Bash Makefile 连接数组
我正在尝试为文件名数组提供一个路径，然后对它们执行某些操作并填充到字符串（格式正确）。这是代码/概念
13 javascripts: setup
14 i=0
15 for source in `ls ${SOURCE_DIR}/js/*.coffee | sed -e "s:^.*\/\(\w*\).coffee:\1:"`; do\
16 sources[i]="--input ${OUTPUT_DIR}/js/$$source.js";\
17 i=$(i+1);\
18 echo "Compiling coffee script: $$source.coffee";\
19 coffee -bo "${OUTPUT_DIR}/js" -c "${SOURCE_DIR}/js/$$source.coffee";\
20 done;\
21 python2 ${CLOSURE_PATH}/bin/calcdeps.py --path ${CLOSURE_PATH}/../\
22 $${sources[0]} --compiler_jar ${CLOSURE_PATH}/bin/compiler.jar\
23 --output_mode compiled > ${OUTPUT_DIR}/compiled.js;
24 echo "Cleaning ${OUTPUT_DIR}/js"
25 @rm -rf ${OUTPUT_DIR}/js
所以，我想将一个数组连接到一个字符串并将其导出到第 21 行上以 python2 开头的命令。问题是我什至无法访问 sources 变量内的任何值。当我用 echo $${sources[0]} 替换第 21 行时，它会输出 --input output/js/main.js这是正确的输入。
该怎么办？另外，如果您能指出 gnu.org 上没有的任何 bash/Makefile 指南（很长 = 耗时），我将不胜感激。我有使用几种语言进行编程的经验，但很少有 bash 的经验，所以在这一点上，这让我笑了。
谢谢。
I'm trying to glob a path for array of filenames, then do something with them and populate to a string (formatted properly). Here's the code/concept
13 javascripts: setup
14 i=0
15 for source in `ls ${SOURCE_DIR}/js/*.coffee | sed -e "s:^.*\/\(\w*\).coffee:\1:"`; do\
16 sources[i]="--input ${OUTPUT_DIR}/js/$source.js";\
17 i=$(i+1);\
18 echo "Compiling coffee script: $source.coffee";\
19 coffee -bo "${OUTPUT_DIR}/js" -c "${SOURCE_DIR}/js/$source.coffee";\
20 done;\
21 python2 ${CLOSURE_PATH}/bin/calcdeps.py --path ${CLOSURE_PATH}/../\
22 ${sources[0]} --compiler_jar ${CLOSURE_PATH}/bin/compiler.jar\
23 --output_mode compiled > ${OUTPUT_DIR}/compiled.js;
24 echo "Cleaning ${OUTPUT_DIR}/js"
25 @rm -rf ${OUTPUT_DIR}/js
So, I want to join an array to a string and export it to the command starting with python2 on line 21. The problem is that I can't even access any value inside the sources variable. When I replace line 21 with echo $${sources[0]}, it outputs the --input output/js/main.js which is the proper input.
What to do? Also, if you could point out any bash/Makefile guides, which aren't on gnu.org (long = time consuming), I'd appreciate it. I have experience with programming with few languages, but very little with bash, so at this point, it makes me laugh.
Thank you.
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尝试
[@]：另请参阅：http://tldp. org/LDP/abs/html/arrays.html
Try
[@]:see also: http://tldp.org/LDP/abs/html/arrays.html
在第 15 行之前插入
以显示执行的命令。您会发现的一个错误（不会影响
${source[0]}）是它无法按照您的预期工作；而是写
- 将美元符号加倍，因为它在 makefile 中，并将括号加倍以获得算术扩展；或者更简单地
获得算术评估。
Insert
before line 15 to display the executed commands. One error (that doesn't affect
${source[0]}) you will spot is thatdoesn't work as you seem to want it to; rather write
- double the dollar sign because it's in a makefile, and double the parentheses to get arithmetic expansion; or even simpler
to get arithmetic evaluation.