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Use getopts for string's helpers

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Maniack Crudelis 2018-12-29 17:58:22 +01:00 • committed by GitHub
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59
data/helpers.d/string
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@ -1,59 +1,74 @@
# Generate a random string
#
# example: pwd=$(ynh_string_random 8)
# example: pwd=$(ynh_string_random --length=8)
#
# usage: ynh_string_random [length]
# | arg: length - the string length to generate (default: 24)
# usage: ynh_string_random [--length=string_length]
# | arg: -l, --length - the string length to generate (default: 24)
ynh_string_random() {
# Declare an array to define the options of this helper.
declare -Ar args_array=( [l]=length= )
local length
# Manage arguments with getopts
ynh_handle_getopts_args "$@"
length=${length:-24}
dd if=/dev/urandom bs=1 count=200 2> /dev/null \
| tr -c -d 'A-Za-z0-9' \
| sed -n 's/\(.\{'"${1:-24}"'\}\).*/\1/p'
| sed -n 's/\(.\{'"$length"'\}\).*/\1/p'
}
# Substitute/replace a string (or expression) by another in a file
#
# usage: ynh_replace_string match_string replace_string target_file
# | arg: match_string - String to be searched and replaced in the file
# | arg: replace_string - String that will replace matches
# | arg: target_file - File in which the string will be replaced.
# | arg: -m, --match_string - String to be searched and replaced in the file
# | arg: -r, --replace_string - String that will replace matches
# | arg: -f, --target_file - File in which the string will be replaced.
#
# As this helper is based on sed command, regular expressions and
# references to sub-expressions can be used
# (see sed manual page for more information)
ynh_replace_string () {
# Declare an array to define the options of this helper.
declare -Ar args_array=( [m]=match_string= [r]=replace_string= [f]=target_file= )
local match_string
local replace_string
local target_file
# Manage arguments with getopts
ynh_handle_getopts_args "$@"
local delimit=@
local match_string=$1
local replace_string=$2
local workfile=$3
# Escape the delimiter if it's in the string.
match_string=${match_string//${delimit}/"\\${delimit}"}
replace_string=${replace_string//${delimit}/"\\${delimit}"}
sudo sed --in-place "s${delimit}${match_string}${delimit}${replace_string}${delimit}g" "$workfile"
sudo sed --in-place "s${delimit}${match_string}${delimit}${replace_string}${delimit}g" "$target_file"
}
# Substitute/replace a special string by another in a file
#
# usage: ynh_replace_special_string match_string replace_string target_file
# | arg: match_string - String to be searched and replaced in the file
# | arg: replace_string - String that will replace matches
# | arg: target_file - File in which the string will be replaced.
# | arg: -m, --match_string - String to be searched and replaced in the file
# | arg: -r, --replace_string - String that will replace matches
# | arg: -t, --target_file - File in which the string will be replaced.
#
# This helper will use ynh_replace_string, but as you can use special
# characters, you can't use some regular expressions and sub-expressions.
ynh_replace_special_string () {
local match_string=$1
local replace_string=$2
local workfile=$3
# Declare an array to define the options of this helper.
declare -Ar args_array=( [m]=match_string= [r]=replace_string= [f]=target_file= )
local match_string
local replace_string
local target_file
# Manage arguments with getopts
ynh_handle_getopts_args "$@"
# Escape any backslash to preserve them as simple backslash.
match_string=${match_string//\\/"\\\\"}
replace_string=${replace_string//\\/"\\\\"}
# Escape any backslash to preserve them as simple backslash.
match_string=${match_string//\\/"\\\\"}
replace_string=${replace_string//\\/"\\\\"}
# Escape the & character, who has a special function in sed.
match_string=${match_string//&/"\&"}
replace_string=${replace_string//&/"\&"}
ynh_replace_string "$match_string" "$replace_string" "$workfile"
ynh_replace_string "$match_string" "$replace_string" "$target_file"
}