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Editorial Team
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Asked: 2026-05-24T02:44:44+00:00

I have a template code: <html> <head> <title> My page </title> </head> <body> CODEWOULDCOMEHERE

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I have a template code:

<html>
<head>
<title> My page </title>
</head>
<body>
CODEWOULDCOMEHERE
</BODY>
</HTML>

And I have a shell script (ksh) that is suppose to generate some more code (to be placed in the CODEWOULDCOMEHERE palce).

I just don’t know how to place that code there… I tried sed, but it didn’t work… What’s the most robust way to do that?

Worth to say that the code generated is quite long…

thanks!

[EDIT]

What I’ve tried so far: 

HTMLCODE=$(genReportStatCellHtml)
HTMLOUT=$(cat report_template.html|sed -e "s/CODEWOULDCOMEHERE/\'$HTMLCODE\'/g")

which yields: sed: 0602-404 Function s/GENERATEDHTMLCODE/\'a lot of html'/g cannot be parsed.

And:

HTMLCODE=$(genReportStatCellHtml)
HTMLOUT=$(cat report_template.html)
    echo ${HTMLOUT/CODEWOULDCOMEHERE/$HTMLCODE}

which yields: ./test.sh[8]: ${HTMLOUT/CODEWOULDCOMEHERE/$HTMLCODE}: 0403-011 The specified substitution is not valid for this command.

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1 Answer

  1. Editorial Team

    A simple way of doing this is with here docs. This is what that looks like when entered interactively:

    $ cat <<EOF
> Some literal content
> You can do parameter expansion:
> $PWD
> as well as command expansion:
> `date`
> 
> EOF
Some literal content
You can do parameter expansion:
/tmp
as well as command expansion:
Fri Jul 29 13:36:10 CDT 2011
$

    Or a shell script that does it

    #! /bin/sh
cat <<EOF >output.txt
Some literal content
You can do parameter expansion:
$PWD
as well as command expansion:
`date`

EOF

    Edit: There’s not really a good way to use an external template file with nothing more than the basic abilities of the shell, but it’s pretty easy to do in other languages. Here’s a python one liner that’ll do it.

    We need to use a specific template key for the one-liner, so CODEWOULDCOMEHERE gets replaced by {0}. 

    $ cat report_template.html 
<html>
<head>
<title> My page </title>
</head>
<body>
{0}
</BODY>
</HTML>

$ echo "Heres the part that gets inserted" | python -c 'import sys; sys.stdout.write(file(sys.argv[1]).read().format(sys.stdin.read()))' report_template.html 
<html>
<head>
<title> My page </title>
</head>
<body>
Heres the part that gets inserted

</BODY>
</HTML>

    All together, your script would look something like this

    subst_template () {
    python -c 'import sys; sys.stdout.write(file(sys.argv[1]).read().format(sys.stdin.read()))' $1
}

genReportStatCellHtml | subst_template report_template.html > report.html
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