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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,48 @@ | ||
| #! /bin/bash | ||
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| # create a symlink, idempotent | ||
| # | ||
| # (c) Thomas Lange 2019, lange@debian.org | ||
| # | ||
| # if $target is defined, create link relative to $target | ||
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| mk-link() { | ||
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| local from=$1 | ||
| local to=$2 | ||
| local oldto | ||
| local vopt | ||
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| if [ X$verbose = X1 ]; then | ||
| vopt=-v | ||
| fi | ||
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| # todo: check if $from starts with a slash | ||
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| if [ -n "$target" ]; then | ||
| from="$target$from" | ||
| fi | ||
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| if [ ! -e $from -a ! -h $from ]; then | ||
| ln -s $vopt $to $from | ||
| return | ||
| fi | ||
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| # check if already same link | ||
| if [ -h $from ]; then | ||
| oldto=$(readlink $from) | ||
| if [ $oldto = $to ]; then | ||
| if [ X$verbose = X1 ]; then | ||
| printf "fai-link: Nothing to do for link $from -> $to\n" | ||
| fi | ||
| return | ||
| fi | ||
| fi | ||
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| # if different create new link | ||
| ln -sf $vopt $to $from | ||
| } | ||
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| # make link from to | ||
| mk-link $1 $2 |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,71 @@ | ||
| #! /bin/bash | ||
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| # fai-sed, call sed with diff before writing | ||
| # | ||
| # (c) Thomas Lange 2019, lange@debian.org | ||
| # | ||
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| # idempotent sed. Execute sed command on a file | ||
| # but do not overwrite file if nothing has changed | ||
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| dryrun=0 | ||
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| cmd=$1 | ||
| shift | ||
| filename=$1 | ||
| shift | ||
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| if [ -z "$cmd" -o -z "$filename" ]; then | ||
| printf "Please add filename and sed command\n" | ||
| exit 3 | ||
| fi | ||
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| # do not allow more than one file | ||
| if [ -n "$1" ]; then | ||
| printf "Aborting. Too many arguments.\n" | ||
| exit 9 | ||
| fi | ||
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| if [ -n "$target" ]; then | ||
| filename="$target$filename" | ||
| fi | ||
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| if [ ! -f $filename ]; then | ||
| printf "WARNING: $filename does not exists. Skipping\n" | ||
| exit 0 | ||
| fi | ||
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| tmp=$(mktemp) | ||
| trap "rm $tmp" EXIT | ||
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| printf "sed -e $cmd $filename: " | ||
| # cp file so we can use sed -i, otherwise the new file created by sed has different chmod, owner | ||
| cp -p $filename $tmp | ||
| sed -i -e "$cmd" $tmp | ||
| res=$? | ||
| if [ $res -ne 0 ]; then | ||
| printf "sed error $res\n" | ||
| exit $res | ||
| fi | ||
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| cmp -s $filename $tmp | ||
| res=$? | ||
| if [ $res -eq 2 ]; then | ||
| printf " diff error $res. No changes made to $filename\n" | ||
| exit 2 | ||
| elif [ $res -eq 0 ]; then | ||
| printf " No changes.\n" | ||
| if [ $dryrun -eq 1 ]; then | ||
| exit 0 | ||
| fi | ||
| else | ||
| if [ $dryrun -eq 1 ]; then | ||
| printf " Dry-run. Changes not applied.\n" | ||
| exit 0 | ||
| else | ||
| mv $tmp $filename | ||
| printf " File changed.\n" | ||
| trap '' EXIT | ||
| exit 1 | ||
| fi | ||
| fi |
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