通过 sed 命令在 bash 脚本中编辑文件
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Edit File in bash script by sed command
提问by Yasmin
I am a beginner in bash script, and I am facing a problem. I created file "script.sh" and I want to open template file and replace specific attributes with different values. Here is my script and I appreciate if someone tell me what is the problem ..
我是 bash 脚本的初学者，我正面临一个问题。我创建了文件“script.sh”，我想打开模板文件并用不同的值替换特定的属性。这是我的脚本，如果有人告诉我有什么问题，我将不胜感激..
#!/bin/bash
TEMPLATEFILE="Template.xml"
XMLDir="Results"
OUTPUTDir="Output"
TIMES=2
QUAN=50
DIST=150
OUTPUT_File="Output_"
mkdir $XMLDir
mkdir $OUTPUTDir
rm -rf $XMLDir
rm -rf $OUTPUTDir
echo $TIMES
x=1
echo ${x}
while [ $x -le $TIMES ]
do
RANDOMVAR =${Random}
outputFile=${OUTPUT_File}"_"${QUAN}"_"${RANDOMVAR}"_"${DIST}".xml"
outputText=${OUTPUT_File}"_"${QUAN}"_"${RANDOMVAR}"_"${DIST}".txt"
touch ${outputFile}
sed -e "s/$SEEDVALUE/$RANDOMVAR/"
-e "s/$EXPIREMENT/$QUAN/"
-e "s/$DISTANCE/$DIST/"
-e "s/$OUTPUTFILE/$outputText/"
< $TEMPLATEFILE > $outputFile
echo $outputFile" is generated in "$x" iteration out of "$TIMES
x=$(( $x + 1 ))
done
echo "done"
I run the file in terminal by : bash script.sh
我通过以下方式在终端中运行文件：bash script.sh
The xml file contains a lot of lines, but I am trying to change the following:
xml 文件包含很多行，但我正在尝试更改以下内容：
<run length="0" seed_value="SEEDVALUE" />
<outputfileName name="expirement" output="OUTPUTFILE" />
<distancevalue value="DISTANCE" />
<entity number="EXPIREMENT" base_num="1">
When running the script , it gives me "unexpected end of file"
运行脚本时，它给了我“意外的文件结尾”
回答by dtorgo
sed -e "s/$SEEDVALUE/$RANDOMVAR/"
sed -e "s/$SEEDVALUE/$RANDOMVAR/"
This command is taking a variable "$SEEDVALUE" and replacing it with "$RANDOMVAR" but you are never setting the SEEDVALUE to anything. The actual command that you are issuing looks like this:
此命令采用变量“$SEEDVALUE”并将其替换为“$RANDOMVAR”，但您永远不会将 SEEDVALUE 设置为任何内容。您发出的实际命令如下所示：
sed -e "s//$RANDOMVAR/"
sed -e "s//$RANDOMVAR/"
For my string replace placeholders I usually make them stand out by using "handlebars" {{ }}.
对于我的字符串替换占位符，我通常使用“把手”{{}} 使它们脱颖而出。
Try this instead:
试试这个：
First make sure that your template file contains the placeholder {{SEEDVALUE}}. Second, you do not need to do the first redirect "<" sed will act on a file if you simply pass it in.
首先确保您的模板文件包含占位符 {{SEEDVALUE}}。其次，你不需要做第一次重定向，如果你简单地传入它，sed 将作用于一个文件。
Here is a VERY simplified version to help make things clearer:
这是一个非常简化的版本，以帮助使事情更清晰：
echo "This is some line. This is what was replaced with my placeholder: {{SEEDVALUE}}" > /tmp/testfile
RANDOMVAR="my new text"
sed -e "s/{{SEEDVALUE}}/$RANDOMVAR/" /tmp/testfile > /tmp/testfile-replaced
cat /tmp/testfile-replaced
回答by StianE
Looks to me like those sed commands arguments are not on the same line and line shift is not escaped. Try:
在我看来，那些 sed 命令参数不在同一行上，并且不会对换行进行转义。尝试：
sed -e "s/$SEEDVALUE/$RANDOMVAR/" \
-e "s/$EXPIREMENT/$QUAN/" \
-e "s/$DISTANCE/$DIST/" \
-e "s/$OUTPUTFILE/$outputText/" \
< $TEMPLATEFILE > $outputFile
Also, to get more debugging information, it's often useful to use the following as interpreter:
此外，为了获得更多调试信息，使用以下内容作为解释器通常很有用：
#!/bin/bash -x
回答by Piervit
Not sure what you are doing. I don't think $SEEDVALUE variable is defined.
不确定你在做什么。我认为没有定义 $SEEDVALUE 变量。
I think your sed command should start a bit more like this
我认为你的 sed 命令应该像这样开始
sed -e "s/seed_value=\"[0-9]*\"/seed_value=\"$RANDOMVAR\"/g"
