问题描述
我正在Linux上使用Bash 4.3.
I am using Bash 4.3 on linux.
我有一个简单的YAML风格的数据文件:
I have this simple YAML-esque data file:
products:
product1:
name: "Product one"
price: 100
product2:
name: "Product two"
price: 200
myList:
- one
- two
我需要一个shell函数，以上面的YAML文件作为输入，可以生成然后执行以下Bash代码:
And I need a shell function that, taking the above YAML file as input, can generate and then execute the below Bash code:
unset products product1 product2
# declare the associative arrays
declare -A product1
declare -A product2
# define the data
product1=(
[name]="Product 1"
[price]=100
)
product2=(
[name]="Product 2"
[price]=200
)
myList=(one two)
# declare the arrays which will contain the names of our associative arrays
products=(product1 product2)
一旦有了这个出色的功能，我将使用YAML文件自动生成数据，以用于我的自定义CMS模板系统中，如下所示:
Once I have this wonderful function, I will use the YAML files to automatically generate data, to be used in my custom CMS templating system like so:
{{#foreach product in products}}
<h3>{{product.name | uppercase}}</h3>
* {{product.price | money_with_currency £ GBP | without_trailing_zeros}}
{{/foreach}}
我已经尝试了各种YAML解析器，但是没有找到可以生成我需要的关联数组的解析器，而有些根本不起作用(至少对我而言):
I have already tried various YAML parsers, but have not found one that can generate the associative arrays that I need, and some simply didn't work at all (for me, at least):
- https://github.com/ArtBIT/bash-yaml
- https://github.com/luodongseu/shyaml
- https://github.com/binaryphile/y2s
- https://github.com/Hashfyre/yamlparser
- https://github.com/ash-shell/yaml-parse
- https://github.com/jasperes/bash-yaml
- https://github.com/mrbaseman/parse_yaml
- https://github.com/azohra/yaml.sh
- https://github.com/Minlison/yaml-parser
- https://gist.github.com/pkuczynski/8665367
- https://github.com/ArtBIT/bash-yaml
- https://github.com/luodongseu/shyaml
- https://github.com/binaryphile/y2s
- https://github.com/Hashfyre/yamlparser
- https://github.com/ash-shell/yaml-parse
- https://github.com/jasperes/bash-yaml
- https://github.com/mrbaseman/parse_yaml
- https://github.com/azohra/yaml.sh
- https://github.com/Minlison/yaml-parser
- https://gist.github.com/pkuczynski/8665367
据我了解，其中大多数使用它们会生成类似product_product1_name="foo"的东西:(
Most of these, as far as I understand their usage generate things like product_product1_name="foo" :(
推荐答案
yaml.sh 您在问题中链接的，是一个出奇的好解析器.将其输出转换为所需的格式比执行其他任何操作都容易得多.
yaml.sh, which you linked in the question, is a surprisingly good parser. It's a lot easier to convert its output into the format you need than to do anything else.
cleanupValue() {
local result
case $1 in
'"'*'"') result=${1#'"'}; result=${result%'"'} ;;
"["*"]") result=${1#'['}; result=${result%']'} ;;
*) result=$1
esac
printf '%s\n' "$result"
}
record_data() {
local key value="$(cleanupValue "$1")"; shift
while (( $# >= 2 )); do
key=$(cleanupValue "$2")
if (( $# > 2 )); then
declare -g -a "$1" || continue
declare -g -A "_${1}__seen" || continue
local -n __array="$1"
local -n __seen_array="_${1}__seen"
if ! [[ ${__seen_array[$key]} ]]; then
__seen_array[$key]=1
__array+=( "$key" )
fi
unset -n __seen_array
else
declare -g -A "$1" || continue # "continue" to skip invalid variable names
local -n __array="$1" || continue
__array[$key]=$value
fi
unset -n __array
shift
done
}
while IFS='=' read -r key value; do
IFS=. read -r -a key_pieces <<<"$key"
record_data "$value" "${key_pieces[@]}"
done < <(ysh -f your.yml)
# demonstrate results
declare -p products product1 product2 myList
...作为输出发出:
...emits as output:
declare -a products=([0]="product1" [1]="product2")
declare -A product1=([price]="100" [name]="Product one" )
declare -A product2=([price]="200" [name]="Product two" )
declare -A myList=([1]="two" [0]="one" )
这篇关于如何将YAML的子集转换为关联数组的索引数组?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！