C++ namespaces, directories and header guards from ignition to gz

[methylDragon]

Description

This issue tracks the conversion of C++ namespaces from ignition to gz.

Example PRs:

• [ign to gz] C++ namespaces gazebosim/gz-utils#50
• [ign to gz] C++ namespaces gazebosim/gz-plugin#75

Be sure to use this trick:

namespace [[deprecated]] ignition {
  using namespace gz;
}

Status Tracker

(Some of these might be excluded, but I'm just listing the full list first!)

Header Migration

There's a script to automate the process for the most part, but some manual work has to be done: #712
See the script PR for the caveats and a point in the right direction for what manual work has to be done (and why!)

It helps to do this in topological order!

• 6: ign-cmake ign -> gz Header Migration : ign-cmake gazebosim/gz-cmake#243
• 6: ign-utils ign -> gz Header Migration : ign-utils gazebosim/gz-utils#53
  • Followup: ign -> gz Header Migration : ign-utils (2) gazebosim/gz-utils#55
• 5: ign-math ign -> gz Header Migration : ign-math gazebosim/gz-math#413
  • Followup: ign -> gz Header Migration : ign-math (2) gazebosim/gz-math#419
• 5: ign-tools (NO CHANGES REQUIRED)
• 4: ign-plugin ign -> gz Header Migration : ign-plugin gazebosim/gz-plugin#79
• 4: ign-msgs ign -> gz Header Migration : ign-msgs gazebosim/gz-msgs#249
• 4: ign-common ign -> gz Header Migration : ign-common gazebosim/gz-common#348
• 3: sdformat ign -> gz Header Migration : sdformat gazebosim/sdformat#1008
• 3: ign-transport ign -> gz Header Migration : ign-transport gazebosim/gz-transport#310
• 3: ign-rendering ign -> gz Header Migration : ign-rendering gazebosim/gz-rendering#618
• 2: ign-physics ign -> gz Header Migration : ign-physics gazebosim/gz-physics#346
• 2: ign-sensors ign -> gz Header Migration : gz-sensors gazebosim/gz-sensors#221
• 2: ign-gui ign -> gz Header Migration : gz-gui gazebosim/gz-gui#395
• 2: ign-fuel-tools ign -> gz Header Migration : ign-fuel-tools gazebosim/gz-fuel-tools#248
• 1: ign-gazebo ign -> gz Header Migration : gz-sim gazebosim/gz-sim#1477
• 0: ign-launch ign -> gz Header Migration : gz-launch gazebosim/gz-launch#162

Namespacing Narrowed

• 6: gz-cmake ign -> gz Namespace Migration : gz-cmake gazebosim/gz-cmake#256
  • Followup: ign -> gz Namespace Migration (2) : gz-cmake gazebosim/gz-cmake#260
• 6: gz-utils ign -> gz Namespace Migration : gz-utils gazebosim/gz-utils#61
• 5: gz-math ign -> gz Namespace migration (narrow) : gz-math  gazebosim/gz-math#431
• 5: gz-tools Standardize config macros gazebosim/gz-tools#90 (No changes to namespaces)
• 4: gz-plugin ign -> gz Namespace migration (narrow) : gz-plugin gazebosim/gz-plugin#84
• 4: gz-msgs ign -> gz Namespace Migration : gz-msgs gazebosim/gz-msgs#252 (Should be taken in its entirety due to hard tock)
• 4: gz-common ign -> gz Namespace migration (narrow) : gz-common gazebosim/gz-common#357
• 3: sdformat ign -> gz Namespace migration (narrow) : sdformat gazebosim/sdformat#1026
• 3: gz-transport
• 3: gz-rendering
• 2: gz-physics
• 2: gz-sensors
• 2: gz-gui
• 2: gz-fuel-tools
• 1: gz-sim
• 0: gz-launch

Partial Macros and Docs

Pre-req

• ign -> gz File Move for IgnHlms gazebosim/gz-rendering#631

---

• 6: gz-cmake ign -> gz Namespace Migration : gz-cmake gazebosim/gz-cmake#256
  • Followup: ign -> gz Namespace Migration (2) : gz-cmake gazebosim/gz-cmake#260
• 6: gz-utils ign -> gz Namespace Migration : gz-utils gazebosim/gz-utils#61
  • Superceded: [ign to gz] C++ namespaces gazebosim/gz-utils#50
• 5: gz-math ign -> gz Namespace Migration : gz-math gazebosim/gz-math#430
  • Narrowed: ign -> gz Namespace migration (narrow) : gz-math  gazebosim/gz-math#431
• 5: gz-tools ign -> gz Namespace Migration : gz-tools gazebosim/gz-tools#89
  • Related: Standardize config macros gazebosim/gz-tools#90
• 4: gz-plugin ign -> gz Namespace Migration : gz-plugin gazebosim/gz-plugin#83
  • Superceded: [ign to gz] C++ namespaces gazebosim/gz-plugin#75
  • Follow up: ign -> gz Add Missing Header : gz-plugin gazebosim/gz-plugin#86
• 4: gz-msgs ign -> gz Namespace Migration : gz-msgs gazebosim/gz-msgs#252
• 4: gz-common ign -> gz Namespace Migration : gz-common gazebosim/gz-common#356
• 3: sdformat ign -> gz Namespace Migration : sdformat gazebosim/sdformat#1022
• 3: gz-transport ign -> gz Namespace Migration : gz-transport gazebosim/gz-transport#311
• 3: gz-rendering ign -> gz Namespace Migration : gz-rendering gazebosim/gz-rendering#629
• 2: gz-physics ign -> gz Namespace Migration : gz-physics gazebosim/gz-physics#348
• 2: gz-sensors ign -> gz Namespace Migration : gz-sensors gazebosim/gz-sensors#226
• 2: gz-gui ign -> gz Namespace Migration : gz-gui gazebosim/gz-gui#401
  • Related: ign -> gz Migrate Examples : gz-gui gazebosim/gz-gui#406
• 2: gz-fuel-tools ign -> gz Namespace Migration : gz-fuel-tools gazebosim/gz-fuel-tools#251
• 1: gz-sim ign -> gz Namespace Migration : gz-sim gazebosim/gz-sim#1496
• 0: gz-launch ign -> gz Namespace Migration : gz-launch gazebosim/gz-launch#163

Future Work

After the namespaces are migrated, we need to do the source and macro migration (from upstream to downstream.)

[methylDragon]

We... are going to need to merge these in topological order again :(

[chapulina]

All namespaces merged!