dockerfile-and-readme-templating
Modify Cottle templates that generate Dockerfiles and READMEs in dotnet/dotnet-docker.
ソース情報
- リポジトリ
- dotnet/dotnet-docker
- ソースの最終更新活動
- 2026年9月8日 19:29
- 検出された SKILL.md の言語
- 英語
- スター
- 4,875
- フォーク
- 1,980
インストール方法
デフォルトでは、最初にソースを確認する Prompt が選択されています。直接コマンドに切り替えるか、ローカルコピーをダウンロードすることもできます。
ソースファイルを確認
インストールを決める前に、SKILL.md と SkillsMP に表示されている付属ファイルをお読みください。
SKILL.md を表示中
SKILL.md
ソースの指示 · 読み取り専用プレビュー- name
- dockerfile-and-readme-templating
- description
- Modify Cottle templates that generate Dockerfiles and READMEs in dotnet/dotnet-docker.
# Instructions for modifying Dockerfile templates
All Dockerfiles and Readmes are generated from [Cottle](https://github.com/r3c/cottle) templates in
the `eng/dockerfile-templates` and `eng/readme-templates` directories respectively.
## Cottle syntax
### Templating
All text is plain text by default. Text inside double curly braces `{{ }}` is template code.
Writing just `{{value}}` emits the evaluated value.
You can also have expressions inside template blocks which do more complicated logic.
Template code can have multiple lines in it, separated by the line ending `^` character.
The final line in a template block should not use the line ending character.
Comments inside a template block start with `_` and follow the same line ending rules.
Comments can span multiple lines.
### Template data sources
- `VARIABLES`: Variables from `manifest.versions.json`. Access with `VARIABLES["name"]`.
- `ARGS`: Passed into template via `InsertTemplate(...)` function. Access with `ARGS["name"]`
### Common functions
- Assign value: `set name to <expression>`.
- Assign function `set func(arg1, arg2) to:{{ ... }}` defines an inline function; use `return <expr>` inside.
- String functions:
- `cat(a, b, ...)`
- `join(list, sep)`
- `split(str, sep)`
- `slice(list, start, end)`.
- Collections:
- `len(list)`,
- `find(haystack, needle)` returns index or -1.
- Ternary expression: `when(condition, valueIfTrue, valueIfFalse)`.
### Conditionals
Boolean expressions:
- Operators: `=`, `!=`, `>`, `<`, `>=`, `<=`, logical `&&`, `||`, and negation `!`.
- Equality uses single `=` inside expressions (context-specific to Cottle) rather than `==`.
If statement:
```cottle
{{if condition:VALUE}}
```
Compound conditionals:
```cottle
{{if ((condition1 && condition2) || condition3):VALUE}}
```
Multiple conditions:
```cottle
{{if condition1:VALUE1^
elif condition2:VALUE2^
else:VALUE3}}
```
After the colon `:`, all whitespace is treated as literal until the next line ending character `^`.
You can also nest template blocks:
```cottle
{{if condition1:{{if condition2:VALUE}}}}
```
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