Hi Steafn,
On Fri, 10 Aug 2018, Stefan Beller wrote:
> This will prove useful in range-diff in a later patch as we will be able to
> differentiate between adding a new file (that line is starting with +++
> and then the file name) and regular new lines.
Very good!
> It could also be useful for experimentation in new patch formats, i.e.
> we could teach git to emit moved lines with lines other than +/-.
>
> Signed-off-by: Stefan Beller <sbel...@google.com>
> ---
> diff.c | 21 +++++++++++++++++----
> diff.h | 5 +++++
> 2 files changed, 22 insertions(+), 4 deletions(-)
>
> diff --git a/diff.c b/diff.c
> index b3cb73eb69a..b75eb085cb3 100644
> --- a/diff.c
> +++ b/diff.c
> @@ -1237,7 +1237,7 @@ static void emit_diff_symbol_from_struct(struct
> diff_options *o,
> struct emitted_diff_symbol *eds)
> {
> static const char *nneof = " No newline at end of file\n";
> - const char *context, *reset, *set, *set_sign, *meta, *fraginfo;
> + const char *context, *reset, *set, *set_sign, *meta, *fraginfo, *first;
> struct strbuf sb = STRBUF_INIT;
>
> enum diff_symbol s = eds->s;
> @@ -1288,7 +1288,9 @@ static void emit_diff_symbol_from_struct(struct
> diff_options *o,
> else if (c == '-')
> set = diff_get_color_opt(o, DIFF_FILE_OLD);
> }
> - emit_line_ws_markup(o, set_sign, set, reset, " ", line, len,
> + first = o->output_indicators[OI_CONTEXT] ?
> + o->output_indicators[OI_CONTEXT] : " ";
> + emit_line_ws_markup(o, set_sign, set, reset, first, line, len,
Instead of doing this over and over again, how about
1) setting o->output_indicators to " " in diff_setup()?
2) passing OI_CONTEXT to emit_line_ws_markup() instead of `first`? I.e.
change it to the index in the output_indicators, with -1 indicating
"none"?
> flags & (DIFF_SYMBOL_CONTENT_WS_MASK), 0);
> break;
> case DIFF_SYMBOL_PLUS:
> @@ -1331,7 +1333,10 @@ static void emit_diff_symbol_from_struct(struct
> diff_options *o,
> set = diff_get_color_opt(o, DIFF_CONTEXT_BOLD);
> flags &= ~DIFF_SYMBOL_CONTENT_WS_MASK;
> }
> - emit_line_ws_markup(o, set_sign, set, reset, "+", line, len,
> +
> + first = o->output_indicators[OI_NEW] ?
> + o->output_indicators[OI_NEW] : "+";
> + emit_line_ws_markup(o, set_sign, set, reset, first, line, len,
> flags & DIFF_SYMBOL_CONTENT_WS_MASK,
> flags & DIFF_SYMBOL_CONTENT_BLANK_LINE_EOF);
> break;
> @@ -1374,7 +1379,9 @@ static void emit_diff_symbol_from_struct(struct
> diff_options *o,
> else
> set = diff_get_color_opt(o, DIFF_CONTEXT_DIM);
> }
> - emit_line_ws_markup(o, set_sign, set, reset, "-", line, len,
> + first = o->output_indicators[OI_OLD] ?
> + o->output_indicators[OI_OLD] : "-";
> + emit_line_ws_markup(o, set_sign, set, reset, first, line, len,
> flags & DIFF_SYMBOL_CONTENT_WS_MASK, 0);
> break;
> case DIFF_SYMBOL_WORDS_PORCELAIN:
> @@ -4876,6 +4883,12 @@ int diff_opt_parse(struct diff_options *options,
> options->output_format |= DIFF_FORMAT_DIFFSTAT;
> } else if (!strcmp(arg, "--no-compact-summary"))
> options->flags.stat_with_summary = 0;
> + else if (skip_prefix(arg, "--output-indicator-new=", &arg))
> + options->output_indicators[OI_NEW] = arg;
> + else if (skip_prefix(arg, "--output-indicator-old=", &arg))
> + options->output_indicators[OI_OLD] = arg;
> + else if (skip_prefix(arg, "--output-indicator-context=", &arg))
> + options->output_indicators[OI_CONTEXT] = arg;
>
> /* renames options */
> else if (starts_with(arg, "-B") ||
> diff --git a/diff.h b/diff.h
> index e1e54256c18..2d4097df1c7 100644
> --- a/diff.h
> +++ b/diff.h
> @@ -194,6 +194,11 @@ struct diff_options {
> FILE *file;
> int close_file;
>
> +#define OI_NEW 0
> +#define OI_OLD 1
> +#define OI_CONTEXT 2
I could imagine that OI_* is too generic a prefix, and that we would want
to have a prefix that is less prone to collide with other global
constants, such as OUTPUT_INDICATOR_*.
Ciao,
Dscho
> + const char *output_indicators[3];
> +
> struct pathspec pathspec;
> pathchange_fn_t pathchange;
> change_fn_t change;
> --
> 2.18.0.865.gffc8e1a3cd6-goog
>
>
