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ansgarz 2021-11-30 17:51:24 +00:00
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adr-provs/quasi-idempotence.md
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@ -23,12 +23,12 @@ We follow the principle "build from scratch", so we leave the question of softwa
## Consequence
1. add / change (a line) in existing files
1. Solution: Query for changed location respecting the file type / format and skip if it was already performed. We try to avoid this case and use separate files instead of modifying existing ones.
* Solution: Query for changed location respecting the file type / format and skip if it was already performed. We try to avoid this case and use separate files instead of modifying existing ones.
2. installation of an single / directory file
1. Solution: If the file/directory exists, we consider installation successful and skip this step in another installation run
* Solution: If the file/directory exists, we consider installation successful and skip this step in another installation run
3. installation of many files/directories
1. Solution: If the last file/directory exists, we consider installation successful and skip this step in another installation run - this is useful in order to skip time consuming steps. For fast / trivial steps we can choose solution 2.
* Solution: If the last file/directory exists, we consider installation successful and skip this step in another installation run - this is useful in order to skip time consuming steps. For fast / trivial steps we can choose solution 2.
4. install apt/deb package
1. Solution: Query whether package (name without version) is installed (either implicitly e.g. in case of apt or explicitly in other cases to avoid unnecessary downloads etc)
* Solution: Query whether package (name without version) is installed (either implicitly e.g. in case of apt or explicitly in other cases to avoid unnecessary downloads etc)
5. running docker containers
1. Solution: Query whether container with name (we have to provide the name on container start) is already running
* Solution: Query whether container with name (we have to provide the name on container start) is already running