ffff4ac065
Right now, there's no specific way to determine whether a credential helper or git credential itself supports a given set of capabilities. It would be helpful to have such a way, so let's let credential helpers and git credential take an argument, "capability", which has it list the capabilities and a version number on standard output. Specifically choose a format that is slightly different from regular credential output and assume that no capabilities are supported if a non-zero exit status occurs or the data deviates from the format. It is common for users to write small shell scripts as the argument to credential.helper, which will almost never be designed to emit capabilities. We want callers to gracefully handle this case by assuming that they are not capable of extended support because that is almost certainly the case, and specifying the error behavior up front does this and preserves backwards compatibility in a graceful way. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
44 lines
1.1 KiB
C
44 lines
1.1 KiB
C
#include "git-compat-util.h"
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#include "credential.h"
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#include "builtin.h"
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#include "config.h"
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static const char usage_msg[] =
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"git credential (fill|approve|reject)";
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int cmd_credential(int argc, const char **argv, const char *prefix UNUSED)
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{
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const char *op;
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struct credential c = CREDENTIAL_INIT;
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git_config(git_default_config, NULL);
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if (argc != 2 || !strcmp(argv[1], "-h"))
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usage(usage_msg);
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op = argv[1];
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if (!strcmp(op, "capability")) {
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credential_set_all_capabilities(&c, CREDENTIAL_OP_INITIAL);
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credential_announce_capabilities(&c, stdout);
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return 0;
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}
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if (credential_read(&c, stdin, CREDENTIAL_OP_INITIAL) < 0)
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die("unable to read credential from stdin");
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if (!strcmp(op, "fill")) {
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credential_fill(&c, 0);
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credential_next_state(&c);
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credential_write(&c, stdout, CREDENTIAL_OP_RESPONSE);
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} else if (!strcmp(op, "approve")) {
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credential_set_all_capabilities(&c, CREDENTIAL_OP_HELPER);
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credential_approve(&c);
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} else if (!strcmp(op, "reject")) {
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credential_set_all_capabilities(&c, CREDENTIAL_OP_HELPER);
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credential_reject(&c);
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} else {
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usage(usage_msg);
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}
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return 0;
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}
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