322 lines
9.0 KiB
Bash
322 lines
9.0 KiB
Bash
# ------------------------------------------------------------------------------
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# File manipulation function
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# This file is part of the init.sh project
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# Copyright (c) 2019-2022 Geoffray Levasseur <fatalerrors@geoffray-levasseur.org>
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# ------------------------------------------------------------------------------
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# This file is distributed under 3-clause BSD license.
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# The complete license agreement can be obtained at:
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# https://opensource.org/licenses/BSD-3-Clause
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# ------------------------------------------------------------------------------
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# Some useful variables:
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export HOST_REPO_PATH=${HOST_REPO_PATH:-"$MYPATH/repo/hosts/$HOSTNAME"}
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export GROUP_REPO_PATH=${GROUP_REPO_PATH:-"$MYPATH/repo/groups"}
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export COMM_REPO_PATH=${COMM_REPO_PATH:-"$MYPATH/repo/common"}
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# ------------------------------------------------------------------------------
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# Backup original installation files
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# (or any old files if runned several time on same file)
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backup_dist()
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{
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if [[ $# -lt 1 ]]; then
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prnt E "backup_dist(): At least one argument is required."
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exit 11
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fi
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local file=
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for file in $@; do
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local tmstmp=$(stdtime)
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if [[ -L ${file} ]]; then
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# With symbolik links we call again backup_dist to treat target
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prnt I "Following the symbolic link $file to do a proper backup..."
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backup_dist $(readlink -f ${file})
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elif [[ -f ${file} ]]; then
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prnt I "Creating a backup of ${file} on $tmstmp..."
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cp -av $file ${file}.dist.${tmstmp}
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if [[ $? -ne 0 ]]; then
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prnt E "backup_dist(): Failed copying file."
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die 12
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fi
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elif [[ -d ${file} ]]; then
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prnt I "Creation a backup of the directory ${file} on $tmstmp..."
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cp -av $file ${file}.dist.${tmstmp}
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if [[ $? -ne 0 ]]; then
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prnt E "backup_dist(): Failed copyind directory recursively."
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die 12
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fi
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else
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prnt W "backup_dist(): $file don't exists, nothing to do."
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fi
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unset tmstmp
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done
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unset file
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}
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export -f backup_dist
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# ------------------------------------------------------------------------------
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# Select source file according to our priority mechanism
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select_file()
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{
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local infile=$1
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if [[ -f $HOST_REPO_PATH/$infile ]]; then
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local source="$HOST_REPO_PATH/$infile"
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elif [[ -f $COMM_REPO_PATH/$infile ]]; then
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local source="$COMM_REPO_PATH/$infile"
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else
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# Not found in repository, we expect full name
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local source="$infile"
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fi
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unset infile
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echo $source
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unset source
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}
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export -f select_file
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# ------------------------------------------------------------------------------
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# Select source directory according to our priority mechanism
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select_directory()
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{
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local indir=$1
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if [[ -d $HOST_REPO_PATH/$indir ]]; then
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local source="$HOST_REPO_PATH/$indir"
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elif [[ -d $COMM_REPO_PATH/$indir ]]; then
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local source="$COMM_REPO_PATH/$indir"
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else
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# Not found in repository, we expect full name
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local source="$indir"
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fi
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unset indir
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echo $source
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unset source
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}
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export -f select_directory
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# ------------------------------------------------------------------------------
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# Install file to the host (specific first then general)
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# Todo: implement wildcard support
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install_file()
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{
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local filelist=""
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local i=0
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if [[ $# -lt 2 ]]; then
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prnt E "install_file(): At least two arguments are required."
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die 11
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fi
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if [[ $(echo $@ | grep "\*\|\?") ]]; then
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prnt E "install_file(): Wildcards are not authorized."
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die 7
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fi
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local arg=
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for arg in $@; do
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filelist="$filelist $(select_file $arg)"
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done
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unset arg
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# Empty to just obtain the target which is the last element of the list
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local file=
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for file in $filelist; do
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:
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done
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if [[ ! $file == /* ]]; then
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prnt E "install_file(): Target must be on the root filesystem and full path must be provided."
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die 13
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fi
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unset file
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if [[ -d $(dirname $i) ]]; then
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prnt I "Creating required target directory $(dirname $i)..."
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mkdir -pv $(dirname $i)
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if [[ $? -ne 0 ]]; then
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prnt E "install_file(): Can't create target directory!"
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die 12
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fi
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fi
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prnt I "Copying files ${filelist} to target directory $(dirname $i)..."
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cp -av $filelist
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if [[ $? -ne 0 ]]; then
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prnt E "install_file(): Couldn't copy some required files!"
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die 12
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fi
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}
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export -f install_file
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# ------------------------------------------------------------------------------
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# Add the content of a file at the end of an other
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append_file()
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{
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local srcfile=$(select_file $1)
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local dstfile=$2
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if [[ -e $dstfile ]]; then
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prnt E "append_file(): Target must be on the root filesystem and full path must be provided."
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die 13
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fi
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if [[ ! $dstfile == /* ]]; then
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prnt E "append_file(): Target file must exist."
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die 13
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fi
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prnt I "Adding content to file $dstfile..."
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cat $srcfile >> $dstfile
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if [[ $? -ne 0 ]]; then
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prnt E "append_file(): Couldn't append a file!"
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die 12
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fi
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}
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export -f append_file
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# ------------------------------------------------------------------------------
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# determine if a directory is empty
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is_dir_empty()
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{
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dir=$1
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if [[ -f $dir ]]; then
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prnt E "is_dir_empty(): The given parameter is not a directory."
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die 15
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fi
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if [[ ! -d $dir ]]; then
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return 0
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fi
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nbfiles=$(ls -a1 $dir | egrep -v '^.$|^..$' | wc -l)
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if [[ $nbfiles -eq 0 ]]; then
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return 0
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fi
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return 1
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}
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export -f is_dir_empty
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# ------------------------------------------------------------------------------
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# copy and patch a file replacing all @var@ by the corresponding value in
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# the environment or the variable list given in parameter
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patch_file()
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{
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local srcfile=$(select_file $1) && shift
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local dstfile=$1 && shift
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local workfile=${dstfile}.work
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if [[ ! -s $srcfile ]]; then
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prnt E "patch_file(): Source file is empty, is not a file or don't exists!"
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die 10
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fi
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# Create a sub-process, to avoid bash environment pollution
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(
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local varlist= pattern=
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if [[ $# -eq 0 ]] ; then
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pattern="-e s/<\(.*\)>/\$\1\$\1/g"
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else
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local var=
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for var in $* ; do
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if ! declare -p $var >/dev/null 2>&1 ; then
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local $var=$(eval echo \$$var)
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fi
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export $var
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pattern="$pattern -e s/@$var@/\$$var/g"
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varlist=$varlist\$$var
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done
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fi
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# sed replace <VAR> with \$$VAR and envsubst do the replace by value
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sed $pattern $srcfile | envsubst ${varlist:+"$varlist"} > "$workfile"
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)
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local -a rights=( $(stat --printf="%a %u %g" "$srcfile") )
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unset srcfile
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mv "$workfile" "$dstfile"
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chmod ${rights[0]} "$dstfile"
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chown ${rights[1]}:${rights[2]} "$dstfile"
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unset rights dstfile
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}
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export -f patch_file
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# ------------------------------------------------------------------------------
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# Put a small header in a file showing it have been automatically modified
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tag_file()
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{
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for f in $@; do
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local text="# File automatically modified by init.sh on $(stdtime)."
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if [[ -e $f ]]; then
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sed -i "1s/^/$text\n/" $f
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else
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echo $text > $f
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sed -i -e "s/modified/generated/" $f
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fi
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done
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}
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export -f tag_file
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# ------------------------------------------------------------------------------
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# check files exists and return 1 if one do not
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file_exists()
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{
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for f in $@; do
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if [[ ! -f $(select_file $f) ]]; then
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echo $f
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return 1
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fi
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done
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return 0
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}
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export -f file_exists
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# ------------------------------------------------------------------------------
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# check if file exists and return error if not
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file_must_exists()
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{
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prnt I "Checking $@ files existance..."
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local mf=$(file_exists $@)
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if [[ $? -ne 0 ]]; then
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prnt E "file_must_exists(): The $mf file is missing, can't continue."
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die 10
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fi
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unset mf
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}
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export -f file_must_exists
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# ------------------------------------------------------------------------------
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# check files exists and return 1 if one do not
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directory_exists()
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{
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for d in $@; do
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if [[ ! -d $(select_directory $d) ]]; then
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echo $d
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return 1
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fi
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done
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return 0
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}
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export -f directory_exists
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# ------------------------------------------------------------------------------
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# check if file exists and return error if not
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directory_must_exists()
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{
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prnt I "Checking $@ directories existance..."
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local md=$(directory_exists $@)
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if [[ $? -ne 0 ]]; then
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prnt E "directory_must_exists(): The $md directory is missing, can't continue."
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die 10
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fi
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unset md
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}
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export -f directory_must_exists
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# EOF
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