如果你要查看文件的每个部分是谁修改的, 那么 git blame 就是不二选择. 只要运行'git blame [filename]', 你就会得到整个文件的每一行的详细修改信息:包括SHA串,日期和作者:
译者注: Git采用SHA1做为hash签名算法, 在本书中,作者为了表达方便,常常使用SHA来代指SHA1. 如果没有特别说明, 本书中的SHA就是SHA1的代称.
$ git blame sha1_file.c
...
0fcfd160 (Linus Torvalds 2005-04-18 13:04:43 -0700 8) */
0fcfd160 (Linus Torvalds 2005-04-18 13:04:43 -0700 9) #include "cache.h"
1f688557 (Junio C Hamano 2005-06-27 03:35:33 -0700 10) #include "delta.h"
a733cb60 (Linus Torvalds 2005-06-28 14:21:02 -0700 11) #include "pack.h"
8e440259 (Peter Eriksen 2006-04-02 14:44:09 +0200 12) #include "blob.h"
8e440259 (Peter Eriksen 2006-04-02 14:44:09 +0200 13) #include "commit.h"
8e440259 (Peter Eriksen 2006-04-02 14:44:09 +0200 14) #include "tag.h"
8e440259 (Peter Eriksen 2006-04-02 14:44:09 +0200 15) #include "tree.h"
f35a6d3b (Linus Torvalds 2007-04-09 21:20:29 -0700 16) #include "refs.h"
70f5d5d3 (Nicolas Pitre 2008-02-28 00:25:19 -0500 17) #include "pack-revindex.h"628522ec (Junio C Hamano 2007-12-29 02:05:47 -0800 18) #include "sha1-lookup.h"
...如果文件被修改了(reverted),或是编译(build)失败了; 这个命令就可以大展身手了.
你也可以用"-L"参数在命令(blame)中指定开始和结束行:
$>git blame -L 160,+10 sha1_file.c
ace1534d (Junio C Hamano 2005-05-07 00:38:04 -0700 160)}
ace1534d (Junio C Hamano 2005-05-07 00:38:04 -0700 161)
0fcfd160 (Linus Torvalds 2005-04-18 13:04:43 -0700 162)/*
0fcfd160 (Linus Torvalds 2005-04-18 13:04:43 -0700 163) * NOTE! This returns a statically allocate
790296fd (Jim Meyering 2008-01-03 15:18:07 +0100 164) * careful about using it. Do an "xstrdup()
0fcfd160 (Linus Torvalds 2005-04-18 13:04:43 -0700 165) * filename.
ace1534d (Junio C Hamano 2005-05-07 00:38:04 -0700 166) *
ace1534d (Junio C Hamano 2005-05-07 00:38:04 -0700 167) * Also note that this returns the location
ace1534d (Junio C Hamano 2005-05-07 00:38:04 -0700 168) * SHA1 file can happen from any alternate
d19938ab (Junio C Hamano 2005-05-09 17:57:56 -0700 169) * DB_ENVIRONMENT environment variable if i