " .. file_name .. " did not have embeddings generated.")
+      return
+    end
+
+    output = setmetatable({ vector = output }, {
+      __tojson = function(self, state)
+        return self.vector
+      end
+    })
+
+    embeddings[file_name] = { vector = output }
+
+    print("Finished " .. leftpad(i, #tostring(#file_list)) .. "/" .. #file_list .. " (" .. leftpad(math.floor(i / #file_list * 100), 3) .. "%)")
+  end
+
+  _run()
+end
+
+utility.open("PRIVATE_DATA/embeddings.json", "w", function(file)
+  local output = json.encode(embeddings, { indent = true })
+  file:write(output)
+  file:write("\n")
+end)