git-author-stats: cleanup and add docs

1 files changed, 10 insertions, 11 deletions

diff --git a/git-author-stats b/git-author-stats
index 8bd2d9b..ede4ef2 100755
--- a/git-author-stats
+++ b/git-author-stats
@@ -1,5 +1,8 @@
 #!/usr/bin/env bash
-
+#
+# Print lines added/removed and number of commits by author. Optional arg is a
+# path passed to 'git log'.
+#
 script=$(cat << 'EOF'
 NF == 1 { name = $1; commits[name] += 1 }
 NF == 3 { plus[name] += $1; minus[name] += $2 }
@@ -10,13 +13,9 @@ END {
 }
 EOF
 )
-
-(printf $'name\tadded\tremoved\tcommits\n';
-
-git log --numstat --pretty=$'%aN' "$@" \
-    | awk -F$'\t' "$script" \
-    | sort --field-separator=$'\t' -k${ASTATS_SORT_COLUMN:-2} -gr
-) > /tmp/git-author-stats
-
-column -t -s $'\t' /tmp/git-author-stats
-rm /tmp/git-author-stats
+column -t -s $'\t' <(
+  printf $'name\tadded\tremoved\tcommits\n';
+  git log --numstat --pretty=$'%aN' "$@" \
+      | awk -F$'\t' "$script" \
+      | sort --field-separator=$'\t' -k${ASTATS_SORT_COLUMN:-2} -gr
+)