[JENKINS-46582] stash / unstash pipeline step is not preserving files timestamp

I'd like to checkout some source code once, and incrementally build it in parallel with different compilation options, using the following pipeline:

node {

  checkout scm

  stash name: 'sources'

}


parallel (

    'release': {

      node() {

unstash 'sources'

make BUILD=release

      }

    },

    'debug': {

      node() {

unstash 'sources'

make BUILD=debug

      }

    }

)  

   

It is working almost fine. The issue is that at each build, the full source code is rebuild, even if running on the same node than previous compilation.

The root cause is the untash step which is not preserving the initial file timestamp. Therefore my build system supposed every files has been modified since the last build.

---
Originally reported by jguigui, imported from: stash / unstash pipeline step is not preserving files timestamp

• status: Open
  
• priority: Minor
  
• component(s): workflow-basic-steps-plugin
  
• label(s): stash, timestamp, triaged-2018-11
  
• resolution: Unresolved
  
• votes: 2
  
• watchers: 3
  
• imported: 20251215-220547
  

Raw content of original issue

I'd like to checkout some source code once, and incrementally build it in parallel with different compilation options, using the following pipeline:



node {

  checkout scm

  stash name: 'sources'

}


parallel (

    'release': {

      node() {

        unstash 'sources'

        make BUILD=release

      }

    },

    'debug': {

      node() {

        unstash 'sources'

        make BUILD=debug

      }

    }

)  

   





It is working almost fine. The issue is that at each build, the full source code is rebuild, even if running on the same node than previous compilation.

The root cause is the untash step which is not preserving the initial file timestamp. Therefore my build system supposed every files has been modified since the last build.

environment

```
Jenkins 2.76

Linux
```

Beginne mit der Implementierung von workflow-basic-steps-plugin hinter den Pipeline-Schritten stash und unstash, wobei die bereitgestellte parallele Pipeline als Reproduktionsfall dient. Bestätige, wie Dateien unter Linux wiederhergestellt werden, und ermittle die vorhandene Testabdeckung; abgeschlossen ist die Aufgabe, wenn unstash die ursprünglichen Quellzeitstempel beibehält, sodass inkrementelle Builds unveränderte Dateien nicht neu erstellen.

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