Source file src/github.com/fergusstrange/embedded-postgres/cache_locator.go

Documentation: github.com/fergusstrange/embedded-postgres

     1  package embeddedpostgres
     2  
     3  import (
     4  	"fmt"
     5  	"os"
     6  	"path/filepath"
     7  )
     8  
     9  // CacheLocator retrieves the location of the Postgres binary cache returning it to location.
    10  // The result of whether this cache is present will be returned to exists.
    11  type CacheLocator func() (location string, exists bool)
    12  
    13  func defaultCacheLocator(cacheDirectory string, versionStrategy VersionStrategy) CacheLocator {
    14  	return func() (string, bool) {
    15  		if cacheDirectory == "" {
    16  			cacheDirectory = ".embedded-postgres-go"
    17  			if userHome, err := os.UserHomeDir(); err == nil {
    18  				cacheDirectory = filepath.Join(userHome, ".embedded-postgres-go")
    19  			}
    20  		}
    21  
    22  		operatingSystem, architecture, version := versionStrategy()
    23  		cacheLocation := filepath.Join(cacheDirectory,
    24  			fmt.Sprintf("embedded-postgres-binaries-%s-%s-%s.txz",
    25  				operatingSystem,
    26  				architecture,
    27  				version))
    28  
    29  		info, err := os.Stat(cacheLocation)
    30  
    31  		if err != nil {
    32  			return cacheLocation, os.IsExist(err) && !info.IsDir()
    33  		}
    34  
    35  		return cacheLocation, !info.IsDir()
    36  	}
    37  }
    38  

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