我已经成功安装了optipng:
$ brew install optipng
==> Downloading https://downloads.sourceforge.net/project/optipng/OptiPNG/optipng-0.7.5/optipng-0.7.5.tar.gz
Already downloaded: /Library/Caches/Homebrew/optipng-0.7.5.tar.gz
==> Patching
patching file src/optipng/osys.c
==> ./configure --with-system-zlib --prefix=/usr/local/Cellar/optipng/0.7.5 --mandir=/usr/local/Cellar/optipng/0.7.5/share/man
==> make install
/usr/local/Cellar/optipng/0.7.5: 6 files, 156K, built in 2 seconds
但是当我使用命令它时会说:
$ optipng
rbenv: optipng: command not found
The `optipng' command exists in these Ruby versions:
jruby-1.7.10
jruby-1.7.11
jruby-1.7.9
如果我使用此路径/usr/local/Cellar/optipng/0.7.5/bin/optipng
它可以正常工作!!
这与rbenv有关吗?或者为什么optipng命令不是全局的?
$ rbenv global
1.9.3-p429
我还尝试了brew unlink optipng
和brew link optipng
- >同样的错误!
答案 0 :(得分:1)
好的,我发现我的一个项目安装了image_optim_bin
gem,在为所有ruby版本卸载这个gem后,命令终于有效了!
$ gem uninstall image_optim_bin
Remove executables:
advdef, advmng, advpng, advzip, jpegoptim, jpegtran, optipng, pngcrush, pngout
in addition to the gem? [Yn]
Removing advdef
Removing advmng
Removing advpng
Removing advzip
Removing jpegoptim
Removing jpegtran
Removing optipng
Removing pngcrush
Removing pngout
Successfully uninstalled image_optim_bin-0.0.4
打开新终端,现在可以运行:
$ optipng
Synopsis:
optipng [options] files ...
Files:
Image files of type: PNG, BMP, GIF, PNM or TIFF
Basic options:
-?, -h, -help show the extended help
-o <level> optimization level (0-7) [default: 2]
-v run in verbose mode / show copyright and version info