mirror of
https://github.com/likelovewant/ollama-for-amd.git
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move thinking logic into its own package (#10990)
move thinking logic into its own package
This commit is contained in:
Devon Rifkin
171
thinking/parser.go
Normal file
171
thinking/parser.go
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@@ -0,0 +1,171 @@
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package thinking
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import (
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"strings"
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"unicode"
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)
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type thinkingState int
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const (
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// We're looking for the opening tag, but we haven't seen any non-whitespace
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// characters yet
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thinkingState_LookingForOpening thinkingState = iota
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// We've seen the opening tag, but we haven't seen any non-whitespace
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// characters yet (we want to eat any whitespace between the opening tag and
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// the thinking content)
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thinkingState_ThinkingStartedEatingWhitespace
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// We've seen non-whitespace characters after the opening tag, but we haven't
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// seen the closing tag yet
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thinkingState_Thinking
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// We've seen the closing tag, but we haven't seen any non-whitespace
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// characters after the closing tag yet (we want to eat any whitespace between
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// the closing tag and the content)
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thinkingState_ThinkingDoneEatingWhitespace
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// We've seen the closing tag and seen at least one non-whitespace character
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// after it
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thinkingState_ThinkingDone
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)
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func (s thinkingState) String() string {
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switch s {
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case thinkingState_LookingForOpening:
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return "LookingForOpening"
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case thinkingState_ThinkingStartedEatingWhitespace:
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return "ThinkingStartedEatingWhitespace"
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case thinkingState_Thinking:
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return "Thinking"
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case thinkingState_ThinkingDoneEatingWhitespace:
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return "ThinkingDoneEatingWhitespace"
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case thinkingState_ThinkingDone:
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return "ThinkingDone"
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default:
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return "Unknown"
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}
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}
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type Parser struct {
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state thinkingState
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OpeningTag string
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ClosingTag string
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acc strings.Builder
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}
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// AddContent returns the thinking content and the non-thinking content that
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// should be immediately sent to the user. It will internally buffer if it needs
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// to see more raw content to disambiguate
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func (s *Parser) AddContent(content string) (string, string) {
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s.acc.WriteString(content)
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var thinkingSb, remainingSb strings.Builder
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var thinking, remaining string
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keepLooping := true
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// we loop because we might pass through multiple parsing states in a single
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// call to addContent, and we want to make sure callers don't have to wait for
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// data that's already unambiguous
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for keepLooping {
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thinking, remaining, keepLooping = eat(s)
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thinkingSb.WriteString(thinking)
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remainingSb.WriteString(remaining)
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}
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return thinkingSb.String(), remainingSb.String()
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}
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// the additional bool return is true iff we should continue eating
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func eat(s *Parser) (string, string, bool) {
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switch s.state {
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case thinkingState_LookingForOpening:
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trimmed := strings.TrimLeftFunc(s.acc.String(), unicode.IsSpace)
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if strings.HasPrefix(trimmed, s.OpeningTag) {
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after := strings.Join(strings.Split(trimmed, s.OpeningTag)[1:], s.OpeningTag)
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after = strings.TrimLeftFunc(after, unicode.IsSpace)
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// after might contain more than just thinking tokens, so we continue
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// parsing instead of returning it as thinking tokens here
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s.acc.Reset()
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s.acc.WriteString(after)
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if after == "" {
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s.state = thinkingState_ThinkingStartedEatingWhitespace
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} else {
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s.state = thinkingState_Thinking
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}
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return "", "", true
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} else if strings.HasPrefix(s.OpeningTag, trimmed) {
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// partial opening seen, so let's keep accumulating
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return "", "", false
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} else if trimmed == "" {
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// saw whitespace only, so let's keep accumulating
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return "", "", false
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} else {
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// didn't see an opening tag, but we have content, so thinking was skipped
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s.state = thinkingState_ThinkingDone
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// note that we use the original content, not the trimmed one because we
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// don't want to eat any whitespace in the real content if there were no
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// thinking tags
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return "", s.acc.String(), false
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}
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case thinkingState_ThinkingStartedEatingWhitespace:
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trimmed := strings.TrimLeftFunc(s.acc.String(), unicode.IsSpace)
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s.acc.Reset()
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if trimmed == "" {
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return "", "", false
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} else {
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s.state = thinkingState_Thinking
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s.acc.WriteString(trimmed)
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return "", "", true
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}
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case thinkingState_Thinking:
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acc := s.acc.String()
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if strings.Contains(acc, s.ClosingTag) {
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split := strings.Split(acc, s.ClosingTag)
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thinking := split[0]
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remaining := strings.Join(split[1:], s.ClosingTag)
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remaining = strings.TrimLeftFunc(remaining, unicode.IsSpace)
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s.acc.Reset()
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if remaining == "" {
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s.state = thinkingState_ThinkingDoneEatingWhitespace
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} else {
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s.state = thinkingState_ThinkingDone
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}
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return thinking, remaining, false
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} else if overlapLen := overlap(acc, s.ClosingTag); overlapLen > 0 {
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thinking := acc[:len(acc)-overlapLen]
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remaining := acc[len(acc)-overlapLen:]
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s.acc.Reset()
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// keep track of the candidate closing tag. We have to buffer it until it
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// becomes disambiguated
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s.acc.WriteString(remaining)
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return thinking, "", false
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} else {
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// purely just thinking tokens, so we can return them
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s.acc.Reset()
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return acc, "", false
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}
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case thinkingState_ThinkingDoneEatingWhitespace:
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trimmed := strings.TrimLeftFunc(s.acc.String(), unicode.IsSpace)
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s.acc.Reset()
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// if we see non-whitespace, we're done eating the leading whitespace of the content
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if trimmed != "" {
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s.state = thinkingState_ThinkingDone
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}
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return "", trimmed, false
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case thinkingState_ThinkingDone:
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acc := s.acc.String()
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s.acc.Reset()
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return "", acc, false
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default:
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panic("unknown state")
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}
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}
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// longest overlap between suffix of s and prefix of delim
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func overlap(s, delim string) int {
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max := min(len(delim), len(s))
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for i := max; i > 0; i-- {
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if strings.HasSuffix(s, delim[:i]) {
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return i
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}
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}
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return 0
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}
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278
thinking/parser_test.go
Normal file
278
thinking/parser_test.go
Normal file
@@ -0,0 +1,278 @@
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package thinking
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import (
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"testing"
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)
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func TestExtractThinking(t *testing.T) {
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tests := []struct {
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in, wantContent, wantThink string
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}{
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{
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in: "<think> internal </think> world",
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wantThink: "internal ",
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wantContent: "world",
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},
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{
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in: "<think>a</think><think>b</think>c",
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wantThink: "a",
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wantContent: "<think>b</think>c",
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},
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{
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in: "no think",
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wantThink: "",
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wantContent: "no think",
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},
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}
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for i, tt := range tests {
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parser := Parser{
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OpeningTag: "<think>",
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ClosingTag: "</think>",
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}
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gotThinking, gotContent := parser.AddContent(tt.in)
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if gotContent != tt.wantContent || gotThinking != tt.wantThink {
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t.Errorf("case %d: got (%q,%q), want (%q,%q)", i, gotThinking, gotContent, tt.wantThink, tt.wantContent)
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}
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}
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}
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func TestThinkingStreaming(t *testing.T) {
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type step struct {
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input string
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wantThinking string
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wantContent string
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wantStateAfter thinkingState
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}
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cases := []struct {
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desc string
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skip bool
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steps []step
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}{
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{
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desc: "content without a thinking tag",
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steps: []step{
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{
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input: " abc",
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wantThinking: "",
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wantContent: " abc",
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wantStateAfter: thinkingState_ThinkingDone,
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},
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},
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},
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{
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desc: "content before a thinking tag nerfs the thinking tag",
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steps: []step{
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{
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input: " abc <think>def</think> ghi",
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wantThinking: "",
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wantContent: " abc <think>def</think> ghi",
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wantStateAfter: thinkingState_ThinkingDone,
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},
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},
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},
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{
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desc: "building up a thinking tag partially",
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steps: []step{
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{
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input: " <th",
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wantThinking: "",
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wantContent: "",
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wantStateAfter: thinkingState_LookingForOpening,
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},
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{
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input: "in",
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wantThinking: "",
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wantContent: "",
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wantStateAfter: thinkingState_LookingForOpening,
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},
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{
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input: "k>a",
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wantThinking: "a",
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wantContent: "",
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wantStateAfter: thinkingState_Thinking,
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},
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},
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},
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{
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desc: "partial closing tag",
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steps: []step{
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{
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input: "<think>abc</th",
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wantThinking: "abc",
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wantContent: "",
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wantStateAfter: thinkingState_Thinking,
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},
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{
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input: "ink>def",
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wantThinking: "",
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wantContent: "def",
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wantStateAfter: thinkingState_ThinkingDone,
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},
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},
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},
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{
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desc: "partial closing tag fakeout",
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steps: []step{
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{
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input: "<think>abc</th",
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wantThinking: "abc",
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wantContent: "",
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wantStateAfter: thinkingState_Thinking,
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},
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{
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input: "ing>def",
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wantThinking: "</thing>def",
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wantContent: "",
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wantStateAfter: thinkingState_Thinking,
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},
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{
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input: "ghi</thi",
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wantThinking: "ghi",
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wantContent: "",
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wantStateAfter: thinkingState_Thinking,
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},
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{
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input: "nk>jkl",
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wantThinking: "",
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wantContent: "jkl",
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wantStateAfter: thinkingState_ThinkingDone,
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},
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},
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},
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{
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desc: "whitespace after thinking tag",
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steps: []step{
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{
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input: " <think>abc</think>\n\ndef",
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wantThinking: "abc",
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wantContent: "def",
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wantStateAfter: thinkingState_ThinkingDone,
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},
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},
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},
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{
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desc: "whitespace after thinking tag (incremental)",
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steps: []step{
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{
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input: " <think>abc</think>",
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wantThinking: "abc",
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wantContent: "",
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wantStateAfter: thinkingState_ThinkingDoneEatingWhitespace,
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},
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{
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input: "\n\ndef",
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wantThinking: "",
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wantContent: "def",
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wantStateAfter: thinkingState_ThinkingDone,
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},
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},
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},
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{
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desc: "whitespace after thinking tag with content and more whitespace",
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steps: []step{
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{
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input: " <think>abc</think>\n\ndef ",
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wantThinking: "abc",
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wantContent: "def ",
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wantStateAfter: thinkingState_ThinkingDone,
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},
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{
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input: " ghi",
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wantThinking: "",
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wantContent: " ghi",
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wantStateAfter: thinkingState_ThinkingDone,
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},
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},
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},
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{
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desc: "token by token",
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steps: []step{
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{
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input: "<think>",
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wantThinking: "",
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wantContent: "",
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wantStateAfter: thinkingState_ThinkingStartedEatingWhitespace,
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},
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{
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input: "\n",
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wantThinking: "",
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wantContent: "",
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wantStateAfter: thinkingState_ThinkingStartedEatingWhitespace,
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},
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{
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input: "</think>",
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wantThinking: "",
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wantContent: "",
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wantStateAfter: thinkingState_ThinkingDoneEatingWhitespace,
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},
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{
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input: "\n\n",
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wantThinking: "",
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wantContent: "",
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wantStateAfter: thinkingState_ThinkingDoneEatingWhitespace,
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},
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{
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input: "Hi",
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wantThinking: "",
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wantContent: "Hi",
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wantStateAfter: thinkingState_ThinkingDone,
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},
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{
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input: " there",
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wantThinking: "",
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wantContent: " there",
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wantStateAfter: thinkingState_ThinkingDone,
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},
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},
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},
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{
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desc: "leading thinking whitespace",
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steps: []step{
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{
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input: " <think> \t ",
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wantThinking: "",
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wantContent: "",
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wantStateAfter: thinkingState_ThinkingStartedEatingWhitespace,
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},
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{
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input: " these are some ",
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wantThinking: "these are some ",
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wantContent: "",
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wantStateAfter: thinkingState_Thinking,
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},
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{
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input: "thoughts </think> ",
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wantThinking: "thoughts ",
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wantContent: "",
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wantStateAfter: thinkingState_ThinkingDoneEatingWhitespace,
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},
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{
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input: " more content",
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wantThinking: "",
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wantContent: "more content",
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wantStateAfter: thinkingState_ThinkingDone,
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},
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},
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},
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}
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for _, c := range cases {
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parser := Parser{
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OpeningTag: "<think>",
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ClosingTag: "</think>",
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}
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if c.skip {
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continue
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}
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for i, step := range c.steps {
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thinking, content := parser.AddContent(step.input)
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if content != step.wantContent || thinking != step.wantThinking {
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t.Errorf("case %q (step %d): got (%q,%q), want (%q,%q)", c.desc, i, content, thinking, step.wantContent, step.wantThinking)
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}
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if parser.state != step.wantStateAfter {
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t.Errorf("case %q (step %d): got state %s, want %s", c.desc, i, parser.state, step.wantStateAfter)
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}
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}
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}
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}
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134
thinking/template.go
Normal file
134
thinking/template.go
Normal file
@@ -0,0 +1,134 @@
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package thinking
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import (
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"strings"
|
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"text/template"
|
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"text/template/parse"
|
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)
|
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func templateVisit(n parse.Node, enterFn func(parse.Node) bool, exitFn func(parse.Node)) {
|
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if n == nil {
|
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return
|
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}
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shouldContinue := enterFn(n)
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if !shouldContinue {
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return
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}
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switch x := n.(type) {
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case *parse.ListNode:
|
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for _, c := range x.Nodes {
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templateVisit(c, enterFn, exitFn)
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}
|
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case *parse.BranchNode:
|
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if x.Pipe != nil {
|
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templateVisit(x.Pipe, enterFn, exitFn)
|
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}
|
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if x.List != nil {
|
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templateVisit(x.List, enterFn, exitFn)
|
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}
|
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if x.ElseList != nil {
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templateVisit(x.ElseList, enterFn, exitFn)
|
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}
|
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case *parse.ActionNode:
|
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templateVisit(x.Pipe, enterFn, exitFn)
|
||||
case *parse.WithNode:
|
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templateVisit(&x.BranchNode, enterFn, exitFn)
|
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case *parse.RangeNode:
|
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templateVisit(&x.BranchNode, enterFn, exitFn)
|
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case *parse.IfNode:
|
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templateVisit(&x.BranchNode, enterFn, exitFn)
|
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case *parse.TemplateNode:
|
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templateVisit(x.Pipe, enterFn, exitFn)
|
||||
case *parse.PipeNode:
|
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for _, c := range x.Cmds {
|
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templateVisit(c, enterFn, exitFn)
|
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}
|
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case *parse.CommandNode:
|
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for _, a := range x.Args {
|
||||
templateVisit(a, enterFn, exitFn)
|
||||
}
|
||||
// text, field, number, etc. are leaves – nothing to recurse into
|
||||
}
|
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if exitFn != nil {
|
||||
exitFn(n)
|
||||
}
|
||||
}
|
||||
|
||||
// InferTags uses a heuristic to infer the tags that surround thinking traces:
|
||||
// We look for a range node that iterates over "Messages" and then look for a
|
||||
// reference to "Thinking" like `{{.Thinking}}`. We then go up to the nearest
|
||||
// ListNode and take the first and last TextNodes as the opening and closing
|
||||
// tags.
|
||||
func InferTags(t *template.Template) (string, string) {
|
||||
ancestors := []parse.Node{}
|
||||
|
||||
openingTag := ""
|
||||
closingTag := ""
|
||||
|
||||
enterFn := func(n parse.Node) bool {
|
||||
ancestors = append(ancestors, n)
|
||||
|
||||
switch x := n.(type) {
|
||||
case *parse.FieldNode:
|
||||
if len(x.Ident) > 0 && x.Ident[0] == "Thinking" {
|
||||
var mostRecentRange *parse.RangeNode
|
||||
for i := len(ancestors) - 1; i >= 0; i-- {
|
||||
if r, ok := ancestors[i].(*parse.RangeNode); ok {
|
||||
mostRecentRange = r
|
||||
break
|
||||
}
|
||||
}
|
||||
if mostRecentRange == nil || !rangeUsesField(mostRecentRange, "Messages") {
|
||||
return true
|
||||
}
|
||||
|
||||
// TODO(drifkin): to be more robust, check that it's in the action
|
||||
// part, not the `if`'s pipeline part. We do match on the nearest list
|
||||
// that starts and ends with text nodes, which makes this not strictly
|
||||
// necessary for our heuristic
|
||||
|
||||
// go up to the nearest ancestor that is a *parse.ListNode
|
||||
for i := len(ancestors) - 1; i >= 0; i-- {
|
||||
if l, ok := ancestors[i].(*parse.ListNode); ok {
|
||||
firstNode := l.Nodes[0]
|
||||
if t, ok := firstNode.(*parse.TextNode); ok {
|
||||
openingTag = strings.TrimSpace(t.String())
|
||||
}
|
||||
lastNode := l.Nodes[len(l.Nodes)-1]
|
||||
if t, ok := lastNode.(*parse.TextNode); ok {
|
||||
closingTag = strings.TrimSpace(t.String())
|
||||
}
|
||||
|
||||
break
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return true
|
||||
}
|
||||
|
||||
exitFn := func(n parse.Node) {
|
||||
ancestors = ancestors[:len(ancestors)-1]
|
||||
}
|
||||
|
||||
templateVisit(t.Root, enterFn, exitFn)
|
||||
|
||||
return openingTag, closingTag
|
||||
}
|
||||
|
||||
// checks to see if the given field name is present in the pipeline of the given range node
|
||||
func rangeUsesField(rangeNode *parse.RangeNode, field string) bool {
|
||||
found := false
|
||||
enterFn := func(n parse.Node) bool {
|
||||
switch x := n.(type) {
|
||||
case *parse.FieldNode:
|
||||
if x.Ident[0] == field {
|
||||
found = true
|
||||
}
|
||||
}
|
||||
return true
|
||||
}
|
||||
templateVisit(rangeNode.BranchNode.Pipe, enterFn, nil)
|
||||
return found
|
||||
}
|
||||
130
thinking/template_test.go
Normal file
130
thinking/template_test.go
Normal file
@@ -0,0 +1,130 @@
|
||||
package thinking
|
||||
|
||||
import (
|
||||
"testing"
|
||||
"text/template"
|
||||
)
|
||||
|
||||
func TestInferThinkingTags(t *testing.T) {
|
||||
cases := []struct {
|
||||
desc string
|
||||
tmplString string
|
||||
wantOpeningTag string
|
||||
wantClosingTag string
|
||||
}{
|
||||
{
|
||||
desc: "basic",
|
||||
tmplString: `
|
||||
{{ if .Thinking}}
|
||||
/think
|
||||
{{ end }}
|
||||
{{- range $i, $_ := .Messages }}
|
||||
{{- $last := eq (len (slice $.Messages $i)) 1 -}}
|
||||
{{ if and $last .Thinking }}
|
||||
<think>{{ .Thinking }}</think>
|
||||
{{ end }}
|
||||
{{ end }}
|
||||
`,
|
||||
wantOpeningTag: "<think>",
|
||||
wantClosingTag: "</think>",
|
||||
},
|
||||
{
|
||||
desc: "doubly nested range",
|
||||
tmplString: `
|
||||
{{ if .Thinking}}
|
||||
/think
|
||||
{{ end }}
|
||||
{{- range $i, $_ := .Messages }}
|
||||
{{- range $j, $_ := .NotMessages }}
|
||||
{{- $last := eq (len (slice $.Messages $i)) 1 -}}
|
||||
{{ if and $last .Thinking }}
|
||||
<think>{{ .Thinking }}</think>
|
||||
{{ end }}
|
||||
{{ end }}
|
||||
{{ end }}
|
||||
`,
|
||||
wantOpeningTag: "",
|
||||
wantClosingTag: "",
|
||||
},
|
||||
{
|
||||
desc: "whitespace is trimmed",
|
||||
tmplString: `
|
||||
{{ if .Thinking}}
|
||||
/think
|
||||
{{ end }}
|
||||
{{- range $i, $_ := .Messages }}
|
||||
{{- $last := eq (len (slice $.Messages $i)) 1 -}}
|
||||
{{ if and $last .Thinking }}
|
||||
Some text before {{ .Thinking }} Some text after
|
||||
{{ end }}
|
||||
{{ end }}
|
||||
`,
|
||||
wantOpeningTag: "Some text before",
|
||||
wantClosingTag: "Some text after",
|
||||
},
|
||||
{
|
||||
desc: "qwen3",
|
||||
tmplString: `
|
||||
{{- if or .System .Tools .Thinking }}<|im_start|>system
|
||||
{{- if .System }}
|
||||
{{ .System }}
|
||||
{{- end }}
|
||||
{{- if .Tools }}
|
||||
|
||||
# Tools
|
||||
|
||||
You may call one or more functions to assist with the user query.
|
||||
|
||||
You are provided with function signatures within <tools></tools> XML tags:
|
||||
<tools>
|
||||
{{- range .Tools }}
|
||||
{"type": "function", "function": {{ .Function }}}
|
||||
{{- end }}
|
||||
</tools>
|
||||
|
||||
For each function call, return a json object with function name and arguments within <tool_call></tool_call> XML tags:
|
||||
<tool_call>
|
||||
{"name": <function-name>, "arguments": <args-json-object>}
|
||||
</tool_call>
|
||||
{{- end }}
|
||||
{{- if .Thinking }}
|
||||
/think
|
||||
{{- else }}
|
||||
/no_think
|
||||
{{- end }}<|im_end|>
|
||||
{{ end }}
|
||||
{{- range $i, $_ := .Messages }}
|
||||
{{- $last := eq (len (slice $.Messages $i)) 1 -}}
|
||||
{{- if eq .Role "user" }}<|im_start|>user
|
||||
{{ .Content }}<|im_end|>
|
||||
{{ else if eq .Role "assistant" }}<|im_start|>assistant
|
||||
{{ if and $last .Thinking }}
|
||||
<think>{{ .Thinking }}</think>
|
||||
{{ end }}
|
||||
{{ if .Content }}{{ .Content }}
|
||||
{{- else if .ToolCalls }}<tool_call>
|
||||
{{ range .ToolCalls }}{"name": "{{ .Function.Name }}", "arguments": {{ .Function.Arguments }}}
|
||||
{{ end }}</tool_call>
|
||||
{{- end }}{{ if not $last }}<|im_end|>
|
||||
{{ end }}
|
||||
{{- else if eq .Role "tool" }}<|im_start|>user
|
||||
<tool_response>
|
||||
{{ .Content }}
|
||||
</tool_response><|im_end|>
|
||||
{{ end }}
|
||||
{{- if and (ne .Role "assistant") $last }}<|im_start|>assistant
|
||||
{{ end }}
|
||||
{{- end }}
|
||||
`,
|
||||
wantOpeningTag: "<think>",
|
||||
wantClosingTag: "</think>",
|
||||
},
|
||||
}
|
||||
for _, c := range cases {
|
||||
tmpl := template.Must(template.New("test").Parse(c.tmplString))
|
||||
openingTag, closingTag := InferTags(tmpl)
|
||||
if openingTag != c.wantOpeningTag || closingTag != c.wantClosingTag {
|
||||
t.Errorf("case %q: got (%q,%q), want (%q,%q)", c.desc, openingTag, closingTag, c.wantOpeningTag, c.wantClosingTag)
|
||||
}
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user