Specify binary name for checking with --upgrade-only

Fixes zyedidia#32

README.md

@@ -132,10 +132,9 @@ Application Options:
       --all            extract all candidate files
   -q, --quiet          only print essential output
       --download-only  stop after downloading the asset (no extraction)
-      --upgrade-only   only download if release is more recent than current
-                       version
-  -a, --asset=         download a specific asset containing the given string; can be specified multiple times for additional
-                       filtering
+      --upgrade-only   only download if release is more recent than current version
+  -b, --binary=        binary name of current version
+  -a, --asset=         download a specific asset containing the given string; can be specified multiple times for additional filtering
       --sha256         show the SHA-256 hash of the downloaded asset
       --verify-sha256= verify the downloaded asset checksum against the one provided
       --rate           show GitHub API rate limiting information

eget.go

@@ -107,9 +107,12 @@ func getFinder(project string, opts *Flags) (finder Finder, tool string) {
 
 		var mint time.Time
 		if opts.UpgradeOnly {
-			parts := strings.Split(project, "/")
-			last := parts[len(parts)-1]
-			mint = bintime(last)
+			bin := opts.BinaryName
+			if bin == "" {
+				parts := strings.Split(project, "/")
+				bin = parts[len(parts)-1]
+			}
+			mint = bintime(bin)
 		}
 
 		finder = &GithubAssetFinder{

flags.go

@@ -10,6 +10,7 @@ type Flags struct {
 	Quiet       bool     `short:"q" long:"quiet" description:"only print essential output"`
 	DLOnly      bool     `long:"download-only" description:"stop after downloading the asset (no extraction)"`
 	UpgradeOnly bool     `long:"upgrade-only" description:"only download if release is more recent than current version"`
+	BinaryName  string   `short:"b" long:"binary" description:"binary name of current version"`
 	Asset       []string `short:"a" long:"asset" description:"download a specific asset containing the given string; can be specified multiple times for additional filtering"`
 	Hash        bool     `long:"sha256" description:"show the SHA-256 hash of the downloaded asset"`
 	Verify      string   `long:"verify-sha256" description:"verify the downloaded asset checksum against the one provided"`

man/eget.md

@@ -87,6 +87,10 @@ header: Eget Manual
 
 :    Only download the asset if the release is more recent than an existing asset with the same name in `$EGET_BIN`, or the current directory if `$EGET_BIN` is not defined.
 
+  `-b, --binary=`
+
+:    Specify asset binary name present in `$EGET_BIN` or current directory. Used with `--upgrade-only` when repo name differs from the binary name.
+
   `-a, --asset=`
 
 :    Download a specific asset containing the given string. If there is an exact match with an asset, that asset is used regardless. This option can be specified multiple times for additional filtering. Example: **`eget --asset nvim.appimage neovim/neovim`**. Example **`eget --download-only --asset amd64.deb --asset musl sharkdp/bat`**.