80 lines
2.7 KiB
Go
80 lines
2.7 KiB
Go
// Copyright 2026 Alibaba Group
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package handlers
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import (
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"github.com/DingTalk-Real-AI/dingtalk-workspace-cli/internal/pipeline"
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"github.com/DingTalk-Real-AI/dingtalk-workspace-cli/pkg/cmdutil"
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)
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// ParamNameHandler performs fuzzy correction on flag names that are
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// not recognised after alias normalisation. It uses Levenshtein edit
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// distance to find the closest known flag name, with a conservative
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// threshold to avoid false positives.
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//
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// Correction rules:
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// - Edit distance must be ≤ maxEditDistance (default 2).
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// - The match must be unambiguous (exactly one candidate within threshold).
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// - Very short flag names (≤ 3 chars) use a tighter threshold of 1.
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//
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// This handler should run after AliasHandler in the PreParse phase
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// so that obvious normalisation (camelCase → kebab-case) is already
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// done and fuzzy matching only handles genuine near-misses.
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type ParamNameHandler struct{}
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func (ParamNameHandler) Name() string { return "paramname" }
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func (ParamNameHandler) Phase() pipeline.Phase { return pipeline.PreParse }
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func (ParamNameHandler) Handle(ctx *pipeline.Context) error {
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if len(ctx.Args) == 0 || len(ctx.FlagSpecs) == 0 {
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return nil
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}
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known := buildFlagSet(ctx.FlagSpecs)
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names := make([]string, 0, len(ctx.FlagSpecs))
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for _, spec := range ctx.FlagSpecs {
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if spec.Name != "" {
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names = append(names, spec.Name)
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}
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}
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result := make([]string, 0, len(ctx.Args))
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for i, arg := range ctx.Args {
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if arg == "--" {
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result = append(result, ctx.Args[i:]...)
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break
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}
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if bare, _, isFlag := splitFlagToken(arg); isFlag && ctx.IsFlagProtected(cmdutil.Morph(bare)) {
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result = append(result, arg)
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continue
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}
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rewritten, ok := tryFuzzyMatch(arg, known, names)
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if ok {
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ctx.AddCorrection("paramname", pipeline.PreParse, rewritten, arg, rewritten, "fuzzy")
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result = append(result, rewritten)
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} else {
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result = append(result, arg)
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}
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}
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ctx.Args = result
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return nil
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}
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// tryFuzzyMatch attempts to correct an unrecognised "--flag" token by
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// finding the closest known flag name within the edit distance threshold.
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func tryFuzzyMatch(arg string, known map[string]bool, candidates []string) (string, bool) {
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return pipeline.FuzzyMatchFlag(arg, known, candidates)
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}
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