bash 将“sed”命令扩展到多行
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Spread 'sed' command over multiple lines
提问by Ratty
I am trying to spread one sed command over several lines in a bash file. I have multiple patterns that sed checks for and I am hoping to separate some of the patterns by a line change. Here is my current script that does not work, putting everything on one line works but I was hoping to just clean it up a bit and split things up.
我试图在 bash 文件中的多行中传播一个 sed 命令。我有多个 sed 检查的模式，我希望通过换行来分隔一些模式。这是我当前的脚本不起作用，将所有内容放在一行上有效，但我希望稍微清理一下并将其拆分。
#!/bin/sh -f
#files=$(ls -1 | egrep '.avi|.mkv');
#echo $files
for f in *.mkv *.avi;
do
renF=`echo $f | tr '.' ' ' | sed -e 's/ \([^ ]*\)$/./; s/\ \[sharethefiles\ com\]//i' \
-e 's/\ x264\-Ctu//i; s/\ x264\-Bia//i; s/\ x264\-Fov//i' \
-e 's/\ Xvid\-Lol//i; s/\ Xvid\-Xor//i; s/\ Xvid\-Notv//i; s/\ Xvid\-Fqm//i; s/\ Xvid\-p0w4//i; Xvid\-BIA//i; s/\ Xvid\-Chgrp//i; s/\ Xvid\-Fov//i' \
-e 's/\ PDTV\-Fov//i; s/\ PDTV\-River//i; s/\ PDTV\-Sfm' \
-e 's/\ Dts\-Chd//i; s/\ WEB\-DL//i; s/\ H264\-SURFER//i' \
-e 's/\ Dsr//; s/\ WS//i; s/\ PDTV//i; s/\ X264//i; s/\ Blu\-Ray//; s/\ Bdrip//i; s/\ Bluray//i; s/\ HDTV//i; s/\ DTS//i; s/\ AC3//i; s/\ Dd5//i; s/\ Dualaudio//i; s/\ AAC2//i; s/\ XVID//i'`
#echo $renF
if [ "$f" == "$renF" ]; then
echo "FileName already cleaned."
else
mv "$f" "$renF"
fi
done
Thanks for any help!
谢谢你的帮助！
采纳答案by Paused until further notice.
The problem is on this line:
问题出在这一行：
-e 's/\ Xvid\-Lol//i; s/\ Xvid\-Xor//i; s/\ Xvid\-Notv//i; s/\ Xvid\-Fqm//i; s/\ Xvid\-p0w4//i; Xvid\-BIA//i; s/\ Xvid\-Chgrp//i; s/\ Xvid\-Fov//i' \
There's a missing s/. It should be:
有一个失踪s/。它应该是：
-e 's/\ Xvid\-Lol//i; s/\ Xvid\-Xor//i; s/\ Xvid\-Notv//i; s/\ Xvid\-Fqm//i; s/\ Xvid\-p0w4//i; s/\ Xvid\-BIA//i; s/\ Xvid\-Chgrp//i; s/\ Xvid\-Fov//i' \
I included the backslash for consistency.
为了一致性，我包含了反斜杠。
This line is missing //i:
缺少这一行//i：
-e 's/\ PDTV\-Fov//i; s/\ PDTV\-River//i; s/\ PDTV\-Sfm
Corrected:
更正：
-e 's/\ PDTV\-Fov//i; s/\ PDTV\-River//i; s/\ PDTV\-Sfm//i
The error messages I got were what led me to the source of the errors:
我得到的错误消息使我找到了错误的根源：
sed: -e expression #3, char 93: unknown command: `X'
and
和
sed: -e expression #4, char 51: unterminated `s' command
Here's a suggestion on how to make this more readable and maintainable:
以下是有关如何使其更具可读性和可维护性的建议：
while read -r pattern
do
sedscript+="$pattern;"
done <<EOF
s/ \([^ ]*\)$/./
s/\ \[sharethefiles\ com\]//i
s/\ x264\-Ctu//i
s/\ x264\-Bia//i
...
s/\ XVID//i
EOF
renF=$(echo "$f" | tr '.' ' ' | sed -e "$sedscript")
回答by icyrock.com
Not sure if I understood you, but you can do something like this if you just want to have multiple lines of sed expressions:
不确定我是否理解你，但如果你只想拥有多行 sed 表达式，你可以做这样的事情：
v=`echo 123|sed 's/1/2/
s/2/3/
s/3/4/'`; echo $v
This displays 423, as expected.
这423如预期的那样显示。
If you want it on one line, that's possible, too:
如果你想在一行上，那也是可能的：
v=`echo 123|sed 's/1/2/ ; s/2/3/ ; s/3/4/'`; echo $v
gives the same result.
给出相同的结果。
For what I see, I would actually suggest doing it in multiple lines as you are already doing, just putting every -e on a separate line, as I think that is more readable. Something like:
对于我所看到的，我实际上建议像您已经在做的那样在多行中进行，只需将每个 -e 放在单独的行上，因为我认为这更具可读性。就像是：
v=`echo 123|sed \
-e 's/1/2/' \
-e 's/2/3/' \
-e 's/3/4/'`
echo $v
Check this link for more information:
查看此链接以获取更多信息：
under Quoting multiple sed lines in the Bourne shell
在下面 Quoting multiple sed lines in the Bourne shell
回答by mahemoff
A possibly nicer alternative would be to use a heredoc, if GNU sed is available (not built into OSX):
如果 GNU sed 可用（未内置到 OSX 中），则可能更好的替代方法是使用 heredoc：
sed -f - "$IN" > "$OUT" << SED_SCRIPT
s/a/1/g
s/test/full/g
SED_SCRIPT
Source: https://unix.stackexchange.com/questions/45591/using-a-here-doc-for-sed-and-a-file
资料来源：https: //unix.stackexchange.com/questions/45591/using-a-here-doc-for-sed-and-a-file
