Adding upstream version 1.7.2+ds.upstream/1.7.2+ds

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 260 insertions, 0 deletions

diff --git a/examples/common.c b/examples/common.c
new file mode 100644
index 0000000..b068b84
--- /dev/null
+++ b/examples/common.c
@@ -0,0 +1,260 @@
+/*
+ * Utilities library for libgit2 examples
+ *
+ * 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/>.
+ */
+
+
+#include "common.h"
+
+#ifndef _WIN32
+# include <unistd.h>
+#endif
+#include <errno.h>
+
+void check_lg2(int error, const char *message, const char *extra)
+{
+	const git_error *lg2err;
+	const char *lg2msg = "", *lg2spacer = "";
+
+	if (!error)
+		return;
+
+	if ((lg2err = git_error_last()) != NULL && lg2err->message != NULL) {
+		lg2msg = lg2err->message;
+		lg2spacer = " - ";
+	}
+
+	if (extra)
+		fprintf(stderr, "%s '%s' [%d]%s%s\n",
+			message, extra, error, lg2spacer, lg2msg);
+	else
+		fprintf(stderr, "%s [%d]%s%s\n",
+			message, error, lg2spacer, lg2msg);
+
+	exit(1);
+}
+
+void fatal(const char *message, const char *extra)
+{
+	if (extra)
+		fprintf(stderr, "%s %s\n", message, extra);
+	else
+		fprintf(stderr, "%s\n", message);
+
+	exit(1);
+}
+
+int diff_output(
+	const git_diff_delta *d,
+	const git_diff_hunk *h,
+	const git_diff_line *l,
+	void *p)
+{
+	FILE *fp = (FILE*)p;
+
+	(void)d; (void)h;
+
+	if (!fp)
+		fp = stdout;
+
+	if (l->origin == GIT_DIFF_LINE_CONTEXT ||
+		l->origin == GIT_DIFF_LINE_ADDITION ||
+		l->origin == GIT_DIFF_LINE_DELETION)
+		fputc(l->origin, fp);
+
+	fwrite(l->content, 1, l->content_len, fp);
+
+	return 0;
+}
+
+void treeish_to_tree(
+	git_tree **out, git_repository *repo, const char *treeish)
+{
+	git_object *obj = NULL;
+
+	check_lg2(
+		git_revparse_single(&obj, repo, treeish),
+		"looking up object", treeish);
+
+	check_lg2(
+		git_object_peel((git_object **)out, obj, GIT_OBJECT_TREE),
+		"resolving object to tree", treeish);
+
+	git_object_free(obj);
+}
+
+void *xrealloc(void *oldp, size_t newsz)
+{
+	void *p = realloc(oldp, newsz);
+	if (p == NULL) {
+		fprintf(stderr, "Cannot allocate memory, exiting.\n");
+		exit(1);
+	}
+	return p;
+}
+
+int resolve_refish(git_annotated_commit **commit, git_repository *repo, const char *refish)
+{
+	git_reference *ref;
+	git_object *obj;
+	int err = 0;
+
+	assert(commit != NULL);
+
+	err = git_reference_dwim(&ref, repo, refish);
+	if (err == GIT_OK) {
+		git_annotated_commit_from_ref(commit, repo, ref);
+		git_reference_free(ref);
+		return 0;
+	}
+
+	err = git_revparse_single(&obj, repo, refish);
+	if (err == GIT_OK) {
+		err = git_annotated_commit_lookup(commit, repo, git_object_id(obj));
+		git_object_free(obj);
+	}
+
+	return err;
+}
+
+static int readline(char **out)
+{
+	int c, error = 0, length = 0, allocated = 0;
+	char *line = NULL;
+
+	errno = 0;
+
+	while ((c = getchar()) != EOF) {
+		if (length == allocated) {
+			allocated += 16;
+
+			if ((line = realloc(line, allocated)) == NULL) {
+				error = -1;
+				goto error;
+			}
+		}
+
+		if (c == '\n')
+			break;
+
+		line[length++] = c;
+	}
+
+	if (errno != 0) {
+		error = -1;
+		goto error;
+	}
+
+	line[length] = '\0';
+	*out = line;
+	line = NULL;
+	error = length;
+error:
+	free(line);
+	return error;
+}
+
+static int ask(char **out, const char *prompt, char optional)
+{
+	printf("%s ", prompt);
+	fflush(stdout);
+
+	if (!readline(out) && !optional) {
+		fprintf(stderr, "Could not read response: %s", strerror(errno));
+		return -1;
+	}
+
+	return 0;
+}
+
+int cred_acquire_cb(git_credential **out,
+		const char *url,
+		const char *username_from_url,
+		unsigned int allowed_types,
+		void *payload)
+{
+	char *username = NULL, *password = NULL, *privkey = NULL, *pubkey = NULL;
+	int error = 1;
+
+	UNUSED(url);
+	UNUSED(payload);
+
+	if (username_from_url) {
+		if ((username = strdup(username_from_url)) == NULL)
+			goto out;
+	} else if ((error = ask(&username, "Username:", 0)) < 0) {
+		goto out;
+	}
+
+	if (allowed_types & GIT_CREDENTIAL_SSH_KEY) {
+		int n;
+
+		if ((error = ask(&privkey, "SSH Key:", 0)) < 0 ||
+		    (error = ask(&password, "Password:", 1)) < 0)
+			goto out;
+
+		if ((n = snprintf(NULL, 0, "%s.pub", privkey)) < 0 ||
+		    (pubkey = malloc(n + 1)) == NULL ||
+		    (n = snprintf(pubkey, n + 1, "%s.pub", privkey)) < 0)
+			goto out;
+
+		error = git_credential_ssh_key_new(out, username, pubkey, privkey, password);
+	} else if (allowed_types & GIT_CREDENTIAL_USERPASS_PLAINTEXT) {
+		if ((error = ask(&password, "Password:", 1)) < 0)
+			goto out;
+
+		error = git_credential_userpass_plaintext_new(out, username, password);
+	} else if (allowed_types & GIT_CREDENTIAL_USERNAME) {
+		error = git_credential_username_new(out, username);
+	}
+
+out:
+	free(username);
+	free(password);
+	free(privkey);
+	free(pubkey);
+	return error;
+}
+
+char *read_file(const char *path)
+{
+	ssize_t total = 0;
+	char *buf = NULL;
+	struct stat st;
+	int fd = -1;
+
+	if ((fd = open(path, O_RDONLY)) < 0 || fstat(fd, &st) < 0)
+		goto out;
+
+	if ((buf = malloc(st.st_size + 1)) == NULL)
+		goto out;
+
+	while (total < st.st_size) {
+		ssize_t bytes = read(fd, buf + total, st.st_size - total);
+		if (bytes <= 0) {
+			if (errno == EAGAIN || errno == EINTR)
+				 continue;
+			free(buf);
+			buf = NULL;
+			goto out;
+		}
+		total += bytes;
+	}
+
+	buf[total] = '\0';
+
+out:
+	if (fd >= 0)
+		close(fd);
+	return buf;
+}
+