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c136f2b8b9
If we cannot locate a .exe for a git tool that we want to run than it may just be a Bourne shell script as these are popular in Git. In such a case the first line of the file will say "#!/bin/sh" so a UNIX kernel knows what program to start to parse and run that. But Windows doesn't support shbang lines, and neither does the Tcl that comes with Cygwin. We can pass control off to the git wrapper as that is a real Cygwin program and can therefore start the Bourne shell script, but that is at least two fork+exec calls to get the program running. One to do the fork+exec of the git wrapper and another to start the Bourne shell script. If the program is run multiple times it is rather expensive as the magic shbang detection won't be cached across executions. On MinGW/MSYS we don't have the luxury of such magic detection. The MSYS team has taught some of this magic to the git wrapper, but again its slower than it needs to be as the git wrapper must still go and run the Bourne shell after it is called. We now attempt to guess the shbang line on Windows by reading the first line of the file and building our own command line path from it. Currently we support Bourne shell (sh), Perl and Python. That is the entire set of shbang lines that appear in git.git today. Signed-off-by: Shawn O. Pearce <spearce@spearce.org> |
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| .gitignore | ||
| git-gui.sh | ||
| GIT-VERSION-GEN | ||
| Makefile | ||