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Standardize layout of blame sample

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This commit is contained in:
Ben Straub 2013-11-04 15:25:26 -08:00
parent 0e1115d287
commit b7bb086b1c
1 changed files with 45 additions and 34 deletions
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79
examples/blame.c
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@ -1,31 +1,25 @@
#include <stdio.h>
#include <git2.h>
#include <stdlib.h>
#include <string.h>
/*
* libgit2 "blame" example - shows how to use the blame API
*
* Written by the libgit2 contributors
*
* To the extent possible under law, the author(s) have dedicated all copyright
* and related and neighboring rights to this software to the public domain
* worldwide. This software is distributed without any warranty.
*
* You should have received a copy of the CC0 Public Domain Dedication along
* with this software. If not, see
* <http://creativecommons.org/publicdomain/zero/1.0/>.
*/
static void check(int error, const char *msg)
{
if (error) {
fprintf(stderr, "%s (%d)\n", msg, error);
exit(error);
}
}
#include "common.h"
static void usage(const char *msg, const char *arg)
{
if (msg && arg)
fprintf(stderr, "%s: %s\n", msg, arg);
else if (msg)
fprintf(stderr, "%s\n", msg);
fprintf(stderr, "usage: blame [options] [<commit range>] <path>\n");
fprintf(stderr, "\n");
fprintf(stderr, " <commit range> example: `HEAD~10..HEAD`, or `1234abcd`\n");
fprintf(stderr, " -L <n,m> process only line range n-m, counting from 1\n");
fprintf(stderr, " -M find line moves within and across files\n");
fprintf(stderr, " -C find line copies within and across files\n");
fprintf(stderr, "\n");
exit(1);
}
/**
* This example demonstrates how to invoke the libgit2 blame API to roughly
* simulate the output of `git blame` and a few of its command line arguments.
*/
static void usage(const char *msg, const char *arg);
int main(int argc, char *argv[])
{
@ -61,12 +55,12 @@ int main(int argc, char *argv[])
opts.flags |= GIT_BLAME_TRACK_COPIES_SAME_COMMIT_COPIES;
else if (!strcasecmp(a, "-L")) {
i++; a = argv[i];
if (i >= argc) check(-1, "Not enough arguments to -L");
check(sscanf(a, "%d,%d", &opts.min_line, &opts.max_line)-2, "-L format error");
if (i >= argc) fatal("Not enough arguments to -L", NULL);
check_lg2(sscanf(a, "%d,%d", &opts.min_line, &opts.max_line)-2, "-L format error", NULL);
}
else {
/* commit range */
if (commitspec) check(-1, "Only one commit spec allowed");
if (commitspec) fatal("Only one commit spec allowed", NULL);
commitspec = a;
}
}
@ -87,11 +81,11 @@ int main(int argc, char *argv[])
}
/* Open the repo */
check(git_repository_open_ext(&repo, ".", 0, NULL), "Couldn't open repository");
check_lg2(git_repository_open_ext(&repo, ".", 0, NULL), "Couldn't open repository", NULL);
/* Parse the end points */
if (commitspec) {
check(git_revparse(&revspec, repo, commitspec), "Couldn't parse commit spec");
check_lg2(git_revparse(&revspec, repo, commitspec), "Couldn't parse commit spec", NULL);
if (revspec.flags & GIT_REVPARSE_SINGLE) {
git_oid_cpy(&opts.newest_commit, git_object_id(revspec.from));
git_object_free(revspec.from);
@ -104,7 +98,7 @@ int main(int argc, char *argv[])
}
/* Run the blame */
check(git_blame_file(&blame, repo, path, &opts), "Blame error");
check_lg2(git_blame_file(&blame, repo, path, &opts), "Blame error", NULL);
/* Get the raw data for output */
if (git_oid_iszero(&opts.newest_commit))
@ -116,8 +110,8 @@ int main(int argc, char *argv[])
{
git_object *obj;
check(git_revparse_single(&obj, repo, spec), "Object lookup error");
check(git_blob_lookup(&blob, repo, git_object_id(obj)), "Blob lookup error");
check_lg2(git_revparse_single(&obj, repo, spec), "Object lookup error", NULL);
check_lg2(git_blob_lookup(&blob, repo, git_object_id(obj)), "Blob lookup error", NULL);
git_object_free(obj);
}
rawdata = git_blob_rawcontent(blob);
@ -158,3 +152,20 @@ int main(int argc, char *argv[])
git_repository_free(repo);
git_threads_shutdown();
}
static void usage(const char *msg, const char *arg)
{
if (msg && arg)
fprintf(stderr, "%s: %s\n", msg, arg);
else if (msg)
fprintf(stderr, "%s\n", msg);
fprintf(stderr, "usage: blame [options] [<commit range>] <path>\n");
fprintf(stderr, "\n");
fprintf(stderr, " <commit range> example: `HEAD~10..HEAD`, or `1234abcd`\n");
fprintf(stderr, " -L <n,m> process only line range n-m, counting from 1\n");
fprintf(stderr, " -M find line moves within and across files\n");
fprintf(stderr, " -C find line copies within and across files\n");
fprintf(stderr, "\n");
exit(1);
}