There's no need to set the fd to -1 on ibufs created with imsg_create(3), and it was probably never needed.

While here also fix a fd leak in got-read-pack. We were dup'ing imsg.fd without closing imsg.fd later; instead just use imsg_get_fd() to extract the file descriptor. Tested by falsifian and Kyle Ackerman, thanks! 'go ahead' stsp@

Also, add tests. This change lets got and related tools work when the git config file has "remote" sections without urls, like this one in one of my git-annex git repositories: [remote "h0-rsync"] annex-rsyncurl = (some url) annex-uuid = (some uuid) skipFetchAll = true Running tog and many got commands there would previously result in: $ tog got-read-gitconfig: gitconfig syntax error tog: gitconfig syntax error The change to got-read-gitconfig.c is by stsp@, with ok from op@ (and now me). Tests ok stsp@.

In preparation for wide sha256 support; stsp@ agrees. Change done mechanically with find . -iname \*.[cy] -exec sam {} + X ,x/<sha1\.h>/i/\n#include <sha2.h>

Most extension allow only for a boolean value so the current behaviour of just sending the extension with a trueish value is fine. However, some extensions that we could eventually support (like "objectformat") have a string value. This is a preparatory step towards that. ok stsp@

Feature requested by naddy. ok naddy, who also suggested some tweaks that will arrive shortly

ok millert, naddy

ok millert

POSIX says the limits defined there are available from <limits.h>, which almost all affected source files already included anyway. ok millert stsp

ok stsp