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translate done: 20171222 Improve your code searching skills with pss.md
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translating by lujun9972
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Improve your code searching skills with pss
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======
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Searching a code base is a part of every day developer activities. From fixing a bug, to learning a new code base or checking how to call an api, being able to quickly navigate your way into a code base is a great skill to have. Luckily, we have dedicated tools to search code. Let's see how to install and use one of them - [**pss**][1].
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### What is pss?
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**pss** is a command line tool that helps searching inside source code file. **pss** searches recursively within a directory tree, knows which extensions and file names to search and which to ignore, automatically skips directories you wouldn't want to search in (for example `.svn` or `.git`), colors its output in a helpful way, and much more.
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### Installing pss
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Install **pss** on Fedora with the following command:
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```
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$ dnf install pss
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```
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Once the installation is complete you can now call **pss** in your terminal
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```
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$ pss
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```
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Calling **pss** without any argument or with the -h flag will print a detailed usage message.
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### Usage examples
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Now that you have installed **pss** let 's go through some Usage examples.
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```
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$ pss foo
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```
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This command simply looks for `foo`. You can be more restrictive and ask pss to look for `foo` only in python files:
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```
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$ pss foo --py
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```
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and for `bar` in all other files:
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```
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$ pss bar --nopy
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```
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Additionally, **pss** supports most of the well known source file types, to get the full list execute:
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```
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$ pss --help-types
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```
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You can also ignore some directories. Note that by default, **pss** will ignore directories like .git, __pycache__, .metadata and more.
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```
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$ pss foo --py --ignore-dir=dist
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```
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Furthermore, **pss** also gives you the possibility to get more context from your search using the following :
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```
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$ pss -A 5 foo
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```
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will display 5 line of context after the matching word
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```
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$ pss -B 5 foo
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```
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will display 5 line of context before the matching word
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```
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$ pss -C 5 foo
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```
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will display 5 line of context before & after the matching word
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If you would like to learn how to use **pss ** with regular expression and other options, more examples are available [here][2].
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--------------------------------------------------------------------------------
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via: https://fedoramagazine.org/improve-code-searching-skills-pss/
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作者：[Author Archive;Author Website;Clément Verna][a]
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译者：[lujun9972](https://github.com/lujun9972)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]:https://fedoramagazine.org
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[1]:https://github.com/eliben/pss
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[2]:https://github.com/eliben/pss/wiki/Usage-samples
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使用 pss 提升你的代码搜索能力
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======
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搜索代码库是开发者每天都要做的事情。从修改 bug 到学习新代码，或者查看如何调用某个 api，能快速在代码库中导航的能力都是一大助力。幸运的是，我们有专门的工具来搜索代码。[**pss**][1] 就是其中一个工具，让我们来看看如何安装和使用它吧。
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### 什么是 pss？
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**pss** 是一个帮你在源代码文件中进行搜索的命令行工具。**pss** 递归地在目录树中进行搜索，它能自动根据文件名和后缀判断哪些文件需要搜索，哪些文件不需搜索，并且会自动跳过那些你不会想搜索的目录(比如 `.svn` 和 `.git`)，还能用色彩渲染输出以方便人们阅读，以及其他很多功能。
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### 安装 pss
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使用下面命令在 Fedora 上安装 **pss**：
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```
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$ dnf install pss
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```
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安装好后就能在终端调用 **pss** 了
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```
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$ pss
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```
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不带参数调用 **pss** 或者带上 `-h` 标志会输出详细的使用说明。
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### 使用案例
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现在你安装好 **pss** 了，下面来看一些例子吧。
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```
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$ pss foo
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```
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该命令只是简单的搜索 `foo`。你也可以限制 pss 让它只在 python 文件中搜索 `foo`：
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```
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$ pss foo --py
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```
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还能在非 python 文件中搜索 `bar`：
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```
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$ pss bar --nopy
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```
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而且，**pss** 支持大多数常见的源代码文件类型，要获取完整的支持列表，执行：
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```
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$ pss --help-types
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```
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你还能指定忽略某些目录不进行搜索。默认情况下，**pss** 会忽略类似 `.git`，`__pycache__`，`.metadata` 等目录。
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```
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$ pss foo --py --ignore-dir=dist
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```
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此外，**pss** 还能显示搜索结果的上下文：
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```
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$ pss -A 5 foo
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```
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会现实匹配结果的后面 5 行内容
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```
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$ pss -B 5 foo
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```
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会现实匹配结果的前面 5 行内容
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```
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$ pss -C 5 foo
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```
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会现实匹配结果的前后各 5 行内容
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如果你想知道如何使用 **pss ** 进行正则表达式搜索以及它的其他选项的话，可以在[这里 ][2] 看到更多的例子。
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--------------------------------------------------------------------------------
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via: https://fedoramagazine.org/improve-code-searching-skills-pss/
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作者：[Author Archive;Author Website;Clément Verna][a]
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译者：[lujun9972](https://github.com/lujun9972)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]:https://fedoramagazine.org
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[1]:https://github.com/eliben/pss
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[2]:https://github.com/eliben/pss/wiki/Usage-samples
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