[nz_btn text="Software Resiliency" link="http://casthighlight.wpengine.com/category/product/indicators-methodology/software-resiliency" target="_self" animate="false" animation_type="ghost" color="black" size="small" shape="rounded" type="normal" hover_normal="fill" hover_ghost="fill" icon="icon-dashboard"][nz_btn text="Code Reliability" target="_self" animate="false" animation_type="ghost" color="black" size="small" shape="rounded" type="ghost" hover_normal="fill" hover_ghost="screen" link="http://casthighlight.wpengine.com/category/product/indicators-methodology/code-insights/software-resiliency/code-reliability/" icon="icon-code"]

Why you should care

Using the simplified, but deprecated/discouraged commands in shell scripts can lead to minor unpredictability and less feature flexibility. It is better practice to stick to the established alternatives to these two commands, for readability, consistency and expansion.

Why you should care

Using certain syntax in shell, like these simplified commands can have issues with behavioral consistency and flexibility. Avoiding modern syntax can potentially lead to unexpected application behavior and increased development time debugging. [nz_btn text="Production Risk" target="_self" animate="false" animation_type="ghost" color="pink" size="small" shape="rounded" type="normal" hover_normal="opacity" hover_ghost="fill" link="http://casthighlight.wpengine.com/category/product/indicators-methodology/innovation/" icon="icon-office"]

CAST Recommendations

Encouraging developers to read up on the latest syntax/suggested style for shell – in order to reduce their use of outdated/partially deprecated commands, even if their use might simplify the appearance of the code.

References

https://stackoverflow.com/questions/669452/is-double-square-brackets-preferable-over-single-square-brackets-in-ba https://stackoverflow.com/questions/22709371/backticks-vs-braces-in-bash[nz_btn text="Style Guide" link="https://github.com/Kristories/awesome-guidelines" target="_self" icon="icon-book" animate="false" animation_type="ghost" color="turquoise" size="small" shape="rounded" type="ghost" hover_normal="fill" hover_ghost="fill"]

How we detect

This code insight counts one violation each time following pattern for command execution and conditions are encountered :

• ` <command> `
• [ <condition> ]

[nz_btn text="See features" link="http://casthighlight.wpengine.com/outputs-analytics/" target="_self" icon="icon-stats" animate="false" animation_type="ghost" color="black" size="small" shape="rounded" type="normal" hover_normal="fill" hover_ghost="fill"][nz_btn text="How it works" link="http://casthighlight.wpengine.com/how-it-works/" target="_self" icon="icon-cog" animate="false" animation_type="ghost" color="black" size="small" shape="rounded" type="ghost" hover_normal="fill" hover_ghost="fill"]