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Add regexp raw pattern API #1061

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9 changes: 7 additions & 2 deletions query/query.go
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Original file line number Diff line number Diff line change
Expand Up @@ -79,6 +79,11 @@ type Regexp struct {
CaseSensitive bool
}

// RegexpString returns the marshaled raw regexp pattern for q.
func (q *Regexp) RegexpString() string {
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@keegancsmith keegancsmith May 14, 2026

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This change makes sense no matter what. We want a way to get at this. I do think in Sourcegraph though we want to be able to directly use syntaxutil.RegexpString. We had a need to marshal the string for observability, which is outside of the need of marshalling a query.Regexp

return syntaxutil.RegexpString(q.Regexp)
}

func (q *Regexp) String() string {
pref := ""
if q.FileName {
Expand All @@ -87,7 +92,7 @@ func (q *Regexp) String() string {
if q.CaseSensitive {
pref = "case_" + pref
}
return fmt.Sprintf("%sregex:%q", pref, syntaxutil.RegexpString(q.Regexp))
return fmt.Sprintf("%sregex:%q", pref, q.RegexpString())
}

// gobRegexp wraps Regexp to make it gob-encodable/decodable. Regexp contains syntax.Regexp, which
Expand All @@ -100,7 +105,7 @@ type gobRegexp struct {

// GobEncode implements gob.Encoder.
func (q Regexp) GobEncode() ([]byte, error) {
gobq := gobRegexp{Regexp: q, RegexpString: syntaxutil.RegexpString(q.Regexp)}
gobq := gobRegexp{Regexp: q, RegexpString: q.RegexpString()}
gobq.Regexp.Regexp = nil // can't be gob-encoded/decoded
return json.Marshal(gobq)
}
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22 changes: 22 additions & 0 deletions query/regexp_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -101,3 +101,25 @@ func TestOptimize(t *testing.T) {
})
}
}

func TestRegexpRegexpString(t *testing.T) {
tests := []struct {
in string
want string
}{
{in: `abc`, want: `abc`},
{in: `a.*b`, want: `a(?-s:.)*b`},
}

for _, tt := range tests {
t.Run(tt.in, func(t *testing.T) {
q := &Regexp{Regexp: mustParseRE(tt.in)}
if got := q.RegexpString(); got != tt.want {
t.Fatalf("RegexpString(%q) = %q, want %q", tt.in, got, tt.want)
}
if got := q.String(); got == tt.want {
t.Fatalf("String(%q) = raw pattern %q, want query formatting", tt.in, got)
}
})
}
}
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