Posted October 26, 2015 at 1:22 pm by Heidi & filed under Build Notes. (Build b807) – 23 Oct 2015. Updated MISRA 2008 rule 8-0-1 and All Check script. Alternatives to Understand for Windows, Linux, Mac, Self-Hosted, Web and more. Filter by license to discover only free or Open Source alternatives. This list contains a total of 8 apps similar to Understand. List updated: 5/24/2019 7:46:00 PM.
Understand is a customisable integrated development environment (IDE) that enables static code analysis through an array of visuals, documentation, and metric tools.[2] It was built to help software developers comprehend, maintain, and document their source code. It enables code comprehension by providing flow charts of relationships and building a dictionary of variables and procedures from a provided source code.[3]
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Features[edit]
In addition to functioning as an integrated development environment, Understand provides tools for metrics and reports, standards testing, documentation, searching, graphing, and code knowledge. It is capable of analyzing projects with millions of lines of code and works with code bases written in multiple languages.[4] Developed originally for Ada, it now supports development in several common programming languages.[5] Integration with the Eclipse development environment is also supported.
Applications[edit]
Understand has been used globally for government, commercial, and academic use. It is used in many different industries to both analyze and develop software. Specific uses include a variety of applications: code validation for embedded systems,[3] software litigation consulting,[6] reverse engineering and documentation,[7] and source code change analysis.[8]
References[edit]
External links[edit]
Retrieved from 'https://en.wikipedia.org/w/index.php?title=Understand_(software)&oldid=864529852'
srccheck: a utility to KALOI (Keep a Lid On It) source code on various metrics supported by SciTools Understand.
You can use srccheck to fail your build (say in Jenkins) if a specific metric goes beyond a threshold you define.It could be routine cyclomatic complexity, it could be max number of methods in a class, and so on. Basically anyUnderstand Metric can be used. And it supports many programminglanguages (Java, C++, Python, etc).
NOTE: There is one extra metric that Understand does not have natively but we do support: CountParams, for routines/functions/methods.It represents the number of parameters a routine/function/method takes.
Beyond that, you can keep a trend dashboard of your metrics over time. For that, you need to have Jenkins installedand its Plot Plugin installed as well. srccheck cangenerate the CSV file that this plugin requires (see our --outputCSV= command-line parameter).
For a radial (kiviat) view of the current values and the max values of the metrics, the script also outputs a pngwith the same name as the UDB file (just different file extension). Here is an example:
If the green values are higher, you are ok. If the orange values are higher, you blew past the maximum allowed value for the metric.
Note that the exit code of srccheck is the number of violations found. This allows you to incorporate srccheckinto your workflow regardless of the build tool used.
If you want to publish some metrics as a dashboard in SONAR, you can also do it. For that, you must firstregister your custom metrics in SONAR, which will differ in versions prior to 5.2 and after 5.2:
SONAR 5.1 and below
You need to set up Manual Measures in SONAR and srccheck will use its Manual Measures API.The steps are:
SONAR 5.2 and above
You need to set up Custom Measures in SONAR and srccheck will use this API.The steps are:
NOTE: you can also break your build using SONAR's Build Breaker Plugin if you prefer.
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Make sure your Python has paver installed (pip3 install paver) and then run:
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Under Linux, some users reported that you need to install some libraries before running:
You can generate a self-contained executable that does not need a python interpreter on the target machine:
Now your dist directory should have a standalone native executable which you can copy to a different machine.
This utility is also provided as a Docker image. Usage documentation can be accessed here.
Execute srccheck --help to see what the options are. Basically we take 4 different JSONs as input, which define:
These JSONs are each a dictionary, where each key is the name of the metric and the value is the maximum value it can take.Anything above is considered a violation.
NOTE: instead passing literal json values you can also pass file paths to json files.
Here is an example used to analyze Delphi code:
(Note that under the Windows shell you need to escape each ' with a , as we show above).
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If the command above fails, you may need to pass an appropriate --dllDir value. Or set PATH and PYTHONPATH:
Here is an example that analyzes C++ code, using the defaults we provide:
Here is a full example which installs srccheck in your global Python interpreter, gets SciTools Understand, gets the source code for junit,invokes understand on its sources and then our tool:
(Note that under the Linux shell you need to single-quote the json values and there is no need to escape each ' with a like you do under Windows)
Understand does provide some metrics for averages. The problem is that these do not take into account our whitelist orblacklist of files. Also, not all metrics have Stdev, Avg etc equivalents. In order to fix this we added support tocompute a few derived stats metrics on any existing metric, using prefixes. They are:
Scanjet 2400 driver free download. Example: {CyclomaticModified':10, 'STDEV:CyclomaticModified':1.8, 'AVG:CyclomaticModified':2.2}
The example above will raise an issue if the maximum CyclomaticModified goes above 10, but also ifthe average goes above 2.2 or the standard deviation goes above 1.8. This allows you to control notonly maximum values of your outliers, but also averages and the spread (how far off they spread).We use the stats functions in https://docs.python.org/3/library/statistics.html .
There are currently 2 synthetic metrics not directly supported by Understand but supported by srccheck:
As you evolve your code and improve your metrics, the max values used in the command-lineto srchcheck will probably need to be revisited and adjusted, to keep your metric improvementinitiative steady. This process requires adjusting build scripts, and can be tedious. Because ofthis, srccheck has adaptive support: it automatically lowers the maximum value accepted forthe metric to the new, improved value, every time you manage to lower the current max value of that metric.
To make use of this feature, you will need two things:
The json files will be modified in-place by srccheck with the new max limits, lowering the ones you managed to lower.You are using srccheck to 'lower the lid' of your KALOI initiative. Example:
If you run the command above and maxFileMetrics.json has this in it: {'AVG:CountDeclClass': 999, 'CountDeclClass': 999, 'STDEV:CountDeclClass': 999}then after the run it will look like this: {'AVG:CountDeclClass': 3.3, 'CountDeclClass': 30, 'STDEV:CountDeclClass': 5.78013840664737}
If we manage to lower the maximum number of classes a file can have (CountDeclClass) from 30 to 28, then 28 willautomatically become the new maximum acceptable value for this metric, thanks to the -a flag.
Sometimes metric values are very high and we want to visualize how the values are spread and their frequencies.With that in mind we added support to generate histograms from srccheck. The relevant flags are:
PNG files will be generated in the current dir, with the various histograms.
If you just want to see the histograms without worrying about metric limits, the srchistplot toolis bundled in and can be used - it plots histograms of the values foundfor the metric(s) you choose. It is similar to srccheck to run, with some minor differences. One of them is thatyou pass a comma-separated list of metric names for File, Class and Routine (and not max values as a json, aswith srccheck itself). It also takes these same flags as above: -l , -m.
Here's how to just plot histograms for some metrics for the Django project:
One of the files that the line above will output will look like this:
If you want to see how 2 metrics correlate, you can produce a scatter plot with thesrcscatterplot tool, also bundled in. It accepts a JSON (literal or file path) where keysare scope names (either File or Class or Routine) and an arrays of configs (so you can generatemultiple plots for each scope). Each config should have these keys (all optional, with defaults):
NOTE: for the Min Values above, an element will only be discarded if all 3 metrics (x, y, ball) are all belowtheir corresponding minimal values.
Here's an example for Django sources, using the defaults:
The plot will be an html file, interactive - you can roll your mouse on a circleand it will show which element that is. (Not above - that's a screenshot).
Two items will have the same color if they belong to files in the same directory.This means that colors represent clustering/packaging, usually.
Run srcscatterplot -h to see details for the parameters it can take.
Cancel spotify premium on iphone app. Bob Martin's whitepaper 'OO Design Quality Metrics - An Analysis of Dependencies' describestwo metrics - Instability and Abstractness - and how a good arquitecture should looklike in such a graph. Some tools like PHP_Depend have support for it, as shown athttps://pdepend.org/documentation/handbook/reports/abstraction-instability-chart.html
We include a utility that can take a CSV as input, containing these values, and canplot such a graph: srcinstplot. Example:
The CSV file should look like this:
The Component column will have the names of your components - package names (Java) or namespace names (C#) or Units (Pascal).The second and third column can have any names - they should represent metrics for Size (circle sizes in the graph)and Complexity (circle colors in the graph).
The result should look like the graph below.
If you roll the mouse on the circles, their names are shown, as well as the metrics that represent the circle size andthe circle color. Run the utility with -h for a detailed description of the parameters.
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We also have a tool - geninstability - which generates such CSV files from an Understand UDB file, but it is not Open Source.Feel free to contact us if you would like to use it. On the other hand, if your system is written in Java, you can producean XML with the data using JDepend and convert from it to a CSV using the included jd2csv and totally bypass Understand.
Considering that the bigger the distance from the mean diagonal line the worse the situation, you may want to visualizethe distances in a histogram, to properly prioritize the refactorings. A sample histogram can be seen below:
It was generated as follows:
You can enforce the KALOI principle for OO Instability and Abstractness by using the csvkaloi utility on the csv produced by geninstability:
The command above defines that 50% of your components (MEDIAN) should not be too far from the main line - 40% distance, maximum.Restricting the MEDIAN (and possibly the standard deviation - STDEV:) one can ensure a good use of APIs and the Dependency Inversion Principle.
'How do projects get late? One day at a time!' https://en.wikipedia.org/wiki/The_Mythical_Man-Month Virtual dj timecode.
And how do projects become legacies and a big ball of mud? One commit at a time!
In order to help you keep an eye on what changed from one version to another, we addedthe ability to plot what changed from one version of your sofware to another, by pointingat two different UDB files which represent the before & after states.
The example below shows what changed in lines of code (CountLineCode) of methodsfrom JUnit 4.9 to 4.12. If the metric increased, it will be in red and above the diagonal.If the metric decreased, it will be in green and below the diagonal. If you hover onthe circles it will show the name of the element (not active below - it's just a screenshot).
The plot was generated like this:
If you run srcdiffplot with -h it will show you all the parameters.
In order to generate different UDBs from different git tags, you can do this:
A kiviat is also generated, for project metrics: use the --prjMetrics parameter. In the case of comparing jUnit 4.9 against 4.12, we get this kiviat:
The tool will also print project growth rates for the metrics you selected with the --prjMetrics parameter. Example:
These rates can also be posted to SONAR, using the --sonarPrj parameter. If you want to break the build if the growth rate of a metric is too large, you can use the Build Breaker Plugin.Note that first you will need to create custom measures as explained at the top of this document, for srccheck. Make sure to create them of kind Size and type FLOAT in SONAR.The metric key names for diffs should be:
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where XXX is the name of the metric for SciTools Understand, all lowercase. Example: prj_avgcyclomatic_growth_rate for diffs of AvgCyclomatic.
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We would like to thank Softplan (Anderson Soffa) and Nexxera (Gustavo Soares) for their partial support of the development of these utilities.
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