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gptel-ollama.el
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gptel-ollama.el
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;;; gptel-ollama.el --- Ollama support for gptel -*- lexical-binding: t; -*-
;; Copyright (C) 2023 Karthik Chikmagalur
;; Author: Karthik Chikmagalur <[email protected]>
;; Keywords: hypermedia
;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;; This file adds support for the Ollama LLM API to gptel
;;; Code:
(require 'gptel)
(require 'cl-generic)
(declare-function json-read "json" ())
(defvar json-object-type)
;;; Ollama
(cl-defstruct (gptel-ollama (:constructor gptel--make-ollama)
(:copier nil)
(:include gptel-backend)))
(defvar-local gptel--ollama-token-count 0
"Token count for ollama conversations.
This variable holds the total token count for conversations with
Ollama models.
Intended for internal use only.")
(cl-defmethod gptel-curl--parse-stream ((_backend gptel-ollama) info)
"Parse response stream for the Ollama API."
(when (and (bobp) (re-search-forward "^{" nil t))
(forward-line 0))
(let* ((content-strs) (content) (pt (point)))
(condition-case nil
(while (setq content (gptel--json-read))
(setq pt (point))
(let ((done (map-elt content :done))
(response (map-nested-elt content '(:message :content))))
(push response content-strs)
(unless (eq done :json-false)
(with-current-buffer (plist-get info :buffer)
(cl-incf gptel--ollama-token-count
(+ (or (map-elt content :prompt_eval_count) 0)
(or (map-elt content :eval_count) 0))))
(goto-char (point-max)))))
(error (goto-char pt)))
(apply #'concat (nreverse content-strs))))
(cl-defmethod gptel--parse-response ((_backend gptel-ollama) response info)
"Parse a one-shot RESPONSE from the Ollama API."
(when-let ((context
(+ (or (map-elt response :prompt_eval_count) 0)
(or (map-elt response :eval_count) 0))))
(with-current-buffer (plist-get info :buffer)
(cl-incf gptel--ollama-token-count context)))
(map-nested-elt response '(:message :content)))
(cl-defmethod gptel--request-data ((_backend gptel-ollama) prompts)
"JSON encode PROMPTS for sending to ChatGPT."
(let ((prompts-plist
`(:model ,gptel-model
:messages [,@prompts]
:stream ,(or (and gptel-stream gptel-use-curl
(gptel-backend-stream gptel-backend))
:json-false)))
options-plist)
(when gptel-temperature
(setq options-plist
(plist-put options-plist :temperature
gptel-temperature)))
(when gptel-max-tokens
(setq options-plist
(plist-put options-plist :num_predict
gptel-max-tokens)))
(when options-plist
(plist-put prompts-plist :options options-plist))
prompts-plist))
(cl-defmethod gptel--parse-buffer ((_backend gptel-ollama) &optional max-entries)
(let ((prompts) (prop))
(while (and
(or (not max-entries) (>= max-entries 0))
(setq prop (text-property-search-backward
'gptel 'response
(when (get-char-property (max (point-min) (1- (point)))
'gptel)
t))))
(push (list :role (if (prop-match-value prop) "assistant" "user")
:content
(string-trim
(buffer-substring-no-properties (prop-match-beginning prop)
(prop-match-end prop))
(format "[\t\r\n ]*\\(?:%s\\)?[\t\r\n ]*"
(regexp-quote (gptel-prompt-prefix-string)))
(format "[\t\r\n ]*\\(?:%s\\)?[\t\r\n ]*"
(regexp-quote (gptel-response-prefix-string)))))
prompts)
(and max-entries (cl-decf max-entries)))
(cons (list :role "system"
:content gptel--system-message)
prompts)))
;;;###autoload
(cl-defun gptel-make-ollama
(name &key curl-args header key models stream
(host "localhost:11434")
(protocol "http")
(endpoint "/api/chat"))
"Register an Ollama backend for gptel with NAME.
Keyword arguments:
CURL-ARGS (optional) is a list of additional Curl arguments.
HOST is where Ollama runs (with port), defaults to localhost:11434
MODELS is a list of available model names.
STREAM is a boolean to toggle streaming responses, defaults to
false.
PROTOCOL (optional) specifies the protocol, http by default.
ENDPOINT (optional) is the API endpoint for completions, defaults to
\"/api/generate\".
HEADER (optional) is for additional headers to send with each
request. It should be an alist or a function that retuns an
alist, like:
((\"Content-Type\" . \"application/json\"))
KEY (optional) is a variable whose value is the API key, or
function that returns the key. This is typically not required
for local models like Ollama.
Example:
-------
(gptel-make-ollama
\"Ollama\"
:host \"localhost:11434\"
:models \\='(\"mistral:latest\")
:stream t)"
(declare (indent 1))
(let ((backend (gptel--make-ollama
:curl-args curl-args
:name name
:host host
:header header
:key key
:models models
:protocol protocol
:endpoint endpoint
:stream stream
:url (if protocol
(concat protocol "://" host endpoint)
(concat host endpoint)))))
(prog1 backend
(setf (alist-get name gptel--known-backends
nil nil #'equal)
backend))))
(provide 'gptel-ollama)
;;; gptel-ollama.el ends here