如何从命令行向 REPL 添加导入? [英] How to add imports to REPL from command line?
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问题描述
如何让 REPL 导入命令行中给出的包?
How can I make REPL to import packages given in commnad line?
示例:
scala -someMagicHere "import sys.error"
scala> :imports
1) import scala.Predef._ (162 terms, 78 are implicit)
2) import sys.error (2 terms)
scala> _
PS:它不是重复.我想要自动化的解决方案,而不是每次运行 REPL 时都手动粘贴一些代码.此外,我不想使用 SBT 仅用于在 REPL 启动后在 REPL 中运行一个命令.
PS: It is not a duplicate. I want automated solution, not manually pasting some code every time I run REPL. Also I don't want to use SBT just for running one command in REPL after its start.
推荐答案
我写了一个脚本来自动化命令行参数到文件的事情(基于 A from som-snytt).它在 win 7 上使用 MSYS 进行了测试,但它也可以在 Linux 上运行.
I wrote a script to automatize the command line param to file thing (based on A from som-snytt). It's tested on win 7 with MSYS, but it should work on Linux as well.
bash-3.1$ repl "import sys.error"
Loading C:\Users\xxx\AppData\Local\Temp\tmp.GgEjauEqwz...
import sys.error
Welcome to Scala version 2.10.0 (Java HotSpot(TM) Client VM, Java 1.7.0_07).
Type in expressions to have them evaluated.
Type :help for more information.
scala> :impo
1) import scala.Predef._ (162 terms, 78 are implicit)
2) import sys.error (2 terms)
#!/bin/bash
function crash {
echo "Error: $1"
exit 10
}
if [ $# -ne 1 ]; then
echo "Script requires one parameter."
exit 1
fi
t=$(mktemp) || crash "Unable to create a temp file."
[ ${#t} -lt 1 ] && crash "Suspiciously short file name, aborting."
trap "rm -f -- '$t'" EXIT
echo "$1" > "$t"
scala -i "$t" || crash "Something wrong with scala binary."
rm -f -- "$t"
trap - EXIT
exit
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