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#!/usr/bin/env tclsh
# Load commits history as "sha1 unixtime".
set commits [exec git log unstable {--pretty="%H %at"}]
set raw_tags [exec git tag]
# Load all the tags that are about stable releases.
foreach tag $raw_tags {
if {[string match v*-stable $tag]} {
set tag [string range $tag 1 end-7]
puts $tag
}
if {[regexp {^[0-9]+.[0-9]+.[0-9]+$} $tag]} {
lappend tags $tag
}
}
# For each tag, create a list of "name unixtime"
foreach tag $tags {
set taginfo [exec git log $tag -n 1 "--pretty=\"$tag %at\""]
set taginfo [string trim $taginfo {"}]
lappend labels $taginfo
}
# For each commit, check the amount of code changed and create an array
# mapping the commit to the number of lines affected.
foreach c $commits {
set stat [exec git show --oneline --numstat [lindex $c 0]]
set linenum 0
set affected 0
foreach line [split $stat "\n"] {
incr linenum
if {$linenum == 1 || [string match *deps/* $line]} continue
if {[catch {llength $line} numfields]} continue
if {$numfields == 0} continue
catch {
incr affected [lindex $line 0]
incr affected [lindex $line 1]
}
}
set commit_to_affected([lindex $c 0]) $affected
}
set base_time [lindex [lindex $commits end] 1]
puts [clock format $base_time]
# Generate a graph made of HTML DIVs.
puts {<html>
<style>
.box {
position:absolute;
width:10px;
height:5px;
border:1px black solid;
background-color:#44aa33;
opacity: 0.04;
}
.label {
position:absolute;
background-color:#dddddd;
font-family:helvetica;
font-size:12px;
padding:2px;
color:#666;
border:1px #aaa solid;
border-radius: 5px;
}
#outer {
position:relative;
width:1500;
height:500;
border:1px #aaa solid;
}
</style>
<div id="outer">
}
foreach c $commits {
set sha [lindex $c 0]
set t [expr {([lindex $c 1]-$base_time)/(3600*24*2)}]
set affected [expr $commit_to_affected($sha)]
set left $t
set height [expr {log($affected)*20}]
puts "<div class=\"box\" style=\"left:$left; bottom:0; height:$height\"></div>"
}
set bottom -30
foreach l $labels {
set name [lindex $l 0]
set t [expr {([lindex $l 1]-$base_time)/(3600*24*2)}]
set left $t
if {$left < 0} continue
incr bottom -20
if {$bottom == -210} {set bottom -30}
puts "<div class=\"label\" style=\"left:$left; bottom:$bottom\">$name</div>"
}
puts {</div></html>}
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