[英]Nested variables not expanding in a bash script in Docker
When using curl on the variable ${download}
, the variable ${tmlversion}
isn't being passed along with it and debug shows that it is blank (debug3).在变量
${download}
上使用 curl 时,变量${tmlversion}
不会与其一起传递,并且调试显示它为空白 (debug3)。 This issue is that right before its being called, the ${tmlversion}
is actually defined as what it should be (debug2) but it still isnt passed through.这个问题是在它被调用之前,
${tmlversion}
实际上被定义为它应该是什么 (debug2) 但它仍然没有通过。
Snippet of the error from Docker:来自 Docker 的错误片段:
debug1 VERSION=2022.09.47.16
debug2 tmlversion=2022.09.47.16
|| TML version is 2022.09.47.16. ||
debug3 download=https://github.com/tModLoader/tModLoader/releases/download/v/tModLoader.zip
|| No server files were detected. Proceeding to download server files. ||
|| Downloading version 2022.09.47.16. ||
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 9 0 9 0 0 50 0 --:--:-- --:--:-- --:--:-- 51
End-of-central-directory signature not found. Either this file is not
a zipfile, or it constitutes one disk of a multi-part archive. In the
latter case the central directory and zipfile comment will be found on
the last disk(s) of this archive.
unzip: cannot find zipfile directory in one of /server/tModLoader.zip or
/server/tModLoader.zip.zip, and cannot find /server/tModLoader.zip.ZIP, period.
...
Here are snippets of code I've tried:以下是我尝试过的代码片段:
#!/usr/bin/env bash
# $VERSION is passed down from Dockerfile. It is currently "2022.09.47.16"
tmlversionlatest=https://github.com/tModLoader/tModLoader/releases/latest/download/tModLoader.zip
tmlversionspecific=https://github.com/tModLoader/tModLoader/releases/download/v${tmlversion}/tModLoader.zip
echo "debug1 VERSION=${VERSION}"
if [ -z "${VERSION}" ]; then
echo "|| Version tag was not specified. Defaulting to latest. ||"
tmlversion=latest
else
tmlversion=${VERSION}
fi
echo "debug2 tmlversion=${tmlversion}"
echo "|| TML version is ${tmlversion}. ||"
if [ "${tmlversion}" = "latest" ]; then
download=${tmlversionlatest}
else
download=${tmlversionspecific}
fi
echo "debug3 download=${download}"
cd /server/
if [ ! -d "/server/Libraries/" ]; then
echo "|| No server files were detected. Proceeding to download server files. ||"
echo "|| Downloading version ${tmlversion}. ||"
curl -LO ${download}
unzip -o /server/tModLoader.zip
rm -r /server/tModLoader.zip
... (anything past this is not important)
and和
#!/usr/bin/env bash
# $VERSION is passed down from Dockerfile. It is currently "2022.09.47.16"
tmlversionlatest=https://github.com/tModLoader/tModLoader/releases/latest/download/tModLoader.zip
tmlversionspecific=https://github.com/tModLoader/tModLoader/releases/download/v${tmlversion}/tModLoader.zip
tmlversion=${VERSION}
echo "|| TML version is ${tmlversion}. ||"
if [ "${tmlversion}" = "latest" ]; then
download=${tmlversionlatest}
else
if [ -z "${tmlversion}" ]; then
echo "|| Version tag was not specified. Defaulting to latest. ||"
download=${tmlversionlatest}
else
echo "debug2 tmlversion=${tmlversion}"
download=${tmlversionspecific}
fi
fi
echo "debug3 download=${download}"
cd /server/
if [ ! -d "/server/Libraries/" ]; then
echo "|| No server files were detected. Proceeding to download server files. ||"
echo "|| Downloading version ${tmlversion}. ||"
curl -LO ${download}
unzip -o /server/tModLoader.zip
rm -r /server/tModLoader.zip
... (anything past this is not important)
Which should be functionally the same but it returns the same error.哪个在功能上应该相同,但它返回相同的错误。
Here's the run down on the code:这是代码的运行:
-e VERSION=(tag)
variable.-e VERSION=(tag)
变量的容器。 SOLUTION: I should have put the ${tmlversion}
variable before the url variables:解决方案:我应该将
${tmlversion}
变量放在 url 变量之前:
# $VERSION is passed down from Dockerfile
tmlversion=${VERSION}
tmlurllatest=https://github.com/tModLoader/tModLoader/releases/latest/download/tModLoader.zip
tmlurlspecific=https://github.com/tModLoader/tModLoader/releases/download/v${tmlversion}/tModLoader.zip
SOLUTION: (From Tripleee) I should have put the ${tmlversion}
variable before the url variables:解决方案:(来自 Tripleee)我应该将
${tmlversion}
变量放在 url 变量之前:
# $VERSION is passed down from Dockerfile
tmlversion=${VERSION}
tmlurllatest=https://github.com/tModLoader/tModLoader/releases/latest/download/tModLoader.zip
tmlurlspecific=https://github.com/tModLoader/tModLoader/releases/download/v${tmlversion}/tModLoader.zip
Based solely on the code snippet provided, a bit of streamlining...完全基于提供的代码片段,有点精简......
#!/usr/bin/env bash
# $VERSION is passed down from Dockerfile. It is currently "2022.09.47.16"
echo "debug1 VERSION=${VERSION}"
if [ -z "${VERSION}" ]; then
echo "|| Version tag was not specified. Defaulting to latest. ||"
download="https://github.com/tModLoader/tModLoader/releases/latest/download/tModLoader.zip"
tmlversion="latest"
else
download="https://github.com/tModLoader/tModLoader/releases/download/v${VERSION}/tModLoader.zip"
tmlversion="${VERSION}"
fi
echo "debug2 tmlversion=${tmlversion}"
echo "debug3 download=${download}"
cd /server/
if [ ! -d "/server/Libraries/" ]; then
echo "|| No server files were detected. Proceeding to download server files. ||"
echo "|| Downloading version ${tmlversion}. ||"
curl -LO "${download}"
... (anything past this is not important)
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