You have to source cvars to use these tools and run these commands in your git Linux kernel directory.
gg
gg does something like
git grep -n -E [other_options] "$(bli2 "$1")"
bli2
bli2() parses a string and transforms it into a more complex extended regexp, which it simply echoes.
To understand how it parses things try these:
bli2 "@V" bli2 "@d" bli2 " " bli2 " "
Note that @V will catch the identifier of a simple local variable, @d will catch a number (even if it's a hex or 1ull), spaces are squeezed and parsed to match optional spaces.
bli2 pattern |
description of what is echoed |
echoed string (literally) |
number of back-references |
any space |
optional space |
[[:space:]]* |
- |
\! |
exclamation mark (because bash otherwise bangs) |
! |
- |
@S |
obligatory space |
[[:space:]]+ |
- |
@V |
identifier |
[[:alpha:]_]+[[:alnum:]_]* |
- |
@K |
identifier in only uppercases |
[[:upper:]_]+[[:upper:][:digit:]_]* |
- |
@Q |
a non-alnumeric |
[^[:alnum:]_] |
- |
@Q2 |
a non-alnumeric or extension to the left of a variable |
[^[:alnum:]_>.] |
- |
@w |
(pointer) member, array |
see `bli2 "@w"' |
1 |
@d |
any number |
bli2 "@d" |
1 |
@n |
any number of lines, subsequent matches on the beginning of the next line |
([^\n]*\n)* |
1 |
\(...\) |
up to 2 nested parentheses |
bli2 "\(...\)" |
2 |
\{...\} |
up to 2 nested curly brackets |
bli2 "\{...\}" |
2 |
\[...\] |
up to 2 nested square brackets |
bli2 "\[...\]" |
2 |
\(-..\) |
characters optionally followed by up to 2 nested parentheses |
bli2 "\(-..\)" |
3 |
\{-..\} |
characters optionally followed by up to 2 nested curly brackets |
bli2 "\{-..\}" |
3 |
\{.8.\} |
up to 8 nested curly brackets |
bli2 "\(.8.\)" |
8 |
@...&|@ |
prior conditions |
bli2 "@...&|@" |
4 |
@&|...@ |
later conditions |
bli2 "@&|...@" |
4 |
@&|...&|@ |
conditions inbetween |
bli2 "@&|...&|@" |
4 |
@branch |
a branch |
bli2 "@branch" |
3 |
@in_branch |
in a branch |
bli2 "@in_branch" |
4 |
gres
I wrote this to do a multiline (git-)grep, See examples. gres does something in the order of:
git grep -E -n -other_opts "$(bli2 "$1")" -- '*.c' '*.h' | sed -n -r "$(ecsed2 "${@:2})"with `gres -B1 -A40 "pattern1" "pattern2" "..."' the `-B1' and `-A40' are passed to git-grep, bli2() parses the first pattern to a extended regexp query. Subsequent patterns are passed to ecsed2() which are used to create a sed script. With this script, sed parses the `git grep' output and prints only the output of which the last - but not prior - patterns matched.
The sed script transforms the first of the `path/to/filename.c-301-' into a vi command, the remainder are removed. Until an end-of-function- or end-of-match-pattern occurs, lines are extended. Any comments are removed. For each match that `git grep' piped to sed, (parsed) matches are displayed if no exclusion pattern matched and the last pattern matched.