fix tag signing when the key file does not exist This should fail without creating any tag. Before, ssh-keygen(1) would print an error to stderr, but got would create an unsigned tag. ok op@

create and verify tags signed by SSH keys This adds a new -s flag to 'got tag' that specifies the signer identity (for example, a key file) of the tagger. The tag object will include a signature that validates each of the tag object headers and the tag message. Verifying these signed tags requires maintaining an allowed signers file which maps signer identities (i.e. the email address of the tagger) to SSH public keys. See ssh-keygen(1) for more details of the allowed signers file. After creating this file and providing the path to it in got.conf(5) using the allowed_signers option, tags may be verified using with 'got tag -V tag_name'. The return code will be non-zero if a signature fails to verify. ok stsp@

move got_opentempfd() out of lib/diff.c again ok tracey

implement support for commit coloring in got-read-pack for speed ok op, tracey

check return value of RB_INSERT; ok + memleak fix by op@

move got_errors[] table into a single compilation unit (error.c) ok stsp

portable: make UUID includes generic Move the detection of UUID header files to be included portably. This will have no functional effect until MacOS detection is put in place.

portable: remove extraneous strerror_r check On a __GLIBC__ system, we need to use __xpg_strerror_r() -- this is already checked for, so simply one of these checks to reduce code changes from upstream.

for portability, handle errno variations upon open(2) failure with O_NOFOLLOW Problem pointed out by naddy for FreeBSD -portable. Discussed with millert, thomas adam, and naddy.

portable: add FreeBSD support This adds the capability to compile got-portable on FreeBSD.

sterror: use XPG version on GLIBC It looks like autoconf 2.69 will not provide XPG strerror_r even if the appropriate macros are set which request the XPG version. Until this is fixed in autoconf and that version is more widely-adopted, this approach will provide what's required. Originally from Stefan Sperling, tweaked by me.

portable: initial Linux compilation This commit modifies the GoT main branch to be able to compile it under linux.

switch to strerror_r(3) in error.c for thread-safety

introduce got_custom_error array to support multiple errors in flight This is still not thread-safe but at least avoids errors overwriting each other in single-threaded contexts.

add got_error_fmt() got_error_fmt() could eventually replace got_error_path() which has already been used to construct errors with strings that are not actually paths... ok millert@

add got_error_from_errno_fmt() for more flexibility in error messages suggested by and ok millert

use size_t for loop indices to avoid signedness warnings; from emaste@freebsd

fix NULL deref in got_error_from_errno via got_error_uuid (found by jasper)

error.c: use <limits.h> instead of <sys/param.h>

introduce got_error_path()

rename got_error_prefix_errno() to got_error_from_errno()

got_error_set_errno: take a char arg to pass to got_error_prefix_errno $> got rm a got: : No such file or directory becomes $> got rm a got: /path/to/a: No such file or directory

got_error_from_errno -> got_error_prefix_errno also add got_error_prefix_errno2 and got_error_prefix_errno3 which should hopefully all be merged into a single function with variadic args (but can't alloc mem)

error: introduce got_error_prefix_errno for better errno messages

error: fix definition of got_error_from_errno