From: Linus Torvalds Date: Fri, 6 May 2005 17:03:17 +0000 (-0700) Subject: diff-tree: support list if input trees on stdin X-Git-Tag: v0.99~624 X-Git-Url: https://git.verplant.org/?a=commitdiff_plain;h=e0965d83c533e8b6a51f1c6c1be12f5edee5ca65;p=git.git diff-tree: support list if input trees on stdin This means that you can do git-rev-list HEAD --max-count=10 | git-diff-tree --stdin update-cache.c to see which (if any) of the last ten commits changed update-cache.c. Use the "-m" flag to see merges too. Normally they are suppressed. --- diff --git a/diff-tree.c b/diff-tree.c index c689c61c..9e15b706 100644 --- a/diff-tree.c +++ b/diff-tree.c @@ -1,7 +1,10 @@ +#include #include "cache.h" #include "diff.h" +static int ignore_merges = 1; static int recursive = 0; +static int read_stdin = 0; static int line_termination = '\n'; static int generate_patch = 0; @@ -250,20 +253,67 @@ static int diff_tree_sha1(const unsigned char *old, const unsigned char *new, co return retval; } +static int diff_tree_stdin(char *line) +{ + int len = strlen(line); + unsigned char commit[20], parent[20]; + unsigned long size, offset; + char *buf; + + if (!len || line[len-1] != '\n') + return -1; + line[len-1] = 0; + if (get_sha1_hex(line, commit)) + return -1; + if (isspace(line[40]) && !get_sha1_hex(line+41, parent)) { + line[40] = ' '; + line[81] = 0; + printf("%s:\n", line); + return diff_tree_sha1(parent, commit, ""); + } + buf = read_object_with_reference(commit, "commit", &size, NULL); + if (!buf) + return -1; + + /* More than one parent? */ + if (ignore_merges) { + if (!memcmp(buf + 46 + 48, "parent ", 7)) + return 0; + } + + line[40] = 0; + offset = 46; + while (offset + 48 < size && !memcmp(buf + offset, "parent ", 7)) { + if (get_sha1_hex(buf + offset + 7, parent)) + return -1; + printf("%s %s:\n", line, sha1_to_hex(parent)); + diff_tree_sha1(parent, commit, ""); + offset += 48; + } + return -1; +} + static char *diff_tree_usage = "diff-tree [-p] [-r] [-z] "; int main(int argc, char **argv) { + char line[1000]; unsigned char old[20], new[20]; for (;;) { - char *arg = argv[1]; + char *arg; + argv++; + argc--; + arg = *argv; if (!arg || *arg != '-') break; - argv++; - argc--; + if (!strcmp(arg, "-")) { + argv++; + argc--; + break; + } if (!strcmp(arg, "-r")) { recursive = 1; continue; @@ -276,21 +326,39 @@ int main(int argc, char **argv) line_termination = '\0'; continue; } + if (!strcmp(arg, "-m")) { + ignore_merges = 0; + continue; + } + if (!strcmp(arg, "--stdin")) { + read_stdin = 1; + continue; + } usage(diff_tree_usage); } - if (argc < 3 || get_sha1(argv[1], old) || get_sha1(argv[2], new)) - usage(diff_tree_usage); + if (!read_stdin) { + if (argc < 2 || get_sha1(argv[0], old) || get_sha1(argv[1], new)) + usage(diff_tree_usage); + argv += 2; + argc -= 2; + } - if (argc > 3) { + if (argc > 0) { int i; - paths = &argv[3]; - nr_paths = argc - 3; + paths = argv; + nr_paths = argc; pathlens = xmalloc(nr_paths * sizeof(int)); for (i=0; i