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authorDaniel Shahaf <d.s@daniel.shahaf.name>2016-10-31 18:35:19 +0000
committerDaniel Shahaf <d.s@daniel.shahaf.name>2016-10-31 18:35:47 +0000
commit74aa45910b3711622e9eb5ccf8adef9566db6f62 (patch)
treef488a15df38b4b9099ade82fcd4af83b9f034bc4
parent88c42a2ba0f0baa9fd20bb7abddc2ad89b66a508 (diff)
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39786: vcs_info (hg): Use native hexdump implementation instead of external command.
Fixes issue whereby the external command would print "*" for repeated
octets.

Includes comment change, cf 39790.
-rw-r--r--ChangeLog7
-rw-r--r--Functions/VCS_Info/Backends/VCS_INFO_get_data_hg7
-rw-r--r--Functions/VCS_Info/VCS_INFO_hexdump16
-rw-r--r--Functions/VCS_Info/vcs_info1
4 files changed, 28 insertions, 3 deletions
diff --git a/ChangeLog b/ChangeLog
index e08cafd30..9dd63251e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2016-10-31  Daniel Shahaf  <d.s@daniel.shahaf.name>
+
+	* 39786: Functions/VCS_Info/Backends/VCS_INFO_get_data_hg,
+	Functions/VCS_Info/VCS_INFO_hexdump, Functions/VCS_Info/vcs_info:
+	vcs_info (hg): Use native hexdump implementation instead of
+	external command.
+
 2016-10-30  Peter Stephenson  <p.w.stephenson@ntlworld.com>
 
 	* 39777: Src/parse.c, Test/D08cmdsubst.ztst: $() is a valid
diff --git a/Functions/VCS_Info/Backends/VCS_INFO_get_data_hg b/Functions/VCS_Info/Backends/VCS_INFO_get_data_hg
index f35ad5965..69b7db304 100644
--- a/Functions/VCS_Info/Backends/VCS_INFO_get_data_hg
+++ b/Functions/VCS_Info/Backends/VCS_INFO_get_data_hg
@@ -40,9 +40,10 @@ VCS_INFO_adjust
 # Disabled by default anyway, so no harm done.
 if zstyle -t ":vcs_info:${vcs}:${usercontext}:${rrn}" get-revision ; then
     if zstyle -t ":vcs_info:${vcs}:${usercontext}:${rrn}" use-simple \
-            && ( VCS_INFO_check_com hexdump ) && [[ -r ${dirstatefile} ]] ; then
-        # Calling hexdump is (much) faster than hg but doesn't get the local rev
-        r_csetid=$(hexdump -n 20 -e '1/1 "%02x"' ${dirstatefile})
+            && VCS_INFO_hexdump ${dirstatefile} 20 ; then
+        # Calling VCS_INFO_hexdump is (much) faster than hg but doesn't get
+        # the local rev
+        r_csetid=$REPLY
     else
         # Settling for a short (but unique!) hash because getting the full
         # 40-char hash in addition to all the other info we want isn't
diff --git a/Functions/VCS_Info/VCS_INFO_hexdump b/Functions/VCS_Info/VCS_INFO_hexdump
new file mode 100644
index 000000000..11f1c1a50
--- /dev/null
+++ b/Functions/VCS_Info/VCS_INFO_hexdump
@@ -0,0 +1,16 @@
+## vim:ft=zsh
+
+# VCS_INFO_hexdump FILENAME BYTECOUNT
+#
+# Return in $REPLY a hexadecimal representation (lowercase, no whitespace)
+# of the first BYTECOUNT bytes of FILENAME.
+
+if [[ -r $1 ]]; then
+  setopt localoptions nomultibyte extendedglob
+  local val
+  read -k $2 -u 0 val <$1
+  REPLY=${(Lj::)${(l:2::0:)${(@s//)val}//(#m)*/$(( [##16] ##$MATCH ))}}
+else
+  return 1
+fi
+
diff --git a/Functions/VCS_Info/vcs_info b/Functions/VCS_Info/vcs_info
index f13f6b501..c0c1182e6 100644
--- a/Functions/VCS_Info/vcs_info
+++ b/Functions/VCS_Info/vcs_info
@@ -19,6 +19,7 @@ static_functions=(
     VCS_INFO_check_com
     VCS_INFO_formats
     VCS_INFO_get_cmd
+    VCS_INFO_hexdump
     VCS_INFO_hook
     VCS_INFO_maxexports
     VCS_INFO_nvcsformats