Latest APK fails with wget "unrecognized option" error

[l0b0]

Describe the bug

As above.

To Reproduce Steps to reproduce the behavior:

$ docker run -it docker:stable sh
/ # apk add --no-cache cabal ghc
fetch http://dl-cdn.alpinelinux.org/alpine/v3.10/main/x86_64/APKINDEX.tar.gz
fetch http://dl-cdn.alpinelinux.org/alpine/v3.10/community/x86_64/APKINDEX.tar.gz
(1/3) Installing gmp (6.1.2-r1)
(2/3) Installing libffi (3.2.1-r6)
(3/3) Installing cabal (2.4.1.0-r0)
Executing busybox-1.30.1-r2.trigger
OK: 36 MiB in 18 packages
/ # cabal v2-install pandoc
dieVerbatim: user error (cabal: '/usr/bin/wget' exited with an error:
/usr/bin/wget: unrecognized option: input-file=-
BusyBox v1.30.1 (2019-06-12 17:51:55 UTC) multi-call binary.

Usage: wget [-c|--continue] [--spider] [-q|--quiet] [-O|--output-document
FILE]
[--header 'header: value'] [-Y|--proxy on/off] [-P DIR]
[-S|--server-response] [-U|--user-agent AGENT] [-T SEC] URL...

Retrieve files via HTTP or FTP

--spider Only check URL existence: $? is 0 if exists
-c Continue retrieval of aborted transfer
-q Quiet
-P DIR Save to DIR (default .)
-S Show server response
-T SEC Network read timeout is SEC seconds
-O FILE Save to FILE ('-' for stdout)
-U STR Use STR for User-Agent header
-Y on/off Use proxy
)
/ # cabal --version
cabal-install version 2.4.1.0
compiled using version 2.4.1.0 of the Cabal library 

System informataion

• Arch Linux

[hvr]

In other words, cabal needs the real "GNU Wget" and doesn't like the pseudo wget provided by busybox

I'm not sure what we can do here; to some degree I consider this a packaging issue with the APK as the APK doesn't make sure that either curl or a proper wget is in PATH (cabal checks whether curl exists, if not, falls back to checking whether wget exists, and so on...; or you can force a specific HTTP transport via the --http-transport flag/config setting)

[gbaz]

Is this an arch issue per-se or can one get the real wget from arch too?

I suppose the one thing we could do is add a check on wget that its the real one and not a substitute, but that does feel like a bit much.

[gbaz]

Ah its not arch per-se but Alpine. And it does look from a quick browse that one can install the "real" wget or curl if desired.

[23Skidoo]

Is there a way to detect that the wget exe we've found is impaired?

[hvr]

@23Skidoo a simple heuristic would be invoking wget --version and possibly making sure the string "GNU Wget" is included in the output:

$ wget --version
GNU Wget 1.19.4 built on linux-gnu.

-cares +digest -gpgme +https +ipv6 +iri +large-file -metalink +nls 
+ntlm +opie +psl +ssl/openssl 

Wgetrc: 
    /etc/wgetrc (system)
Locale: 
    /usr/share/locale 
Compile: 
    gcc -DHAVE_CONFIG_H -DSYSTEM_WGETRC="/etc/wgetrc" 
    -DLOCALEDIR="/usr/share/locale" -I. -I../../src -I../lib 
    -I../../lib -Wdate-time -D_FORTIFY_SOURCE=2 -DHAVE_LIBSSL -DNDEBUG 
    -g -O2 -fdebug-prefix-map=/build/wget-Xb5Z7Y/wget-1.19.4=. 
    -fstack-protector-strong -Wformat -Werror=format-security 
    -DNO_SSLv2 -D_FILE_OFFSET_BITS=64 -g -Wall 
Link: 
    gcc -DHAVE_LIBSSL -DNDEBUG -g -O2 
    -fdebug-prefix-map=/build/wget-Xb5Z7Y/wget-1.19.4=. 
    -fstack-protector-strong -Wformat -Werror=format-security 
    -DNO_SSLv2 -D_FILE_OFFSET_BITS=64 -g -Wall -Wl,-Bsymbolic-functions 
    -Wl,-z,relro -Wl,-z,now -lpcre -luuid -lidn2 -lssl -lcrypto -lpsl 
    ftp-opie.o openssl.o http-ntlm.o ../lib/libgnu.a 

Copyright (C) 2015 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
<http://www.gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Originally written by Hrvoje Niksic <hniksic@xemacs.org>.
Please send bug reports and questions to <bug-wget@gnu.org>.

Whereas, for busybox, --version doesn't even seem to exist, and you get a non-zero exitcode with a usage message:

# wget --version
wget: unrecognized option: version
BusyBox v1.27.2 (2017-12-12 10:41:50 GMT) multi-call binary.

Usage: wget [-c|--continue] [--spider] [-q|--quiet] [-O|--output-document FILE]
    [--header 'header: value'] [-Y|--proxy on/off] [-P DIR]
    [-S|--server-response] [-U|--user-agent AGENT] [-T SEC] URL...

Retrieve files via HTTP or FTP

    --spider    Only check URL existence: $? is 0 if exists
    -c      Continue retrieval of aborted transfer
    -q      Quiet
    -P DIR      Save to DIR (default .)
    -S          Show server response
    -T SEC      Network read timeout is SEC seconds
    -O FILE     Save to FILE ('-' for stdout)
    -U STR      Use STR for User-Agent header
    -Y on/off   Use proxy

[rjensen26]

So for wget version for alpine that is using busybox you have to do the following:

 RUN   apk update \                                                                                                                                                                                                                        
  &&   apk add ca-certificates wget \                                                                                                                                                                                                      
  &&   update-ca-certificates   # This line may not do anything

Reference: https://github.com/Yelp/dumb-init/issues/73