I get this error:
xcrun: error: invalid active developer path (/Applications/Xcode.app), missing xcrun at: /Applications/Xcode.app/usr/bin/xcrun
This solution works, but the error occurs again after closing my terminal and reopening it; I then have to run the same commands every time I open a new terminal window.
How can I apply these changes such that they will save after closing the terminal window out?
Partial diagnosis: https://github.com/microsoft/vcpkg/issues/8781#issuecomment-547248760
It seems that upgrading from one MacOS version to another either uninstalls some dev tools or it moves them to another path, and this breaks compatibility with any tool using the environment variable that points to the old location where the tools were located.
sudo xcode-select --install
Using the install command worked for me, but it is not clear whether this simply downloaded and unpacked files and then skipped installation and simply updated an environment variable or whether it physically installed the files at the expected path. (Or it could have made links to the new folder path).
Testing my theory, I probe the folder structure with ls (I should have done this before using the install command):
rej@Ryans-MacBook-Air:~$ ls /Library/Developer/CommandLineTools/usr/bin/
rej@Ryans-MacBook-Air:~$ ls -la /Library/Developer/CommandLineTools/usr/bin/
total 243776
drwxr-xr-x 124 root wheel 3.9K Oct 28 23:03 ./
drwxr-xr-x 7 root admin 224B Oct 28 23:05 ../
lrwxr-xr-x 1 root wheel 64B Oct 28 23:03 2to3@ -> ../../Library/Frameworks/Python3.framework/Versions/3.7/bin/2to3
lrwxr-xr-x 1 root wheel 68B Oct 28 23:03 2to3-3.7@ -> ../../Library/Frameworks/Python3.framework/Versions/3.7/bin/2to3-3.7
-rwxr-xr-x 1 root wheel 116K Sep 5 22:51 DeRez*
-rwxr-xr-x 1 root wheel 31K Sep 5 22:51 GetFileInfo*
-rwxr-xr-x 1 root wheel 33K Sep 5 22:51 ResMerger*
-rwxr-xr-x 1 root wheel 126K Sep 5 22:51 Rez*
-rwxr-xr-x 1 root wheel 31K Sep 5 22:51 SetFile*
-rwxr-xr-x 1 root wheel 32K Sep 5 22:51 SplitForks*
-rwxr-xr-x 1 root wheel 41K Sep 5 22:51 ar*
-rwxr-xr-x 1 root wheel 40K Sep 5 22:51 as*
-rwxr-xr-x 1 root wheel 27K Sep 5 22:51 asa*
-rwxr-xr-x 1 root wheel 216K Sep 5 22:51 bison*
-rwxr-xr-x 1 root wheel 159K Sep 5 22:51 bitcode_strip*
lrwxr-xr-x 1 root wheel 5B Oct 28 23:03 c++@ -> clang
-rwxr-xr-x 1 root admin 31K Sep 5 22:51 c89*
-rwxr-xr-x 1 root admin 31K Sep 5 22:51 c99*
lrwxr-xr-x 1 root wheel 5B Oct 28 23:03 cc@ -> clang
-rwxr-xr-x 1 root wheel 80M Sep 5 22:51 clang*
lrwxr-xr-x 1 root wheel 5B Oct 28 23:03 clang++@ -> clang
-rwxr-xr-x 1 root wheel 125K Sep 5 22:51 cmpdylib*
-rwxr-xr-x 1 root wheel 154K Sep 5 22:51 codesign_allocate*
lrwxr-xr-x 1 root wheel 17B Oct 28 23:03 codesign_allocate-p@ -> codesign_allocate
-rwxr-xr-x 1 root admin 3.3K Aug 16 06:55 cpp*
-rwxr-xr-x 1 root wheel 36K Sep 5 22:51 ctags*
-rwxr-xr-x 1 root wheel 150K Sep 5 22:51 ctf_insert*
-rwxr-xr-x 1 root wheel 30M Sep 5 22:51 dsymutil*
lrwxr-xr-x 1 root wheel 14B Oct 28 23:03 dwarfdump@ -> llvm-dwarfdump
-rwxr-xr-x 1 root wheel 477K Sep 5 22:51 dwarfdump-classic*
-rwxr-xr-x 1 root wheel 211K Sep 5 22:51 dyldinfo*
-rwxr-xr-x 1 root wheel 239B Sep 5 19:18 easy_install-3.7*
-rwxr-xr-x 1 root wheel 572K Sep 5 22:51 flex*
-rwxr-xr-x 1 root wheel 572K Sep 5 22:51 flex++*
lrwxr-xr-x 1 root wheel 3B Oct 28 23:03 g++@ -> gcc
-rwxr-xr-x 1 root wheel 101K Aug 16 07:31 gatherheaderdoc*
-rwxr-xr-x 1 root admin 27K Sep 5 22:51 gcc*
lrwxr-xr-x 1 root wheel 8B Oct 28 23:03 gcov@ -> llvm-cov
-rwxr-xr-x 1 root wheel 2.4M Sep 5 22:51 git*
lrwxr-xr-x 1 root wheel 3B Oct 28 23:03 git-receive-pack@ -> git
-rwxr-xr-x 1 root wheel 1.4M Sep 5 22:51 git-shell*
lrwxr-xr-x 1 root wheel 3B Oct 28 23:03 git-upload-archive@ -> git
lrwxr-xr-x 1 root wheel 3B Oct 28 23:03 git-upload-pack@ -> git
-rwxr-xr-x 1 root wheel 148K Sep 5 22:51 gm4*
-rwxr-xr-x 1 root wheel 166K Sep 5 22:51 gnumake*
-rwxr-xr-x 1 root wheel 98K Sep 5 22:51 gperf*
-rwxr-xr-x 1 root wheel 33K Sep 5 22:51 hdxml2manxml*
-rwxr-xr-x 1 root wheel 158K Aug 16 07:31 headerdoc2html*
-rwxr-xr-x 1 root wheel 73K Sep 5 22:51 indent*
-rwxr-xr-x 1 root wheel 142K Sep 5 22:51 install_name_tool*
-rwxr-xr-x 1 root wheel 2.5M Sep 5 22:51 ld*
-rwxr-xr-x 1 root wheel 230B Aug 16 07:13 lex*
-rwxr-xr-x 1 root wheel 163K Sep 5 22:51 libtool*
-rwxr-xr-x 1 root wheel 73K Sep 5 22:51 lipo*
-rwxr-xr-x 1 root wheel 332K Sep 5 22:51 lldb*
-rwxr-xr-x 1 root wheel 3.6M Sep 5 22:51 llvm-cov*
-rwxr-xr-x 1 root wheel 7.9M Sep 5 22:51 llvm-dwarfdump*
-rwxr-xr-x 1 root wheel 9.8M Sep 5 22:51 llvm-nm*
-rwxr-xr-x 1 root wheel 11M Sep 5 22:51 llvm-objdump*
-rwxr-xr-x 1 root wheel 40K Sep 5 22:51 llvm-otool*
-rwxr-xr-x 1 root wheel 1.6M Sep 5 22:51 llvm-profdata*
-rwxr-xr-x 1 root wheel 2.9M Sep 5 22:51 llvm-size*
-rwxr-xr-x 1 root wheel 3.5K Aug 16 07:19 lorder*
-rwxr-xr-x 1 root wheel 148K Sep 5 22:51 m4*
-rwxr-xr-x 1 root wheel 166K Sep 5 22:51 make*
-rwxr-xr-x 1 root wheel 7.7K Aug 16 07:16 mig*
lrwxr-xr-x 1 root wheel 7B Oct 28 23:03 nm@ -> llvm-nm
-rwxr-xr-x 1 root wheel 142K Sep 5 22:51 nm-classic*
-rwxr-xr-x 1 root wheel 171K Sep 5 22:51 nmedit*
lrwxr-xr-x 1 root wheel 12B Oct 28 23:03 objdump@ -> llvm-objdump
lrwxr-xr-x 1 root wheel 10B Oct 28 23:03 otool@ -> llvm-otool
-rwxr-xr-x 1 root wheel 644K Sep 5 22:51 otool-classic*
-rwxr-xr-x 1 root wheel 138K Sep 5 22:51 pagestuff*
-rwxr-xr-x 1 root wheel 221B Sep 5 19:18 pip3*
-rwxr-xr-x 1 root wheel 221B Sep 5 19:18 pip3.7*
-rwxr-xr-x 1 root wheel 32K Sep 5 22:51 projectInfo*
lrwxr-xr-x 1 root wheel 66B Oct 28 23:03 pydoc3@ -> ../../Library/Frameworks/Python3.framework/Versions/3.7/bin/pydoc3
lrwxr-xr-x 1 root wheel 68B Oct 28 23:03 pydoc3.7@ -> ../../Library/Frameworks/Python3.framework/Versions/3.7/bin/pydoc3.7
lrwxr-xr-x 1 root wheel 67B Oct 28 23:03 python3@ -> ../../Library/Frameworks/Python3.framework/Versions/3.7/bin/python3
lrwxr-xr-x 1 root wheel 74B Oct 28 23:03 python3-config@ -> ../../Library/Frameworks/Python3.framework/Versions/3.7/bin/python3-config
lrwxr-xr-x 1 root wheel 69B Oct 28 23:03 python3.7@ -> ../../Library/Frameworks/Python3.framework/Versions/3.7/bin/python3.7
lrwxr-xr-x 1 root wheel 76B Oct 28 23:03 python3.7-config@ -> ../../Library/Frameworks/Python3.framework/Versions/3.7/bin/python3.7-config
lrwxr-xr-x 1 root wheel 70B Oct 28 23:03 python3.7m@ -> ../../Library/Frameworks/Python3.framework/Versions/3.7/bin/python3.7m
lrwxr-xr-x 1 root wheel 77B Oct 28 23:03 python3.7m-config@ -> ../../Library/Frameworks/Python3.framework/Versions/3.7/bin/python3.7m-config
lrwxr-xr-x 1 root wheel 66B Oct 28 23:03 pyvenv@ -> ../../Library/Frameworks/Python3.framework/Versions/3.7/bin/pyvenv
lrwxr-xr-x 1 root wheel 70B Oct 28 23:03 pyvenv-3.7@ -> ../../Library/Frameworks/Python3.framework/Versions/3.7/bin/pyvenv-3.7
lrwxr-xr-x 1 root wheel 7B Oct 28 23:03 ranlib@ -> libtool
-rwxr-xr-x 1 root wheel 70K Sep 5 22:51 resolveLinks*
-rwxr-xr-x 1 root wheel 85K Sep 5 22:51 rpcgen*
-rwxr-xr-x 1 root wheel 56K Sep 5 22:51 segedit*
lrwxr-xr-x 1 root wheel 12B Oct 28 23:03 size@ -> size-classic
-rwxr-xr-x 1 root wheel 125K Sep 5 22:51 size-classic*
-rwxr-xr-x 1 root admin 138K Sep 5 22:51 stapler*
-rwxr-xr-x 1 root wheel 126K Sep 5 22:51 strings*
-rwxr-xr-x 1 root wheel 179K Sep 5 22:51 strip*
-rwxr-xr-x 1 root wheel 330K Sep 5 22:51 svn*
-rwxr-xr-x 1 root wheel 118K Sep 5 22:51 svnadmin*
-rwxr-xr-x 1 root wheel 105K Sep 5 22:51 svnbench*
-rwxr-xr-x 1 root wheel 64K Sep 5 22:51 svndumpfilter*
-rwxr-xr-x 1 root wheel 71K Sep 5 22:51 svnfsfs*
-rwxr-xr-x 1 root wheel 98K Sep 5 22:51 svnlook*
-rwxr-xr-x 1 root wheel 70K Sep 5 22:51 svnmucc*
-rwxr-xr-x 1 root wheel 89K Sep 5 22:51 svnrdump*
-rwxr-xr-x 1 root wheel 122K Sep 5 22:51 svnserve*
-rwxr-xr-x 1 root wheel 90K Sep 5 22:51 svnsync*
-rwxr-xr-x 1 root wheel 44K Sep 5 22:51 svnversion*
-rwxr-xr-x 1 root wheel 90M Sep 5 22:51 swift*
lrwxr-xr-x 1 root wheel 5B Oct 28 23:03 swift-autolink-extract@ -> swift
-rwxr-xr-x 1 root admin 6.1M Sep 5 22:51 swift-build*
-rwxr-xr-x 1 root admin 734K Sep 5 22:51 swift-build-tool*
-rwxr-xr-x 1 root wheel 687K Sep 5 22:51 swift-demangle*
lrwxr-xr-x 1 root wheel 5B Oct 28 23:03 swift-format@ -> swift
-rwxr-xr-x 1 root admin 6.1M Sep 5 22:51 swift-package*
-rwxr-xr-x 1 root admin 6.1M Sep 5 22:51 swift-run*
-rwxr-xr-x 1 root wheel 61K Sep 5 22:51 swift-stdlib-tool*
-rwxr-xr-x 1 root admin 6.1M Sep 5 22:51 swift-test*
lrwxr-xr-x 1 root wheel 5B Oct 28 23:03 swiftc@ -> swift
-rwxr-xr-x 1 root wheel 12M Sep 5 22:51 tapi*
-rwxr-xr-x 1 root wheel 41K Sep 5 22:51 unifdef*
-rwxr-xr-x 1 root wheel 2.9K Aug 16 07:19 unifdefall*
-rwxr-xr-x 1 root wheel 63K Sep 5 22:51 unwinddump*
-rwxr-xr-x 1 root wheel 49K Sep 5 22:51 vtool*
-rwxr-xr-x 1 root wheel 45K Sep 5 22:51 xml2man*
-rwxr-xr-x 1 root wheel 135B Aug 16 07:22 yacc*
It is apparent that the files are physically located at that folder location and the installer installed missing components. The fact that MacOS's upgrade process uninstalls my development environment is unfriendly and Apple should be reprimanded.