mirror of
https://github.com/git/git.git
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Merge branch 'ml/trace'
* ml/trace: test-lib: unset GIT_TRACE GIT_TRACE: fix a mixed declarations and code warning GIT_TRACE: show which built-in/external commands are executed
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commit
d3ba675aae
@ -615,6 +615,13 @@ git Diffs
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gitlink:git-diff-files[1];
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gitlink:git-diff-tree[1]
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other
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~~~~~
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'GIT_TRACE'::
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If this variable is set git will print `trace:` messages on
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stderr telling about alias expansion, built-in command
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execution and external command execution.
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Discussion[[Discussion]]
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------------------------
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include::README[]
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19
exec_cmd.c
19
exec_cmd.c
@ -1,5 +1,6 @@
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#include "cache.h"
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#include "exec_cmd.h"
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#include "quote.h"
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#define MAX_ARGS 32
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extern char **environ;
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@ -96,9 +97,27 @@ int execv_git_cmd(const char **argv)
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tmp = argv[0];
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argv[0] = git_command;
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if (getenv("GIT_TRACE")) {
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const char **p = argv;
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fputs("trace: exec:", stderr);
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while (*p) {
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fputc(' ', stderr);
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sq_quote_print(stderr, *p);
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++p;
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}
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putc('\n', stderr);
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fflush(stderr);
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}
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/* execve() can only ever return if it fails */
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execve(git_command, (char **)argv, environ);
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if (getenv("GIT_TRACE")) {
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fprintf(stderr, "trace: exec failed: %s\n",
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strerror(errno));
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fflush(stderr);
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}
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argv[0] = tmp;
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}
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return -1;
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25
git.c
25
git.c
@ -11,6 +11,7 @@
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#include "git-compat-util.h"
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#include "exec_cmd.h"
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#include "cache.h"
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#include "quote.h"
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#include "builtin.h"
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@ -120,6 +121,18 @@ static int handle_alias(int *argcp, const char ***argv)
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if (!strcmp(alias_command, new_argv[0]))
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die("recursive alias: %s", alias_command);
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if (getenv("GIT_TRACE")) {
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int i;
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fprintf(stderr, "trace: alias expansion: %s =>",
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alias_command);
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for (i = 0; i < count; ++i) {
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fputc(' ', stderr);
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sq_quote_print(stderr, new_argv[i]);
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}
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fputc('\n', stderr);
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fflush(stderr);
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}
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/* insert after command name */
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if (*argcp > 1) {
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new_argv = realloc(new_argv, sizeof(char*) *
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@ -203,6 +216,18 @@ static void handle_internal_command(int argc, const char **argv, char **envp)
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struct cmd_struct *p = commands+i;
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if (strcmp(p->cmd, cmd))
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continue;
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if (getenv("GIT_TRACE")) {
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int i;
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fprintf(stderr, "trace: built-in: git");
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for (i = 0; i < argc; ++i) {
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fputc(' ', stderr);
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sq_quote_print(stderr, argv[i]);
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}
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putc('\n', stderr);
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fflush(stderr);
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}
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exit(p->fn(argc, argv, envp));
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}
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}
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17
quote.c
17
quote.c
@ -45,6 +45,23 @@ size_t sq_quote_buf(char *dst, size_t n, const char *src)
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return len;
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}
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void sq_quote_print(FILE *stream, const char *src)
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{
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char c;
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fputc('\'', stream);
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while ((c = *src++)) {
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if (need_bs_quote(c)) {
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fputs("'\\", stream);
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fputc(c, stream);
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fputc('\'', stream);
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} else {
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fputc(c, stream);
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}
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}
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fputc('\'', stream);
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}
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char *sq_quote(const char *src)
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{
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char *buf;
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1
quote.h
1
quote.h
@ -29,6 +29,7 @@
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*/
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extern char *sq_quote(const char *src);
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extern void sq_quote_print(FILE *stream, const char *src);
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extern size_t sq_quote_buf(char *dst, size_t n, const char *src);
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/* This unwraps what sq_quote() produces in place, but returns
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@ -28,6 +28,7 @@ unset GIT_DIR
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unset GIT_EXTERNAL_DIFF
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unset GIT_INDEX_FILE
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unset GIT_OBJECT_DIRECTORY
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unset GIT_TRACE
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unset SHA1_FILE_DIRECTORIES
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unset SHA1_FILE_DIRECTORY
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export GIT_AUTHOR_EMAIL GIT_AUTHOR_NAME
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