shtool-subst - Online in the Cloud

PROGRAM:

NAME

shtool-subst - GNU shtool sed(1) substitution operations

SYNOPSIS

shtool subst [-v|--verbose] [-t|--trace] [-n|--nop] [-w|--warning] [-q|--quiet]
[-s|--stealth] [-i|--interactive] [-b|--backup ext] [-e|--exec cmd] [-f|--file cmd-file]
[file] [file ...]

DESCRIPTION

This command applies one or more sed(1) substitution operations to stdin or any number of
files.

OPTIONS

The following command line options are available.

-v, --verbose
Display some processing information.

-t, --trace
Enable the output of the essential shell commands which are executed.

-n, --nop
No operation mode. Actual execution of the essential shell commands which would be
executed is suppressed.

-w, --warning
Show warning on substitution operation resulting in no content change on every file.
The default is to show a warning on substitution operations resulted in no content
change on all files.

-q, --quiet
Suppress warning on substitution operation resulting in no content change.

-s, --stealth
Stealth operation. Preserve timestamp on file.

-i, --interactive
Enter interactive mode where the user has to approve each operation.

-b, --backup ext
Preserve backup of original file using file name extension ext. Default is to
overwrite the original file.

-e, --exec cmd
Specify sed(1) command directly.

-f, --file cmd-file
Read sed(1) command from file.

EXAMPLE

# shell script
shtool subst -i -e 's;(c) \([0-9]*\)-2000;(c) \1-2001;' *.[ch]

# RPM spec-file
%install
shtool subst -v -n \
-e 's;^\(prefix=\).*;\1 $RPM_BUILD_ROOT%{_prefix};g' \
-e 's;^\(sysconfdir=\).*;\1 $RPM_BUILD_ROOT%{_prefix}/etc;g' \
`find . -name Makefile -print`
make install

HISTORY

The GNU shtool subst command was originally written by Ralf S. Engelschall
<[email protected]> in 2001 for GNU shtool. It was prompted by the need to have a
uniform and convenient patching frontend to sed(1) operations in the OpenPKG package
specifications.

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