[OSSTEST PATCH 21/60] history reporting (nfc): Rename some module variables, remove "cache"

[Ian Jackson <ian.jackson@xxxxxxxxxxxxx>]

This makes the code terser and easier to read.  No functional change.

Signed-off-by: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
---
 Osstest/HistoryReport.pm | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/Osstest/HistoryReport.pm b/Osstest/HistoryReport.pm
index a0565b6a..61b1ee8f 100644
--- a/Osstest/HistoryReport.pm
+++ b/Osstest/HistoryReport.pm
@@ -40,7 +40,7 @@ BEGIN {
 
 use POSIX;
 
-our @cache_row_key_cols;
+our @key_cols;
 
 our %cache;
 
@@ -51,11 +51,11 @@ our $rows_previous = 0;
 our $rows_today = 0;
 our $rows_hit = 0;
 
-sub cache_set_key_cols { @cache_row_key_cols = @_; }
+sub cache_set_key_cols { @key_cols = @_; }
 
-sub cache_row_key ($) {
+sub key ($) {
     my ($jr) = @_;
-    return join $; , map { $jr->{$_} } @cache_row_key_cols;
+    return join $; , map { $jr->{$_} } @key_cols;
 }
 
 sub cacheable_fn ($$$) {
@@ -107,7 +107,7 @@ sub cache_read_previous ($) {
            s{\%([0-9a-f]{2})}{ chr hex $1 }ge;
            $ch->{$k} = $_;
        }
-       $cache{cache_row_key($jr)} = $jr;
+       $cache{key($jr)} = $jr;
     }
     close H;
 }
@@ -116,7 +116,7 @@ sub cache_row_lookup_prep ($) {
     my ($jrr) = @_;
 
     $rows_today++;
-    my $cacherow = $cache{cache_row_key($$jrr)};
+    my $cacherow = $cache{key($$jrr)};
     if ($cacherow) {
        $$jrr = $cacherow;
        $rows_hit++;
-- 
2.11.0