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Schemdiff tool | ublog

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Motivation

The Neo900 project uses complex schematics that are edited by several people. We keep a revision history in git. For such a collaborative project, it is crucial to coordinate changes and to be able to see exactly what happened when conflicts occur. Unfortunately, it is not always easy to tell from a textual difference what has changed between two versions of schematics. Worse, even small changes can sometimes result in Eeschema producing large numbers of differences.

Eeshow aims to provide a convenient means for visually comparing differences in schematics. Furthermore, by being able to work directly from a git repository and not requiring files to be changed on disk, it helps to streamline the workflow.

Eeshow has evolved from the much older schhist project at Qi-Hardware that provided a collection of scripts that used Eeschema (with the help of Wolfgang Spraul's command-line patches) to render schematics to bitmap images and then to compare these, producing a large HTML table. However, this system was very slow and the approach of using a table would not have scaled to a project as large as Neo900.

Source: https://neo900.org/stuff/werner/tmp/eeshow/