Messages: Refine source field truncation

This MR addresses a longstanding annoyance, at least on the ATLAS side. With our deep stack of AlgTools the component name (with parents) is often longer than the source-field of the message. Since the source-name is truncated at the end we never see which component is actually emitting the message. This MR introduces a new format-specifier ('c') that cuts out the middle part of the source-name while giving priority to the last component in the stack. This way, a message like

InDetSCT_Clusterization.InDetSCT_ConditionsSumm... INFO Database will be used.

becomes

InDetSCT_Clusterization...InDetSCT_TdaqEnabledTool INFO Database will be used.

The abbreviation strategy is as follows:

• If the field-width can accommodate the name of the last component, it will print it preceded by three dots and filling up the remaining width by printing the beginning of the input string
• If the field-width can not even accommodate the last component-name or if no dot is found, it will cut out the middle-part, eg print the beginning of the input string, three dots and the end of the input string

added 1 commit

• 052b6156 - Message.sizeField: Refine documentation

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added 2 commits

• 7779a592 - Fixed formatting
• aa4dbe79 - doc cosmetics

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resolved all threads

assigned to @clemenci

changed milestone to %v34r1

added lhcb-gaudi-head label

• [2020-10-07 16:26] Validation started with lhcb-gaudi-head#2740
• [2020-10-08 00:15] Validation started with lhcb-gaudi-head#2741
• [2020-10-08 10:03] Validation started with lhcb-gaudi-head#2742
• [2020-10-09 00:15] Validation started with lhcb-gaudi-head#2743
• [2020-10-10 00:13] Validation started with lhcb-gaudi-head#2744
• [2020-10-11 00:03] Validation started with lhcb-gaudi-head#2745

approved this merge request

mentioned in commit 4b9d61f0

merged

@wlampl awesome addition!

@clemenci in a next Gaudi version we can fix the default format (and even maybe switch to the new %c):

- "% F%18W%S%7W%R%T %0W%M"
+ "% F%18W%S %7W%R%T %0W%M"

such that WARNING and SUCCESS is not immediately next to the source..., e.g.

- InDetSCT_Clusterization.InDetSCT_ConditionsSumm...WARNING  This is a warning
+ InDetSCT_Clusterization.InDetSCT_ConditionsSumm... WARNING  This is a warning