diff options
| -rw-r--r-- | Makefile | 3 | ||||
| -rw-r--r-- | patch-id.c | 79 |
2 files changed, 81 insertions, 1 deletions
@@ -35,7 +35,7 @@ PROG= git-update-cache git-diff-files git-init-db git-write-tree \ git-http-pull git-ssh-push git-ssh-pull git-rev-list git-mktag \ git-diff-helper git-tar-tree git-local-pull git-write-blob \ git-get-tar-commit-id git-mkdelta git-apply git-stripspace \ - git-cvs2git git-diff-stages git-rev-parse + git-cvs2git git-diff-stages git-rev-parse git-patch-id all: $(PROG) @@ -121,6 +121,7 @@ git-stripspace: stripspace.c git-cvs2git: cvs2git.c git-diff-stages: diff-stages.c git-rev-parse: rev-parse.c +git-patch-id: patch-id.c git-http-pull: LIBS += -lcurl git-rev-list: LIBS += -lssl diff --git a/patch-id.c b/patch-id.c new file mode 100644 index 000000000..0bd640cc4 --- /dev/null +++ b/patch-id.c @@ -0,0 +1,79 @@ +#include <ctype.h> +#include "cache.h" + +static void flush_current_id(int patchlen, unsigned char *id, SHA_CTX *c) +{ + unsigned char result[20]; + char name[50]; + + if (!patchlen) + return; + + SHA1_Final(result, c); + memcpy(name, sha1_to_hex(id), 41); + printf("%s %s\n", sha1_to_hex(result), name); + SHA1_Init(c); +} + +static int remove_space(char *line) +{ + char *src = line; + char *dst = line; + unsigned char c; + + while ((c = *src++) != '\0') { + if (!isspace(c)) + *dst++ = c; + } + return dst - line; +} + +static void generate_id_list(void) +{ + static unsigned char sha1[20]; + static char line[1000]; + SHA_CTX ctx; + int patchlen = 0; + + SHA1_Init(&ctx); + while (fgets(line, sizeof(line), stdin) != NULL) { + unsigned char n[20]; + char *p = line; + int len; + + if (!memcmp(line, "diff-tree ", 10)) + p += 10; + + if (!get_sha1_hex(p, n)) { + flush_current_id(patchlen, sha1, &ctx); + memcpy(sha1, n, 20); + patchlen = 0; + continue; + } + + /* Ignore commit comments */ + if (!patchlen && memcmp(line, "diff ", 5)) + continue; + + /* Ignore line numbers when computing the SHA1 of the patch */ + if (!memcmp(line, "@@ -", 4)) + continue; + + /* Compute the sha without whitespace */ + len = remove_space(line); + patchlen += len; + SHA1_Update(&ctx, line, len); + } + flush_current_id(patchlen, sha1, &ctx); +} + +static const char patch_id_usage[] = "usage: git-patch-id < patch"; + +int main(int argc, char **argv) +{ + if (argc != 1) + usage(patch_id_usage); + + generate_id_list(); + return 0; +} |