(v0.1.1) Automated packaging of release by Packagr

vendor/github.com/jaypipes/pcidb/context.go

@@ -0,0 +1,71 @@
+package pcidb
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"runtime"
+
+	homedir "github.com/mitchellh/go-homedir"
+)
+
+// Concrete merged set of configuration switches that get passed to pcidb
+// internal functions
+type context struct {
+	chroot              string
+	cacheOnly           bool
+	cachePath           string
+	disableNetworkFetch bool
+	searchPaths         []string
+}
+
+func contextFromOptions(merged *WithOption) *context {
+	ctx := &context{
+		chroot:              *merged.Chroot,
+		cacheOnly:           *merged.CacheOnly,
+		cachePath:           getCachePath(),
+		disableNetworkFetch: *merged.DisableNetworkFetch,
+		searchPaths:         make([]string, 0),
+	}
+	ctx.setSearchPaths()
+	return ctx
+}
+
+func getCachePath() string {
+	hdir, err := homedir.Dir()
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Failed getting homedir.Dir(): %v", err)
+		return ""
+	}
+	fp, err := homedir.Expand(filepath.Join(hdir, ".cache", "pci.ids"))
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Failed expanding local cache path: %v", err)
+		return ""
+	}
+	return fp
+}
+
+// Depending on the operating system, sets the context's searchPaths to a set
+// of local filepaths to search for a pci.ids database file
+func (ctx *context) setSearchPaths() {
+	// A set of filepaths we will first try to search for the pci-ids DB file
+	// on the local machine. If we fail to find one, we'll try pulling the
+	// latest pci-ids file from the network
+	ctx.searchPaths = append(ctx.searchPaths, ctx.cachePath)
+	if ctx.cacheOnly {
+		return
+	}
+
+	rootPath := ctx.chroot
+
+	if runtime.GOOS != "windows" {
+		ctx.searchPaths = append(
+			ctx.searchPaths,
+			filepath.Join(rootPath, "usr", "share", "hwdata", "pci.ids"),
+		)
+		ctx.searchPaths = append(
+			ctx.searchPaths,
+			filepath.Join(rootPath, "usr", "share", "misc", "pci.ids"),
+		)
+	}
+}