make diff 忽略符号链接

Question

我的项目具有以下结构

/project/config.mk
/project/dir1/config.mk -> ../config.mk
/project/dir2/config.mk -> ../config.mk

当我使用 diff 创建补丁文件时，/project/config.mk 已正确完成，但两个符号链接出现了一些问题。它们都被视为新文件，差异部分是 config.mk 文件的全部内容。我试图找到一个 diff 选项来禁用以下符号链接，但没有这样的选项可用。任何建议表示赞赏。

根据 Overbose 的建议，我创建了这个脚本。有用。感谢大家抽出时间回答。

#!/bin/sh -v
ori_dir=$1
new_dir=$2
patch_file=./patch_file
if [ -f ${patch_file} ]
then
        rm ${patch_file}
fi
ori_files=`cd ${ori_dir} ; find ./ -type f ! -type l`
for i in ${ori_files} ; do 
        if [ -f ${ori_dir}/$i ] 
        then
                if [ -f ${new_dir}/$i ]
                then
                        diff -rup ${ori_dir}/$i ${new_dir}/$i >> ${patch_file}
                fi
        fi
done

Answer 1

在 GNU diff v3.3 中，现在有一个选项 --no-dereference 可以解决这个问题

Answer 2

如果将如下行添加

dir1/config.mk
dir2/config.mk

到文件 .ignore-diff 中

，则可以像这样执行 diff(1)：

diff -ur -X .ignore-diff

Answer 3

按以下方式使用 find：

find . ! -type l

此选项应跳过以下符号链接。在运行 diff 之前使用该命令找到您的文件。

Answer 4

作为我所做尝试的总结。工作解决方案是对我的案例使用 --no-dereference 。

对于 -X 选项，您可以通过此链接获取帮助：stackoverflow.com : 如何区分特定类型的仅文件目录

# max diff
diff -ruN ~/xxx-web/ ~/www/xxx/xxx-web/ > ~/xxx-web/20180523-diff.patch
# but may get too much symbolic link following, so in GNU diff v3.3 use :
diff --no-dereference -ruN ~/xxx-web/ ~/www/xxx/xxx-web/ > ~/xxx-web/20180523-diff.patch

## if no options available, you can try a solution that do not seem to work under 3.3 :
# find . -type l > .diffignore
## passing direct file will not work, it require file pattern ?
# diff -ruN -x .diffignore 
## passing with xargs do not seem to work the way below on 3.3 ...
# diff -ruN $(cat .diffignore | xargs -L1 echo "-x ")
# diff -ruN $(cat .diffignore | xargs -i echo "-x '{}'" | sed 's,\./vivaoresto-web/,*,g') \
# inFolder outFolder > diff.patch
# if you wanna apply your path in the source directory :
cd ~/www/xxx/xxx-web/
patch -p1 < ~/xxx-web/20180523-diff.patch