Probe for remote URL before loading it.

CHANGELOG.md

@@ -1,8 +1,15 @@
 # Changelog
 
+## 0.7.5 (2025-01-29)
+
+- **[IMPROVED]** `grit browse` (aka `open`) now checks if the remote URL exists
+  before opening the tree view. If it does not it opens the repository's "root"
+  page instead. This prevents opening a 404 page when the current branch has not
+  yet been pushed to `origin`.
+
 ## 0.7.4 (2024-10-21)
 
-- **[IMPROVED]** `grit open` (aka `browse`) now opens the GitHub tree view for
+- **[IMPROVED]** `grit browse` (aka `open`) now opens the GitHub tree view for
   the current branch, tag or hash, instead of always showing the default branch.
 
 ## 0.7.3 (2022-03-23)

cmd/grit/browse.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"net/http"
 	"net/url"
 	"path"
 	"strings"
@@ -48,7 +49,6 @@ func browse(cfg grit.Config, idx *index.Index, c *cli.Context) error {
 	// If we can determine the "HEAD" of the local clone, open the tree view for
 	// that commit. Otherwise, open the repository's root.
 	if head, err := r.Head(); err == nil {
-
 		// If the head's name is "HEAD", it's a detached HEAD. If the HEAD
 		// refers to a branch, the name will be the reference to that branch.
 		if head.Name() == "HEAD" {
@@ -67,7 +67,15 @@ func browse(cfg grit.Config, idx *index.Index, c *cli.Context) error {
 			ref = head.Hash().String()
 		}
 
+		orig := u.Path
 		u.Path = path.Join(u.Path, "tree", ref)
+
+		// Check if the target URL actually exists, and if not, revert to the
+		// original path.
+		res, err := http.Head(u.String())
+		if err != nil || res.StatusCode < http.StatusOK || res.StatusCode >= http.StatusBadRequest {
+			u.Path = orig
+		}
 	}
 
 	writef(c, "opening %s", u.String())