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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" ())
(declare-function gptel-context--wrap "gptel-context")
(declare-function gptel-context--collect-media "gptel-context")
(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."
(when (and gptel--system-message
(not (gptel--model-capable-p 'nosystem)))
(push (list :role "system"
:content gptel--system-message)
prompts))
(let* ((prompts-plist
(gptel--merge-plists
`(:model ,(gptel--model-name gptel-model)
:messages [,@prompts]
:stream ,(or (and gptel-stream gptel-use-curl
(gptel-backend-stream gptel-backend))
:json-false))
(gptel-backend-request-params gptel-backend)
(gptel--model-request-params gptel-model)))
;; the initial options (if any) from request params
(options-plist (plist-get prompts-plist :options)))
;; if the temperature and max-tokens aren't set as
;; backend/model-specific, use the global settings
(when (and gptel-temperature (not (plist-get options-plist :temperature)))
(setq options-plist
(plist-put options-plist :temperature gptel-temperature)))
(when (and gptel-max-tokens (not (plist-get options-plist :num_predict)))
(setq options-plist
(plist-put options-plist :num_predict gptel-max-tokens)))
(plist-put prompts-plist :options options-plist)))
(cl-defmethod gptel--parse-list ((_backend gptel-ollama) prompt-list)
(cl-loop for text in prompt-list
for role = t then (not role)
if text collect
(list :role (if role "user" "assistant") :content text)))
(cl-defmethod gptel--parse-buffer ((_backend gptel-ollama) &optional max-entries)
(let ((prompts) (prop)
(include-media (and gptel-track-media (or (gptel--model-capable-p 'media)
(gptel--model-capable-p 'url)))))
(if (or gptel-mode gptel-track-response)
(while (and
(or (not max-entries) (>= max-entries 0))
(setq prop (text-property-search-backward
'gptel 'response
(when (eq (get-char-property (max (point-min) (1- (point)))
'gptel)
'response)
t))))
(if (prop-match-value prop) ;assistant role
(push (list :role "assistant"
:content (buffer-substring-no-properties (prop-match-beginning prop)
(prop-match-end prop)))
prompts)
(if include-media
(push (append '(:role "user")
(gptel--ollama-parse-multipart
(gptel--parse-media-links
major-mode (prop-match-beginning prop) (prop-match-end prop))))
prompts)
(push (list :role "user"
:content
(gptel--trim-prefixes
(buffer-substring-no-properties (prop-match-beginning prop)
(prop-match-end prop))))
prompts)))
(and max-entries (cl-decf max-entries)))
(push (list :role "user"
:content
(string-trim (buffer-substring-no-properties (point-min) (point-max))))
prompts))
prompts))
(defun gptel--ollama-parse-multipart (parts)
"Convert a multipart prompt PARTS to the Ollama API format.
The input is an alist of the form
((:text \"some text\")
(:media \"/path/to/media.png\" :mime \"image/png\")
(:text \"More text\")).
The output is a vector of entries in a backend-appropriate
format."
(cl-loop
for part in parts
for n upfrom 1
with last = (length parts)
for text = (plist-get part :text)
for media = (plist-get part :media)
if text do
(and (or (= n 1) (= n last)) (setq text (gptel--trim-prefixes text))) and
unless (string-empty-p text)
collect text into text-array end
else if media
collect (gptel--base64-encode media) into media-array end
finally return
`(,@(and text-array (list :content (mapconcat #'identity text-array " ")))
,@(and media-array (list :images (vconcat media-array))))))
(cl-defmethod gptel--wrap-user-prompt ((_backend gptel-ollama) prompts
&optional inject-media)
"Wrap the last user prompt in PROMPTS with the context string.
If INJECT-MEDIA is non-nil wrap it with base64-encoded media files in the context."
(if inject-media
;; Wrap the first user prompt with included media files/contexts
(when-let* ((media-list (gptel-context--collect-media))
(media-processed (gptel--ollama-parse-multipart media-list)))
(cl-callf (lambda (images)
(vconcat (plist-get media-processed :images)
images))
(plist-get (cadr prompts) :images)))
;; Wrap the last user prompt with included text contexts
(cl-callf gptel-context--wrap (plist-get (car (last prompts)) :content))))
;;;###autoload
(cl-defun gptel-make-ollama
(name &key curl-args header key models stream request-params
(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, as symbols.
Additionally, you can specify supported LLM capabilities like
vision or tool-use by appending a plist to the model with more
information, in the form
(model-name . plist)
Currently recognized plist keys are :description, :capabilities
and :mime-types. An example of a model specification including
both kinds of specs:
:models
\\='(mistral:latest ;Simple specs
openhermes:latest
(llava:13b ;Full spec
:description
\"Llava 1.6: Large Lanuage and Vision Assistant\"
:capabilities (media)
:mime-types (\"image/jpeg\" \"image/png\")))
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.
REQUEST-PARAMS (optional) is a plist of additional HTTP request
parameters (as plist keys) and values supported by the API. Use
these to set parameters that gptel does not provide user options
for.
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 (gptel--process-models models)
:protocol protocol
:endpoint endpoint
:stream stream
:request-params request-params
: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