melting-pot: handle colored Maven output

When caching successful dependency configurations, we scrape the
dependency:list output from build.log. But if the version of Maven is
relatively new, then colored output might be enabled, potentially hosing
up our rather fragile parsing logic. This commit broadens the regexes
used to work with both colored and colorless dependency:list output.

Author: ctrueden

melting-pot.sh

@@ -478,8 +478,8 @@ resolveSource() {
 # Gets the list of dependencies for the project in the CWD.
 deps() {
   cd "$1" || die "No such directory: $1" 16
-  debug "mvn -DincludeScope=runtime -B dependency:list"
-  local depList="$(mvn -DincludeScope=runtime -B dependency:list)" ||
+  debug "mvn -B -DincludeScope=runtime dependency:list"
+  local depList="$(mvn -B -DincludeScope=runtime dependency:list)" ||
     die "Problem fetching dependencies!" 5
   echo "$depList" | grep '^\[INFO\]    [^ ]' |
     sed 's/\[INFO\]    //' | sed 's/ .*//' | sort
@@ -712,8 +712,8 @@ successLog="$HOME/.cache/scijava/melting-pot/$1.success.log"
 mkdir -p "$(dirname "$successLog")"
 
 # Record dependency configuration of successful build.
-deps=$(grep '^\[INFO\]    ' "$buildLog" |
-  sed -e 's/^.\{10\}//' -e 's/ -- .*//' -e 's/ (\([^)]*\))/-\1/' |
+deps=$(grep '^\[[^ ]*INFO[^ ]*\]    ' "$buildLog" |
+  sed -e 's/^[^ ]* *//' -e 's/ -- .*//' -e 's/ (\([^)]*\))/-\1/' |
   sort | tr '\n' ',')
 if [ -z "$(containsLine "$deps" "$successLog")" ]
 then
@@ -760,6 +760,9 @@ meltDown() {
   # to decide whether to include each component.
   generateHelperScripts
 
+  # NB: We do *not* include -B here, because we want build.sh to preserve
+  # colored output if the version of Maven is new enough. We will take care
+  # elsewhere when parsing it to be flexible about whether colors are present.
   local args="-Denforcer.skip"
 
   # Process the dependencies.