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59 lines
1.3 KiB
59 lines
1.3 KiB
#include "cache.h" |
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#include "refs.h" |
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#include "builtin.h" |
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static const char git_update_ref_usage[] = |
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"git-update-ref <refname> <value> [<oldval>] [-m <reason>]"; |
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int cmd_update_ref(int argc, const char **argv, char **envp) |
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{ |
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const char *refname=NULL, *value=NULL, *oldval=NULL, *msg=NULL; |
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struct ref_lock *lock; |
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unsigned char sha1[20], oldsha1[20]; |
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int i; |
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setup_git_directory(); |
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git_config(git_default_config); |
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for (i = 1; i < argc; i++) { |
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if (!strcmp("-m", argv[i])) { |
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if (i+1 >= argc) |
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usage(git_update_ref_usage); |
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msg = argv[++i]; |
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if (!*msg) |
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die("Refusing to perform update with empty message."); |
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if (strchr(msg, '\n')) |
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die("Refusing to perform update with \\n in message."); |
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continue; |
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} |
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if (!refname) { |
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refname = argv[i]; |
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continue; |
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} |
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if (!value) { |
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value = argv[i]; |
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continue; |
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} |
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if (!oldval) { |
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oldval = argv[i]; |
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continue; |
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} |
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} |
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if (!refname || !value) |
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usage(git_update_ref_usage); |
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if (get_sha1(value, sha1)) |
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die("%s: not a valid SHA1", value); |
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memset(oldsha1, 0, 20); |
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if (oldval && get_sha1(oldval, oldsha1)) |
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die("%s: not a valid old SHA1", oldval); |
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lock = lock_any_ref_for_update(refname, oldval ? oldsha1 : NULL, 0); |
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if (!lock) |
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return 1; |
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if (write_ref_sha1(lock, sha1, msg) < 0) |
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return 1; |
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/* write_ref_sha1 always unlocks the ref, no need to do it explicitly */ |
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return 0; |
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}
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