1 files changed, 66 insertions, 0 deletions
diff --git a/common/herrors/line_number_extractors.go b/common/herrors/line_number_extractors.go
new file mode 100644
index 000000000..93969b967
--- /dev/null
+++ b/common/herrors/line_number_extractors.go
@@ -0,0 +1,66 @@
+// Copyright 2018 The Hugo Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitatio	ns under the License.
+
+package herrors
+
+import (
+	"regexp"
+	"strconv"
+)
+
+var lineNumberExtractors = []lineNumberExtractor{
+	// Template/shortcode parse errors
+	newLineNumberErrHandlerFromRegexp(".*:(\\d+):(\\d*):"),
+	newLineNumberErrHandlerFromRegexp(".*:(\\d+):"),
+
+	// TOML parse errors
+	newLineNumberErrHandlerFromRegexp(".*Near line (\\d+)(\\s.*)"),
+
+	// YAML parse errors
+	newLineNumberErrHandlerFromRegexp("line (\\d+):"),
+
+	// i18n bundle errors
+	newLineNumberErrHandlerFromRegexp("\\((\\d+),\\s(\\d*)"),
+}
+
+type lineNumberExtractor func(e error) (int, int)
+
+func newLineNumberErrHandlerFromRegexp(expression string) lineNumberExtractor {
+	re := regexp.MustCompile(expression)
+	return extractLineNo(re)
+}
+
+func extractLineNo(re *regexp.Regexp) lineNumberExtractor {
+	return func(e error) (int, int) {
+		if e == nil {
+			panic("no error")
+		}
+		col := 1
+		s := e.Error()
+		m := re.FindStringSubmatch(s)
+		if len(m) >= 2 {
+			lno, _ := strconv.Atoi(m[1])
+			if len(m) > 2 {
+				col, _ = strconv.Atoi(m[2])
+			}
+
+			if col <= 0 {
+				col = 1
+			}
+
+			return lno, col
+		}
+
+		return -1, col
+	}
+}