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Style guide

This page lists specific formatting instructions for tldr pages.

Layout

The basic format of each page should match the following template and have at most 8 command examples:

# command name

> Short, snappy command description.
> Preferably one line; two are acceptable if necessary.
> More information: <https://example.com/command_name/help/page>.

- Code description:

`command_name options`

- Code description:

`command_name options`

...

Example:

# krita

> Krita is a sketching and painting program designed for digital artists.
> See also: `gimp`.
> More information: <https://docs.krita.org/en/reference_manual/linux_command_line.html>.

- Start Krita:

`krita`

- Open specific files:

`krita {{path/to/image1 path/to/image2 ...}}`

- Start without a splash screen:

`krita --nosplash`

- Start with a specific workspace:

`krita --workspace {{Animation}}`

- Start in fullscreen mode:

`krita --fullscreen`

💡 The help page can be any documentation/project/tutorial page, not just a man page, but documentation pages are preferred.

There is a linter that enforces the format above. It is run automatically on every pull request, but you may install it to test your contributions locally before submitting them:

npm install --global tldr-lint
tldr-lint path/to/tldr_page.md

For other ways to use tldr-lint, such as linting an entire directory, check out (what else!) tldr tldr-lint. Alternatively, you can also use its alias tldrl.

Your client may be able to preview a page locally using the --render flag:

tldr --render path/to/tldr_page.md

Aliases

If a command can be called with alternative names (like vim can be called by vi), alias pages can be created to point the user to the original command name.

# command_name

> This command is an alias of `original-command-name`.
> More information: <https://example.com/original/command/help/page>.

- View documentation for the original command:

`tldr original_command_name`

Example:

# vi

> This command is an alias of `vim`.

- View documentation for the original command:

`tldr vim`

Pre-translated alias page templates can be found here.

Option syntax

Use GNU-style long options (like --help rather than -h) when they are cross-platform compatible (intended to work the same across multiple platforms).
In other cases, use short options (like -h).

Placeholder syntax

User-provided values should use the {{placeholder}} syntax in order to allow tldr clients to highlight them.

Keep the following guidelines in mind when choosing placeholders:

Naming

Use short but descriptive placeholders, such as {{path/to/source_file}} or {{path/to/wallet.txt}}.
Use snake_case for multi-word placeholders.
Use a generic placeholder rather than an actual value where a generic placeholder is available (but there is an exception to this listed below). For example, use iostat {{1..infinity}} rather than iostat {{2}}.
If there are several consecutive placeholders of the same type which don't allow adding arbitrary text in them (ranges), then instead of generic placeholders use descriptive ones. For example prefer input swipe {{x_position}} {{y_position}} {{x_position}} {{y_position}} {{seconds}} instead of input swipe {{-infinity..infinity}} {{-infinity..infinity}} {{-infinity..infinity}} {{-infinity..infinity}} {{1..infinity}}.

Range syntax

All borders of integer and float ranges get included. If you want to exclude the border, then use incremented or decremented values to do it: {{1..5}} == [1-6).

Use {{from..to}} syntax for closed ranges.
Use {{-n..to}} or {{from..n}} syntax for integer partially closed ranges where n is a keyword signifying the minimum or maximum range value e.g. {{1..n}} - 1 or greater values.
Use {{integer}} syntax for values where any integer is valid.
Use {{float}} syntax for values where any float is valid.

Paths

Use {{filename}} when just file name is expected.
For any reference to paths of files or directories, use the format {{path/to/<placeholder>}}, except when the location is implicit.
When the path cannot be relative, but has to start at the root of the filesystem, prefix it with a slash, such as get {{/path/to/remote_file}}.
In case of a possible reference both to a file or a directory, use {{path/to/file_or_directory}}.

Extensions

If a particular extension is expected for the file, append it. For example, unrar x {{path/to/compressed.rar}}.
In case a generic extension is needed, use {{.ext}}, but only if an extension is required. For instance, in find.md's example "Find files by extension" (find {{path/to/root}} -name '{{*.ext}}') using {{*.ext}} explains the command without being unnecessarily specific; while in wc -l {{path/to/file}} using {{path/to/file}} (without extension) is sufficient.

Grouping placeholders

If a command can take 0 or more arguments of the same kind, use an ellipsis: {{placeholder1 placeholder2 ...}}. For instance, if multiple paths are expected {{path/to/directory1 path/to/directory2 ...}} can be used.
If a command can take 0 or more arguments of different kinds, use an ellipsis: {{placeholder1|placeholder2|...}}. If there are more than 5 possible values use |... after the last item.
It's impossible to restrict the minimum or (and) maximum placeholder count via ellipsis.

It's up to the program to decide how to handle duplicating values, provided syntax tells no info about whether items are mutually exclusive or not.

Special cases

If a command performs irreversible changes to a file system or devices, write every example in a way that cannot be copy pasted thoughtlessly. For example, instead of ddrescue --force --no-scrape /dev/sda /dev/sdb write ddrescue --force --no-scrape {{/dev/sdX}} {{/dev/sdY}} and use the {{/dev/sdXY}} placeholder for block devices instead of /dev/sda1.

In general, placeholders should make it as intuitive as possible to figure out how to use the command and fill it in with values.

Technical wording on description lines should use the backtick syntax. Use backticks on the following:

Paths, ex. package.json, /etc/package.json.
Extensions, ex. .dll.
Commands, ex. ls.

Imperative Mood

Example descriptions have to be phrased in imperative mood.
For example, use List all files instead of Listing all files or File listing.
This also applies to all translations by default unless otherwise specified in the language-specific section below.

Serial Comma

When declaring a list of 3 or more items, use a serial comma, also known as the Oxford comma, since omitting it can create ambiguity.

Delete the Git branches, tags and remotes.

The example above does not use a serial comma, so this could mean one of two things:

Delete the Git branches named tags and remotes.
Delete all of the following: Git branches, Git tags, and Git remotes.

This can be resolved by inserting a comma before the "and" or "or" in the final element in the list.

Delete the Git branches, tags, and remotes.

Language-Specific Rules

Chinese-Specific Rules

When Chinese words, Latin words and Arabic numerals are written in the same sentence, more attention must be paid to copywriting.

The following guidelines are applied to Chinese (zh) and traditional Chinese (zh_TW) pages:

Place one space before/after English words and numbers.

For example, use 列出所有 docker 容器 rather than 列出所有docker容器.
For example, use 宽度为 50 个字 rather than 宽度为50个字.

Place one space between numbers and units except degrees and percentages.

For example, use 容量 50 MB rather than 容量 50MB.
For instances of degree and percentage, use 50°C and 50% rather than 50 °C and 50 %.

No additional spaces before/after full-width punctuations.

For example, use 开启 shell，进入交互模式 rather than 开启 shell ，进入交互模式

Use full-width punctuations except for long Latin clauses.

For example, use 嗨，你好。 rather than 嗨, 你好.

Use a half-width punctuation to end a sentence when the last character is half-width.

For example, use 将代码转化为 Python 3. rather than 将代码转化为 Python 3。

Use precise form for technical terms, and do not use unofficial Chinese abbreviations.

For example, use Facebook rather than facebook, fb or 脸书.

In order to maintain readability and normalization, please comply with the 6 rules above as much as possible when translating pages into Chinese.

For more information and examples of Chinese-specific rules, check out Chinese Copywriting Guidelines.

French-Specific Rules

Example descriptions on pages in French must use the third person singular present indicative tense (présent de l'indicatif à la troisième personne du singulier). For example, use Extrait une archive rather than Extraire une archive or Extrais une archive.

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