From 4521ae32bb95562b4210c23bee02a9fe1b1e3137 Mon Sep 17 00:00:00 2001
From: Ori Bernstein <ori@eigenstate.org>
Date: Wed, 10 Aug 2022 11:14:55 +0000
Subject: git/hist: add command to show history of files

---
 sys/src/cmd/git/hist   | 34 ++++++++++++++++++++++++++++++++++
 sys/src/cmd/git/mkfile |  1 +
 2 files changed, 35 insertions(+)
 create mode 100755 sys/src/cmd/git/hist

diff --git a/sys/src/cmd/git/hist b/sys/src/cmd/git/hist
new file mode 100755
index 000000000..2c0f64f72
--- /dev/null
+++ b/sys/src/cmd/git/hist
@@ -0,0 +1,34 @@
+#!/bin/rc
+rfork ne
+
+. /sys/lib/git/common.rc
+gitup
+
+fn dodiff {
+	while(t=`{read}){
+		h=$t(1)
+		o=.git/fs/object/`{git/query $h~}
+		c=.git/fs/object/$h
+		echo 'Hash:' $h
+		echo -n 'Date: '; date `{walk -em $c/msg}
+		echo -n 'Author: '; cat $c/author
+		echo -n 'Message: '; cat $c/msg
+		echo
+		for(f in $files){
+			curr=$c/tree/$f
+			prev=$o/tree/$f
+			if(! test -e $curr)
+				curr=/dev/null
+			if(! test -e $prev)
+				prev=/dev/null
+			diff -u $prev $curr
+		}
+		echo
+	}
+}
+
+if(~ $#* 0)
+	die usage: $0 files...
+
+files=`{cleanname $gitrel/$*}
+git/log -s $files | dodiff
diff --git a/sys/src/cmd/git/mkfile b/sys/src/cmd/git/mkfile
index e8df434ff..d69be86dd 100644
--- a/sys/src/cmd/git/mkfile
+++ b/sys/src/cmd/git/mkfile
@@ -21,6 +21,7 @@ RC=\
 	compat\
 	diff\
 	export\
+	hist\
 	import\
 	init\
 	merge\
-- 
cgit v1.2.3