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1fbdab21bb
Trace output which contains arbitrary strings (e.g., the
arguments to commands which we are running) is always passed
through sq_quote_buf(). That function always adds
single-quotes, even if the output consists of vanilla
characters. This can make the output a bit hard to read.
Let's avoid the quoting if there are no characters which a
shell would interpret. Trace output doesn't necessarily need
to be shell-compatible, but:
- the shell language is a good ballpark for what humans
consider readable (well, humans versed in command line
tools)
- the run_command bits can be cut-and-pasted to a shell,
and we'll keep that property
- it covers any cases which would make the output
visually ambiguous (e.g., embedded whitespace or quotes)
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
84 lines
3.2 KiB
C
84 lines
3.2 KiB
C
#ifndef QUOTE_H
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#define QUOTE_H
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struct strbuf;
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/* Help to copy the thing properly quoted for the shell safety.
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* any single quote is replaced with '\'', any exclamation point
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* is replaced with '\!', and the whole thing is enclosed in a
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* single quote pair.
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*
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* For example, if you are passing the result to system() as an
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* argument:
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*
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* sprintf(cmd, "foobar %s %s", sq_quote(arg0), sq_quote(arg1))
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*
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* would be appropriate. If the system() is going to call ssh to
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* run the command on the other side:
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*
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* sprintf(cmd, "git-diff-tree %s %s", sq_quote(arg0), sq_quote(arg1));
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* sprintf(rcmd, "ssh %s %s", sq_quote(host), sq_quote(cmd));
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*
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* Note that the above examples leak memory! Remember to free result from
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* sq_quote() in a real application.
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*
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* sq_quote_buf() writes to an existing buffer of specified size; it
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* will return the number of characters that would have been written
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* excluding the final null regardless of the buffer size.
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*
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* sq_quotef() quotes the entire formatted string as a single result.
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*/
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extern void sq_quote_buf(struct strbuf *, const char *src);
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extern void sq_quote_argv(struct strbuf *, const char **argv);
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extern void sq_quotef(struct strbuf *, const char *fmt, ...);
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/*
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* These match their non-pretty variants, except that they avoid
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* quoting when there are no exotic characters. These should only be used for
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* human-readable output, as sq_dequote() is not smart enough to dequote it.
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*/
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void sq_quote_buf_pretty(struct strbuf *, const char *src);
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void sq_quote_argv_pretty(struct strbuf *, const char **argv);
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/* This unwraps what sq_quote() produces in place, but returns
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* NULL if the input does not look like what sq_quote would have
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* produced.
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*/
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extern char *sq_dequote(char *);
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/*
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* Same as the above, but can be used to unwrap many arguments in the
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* same string separated by space. Like sq_quote, it works in place,
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* modifying arg and appending pointers into it to argv.
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*/
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extern int sq_dequote_to_argv(char *arg, const char ***argv, int *nr, int *alloc);
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/*
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* Same as above, but store the unquoted strings in an argv_array. We will
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* still modify arg in place, but unlike sq_dequote_to_argv, the argv_array
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* will duplicate and take ownership of the strings.
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*/
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struct argv_array;
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extern int sq_dequote_to_argv_array(char *arg, struct argv_array *);
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extern int unquote_c_style(struct strbuf *, const char *quoted, const char **endp);
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extern size_t quote_c_style(const char *name, struct strbuf *, FILE *, int no_dq);
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extern void quote_two_c_style(struct strbuf *, const char *, const char *, int);
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extern void write_name_quoted(const char *name, FILE *, int terminator);
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extern void write_name_quoted_relative(const char *name, const char *prefix,
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FILE *fp, int terminator);
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/* quote path as relative to the given prefix */
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extern char *quote_path_relative(const char *in, const char *prefix,
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struct strbuf *out);
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/* quoting as a string literal for other languages */
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extern void perl_quote_buf(struct strbuf *sb, const char *src);
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extern void python_quote_buf(struct strbuf *sb, const char *src);
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extern void tcl_quote_buf(struct strbuf *sb, const char *src);
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extern void basic_regex_quote_buf(struct strbuf *sb, const char *src);
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#endif
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