Improve gitrecap

tree/.local/bin/gitrecap

@@ -1,5 +1,26 @@
 #!/usr/bin/env fish
 
-set MY_LATEST_COMMIT (git log --author "joakim@hulthe.net" --pretty=format:%H | head -n 1)
+if set -q argv[1]
+	set N $argv[1]
+else
+	set N 1
+end
 
-git diff $MY_LATEST_COMMIT
+function nth_commit -a n
+	git log --author "joakim@hulthe.net" --pretty=format:%H \
+		| head -n $n \
+		| tail -n 1
+end
+
+set DIFF_FROM (nth_commit $N)
+set DIFF_TO "HEAD"
+
+if test $N -gt 1
+	set DIFF_TO (nth_commit (math $N - 1))"~1"
+end
+
+#echo "git diff"
+#echo "    $DIFF_FROM"
+#echo "    $DIFF_TO"
+
+git diff $DIFF_FROM $DIFF_TO