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129 lines
4.3 KiB
129 lines
4.3 KiB
[](https://github.com/magiconair/properties/releases)
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[](https://travis-ci.org/magiconair/properties)
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[](https://circleci.com/gh/magiconair/properties)
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[](https://raw.githubusercontent.com/magiconair/properties/master/LICENSE)
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[](http://godoc.org/github.com/magiconair/properties)
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# Overview
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#### Please run `git pull --tags` to update the tags. See [below](#updated-git-tags) why.
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properties is a Go library for reading and writing properties files.
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It supports reading from multiple files or URLs and Spring style recursive
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property expansion of expressions like `${key}` to their corresponding value.
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Value expressions can refer to other keys like in `${key}` or to environment
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variables like in `${USER}`. Filenames can also contain environment variables
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like in `/home/${USER}/myapp.properties`.
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Properties can be decoded into structs, maps, arrays and values through
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struct tags.
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Comments and the order of keys are preserved. Comments can be modified
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and can be written to the output.
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The properties library supports both ISO-8859-1 and UTF-8 encoded data.
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Starting from version 1.3.0 the behavior of the MustXXX() functions is
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configurable by providing a custom `ErrorHandler` function. The default has
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changed from `panic` to `log.Fatal` but this is configurable and custom
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error handling functions can be provided. See the package documentation for
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details.
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Read the full documentation on [](http://godoc.org/github.com/magiconair/properties)
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## Getting Started
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```go
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import (
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"flag"
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"github.com/magiconair/properties"
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)
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func main() {
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// init from a file
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p := properties.MustLoadFile("${HOME}/config.properties", properties.UTF8)
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// or multiple files
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p = properties.MustLoadFiles([]string{
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"${HOME}/config.properties",
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"${HOME}/config-${USER}.properties",
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}, properties.UTF8, true)
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// or from a map
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p = properties.LoadMap(map[string]string{"key": "value", "abc": "def"})
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// or from a string
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p = properties.MustLoadString("key=value\nabc=def")
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// or from a URL
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p = properties.MustLoadURL("http://host/path")
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// or from multiple URLs
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p = properties.MustLoadURL([]string{
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"http://host/config",
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"http://host/config-${USER}",
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}, true)
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// or from flags
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p.MustFlag(flag.CommandLine)
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// get values through getters
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host := p.MustGetString("host")
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port := p.GetInt("port", 8080)
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// or through Decode
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type Config struct {
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Host string `properties:"host"`
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Port int `properties:"port,default=9000"`
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Accept []string `properties:"accept,default=image/png;image;gif"`
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Timeout time.Duration `properties:"timeout,default=5s"`
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}
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var cfg Config
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if err := p.Decode(&cfg); err != nil {
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log.Fatal(err)
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}
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}
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```
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## Installation and Upgrade
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```
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$ go get -u github.com/magiconair/properties
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```
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## License
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2 clause BSD license. See [LICENSE](https://github.com/magiconair/properties/blob/master/LICENSE) file for details.
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## ToDo
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* Dump contents with passwords and secrets obscured
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## Updated Git tags
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#### 13 Feb 2018
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I realized that all of the git tags I had pushed before v1.7.5 were lightweight tags
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and I've only recently learned that this doesn't play well with `git describe` 😞
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I have replaced all lightweight tags with signed tags using this script which should
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retain the commit date, name and email address. Please run `git pull --tags` to update them.
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Worst case you have to reclone the repo.
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```shell
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#!/bin/bash
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tag=$1
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echo "Updating $tag"
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date=$(git show ${tag}^0 --format=%aD | head -1)
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email=$(git show ${tag}^0 --format=%aE | head -1)
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name=$(git show ${tag}^0 --format=%aN | head -1)
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GIT_COMMITTER_DATE="$date" GIT_COMMITTER_NAME="$name" GIT_COMMITTER_EMAIL="$email" git tag -s -f ${tag} ${tag}^0 -m ${tag}
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```
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I apologize for the inconvenience.
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Frank
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