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A collection of safe functions for use with Go's text/template package

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Haven

Overview

Haven is a collection of safe template functions for use with Go's text/template package. "Safe" refers to safe execution on the host system. These functions provide no access to the host filesystem, resources, environment variables, etc.

Many of the functions are thin wrappers around existing standard library functions. However, the primary operand is always the last parameter, which enables chained pipelining. Example: haven.Split and haven.Join reverse the parameters of strings.Split and strings.Join, making the following possible: {{"dogs,cats,horses" | Split "," | Join "\n" }}.

Haven is a work-in-progress. Contributions and suggestions are welcome!

API Promise

Minor breaking changes may occur prior to the 1.0 release. After the 1.0 release, the API is guaranteed to remain backwards compatible.

Function By Category

Please see the godocs for usage details.

String and String Slice Manipulation

Contains, ContainsAny, Count, Fields, HasPrefix, HasSuffix, Index, IndexAny, Join, LastIndex, LastIndexAny, Lines, Quote, Repeat, Replace, Split, SplitAfter, SplitAfterN, SplitN, Title, ToLower, ToUpper, Trim, TrimLeft, TrimPrefix, TrimRight, TrimSpace, TrimSuffix, Unquote, Grep, Head, Intersect, Reverse, Seq, Shuffle, Slice, Sort, Tail, Union

Map Manipulation

Absent. I would love help in compiling a simple, flexible set of map functions that don't require too much magic. The main issue comes down to type handling. Should functions operate only on map[string]string, or should map[string]interface{} be supported for nested maps and/or non-string types. What's the right balance of simplicity and reflection?

Date and Time

Now, ParseTime

Regular Expressions

Matches, CompileRegex, CompileERE, QuoteRegex

Encoding and Parsing

Base64Encode, Base64Decode, ParseBool, ParseInt, ParseFloat, ParseURL

Math

Abs, Add, Subtract, Divide, Modulo, Multiply, Min, Max

Authors

Bob Ziuchkovski (@bobziuchkovski)

License (MIT)

Copyright (c) 2016 Bob Ziuchkovski

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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