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SubjectRe: [PATCH -v2] scipts/tags.sh: Add custom sort order
On Thu, Sep 03, 2020 at 09:26:04AM +0200, peterz@infradead.org wrote:
> On Thu, Sep 03, 2020 at 11:07:28AM +0900, Masahiro Yamada wrote:

> > Will re-implementing your sorting logic
> > in bash look cleaner?
>
> Possibly, I can try, we'll see.

It is somewhat cleaner, but it is _abysmally_ slow. Bash sucks :-(

It is still broken in all the same ways as before, I figured I'd get it
'working' first.

---
diff --git a/scripts/tags.sh b/scripts/tags.sh
index 32d3f53af10b..ec2688b3441a 100755
--- a/scripts/tags.sh
+++ b/scripts/tags.sh
@@ -239,10 +239,65 @@ setup_regex()
done
}

+sort_tags()
+{
+ export LC_ALL=C
+
+ # start concurrent sort
+ coproc sort
+ # HACK, clone sort output into 3 to ensure we can still read it
+ # after sort terminates
+ exec 3<&${COPROC[0]}
+
+ while read tag file rest;
+ do
+ local tmp=${rest#*;\"}
+
+ case "${tmp:1:1}" in # Precedence for 'C' kinds
+
+ c) order="A";; # classes
+ s) order="B";; # structure names
+ t) order="C";; # typedefs
+ g) order="D";; # enumeration names
+ u) order="E";; # union names
+ n) order="F";; # namespaces
+
+ f) order="G";; # function definitions
+ p) order="H";; # function prototypes
+ d) order="I";; # macro definitions
+
+ e) order="J";; # enumerators (values inside an enumeration)
+ m) order="K";; # class, struct and union members
+ v) order="L";; # variable definitions
+
+ l) order="M";; # local variables [off]
+ x) order="N";; # external and forward variable declarations
+
+ *) order="Z";;
+
+ esac
+
+ # write to sort with a new sort-key prepended
+ echo "${tag}${order} ${tag} ${file} ${rest}" >&${COPROC[1]}
+ done
+
+ # close sort input
+ exec {COPROC[1]}>&-
+
+ # consume sort output
+ while read -u 3 key line;
+ do
+ # strip the sort-key
+ echo "${line}"
+ done
+}
+
exuberant()
{
+ (
+
setup_regex exuberant asm c
- all_target_sources | xargs $1 -a \
+ all_target_sources | xargs $1 \
-I __initdata,__exitdata,__initconst,__ro_after_init \
-I __initdata_memblock \
-I __refdata,__attribute,__maybe_unused,__always_unused \
@@ -256,12 +311,16 @@ exuberant()
-I DEFINE_TRACE,EXPORT_TRACEPOINT_SYMBOL,EXPORT_TRACEPOINT_SYMBOL_GPL \
-I static,const \
--extra=+fq --c-kinds=+px --fields=+iaS --langmap=c:+.h \
+ --sort=no -o - \
"${regex[@]}"

setup_regex exuberant kconfig
- all_kconfigs | xargs $1 -a \
+ all_kconfigs | xargs $1 \
+ --sort=no -o - \
--langdef=kconfig --language-force=kconfig "${regex[@]}"

+ ) | sort_tags > tags
+
}

emacs()
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